Osteotome blades and surgical chisel blades for joint revision surgery

Abstract

This application is directed to osteotome blades and surgical chisel blades for joint revision surgery, which include multiple anterior guide slots with multiple posterior blade guide slots, a central cavity, and a two-way adjustable L-shaped guide plate. The central cavity of the surgical osteotome blade guide block houses a stem trunnion fixation and is fixed to the prosthesis to be extracted. The guide blade block is fixed to the trunnion of the prosthesis to be extracted using a stem trunnion fixation member housed within the guide block. Straight, curved, flexible, rigid, and compound-curved osteotome blades are guided by the blade guide slots to separate the implant from the bone. The osteotome blades and surgical chisel blades for joint revision surgery facilitate the rapid, efficient, and complete removal of existing prosthetic joints during joint revision surgery, significantly improving the medical outcomes of joint revision surgery.

Description

[Technical Field]

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS This non-provisional patent application is a division of U.S. Patent Application No. 18 / 075,574, which is a continuation-in-part of Applicant's patent application Ser. No. 17 / 899,521, filed August 30, 2022, which is a continuation-in-part of Applicant's patent application Ser. No. 17 / 899,521, filed December 6, 2021, which is a continuation-in-part of Applicant's patent application Ser. No. 17 / 542,636, filed March 30, 2021. This application is a continuation-in-part of U.S. Patent Application No. 17 / 218,000, which is a continuation-in-part of U.S. Patent Application No. 16 / 398,564, filed April 30, 2019, and U.S. Patent Application No. 17 / 218,000 was finalized as U.S. Patent No. 11,116,525, which issued September 14, 2021, and which claims the benefit of U.S. Provisional Patent Application No. 62 / 665,894, filed May 2, 2018.

[0002] FIELD OF THE INVENTION This application relates to surgical devices for use in joint replacement revision surgeries in the hip, shoulder, and knee areas. More specifically, this application is directed to osteotome blades and chisel blades for joint revision surgery to remove existing implants, including osteotome blade / chisel guide blocks, surgical sliding hammers, locking osteotome blade / chisel handles, and a number of uniquely shaped flexible medial calcaneal osteotome blades / chisels, rigid anterior and posterior osteotome blades / chisels, and curved lateral shoulder release osteotome blades / chisels. The osteotome blade / chisel guide block has multiple guide slots with multiple posterior blade guide slots, a central cavity, and a two-way adjustable L-shaped guide plate. The blade guide block central cavity is positioned over the trunnion end of the existing prosthesis to be removed and secured to the prosthesis. Straight, curved, and compound-curved osteotome blades are guided by blade guide slots to separate the prosthesis. A guide block is fixed to the implant and can be adjusted to guide the direction and angle of the blade inserted therein; flexible and rigid blades then separate the implant from the bone so that it can be removed by sliding hammer action. Various sizes and configurations of straight, curved, and compound-curved osteotome blades / surgical chisels and related accessories, as well as adjustable guide blocks, can be sold as complete surgeon's hospital kits. Joint revision osteotome blades and surgical chisel blades facilitate the rapid, efficient, and complete removal of existing prosthetic joints during joint revision surgery. [Background technology]

[0003] Background of the Invention There is a growing need to provide new and sophisticated methods for performing delicate surgical procedures, including hip, shoulder, and knee revisions. The similarities between these procedures are that an implant must be inserted into the primary bone in the area, and the artificial joint must be removed when there is a problem with the implant.

[0004] Like any other mechanical device, total hip replacements are subject to various forms of mechanical or biological failure. Such failure may require revision hip replacement surgery to address the cause and consequences of the failure. Revision total hip replacement surgery may require removal of the femoral implant.

[0005] A revision hip implant consists of four parts that work together to restore the natural function of the socket joint: (1) a metal hip stem that is inserted into the top of the femur; (2) a metal cup that holds the cup liner; (3) the cup liner that holds the femur; and (4) a femoral head or ball that is attached to the top of the hip stem and inserted into the cup liner to form the socket joint.

[0006] Wear of the plastic components can have undesirable side effects. The tiny plastic particles that wear away are attacked by the body's immune system, and this immune response also attacks the healthy bone around the implant. This causes the bone in the area around the joint implant to soften as it is absorbed by the body, a condition called osteolysis, thus making the implant unstable and requiring revision.

[0007] If the bone adjacent to the primary implant is accidentally fractured, revision surgery may be required to provide a safe and stable joint. In this case, the original implant may need to be removed, the fracture addressed, and a revision joint implanted.

[0008] Although it is rare, the hip joint can become infected after surgery, which can be successfully treated with antibiotics, but can be serious enough that subsequent reoperation may be necessary.

[0009] Revision hip surgery is relatively rare. In the United States, there are approximately 18 revision hip joints for every 100 hip replacements. The most common reasons for revision are (1) recurrent (recurrent) dislocation of the hip replacement, (2) mechanical failure (loosening or breakage of the implant due to wear), and (3) infection.

[0010] Many innovations for various joint revision devices have been provided in the prior art. While these innovations may be suitable for specific individual purposes they address, they differ from the present joint revision osteotome blades and surgical chisel blades, which are contrasted below. The following is a summary of the prior art patents most relevant to joint revision osteotome blades and surgical chisel blades, as well as a description outlining the differences between the features of the present application and those of the prior art.

[0011] U.S. Patent No. 10,959,738 issued to Sweitzer provides an osteotome designed for implantation and extraction of medical devices / implants. The osteotome includes a handle, a blade mounting assembly around a first end of the handle for receiving a blade, and a wing assembly around a second end of the handle opposite the first end. The wing assembly further includes wings extending outward from the handle.

[0012] U.S. Patent No. 11,191,651 issued to Rivera, Jr., discloses and teaches an implant removal tool used to remove a femoral implant from a femur by providing a substantially U-shaped body having a substantially elongated opening thereover that can be placed over the neck of the femoral implant so that a sharp front edge of the U-shaped body directly contacts the inner surface of the stem of the femoral implant. The U-shaped body may have a front edge that extends beyond the front edge so that the front edge can cut both anteriorly and posteriorly through the implant.

[0013] U.S. Patent Application No. 2022 / 0125591 A1, issued to Rivera, Jr., discloses and claims a tool and associated method for removing a prosthetic joint implant. While the tool can be used to remove a variety of different prosthetic joint implants, it has particular application to removing femoral implants. In one embodiment, both a lateral and a medial tool are utilized. The lateral tool includes a generally arcuate shape with upstanding side walls defining an arcuate interior. The lateral tool is thus sized to follow the lateral contour of the femoral implant. The medial tool includes opposing side walls defining an internal opening. The opening is sized to receive the neck of the femoral implant, thereby allowing the tool to follow closely to the medial bone / implant junction.

[0014] Amino's U.S. Patent Application Publication No. 2022 / 0240948A1 teaches and describes a thin-blade chisel system for separating the outer surface of an orthopedic implant and the inner surface of a bone from each other, which includes a thin-blade chisel having a cutting edge at a longitudinally distal end and a hammer direction change tool engaged with the thin-blade chisel to apply a force in the direction of advancement of the cutting edge. The thin-blade chisel includes a hammer strike receiving portion, preferably a through-hole extending through the thickness, at a predetermined position proximally closer to the surgeon. The hammer direction change tool includes a hammer portion located at the proximal end for striking with a hammer and a recess formed at the distal end that engages with the inner circumferential surface of the through-hole.

[0015] None of the aforementioned prior art teaches or suggests the particularly unique features and components of osteotome blades and surgical chisel blades for joint revision surgery, thereby highlighting the need for further improvements in the types of surgical device systems that can be used for these purposes, i.e., to more easily extract existing prosthetic joints and implants, make revision surgery more efficient and effective, and improve patient outcomes.

[0016] In this regard, before describing in detail at least one embodiment of a joint revision osteotome blade and surgical chisel blade, it should be understood that the design is not limited in its application to the details of construction and the arrangement of components set forth in the following description or illustrated in the drawings. The joint revision osteotome blade and surgical chisel blade disclosed herein are capable of other embodiments and of being practiced and carried out in various ways. It should also be understood that the phraseology and terminology employed herein are for the purpose of description and should not be regarded as limiting. Summary of the Invention [Means for solving the problem]

[0017] Summary of the Invention The primary advantages of joint revision osteotome blades and surgical chisel blades are that joint revision procedures can be performed significantly faster, safer, and more successfully, with significantly less blood loss during joint revision procedures, and much less time spent in the operating room during joint revision procedures.

[0018] Another advantage of using osteotome blades and surgical chisel blades for joint revision surgery is that joint revision surgery is performed with less instrumentation and tools, such as cables and long stems, during the procedure.

[0019] Additional advantages of using osteotome blades and surgical chisel blades for joint revision surgery are a shorter time to full weight bearing after joint revision surgery, fewer complications during and after joint revision surgery, and less morbidity and mortality after joint revision surgery.

[0020] Another advantage of using osteotome blades and surgical chisel blades for joint revision surgery is that they accommodate collared femoral stems, which are much more difficult to remove than collarless femoral stems.

[0021] The advantage of the osteotome blades and surgical chisel blades for joint revision surgery is that they provide a surgical system with four major components, including: (1) an osteotome blade / surgical chisel blade guide block assembly, (2) a surgical sliding hammer, (3) an osteotome blade / surgical chisel locking handle assembly, and (4) a variety of both flexible and rigid osteotome / surgical chisel cutting blades.

[0022] The benefit of the revision osteotome blade and surgical chisel blade is that it provides a surgical sliding hammer that can be attached to a guide block for rapid implant extraction during revision procedures.

[0023] Another advantage of using osteotome blades and surgical chisel blades for joint revision surgery is that it provides an osteotome blade / surgical chisel locking handle assembly that allows for the rapid insertion and removal of various osteotome blades / surgical chisels as needed by the surgeon during the joint revision procedure.

[0024] Another advantage of the joint revision surgery device is that it provides flexible, uniquely shaped medial calcaneal osteotome and surgical chisel blades, curved lateral shoulder release osteotome and surgical chisel blades, general-purpose osteotome and surgical chisel blades, and anterior and posterior osteotome and surgical chisel blades.

[0025] Another advantage of the joint revision surgery device is that it provides a flexible, uniquely shaped medial calcaneal osteotome blade with spoon-shaped and spork-shaped sharp cutting edges, as well as both osteotome blades beveled on both sides of the cutting edge and surgical chisel blades beveled on one side of the cutting edge.

[0026] Another advantage of the joint revision surgery device is that it provides flexible and rigid osteotome and chisel blades in the form of curved lateral shoulder release osteotome and chisel blades.

[0027] Another advantage of the joint revision device is that it provides rigid, uniquely shaped anterior and posterior osteotome blades and surgical chisel blades.

[0028] Another advantage of the joint revision surgery device is that it provides a flexible, uniquely shaped medial calcaneal osteotome blade with spoon-shaped and spork-shaped pointed cutting edges, like both osteotome blades with elongated blade shafts and narrower cutting edges, and surgical chisel blades with beveled cutting edges on one side of the cutting edge.

[0029] In essence, four major components—(1) the osteotome blade / surgical chisel guide block assembly, (2) the osteotome blade / surgical chisel locking handle assembly, (3) the surgical sliding hammer, and (4) the various flexible medial calcaneal osteotome blade / surgical chisel, lateral shoulder release blades, anterior and posterior blades, and universal release chisels for joint revision osteotome blades and surgical chisel blades—all work synergistically together to make implant extraction more efficient, less time consuming, and with significantly less patient blood loss, all of which improves patient outcomes. Furthermore, the system can be adjusted to accommodate any size and shape of implant being extracted, including collared and collarless prostheses. The guide block assembly embodiment of the joint revision surgery system, as well as the method in which the assembled osteotome blade / chisel guide block has an adjustable L-shaped osteotome blade / chisel guide plate with a lower and upper portion, can be adjusted in two distinct ways. First, the adjustment plate retaining screw can be threaded outward (raised) or inward (lowered) to retract the lower adjustment plate toward or extend it away from the stem. Second, the adjustment plate retaining screw can be moved closer to or farther from the stem as the guide slots are removed, shifting the lower guide plate to a different guide slot within the multiple blade guide slots. One or both of the aforementioned guide plate adjustments can successfully guide the cutting blade under stems of various sizes, and in this way, the guide block assembly can accommodate various stem sizes removed during revision surgery. Furthermore, both collared and collarless stems can be removed by appropriately adjusting the length and distance of the adjustable guide plate.

[0030] A joint revision surgery system is provided, comprising: (a) an osteotome blade and surgical chisel blade guide block assembly having a centrally located cavity and a plurality of forwardly located osteotome blade guide slots, a stem trunnion fixation member removably located within the central cavity and secured to the osteotome blade guide block, an L-shaped adjustable blade guide plate movably located within the plurality of forwardly located osteotome blade / surgical chisel guide slots, and a plurality of rearwardly located osteotome blade / surgical chisel guide slots for receiving osteotome blades and surgical chisels; (b) a surgical sliding hammer assembly; (c) an osteotome blade / surgical chisel locking handle assembly; and (d) a plurality of osteotome blades and surgical chisel blades, including osteotome blades having flexible and rigid blade shafts. The osteotome blade / surgical chisel guide block is attached to the implanted femoral stem for extraction by attaching the stem trunnion fixation member to the stem trunnion, and the L-shaped adjustable guide plate is then adjusted upward and downward using the retaining screw. The L-shaped adjustable guide plate is adjusted anteriorly and posteriorly by extending the lower portion of the adjustable guide plate into one or more of the guide slots defined by the guide block assembly, and then extending the flexible osteotome blade downward through the anteriorly placed osteotome blade guide slot containing the L-shaped adjustable guide plate to reach the femoral stem and thereby sever the femoral stem from the femur during the revision surgery. What is the difference between a surgical chisel and an osteotome blade? An osteotome is an orthopedic surgical instrument typically used to cut bone. A surgical chisel is used to shape bone. Functionally, the main difference is that a chisel has one beveled edge, while an osteotome has two beveled edges.Additionally, flexible medial calcaneal osteotome blades with spoon-shaped and spork-shaped cutting edges can be configured to be osteotome blades with two beveled sharp cutting edges, or surgical chisels with only one beveled sharp cutting edge. This is also an aspect of the present invention; all of the blades disclosed and described herein can be configured as either osteotome blades or surgical chisels, can be flexible or rigid, and can be curved and compound curved (curved in two planes). Osteotomes and surgical chisels are collectively known as osteotomes, and are a group of surgical blades that includes a subgroup of surgical chisels.

[0031] With regard to the above, optimal dimensions for the components of the joint revision osteotome blade and surgical chisel blade, including various sizes, materials, shapes, forms, functions, and methods of operation, assembly, and use, will be readily apparent to those skilled in the art, and all equivalents to those shown in the drawings and described herein are intended to be encountered by the present design. The foregoing is therefore considered to illustrate only the principles of the joint revision osteotome blade and surgical chisel blade. Since numerous further modifications and variations will readily occur to those skilled in the art, it is not desired to limit the joint revision osteotome blade and surgical chisel blade to the exact structure and operation shown and described; therefore, all suitable modifications and equivalents may be reclassified to fall within the scope of the present application.

[0032] While the devices and methods have been or will be described for grammatical fluidity in functional descriptions, unless expressly stated otherwise under 35 U.S.C. 112 or similar applicable statute, the claims should not be construed as necessarily limited in any manner by the construction of "means" or "step" limitations, but should be consistent with the meaning and full scope of equivalents of the definitions provided by the claims under the underlying principles of equivalent statutes, and if the claims are expressly stated under 35 U.S.C. 112, they should be consistent with the full statutory equivalents under 35 U.S.C. 112 or similar applicable statute. The joint revision device can be better visualized with reference to the following drawings, in which like elements are referenced by like numerals:

[0033] BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are incorporated in and form a part of this specification, illustrate embodiments of osteotome blades and surgical chisel blades for joint revision surgery and, together with the description, serve to explain the principles of the present application. [Brief explanation of the drawings]

[0034] [Figure 1] 1 depicts a top elevated perspective view of an alternative embodiment of a joint revision device showing an assembled osteotome blade / surgical chisel guide block with an adjustable L-shaped osteotome blade guide plate fully extended downwards. [Figure 2] 10 depicts a side elevation view of an alternative embodiment of a joint revision device showing an assembled osteotome blade guide block with an adjustable L-shaped osteotome blade guide plate fully extended downwards. [Figure 3] 1 depicts an enlarged side elevation view of the upper guide plate and guide plate adjustment screw with integral retaining washer welded to the underside of the upper guide plate. [Figure 4] 10 depicts a front view of an alternative embodiment of a joint revision device showing an assembled osteotome blade guide block with an adjustable L-shaped osteotome blade guide plate fully extended downwards. [Figure 5] FIG. 4 depicts a cross-sectional view of an alternative embodiment of a joint revision surgery device showing an assembled osteotome blade guide block with an adjustable L-shaped osteotome blade guide plate fully extended downward. [Figure 6] 1 depicts a top plan view of an alternative embodiment of a joint revision device showing an assembled osteotome blade guide block with an adjustable L-shaped osteotome blade guide plate. [Figure 7] 10 depicts a side elevation view of an alternative embodiment of a joint revision device showing an assembled osteotome blade guide block with an adjustable L-shaped osteotome blade guide plate. [Figure 8] 10 depicts a bottom view of an alternative embodiment of a joint revision device showing an assembled osteotome blade guide block with an adjustable L-shaped osteotome blade guide plate. [Figure 9] 1 depicts a top elevated perspective view of an alternative embodiment of a joint revision device showing an assembled osteotome blade guide block with an adjustable L-shaped osteotome blade guide plate. [Figure 10] 10 depicts a bottom rear view of an alternative embodiment of a joint revision device showing an assembled osteotome blade guide block with an adjustable L-shaped osteotome blade guide plate. [Figure 11] 1 depicts a top elevated perspective view of an alternative embodiment of a joint revision device showing an assembled osteotome blade guide block with an adjustable L-shaped osteotome blade guide plate fully retracted upward. [Figure 12] 10 depicts a side elevation view of an alternative embodiment of a joint revision device showing an assembled osteotome blade guide block with an adjustable L-shaped osteotome blade guide plate retracted fully upward. [Figure 13] 10 depicts a front view of an alternative embodiment of a joint revision surgery device showing an assembled osteotome blade guide block with an adjustable L-shaped osteotome blade guide plate retracted fully upward. [Figure 14] FIG. 14 depicts a cross-sectional view of an alternative embodiment of a joint revision surgery device showing the assembled osteotome blade guide block with the adjustable L-shaped osteotome blade guide plate fully retracted upward. [Figure 15] 1 depicts a cross-sectional view of an alternative embodiment of a joint revision surgery device showing an assembled osteotome blade guide block with an adjustable L-shaped osteotome blade guide plate extending fully downward and positioned in the middle osteotome blade guide slot in the guide block. [Figure 16] 1 depicts a cross-sectional view of an alternative embodiment of a joint revision device showing an assembled osteotome blade guide block with an adjustable L-shaped osteotome blade guide plate fully retracted upward and positioned in the middle osteotome blade guide slot in the guide block. [Figure 17] 1 depicts a cross-sectional view of an alternative embodiment of a joint revision device showing an assembled osteotome blade guide block with an adjustable L-shaped osteotome blade guide plate extending fully downward and positioned in the uppermost osteotome blade guide slot in the guide block. [Figure 18] 1 depicts a cross-sectional view of an alternative embodiment of a joint revision device showing an assembled osteotome blade guide block with an adjustable L-shaped osteotome blade guide plate fully retracted upward and positioned in the uppermost osteotome blade guide slot in the guide block. [Figure 19] Draw a side view of the stem-trunnion fixing piece. [Figure 20] Draw a cross section of the stem-trunnion fixation piece as shown in Figure 19. [Figure 21] Draw a bottom view of the stem trunnion fixing piece. [Figure 22] Draw a side perspective view of the stem trunnion fixing piece. [Figure 23]1 depicts an exploded view of an alternative embodiment of a joint revision device showing an assembled osteotome blade guide block with an adjustable L-shaped osteotome blade guide plate showing the position of the osteotome blades prior to insertion into the anterior and posterior osteotome blade guide slots in the guide block. [Figure 24] 1 depicts a cross-sectional view of an alternative embodiment of a joint revision device showing an assembled osteotome blade guide block with an adjustable L-shaped osteotome blade guide plate showing surgical osteotome blades inserted into the anterior and posterior osteotome blade guide slots in the guide block for removing a collarless implanted femoral stem. [Figure 25] 1 depicts a cross-sectional view of an alternative embodiment of a joint revision device showing an assembled osteotome blade guide block with an adjustable L-shaped osteotome blade guide plate showing surgical osteotome blades inserted into the anterior and posterior osteotome blade guide slots in the guide block for removing a collarless implanted femoral stem. [Figure 26] 1 depicts a cross-sectional view of an alternative embodiment of a joint revision device showing an assembled osteotome blade guide block with an adjustable L-shaped osteotome blade guide plate showing osteotome blades inserted into the anterior and posterior osteotome blade guide slots in the guide block for removing a collarless implanted femoral stem. [Figure 27] 1 depicts a cross-sectional view of an alternative embodiment of a joint revision device showing an assembled osteotome blade guide block with an adjustable L-shaped osteotome blade guide plate showing osteotome blades inserted into the anterior and posterior osteotome blade guide slots in the guide block for removing a collarless implanted femoral stem. [Figure 28]1 depicts a cross-sectional view of an alternative embodiment of a joint revision device showing an assembled osteotome blade guide block with an adjustable L-shaped osteotome blade guide plate showing osteotome blades inserted into the anterior and posterior osteotome blade guide slots in the guide block for removing a collarless implanted femoral stem. [Figure 29] 1 depicts a cross-sectional view of an alternative embodiment of a joint revision device showing an assembled osteotome blade guide block with an adjustable L-shaped osteotome blade guide plate showing osteotome blades inserted into the anterior and posterior osteotome blade guide slots in the guide block for removing a collared implanted femoral stem. [Figure 30] 1 depicts a cross-sectional view of an alternative embodiment of a joint revision device showing an assembled osteotome blade guide block with an adjustable L-shaped osteotome blade guide plate showing osteotome blades inserted into the anterior and posterior osteotome blade guide slots in the guide block for removing a collared implanted femoral stem. [Figure 31] 1 depicts a top view of a heavy curved blade with a curved pointed tip and metal end cap. [Figure 32] FIG. 1 depicts a side view of a heavy curved blade with a curved pointed tip and metal end cap. [Figure 33] 1 depicts a top view of a thin curved blade with a curved pointed tip and a metal end cap. [Figure 34] 1 depicts a side view of a thin curved blade with a curved pointed tip and a metal end cap. [Figure 35] 1 depicts a top view of a straight, shallow, flat blade with a chisel-shaped pointed tip and a metal end cap. [Figure 36] 1 depicts a top view of a straight, wide, flat blade with a triangular pointed tip and a metal end cap. [Figure 37] A side view of a thin curved blade with a sharp point, straight handle and metal end cap is depicted. [Figure 38]Side view of a thin curved blade with a sharp point, a two-part handle with a closed metal end cap. [Figure 39] 1 depicts a top-elevation perspective view of a surgical sliding hammer that can be attached to an assembled surgical osteotome blade guide block. [Figure 40] Figure 1 depicts a top plan view of the surgical sliding hammer that can be attached to the assembled surgical osteotome blade / surgical chisel guide block. [Figure 41] Figure 1 shows a side elevation view of the surgical sliding hammer that can be attached to the assembled osteotome blade / surgical chisel guide block. [Figure 42] Figure 1 depicts a bottom view of the surgical sliding hammer that can be attached to the assembled surgical osteotome blade / surgical chisel guide block. [Figure 43] 41 depicts a rotated side elevation view rotated 90 degrees of a surgical sliding hammer attachable to an assembled surgical osteotome blade / surgical chisel guide block as shown. [Figure 44] FIG. 1 depicts a top elevated perspective view of a surgical sliding hammer that can be attached to an assembled osteotome blade guide block, shown here attached to the assembled surgical osteotome blade guide block. [Figure 45] FIG. 1 depicts a side elevation view of a surgical sliding hammer that can be attached to an assembled osteotome blade guide block, shown here attached to the assembled surgical osteotome blade guide block. [Figure 46] FIG. 1 depicts a rear view of a surgical sliding hammer that can be attached to an assembled osteotome blade guide block, shown here attached to an assembled surgical osteotome blade guide block. [Figure 47] 46 depicts a cross-sectional view of a surgical sliding hammer that can be attached to an assembled osteotome blade guide block, shown here attached to the assembled surgical osteotome blade guide block of FIG. [Figure 48] FIG. 1 depicts a bottom view of a surgical sliding hammer that can be attached to an assembled osteotome blade guide block, shown here attached to an assembled surgical osteotome blade guide block. [Figure 49] FIG. 1 depicts a top elevated perspective view of a surgical sliding hammer that can be attached to an assembled osteotome blade guide block, shown here attached to the assembled surgical osteotome blade guide block. [Figure 50] 1 depicts a top plan view of a surgical sliding hammer that can be attached to an assembled osteotome blade guide block, shown here attached to an assembled surgical osteotome blade guide block. [Figure 51] FIG. 1 depicts a side elevation view of a surgical sliding hammer that can be attached to an assembled osteotome blade guide block, shown here attached to the assembled surgical osteotome blade guide block. [Figure 52] 1 depicts a top elevated perspective view of an osteotome-handle assembly for locking a surgical blade, having a surgical osteotome blade inserted therein and showing the locking lever in an outwardly locked position securing the surgical osteotome blade therein. [Figure 53] 1 depicts a bottom elevated perspective view of an osteotome-handle assembly for locking a surgical blade, having a surgical osteotome blade inserted therein and showing the locking lever in an outwardly locked position securing the surgical osteotome blade therein. [Figure 54] 1 depicts a top elevated perspective view of an osteotome-handle assembly for locking a surgical blade, with a surgical osteotome blade inserted therein, showing the locking lever in an inwardly disengaged position allowing for insertion and removal of the surgical osteotome blade. [Figure 55]FIG. 1 depicts a top elevated perspective exploded view of an osteotome-handle assembly for locking a surgical blade, with a surgical osteotome blade inserted therein, showing the locking lever in an inwardly disengaged position allowing for insertion and removal of the surgical osteotome blade. [Figure 56] FIG. 1 depicts a bottom elevated perspective exploded view of an osteotome-handle assembly for locking a surgical blade, with a surgical osteotome blade inserted therein, showing the locking lever in an inward, disengaged position allowing for insertion and removal of the surgical osteotome blade. [Figure 57] 1 depicts a front view of an osteotome-handle assembly for locking a surgical blade, with a surgical osteotome blade inserted therein. [Figure 58] 1 depicts a side elevation view of an osteotome-handle assembly for locking a surgical blade, with a surgical osteotome blade inserted therein, showing the locking lever in an inward, disengaged position allowing the surgical osteotome blade to be inserted and removed. [Figure 59] 1 depicts a top plan view of an osteotome-handle assembly for locking a surgical blade, having a surgical osteotome blade inserted therein and showing the locking lever in an outwardly locked position securing the surgical osteotome blade therein. [Figure 60] 1 depicts a bottom view of an osteotome-handle assembly for locking a surgical blade, having a surgical osteotome blade inserted therein and showing the locking lever in an outwardly locked position securing the surgical osteotome blade therein. [Figure 61] 1 depicts a front view of an osteotome-handle assembly for locking a surgical blade, having a surgical osteotome blade inserted therein and showing the locking lever in an outwardly locked position securing the surgical osteotome blade therein. [Figure 62] 62 depicts a cross-sectional view of an osteotome-handle assembly for locking a surgical blade, having a surgical osteotome blade inserted therein and showing the locking lever in an outwardly locked position securing the surgical osteotome blade therein, as shown in FIG. [Figure 63]1 depicts a top view of an osteotome-handle assembly for locking a surgical blade, with a surgical osteotome blade inserted therein, showing the locking lever in an inward, disengaged position allowing the surgical osteotome blade to be inserted and removed. [Figure 64] 1 depicts a front view of an osteotome-handle assembly for locking a surgical blade, with a surgical osteotome blade inserted therein, showing the locking lever in an inward, disengaged position allowing the surgical osteotome blade to be inserted and removed. [Figure 65] 1 depicts a bottom view of an osteotome-handle assembly locking a surgical blade, with a surgical osteotome blade inserted therein and showing the locking lever in a closed position. [Figure 66] 1 depicts a side elevation view of an osteotome-handle assembly for locking a surgical blade, with a surgical osteotome blade inserted therein, showing the locking lever in an inward, disengaged position allowing the surgical osteotome blade to be inserted and removed. [Figure 67] 1 depicts a cross-sectional side elevation view of a surgical blade-locking osteotome handle assembly with a surgical osteotome blade inserted therein, shown here attached to a surgical osteotome blade guide block assembly. [Figure 68] 68 depicts a rear view of a surgical blade-locking osteotome handle assembly with a surgical osteotome blade inserted therein, shown here attached to a surgical osteotome blade guide block assembly as shown in FIG. 67. [Figure 69] FIG. 1 depicts a top elevated perspective view of a flexible medial calcaneal osteotome blade having a spoon-shaped cutting edge. [Figure 70] 1 depicts a front view of a flexible medial calcaneal osteotome blade with a spoon-shaped cutting edge. [Figure 71] As shown in FIG. 70, a cross section of a flexible medial calcaneal osteotome blade with a spoon-shaped cutting edge is depicted. [Figure 72]1 depicts a top plan view of a flexible medial calcaneal osteotome blade with a spoon-shaped cutting edge. [Figure 73] 1 depicts a bottom view of a flexible medial calcaneal osteotome blade with a spoon-shaped cutting edge. [Figure 74] 1 depicts a rear view of a flexible medial calcaneal osteotome blade with a spoon-shaped cutting edge. [Figure 75] 1 depicts a left side elevation view of a flexible medial calcaneal osteotome blade with a spoon-shaped cutting edge. [Figure 76] 1 depicts a front view of a flexible medial calcaneal osteotome blade with a spoon-shaped cutting edge. [Figure 77] 76 depicts a right-side elevation view of a flexible medial calcaneal osteotome blade with a spoon-shaped cutting edge, showing the opposite side to FIG. 75. [Figure 78] 1 depicts a bottom view of a flexible medial calcaneal osteotome blade with a spoon-shaped cutting edge and an elongated blade shaft. [Figure 79] 1 depicts a top plan view of a flexible medial calcaneal osteotome blade having a spoon-shaped cutting edge and an elongated blade shaft. [Figure 80] 1 depicts a rear view of a flexible medial calcaneal osteotome blade with a spoon-shaped cutting edge and an elongated blade shaft. [Figure 81] 1 depicts a left side elevational view of a flexible medial calcaneal osteotome blade with a spoon-shaped cutting edge and an elongated blade shaft. [Figure 82] 1 depicts a front view of a flexible medial calcaneal osteotome blade having a spoon-shaped cutting edge and an elongated blade shaft. [Figure 83] 1 depicts a right side elevational view of a flexible medial calcaneal osteotome blade with a spoon-shaped cutting edge and an elongated blade shaft. [Figure 84] FIG. 1 depicts a top elevated perspective view of a flexible medial calcaneal osteotome blade having a spoon-shaped cutting edge and an elongated blade shaft. [Figure 85] 1 depicts a front view of a flexible medial calcaneal osteotome blade having a spoon-shaped cutting edge and an elongated blade shaft. [Figure 86] As shown in FIG. 85, a cross-sectional view of a flexible medial calcaneal osteotome blade having a spoon-shaped cutting edge and an elongated blade shaft is depicted. [Figure 87] FIG. 1 depicts a top elevated perspective view of a flexible medial calcaneal osteotome blade having a spork-shaped cutting edge and an elongated blade shaft. [Figure 88] 1 depicts a front view of a flexible medial calcaneal osteotome blade having a spork-shaped cutting edge and an elongated blade shaft. [Figure 89] As shown in FIG. 88, a cross-sectional view of a flexible medial calcaneal osteotome blade having a spork-shaped cutting edge and an elongated blade shaft is depicted. [Figure 90] 1 depicts a top plan view of a flexible medial calcaneal osteotome blade with a spork-shaped cutting edge. [Figure 91] 1 depicts a bottom view of a flexible medial calcaneal osteotome blade with a spork-shaped cutting edge. [Figure 92] 1 depicts a rear view of a flexible medial calcaneal osteotome blade with a spork-shaped cutting edge. [Figure 93] 1 depicts a left side elevational view of a flexible medial calcaneal osteotome blade with a spork-shaped cutting edge. [Figure 94] 1 depicts a front view of a flexible medial calcaneal osteotome blade with a spork-shaped cutting edge. [Figure 95] 1 depicts a right side elevation view of a flexible medial calcaneal osteotome blade with a spork-shaped cutting edge. [Figure 96] FIG. 1 depicts a top elevated perspective view of a flexible medial calcaneal osteotome blade having a spork-shaped cutting edge and an elongated blade shaft. [Figure 97] 1 depicts a front view of a flexible medial calcaneal osteotome blade having a spork-shaped cutting edge and an elongated blade shaft. [Figure 98] As shown in FIG. 97, a cross-sectional view of a flexible medial calcaneal osteotome blade having a spork-shaped cutting edge and an elongated blade shaft is depicted. [Figure 99]1 depicts a top plan view of a flexible medial calcaneal osteotome blade having a spork-shaped cutting edge and an elongated blade shaft. [Figure 100] 1 depicts a bottom view of a flexible medial calcaneal osteotome blade with a spork-shaped cutting edge and an elongated blade shaft. [Figure 101] 1 depicts a rear view of a flexible medial calcaneal osteotome blade with a spork-shaped cutting edge and an elongated blade shaft. [Figure 102] 1 depicts a left side elevational view of a flexible medial calcaneal osteotome blade having a spork-shaped cutting edge and an elongated blade shaft. [Figure 103] 1 depicts a front view of a flexible medial calcaneal osteotome blade having a spork-shaped cutting edge and an elongated blade shaft. [Figure 104] FIG. 1 depicts a right side elevation view of a flexible medial calcaneal osteotome blade having a spork-shaped cutting edge and an elongated blade shaft. [Figure 105] A top plan view of the curved lateral shoulder release osteotome blade is shown. [Figure 106] 1 depicts a bottom view of a curved lateral shoulder release osteotome blade. [Figure 107] 1 depicts a left side elevation view of a curved lateral shoulder release osteotome blade. [Figure 108] 1 depicts a front view of a curved lateral shoulder release osteotome blade. [Figure 109] 10 depicts a right-side elevation view of a curved lateral shoulder release osteotome blade. [Figure 110] 1 depicts an upper elevated perspective view of a curved lateral shoulder release osteotome blade. [Figure 111] 1 depicts an upper elevated perspective view of a curved lateral shoulder release osteotome blade. [Figure 112] 1 depicts a front view of a curved lateral shoulder release osteotome blade. [Figure 113] A cross-sectional view of a curved lateral shoulder release osteotome blade is depicted as shown in FIG. [Figure 114] 1 depicts a top plan view of a curved lateral shoulder release osteotome blade with a protruding stop feature on the blade shaft. [Figure 115] 1 depicts a bottom view of a curved lateral shoulder release osteotome blade with a protruding stop feature on the blade shaft. [Figure 116] 1 depicts a rear view of a curved lateral shoulder release osteotome blade with a protruding stop feature on the blade shaft. [Figure 117] 1 depicts a front view of a curved lateral shoulder release osteotome blade with a protruding stop feature on the blade shaft. [Figure 118] 1 depicts a right side elevation view of a curved lateral shoulder release osteotome blade with a protruding stop feature on the blade shaft. [Figure 119] 1 depicts a left side elevation view of a curved lateral shoulder release osteotome blade with a protruding stop feature on the blade shaft. [Figure 120] FIG. 1 depicts a top elevation perspective view of a curved lateral shoulder release osteotome blade having a protruding stop feature on the blade shaft. [Figure 121] 1 depicts a front view of a curved lateral shoulder release osteotome blade with a protruding stop feature on the blade shaft. [Figure 122] As shown in FIG. 121, a cross section of a curved lateral shoulder release osteotome blade having a protruding stop feature on the blade shaft is depicted. [Figure 123] Figure 1 shows an upper elevated perspective view of a general-purpose release chisel osteotome blade. [Figure 124] Front view of a general-purpose release chisel osteotome blade. [Figure 125] Figure 124 depicts a cross section of a general-purpose release chisel osteotome blade. [Figure 126] Draw a top plan view of the general-purpose release chisel osteotome blade. [Figure 127] Drawing a bottom view of a general-purpose release chisel osteotome blade. [Figure 128] Draw a rear view of a general-purpose release chisel osteotome blade. [Figure 129] Left side elevation view of a general-purpose release chisel osteotome blade. [Figure 130] Front view of a general-purpose release chisel osteotome blade. [Figure 131]Right-side elevation view of a general-purpose release chisel osteotome blade. [Figure 132] FIG. 1 depicts a top elevated perspective view of an anterior and posterior osteotome blade with a left curved cutting edge and a right straight cutting edge. [Figure 133] 1 depicts a front view of an anterior and posterior osteotome blade with a left curved cutting edge and a right straight cutting edge. [Figure 134] As shown in Figure 133, a cross section of anterior and posterior osteotome blades with a curved cutting edge on the left and a straight cutting edge on the right is depicted. [Figure 135] 1 depicts a top plan view of anterior and posterior osteotome blades with a curved cutting edge on the left and a straight cutting edge on the right. [Figure 136] 1 depicts a bottom view of anterior and posterior osteotome blades with a left curved cutting edge and a right straight cutting edge. [Figure 137] 1 depicts a rear view of anterior and posterior osteotome blades with a left curved cutting edge and a right straight cutting edge. [Figure 138] 1 depicts a left side elevation view of an anterior and posterior osteotome blade with a left curved cutting edge and a right straight cutting edge. [Figure 139] 1 depicts a front view of an anterior and posterior osteotome blade with a left curved cutting edge and a right straight cutting edge. [Figure 140] 1 depicts a right side elevation view of anterior and posterior osteotome blades with a left curved cutting edge and a right straight cutting edge. [Figure 141] 132-140 depict upper elevated perspective views of anterior and posterior osteotome blades configured as mirror images of the blades shown in FIGS. 132-140, with a right curved cutting edge and a left straight cutting edge. [Figure 142] 1 depicts a front view of an anterior and posterior osteotome blade with a right curved cutting edge and a left straight cutting edge. [Figure 143] 143 depicts a cross-sectional view of the anterior and posterior osteotome blades shown in FIG. 142 with a right curved cutting edge and a left straight cutting edge. [Figure 144]1 depicts a top plan view of anterior and posterior osteotome blades with a right curved cutting edge and a left straight cutting edge. [Figure 145] 1 depicts a bottom view of anterior and posterior osteotome blades with a right curved cutting edge and a left straight cutting edge. [Figure 146] 1 depicts a rear view of an anterior and posterior osteotome blade with a right curved cutting edge and a left straight cutting edge. [Figure 147] 1 depicts a left side elevation view of an anterior and posterior osteotome blade with a right curved cutting edge and a left straight cutting edge. [Figure 148] 1 depicts a front view of an anterior and posterior osteotome blade with a right curved cutting edge and a left straight cutting edge. [Figure 149] 1 depicts a right side elevation view of anterior and posterior osteotome blades with a right curved cutting edge and a left straight cutting edge. [Figure 150] A front view of the osteotome handle, with a flexible medial calcaneal spoon-shaped blade attached to it, extends through it and, guided by the guide block assembly, severs the medial calcaneus from the implanted femoral stem. [Figure 151] Figure 1 depicts a top elevated perspective view of an osteotome handle with a flexible medial calcaneal spoon-shaped blade attached to it, which extends through it and is guided by the guide block assembly to cut the medial calcaneus from the implanted femoral stem. [Figure 152] Figure 1 depicts a posterior view of the osteotome handle, with the flexible medial calcaneal spoon-shaped blade attached to it, extending through it and guided by the guide block assembly to cut the medial calcaneus from the implanted femoral stem. [Figure 153]152 depicts a cross-sectional view of an osteotome handle with a flexible medial calcaneal spoon-shaped blade attached to it, which extends through it and, guided by the guide block assembly, severs the medial calcaneus from the implanted femoral stem. [Fig. 154] A front view of the osteotome handle, with a flexible medial calcaneal spoon-shaped blade attached to it, extends through it and, guided by the guide block assembly, severs the medial calcaneus from the implanted femoral stem. [Figure 155] Figure 1 depicts a top elevated perspective view of an osteotome handle with a flexible medial calcaneal spoon-shaped blade attached to it, which extends through it and is guided by the guide block assembly to cut the medial calcaneus from the implanted femoral stem. [Figure 156] Figure 1 depicts a posterior view of the osteotome handle, with the flexible medial calcaneal spoon-shaped blade attached to it, extending through it and guided by the guide block assembly to cut the medial calcaneus from the implanted femoral stem. [Figure 157] Figure 156 depicts a cross-sectional view of an osteotome handle with a flexible medial calcaneal spoon-shaped blade attached to it, which extends through it and, guided by the guide block assembly, severs the medial calcaneus from the implanted femoral stem. DETAILED DESCRIPTION OF THE INVENTION

[0035] Detailed Description of the Preferred Embodiments Where appropriate, detailed embodiments of the present joint revision osteotome blades and surgical chisel blades 10A, 20, 100, 140, 200, 220, 260, 270, 280, 290, 300, 320, 340, 350, and 370 are disclosed herein, however, it should be understood that the disclosed embodiments are merely examples of designs that may be embodied in various forms. Accordingly, the specific functional and structural details disclosed herein should not be construed as limitations, but merely as representative principles for teaching those skilled in the art to variously utilize the present designs in any suitable detailed configuration.

[0036] 1 depicts a top elevated perspective view of an embodiment of a joint revision device 10A showing an assembled osteotome blade / surgical chisel guide block 20 (hereinafter referred to as osteotome blade guide slot 20) with an adjustable L-shaped osteotome blade guide plate 38 extending fully downward and positioned in the uppermost blade guide slot of a plurality of blade guide slots 36. As previously described in U.S. Patent Application Nos. 17 / 899,521 and 18 / 075,574, both of which are incorporated herein in their entireties, the guide block is held together using Allen screws and alignment pins (see enlarged view in FIG. 23 below) from two halves 22 and 24. The L-shaped osteotome blade guide plate has an upper portion 26 and a lower portion 38. The guide plate top includes an adjustable guide plate retaining screw slot 28, within which an adjustable guide plate retaining screw 30 threads into a threaded orifice (not shown) in the guide block assembly 20. An adjustable guide plate 38 and a plurality of anterior blade guide slots 36 for receiving osteotome blades (not shown, see below), as well as a central cavity 40, are integrated into the guide block assembly 20. The central cavity 40 is configured to receive a trunnion fixation member 44 (best seen in FIG. 5), which is secured using a locking nut 46. Additionally, the assembled guide block 20 defines a plurality of posterior blade guide slots. In this manner, the guide block can be adjusted to accommodate any size femoral stem implant encountered for removal during revision surgery. The various adjustments are described in more detail below. This view clearly shows the location of the guide plate adjustment screw 30 and adjustment screw slot 28 within the upper portion 26 of the L-shaped guide plate. The adjustment screw 30 can be adjusted up and down by screwing it into or out of the assembled guide block 20, and it can be positioned within any of the blade guide slots 36 within the guide block 20.To move the lower guide plate 38 to another guide slot within the plurality of guide slots 36, the adjustment screw 30 must be loosened and removed, and then replaced by sliding it to another position so that the lower guide plate 38 can be placed in a different guide slot 36.

[0037] 2 depicts a side elevation view of an embodiment of a joint revision device 10A showing the assembled osteotome blade guide block 20 with the fully downwardly extending, adjustable, L-shaped osteotome blade guide plate 38. This view better illustrates the lower guide plate 38 extending downwardly below the guide block assembly 20.

[0038] 3 depicts an enlarged side elevational view of upper guide plate 26 and guide plate adjusting screw 30 with integral retaining washer 40 welded to the underside of upper guide plate 26. Guide plate retaining screw 30 is here partially loosened to expose threaded portion 42. This retaining washer allows guide plate 26 to be raised and secured in an upper position when adjusting plate retaining screw 30 is threaded upward, or lowered when retaining screw 30 is threaded downward. A free-spinning retaining washer (see retaining washer 41 as shown in FIG. 14) can be used in place of this welded retaining washer 40 to accomplish the same task of securing adjusting plates 26 and 38.

[0039] 4 depicts a front view of an alternative embodiment of joint revision device 10A showing the assembled osteotome blade guide block 20 with a fully downwardly extending, adjustable, L-shaped osteotome blade guide plate 38. As previously described in U.S. patent application Ser. No. 17 / 899,521, which is incorporated herein in its entirety, the guide block is made from two half sections 22 and 24. This view better illustrates the lower guide plate 38 extending downwardly into the multiple forward blade guide slots 36 within the guide block assembly 20.

[0040] 5 depicts a cross-sectional view of an embodiment of a joint revision device 10A showing the assembled osteotome blade / surgical chisel guide block 20 with the fully downwardly extended, adjustable, L-shaped upper and lower osteotome blade guide plates 26 and 38 of FIG. 4. This drawing shows the central cavity 40 and the position of the trunnion fixation member 44 within the central cavity 40, secured by a locking nut 46. This drawing also clearly shows the plurality of blade guide slots 36 and the lower guide plate 38 extending downwardly beyond the ends of the plurality of guide slots 36. The lower guide plate 38 can be adjusted by positioning it in any one of the plurality of guide slots 36 by removing the retaining screw 30 and shifting the lower guide plate 38 to a different slot within the plurality of guide slots 36.

[0041] FIG. 6 depicts a top plan view of an embodiment of a joint revision device 10A showing an assembled osteotome blade guide block 20 with an adjustable L-shaped osteotome blade guide plate. As before, the guide block is made of two halves 22 and 24 that are held together using Allen screws and alignment pins (see FIG. 23 below). The L-shaped osteotome blade guide plate has an upper portion 26 and a lower portion 38. The upper guide plate portion includes an adjustable guide plate retaining screw slot 28, within which an adjustable guide plate retaining screw 30 threads into a threaded orifice (not shown) in the guide block assembly 20. Integral to the guide block assembly 20 are the adjustable guide plate 38 and a plurality of forward blade guide slots 36 for receiving osteotome blades (not shown, see below), as well as a central cavity 40. The central cavity 40 is configured to receive a trunnion fixation member 44 (best seen in FIG. 14), which is secured using a locking nut 46. Additionally, the assembled guide block 20 defines a plurality of posterior blade guide slots 32. Forward of these guide blade slots 32 are threaded orifices 34, which accept a T-handle or eyebolt (not shown) (see exploded view in FIG. 23). In this manner, the guide block can be adjusted for any size femoral stem implant encountered for removal during a revision surgery. The various adjustments are described in more detail below.

[0042] 7 depicts a side elevational view of an alternative embodiment of joint revision device 10A, showing the assembled osteotome blade guide block 20 with the adjustable L-shaped upper and lower osteotome blade guide plates 26 and 38, with the drawings including the same parts. This view better illustrates the lower guide plate 38 extending downwardly below the guide block assembly 20.

[0043] 8 depicts a bottom view of an alternative embodiment of joint revision device 10A, showing the assembled osteotome blade guide block 20 with the adjustable L-shaped osteotome blade guide plate upper and lower portions 26 and 38, with the drawings including the same parts. This view better illustrates the upper guide plate retention screw slot 28, as well as the posterior blade guide slot 32, which are integrated into the guide block assembly 20.

[0044] 9 depicts a top elevated perspective view of an alternative embodiment of joint revision device 10A, showing the assembled osteotome blade guide block 20 with the adjustable L-shaped upper and lower osteotome blade guide plates 26 and 38, with the figures including the same parts. Forward of the guide blade slots 32 is a threaded orifice 34, which accepts a T-handle or eyebolt (not shown) (see exploded view in FIG. 23). This view better shows the lower guide plate 38, which extends downwardly below the guide block assembly 20, as well as the trunnion fixation member 44 that holds the nut 46.

[0045] 10 depicts a bottom rear view of an alternative embodiment of joint revision device 10A, showing the assembled osteotome blade guide block 20 with the adjustable L-shaped osteotome blade guide plates upper 26 and lower 38, with the figures including the same parts. This view better illustrates the centrally located cavity 40, the lower guide plate 38 extending downwardly below the guide block assembly 20, as well as the central cavity 40 and the multiple guide blade slots 36.

[0046] 11 depicts an upper elevated perspective view of an alternative embodiment of joint revision device 10A showing the assembled osteotome blade guide block 20 with the adjustable L-shaped upper and lower osteotome blade guide plates 26, 38 fully retracted upward. This view better illustrates the adjustment slots 28 in the upper guide plate 26, which allow the lower guide plate 38 to be repositioned into different slots within the plurality of guide slots 36. In this manner, the lower guide plate 38 can be positioned into any of the slots created within the plurality of guide slots 36, and is therefore adjustable anteriorly (toward the femoral stem implant) and posteriorly (away from the femoral stem implant) to accommodate different sized femoral stem implants removed during the revision surgery.

[0047] 12 depicts a side elevation view of an alternative embodiment of joint revision device 10A showing the assembled osteotome blade guide block 20 with fully retracted, adjustable L-shaped upper osteotome blade guide plate 26 and lower guide plate 38. Here, the retention screw 30 has been rotated to extend outward along threads 42. Retention washer 41 prevents the upper guide plate 26 from returning downward toward the guide block assembly 20. In this manner, the lower guide plate 38 is adjustable upward away from and downward toward the femoral stem implant to accommodate different sized femoral stem implants removed during revision surgery.

[0048] FIG. 13 depicts a front view of an alternative embodiment of a joint revision device 10A showing the assembled osteotome blade guide block 20 with the adjustable L-shaped osteotome blade guide plates 26 and 38 partially retracted upward.

[0049] FIG. 14 depicts a cross-sectional view of an alternative embodiment of the joint revision device 10A, showing the assembled osteotome blade guide block 20 with the adjustable L-shaped osteotome blade lower guide plate 38 and upper guide plate portion 26 fully retracted upward, as seen in FIG. 13. Here, the guide plate retention screw 30 has a fully extended threaded portion 42, and the upper guide plate 26 is retained by a retaining washer 41. The lower guide plate 38 again resides within the distal guide slot portion of the multiple guide slots 36. This cross-sectional view also clearly shows the central cavity 40, trunnion fixation member 44, and locking nut 46, along with the posterior blade guide slot 32 and threaded orifice 34 for receiving an eyebolt (not shown, see FIGS. 23-30). This location, farthest from the medial calcaneus, would accommodate a larger or collared femoral stem implant.

[0050] 15 depicts a cross-sectional view of an alternative embodiment of the joint revision device 10A showing the assembled osteotome blade guide block 20 with the adjustable L-shaped upper and lower osteotome blade guide plates 26 and 38 fully extended downward and positioned in the middle osteotome blade guide slots in the guide block. This view clearly shows that the lower guide plate 38 has been removed and repositioned in one of the middle guide slots in the multiple guide slots 36. This position, mid-distance to the medial calcaneus, should accommodate a mid-sized femoral stem implant.

[0051] 16 depicts a cross-sectional view of an alternative embodiment of joint revision device 10A showing the assembled osteotome blade guide block 20 with the adjustable L-shaped lower osteotome blade guide plate 38 fully retracted upward and positioned in the middle osteotome blade guide slot within the plurality of guide slots 36 integrated into the guide block assembly 700. It also shows the retaining washer 41 that holds the upper guide plate 26 in the upper position.

[0052] 17 depicts a cross-sectional view of an alternative embodiment of a joint revision device 10A showing the assembled osteotome blade guide block 20 with the adjustable L-shaped upper and lower osteotome blade guide plates 706 and 38 extended fully downward and positioned in the osteotome blade guide slot closest to the central cavity 40 in the guide block. This view clearly shows that the lower guide plate 38 has been removed and repositioned in the guide slot closest to the central cavity 40, thereby now positioned closest to the femoral stem implant that will be removed during the revision surgery. This position, closest to the medial calcaneus, should accommodate a smaller femoral stem implant.

[0053] 18 depicts a cross-sectional view of an alternative embodiment of the joint revision device 10A showing the assembled osteotome blade guide block 20 with the adjustable L-shaped lower osteotome blade guide plate 38 fully retracted upward and positioned in the middle osteotome blade guide slot within the plurality of guide slots 36 integrated into the guide block assembly 20. FIG. 18 also shows the retaining washer 41 that holds the upper guide plate 26 in the upward position. This fully retracted position, closest to the medial calcaneus, should accommodate small to medium-sized femoral stem implants.

[0054] 19 depicts a side elevation view of stem trunnion fixation piece 80 having threaded portion 82 and groove 84 running the length of threaded portion 82. Stem trunnion fixation piece 80 is conical in shape and tapers from a larger diameter to a smaller diameter toward threaded portion 82. Groove 84 is used to mount and orient stem trunnion fixation piece 80 within central cavity 40 of assembly 20 and, once mounted therein, to prevent stem trunnion fixation piece 80 from rotating during revision surgery.

[0055] FIG. 20 depicts a cross-sectional view of the stem trunnion locking piece 80 as shown in FIG. 19. The stem trunnion locking piece 80 has a partially hollow body 88 with a ribbed interior 86 running approximately halfway down the length of the threaded portion 82, from a larger diameter to a smaller diameter. Within the outer body 88 of the stem trunnion locking piece 80 is the ribbed interior 86 with a plurality of annular ribs 90 thereon. The ribbed interior 86 is slidably affixed to the outer body. The ribbed interior 90 within the hollow portion 86 also has an external slot (not shown, see FIG. 101 below). When the nut 46 is placed over the threaded portion 82 and tightened, this moves the internal rib portion 86 up the outer body 88 of the stem trunnion locking piece 80, reducing the overall diameter of the internal rib portion 86 and thereby tightening the stem trunnion locking piece 80 around the stem trunnion 132 (see FIG. 24). See below for a further description of this operation.

[0056] FIG. 21 depicts a bottom view of the stem trunnion locking piece 80, showing the outer body 88 and internal rib 90 within the hollow portion 86. The four slots 92, 94, 96, and 98 are positioned 90 degrees from one another about the ribbed interior 86. In operation, the stem trunnion locking piece 80 rests on the stem trunnion 132, and the annular ribs 90 contact the stem trunnion 132 at the top. When the nut 46 is placed on the threaded portion 82 and tightened, this tightens the stem trunnion locking piece 80 about the stem trunnion 132 by moving the internal rib up the outer body 88 and reducing the overall diameter of the ribbed interior 86 about the stem trunnion. As the nut 46 is tightened and the internal rib 86 moves relative to the outer body 88, the four slots 92, 94, 96, and 98 tighten together, reducing the slot gap distance. This effectively tightens and securely fastens the stem trunnion retaining piece 80 to the stem trunnion 132. Once secured, the stem trunnion 80 cannot be released from the stem trunnion retaining piece 80 until the nut 46 is loosened and the diameter of the ribbed interior 86 is increased to its original size. The nut 46 can be tightened and loosened using a standard wrench, such as a 10 mm box wrench.

[0057] FIG. 22 depicts a side perspective view of stem trunnion locking piece 80 showing threaded portion 82 having slots 84 therein and internal ribbed portion 86 having four slots therein, with one slot 94 shown here labeled by a reference letter. It is anticipated that various sizes of stem trunnion locking pieces 80 will be available to accommodate various sizes of stem trunnions to be extracted. Different sizes of stem trunnion locking piece 80 are easily installed by placing the stem trunnion locking piece 80 into central cavity 40 and then securing it in place using nut 46. In this manner, stem trunnion locking piece 80 is replaceable and reusable once nut 46 is loosened and the stem is loosened after extracting stem trunnion 132.

[0058] 23 depicts an exploded view of an alternative embodiment of the joint revision device 10A showing the disassembled osteotome blade guide block assembly 20 with adjustable L-shaped osteotome blade guide plates 26 and 38, illustrating its use during the revision surgery 100 with respect to the relative positions of the medial calcaneal osteotome blade 116 and the posterior osteotome blade 122 prior to insertion into the anterior osteotome blade guide slot 36 and the posterior osteotome blade guide slot 32 within the guide block assembly 20, as well as their relative positions to the femoral stem implant 130 and femoral stem implant trunnion portion 132. Assembly of the two half portions 22 and 24 is achieved using Allen screws 52, 54, 56, and 58 along with alignment pins 60 and 62. Also shown is the eyebolt 50 and the female-threaded orifice 34 for receiving the male-threaded eyebolt 50. The medial calcaneal blade 116 includes a blade shaft 114 that is attached to a handle adapter 112 that can be fastened to the handle 110. The posterior blade 122 includes a blade shaft 120.

[0059] FIG. 24 depicts a cross-sectional view of an alternative embodiment of a joint revision surgery device 10A showing the assembled osteotome blade guide block 20 with an adjustable L-shaped osteotome blade guide plate in use during a revision surgery 100, showing surgical osteotome blades 116 and 122 inserted into the anterior 36 and posterior 32 osteotome blade guide slots within the assembled guide block 20 for removing a collarless implanted femoral stem 130. Note that the lower guide plate 38 is inserted into the farthest-most guide slot (away from the femoral stem implant) within the plurality of guide slots 36. Note also that the guide plate adjustment screw 30 is fully threaded into the block so that the lower guide plate 38 is farthest from the femoral stem implant being removed. The trunnion fixation member 44 is securely fastened to the trunnion portion 132 of the stem 130. The posterior blade shaft 120 and cutting blade 122 extend downward through the posterior guide slot 32 to cut the posterior portion of the collarless implanted femoral stem 130. The medial calcaneus blade 116 runs downward through the guide slots 36 and is guided by the position of the guide plate lower portion 38. The blade 116 contacts the collarless implanted femoral stem 130. This Figure 24 illustrates steps 1-4 of the procedure for a revision femoral stem implant removal: step 1 is adjusting the guide plate height and slot position for the type and size of femoral stem implant to be removed; step 2 is securing the trunnion portion 132 to the trunnion fixation member 44; step 3 is inserting the anterior cutting blade through the posterior blade guide slot 32; and step 4 is inserting the posterior or anterior cutting blade 122 after all adjustments have been made to the guide plate, followed by the beginning of insertion of the medial calcaneus blade 116. In this way, proper adjustments are made to accommodate the size and shape of the femoral stem implant 130 that will be removed during the next step of the revision procedure using the guide block assembly 20 of the joint revision device 10A.

[0060] 25 depicts a cross-sectional view of an alternative embodiment of joint revision device 10A showing the assembled osteotome blade guide block 20 with adjustable L-shaped osteotome blade guide plates 26 and 38 in use during revision surgery 100, showing surgical osteotome blades 116 and 122 inserted into the anterior 36 and posterior 32 osteotome blade guide slots within the assembled guide block 20 for removing a collarless implanted femoral stem. This FIG. 25 represents step 5 of the procedure for revision surgery to remove a femoral stem implant, i.e., step 5 is inserting the medial calcaneal cutting blade 116 until it contacts the femoral stem implant 130 to be removed.

[0061] 26 depicts a cross-sectional view of an alternative embodiment of the joint revision apparatus 10A showing the assembled osteotome blade guide block 20 with adjustable L-shaped osteotome blade guide plates 26 and 38 in use during a revision surgery 100, showing the surgical osteotome blades 116 and 122 inserted into the anterior 36 and posterior 32 osteotome blade guide slots within the assembled guide block 700 for removing a collarless implanted femoral stem. This FIG. 26 represents step 6 of the procedure for the revision surgery to remove a collarless implanted femoral stem 130, which is to continue to compress and move the medial calcaneal cutting blade 116 downward until it advances past the point where it begins to contact the femoral stem implant 130 to be removed and begins to separate the femoral stem implant from the femur. Note that in this Figure 26, the L-shaped guide plates 26 and 38 are positioned in the guide slots furthest from the femoral stem implant 130. Note also that the guide plate lower portion 38 is secured at its lowest possible point, closest to the femoral stem implant 130 that will be removed during the revision surgery.

[0062] 27 depicts a cross-sectional view of an alternative embodiment of the joint revision apparatus 10A showing the assembled osteotome blade guide block 20 with adjustable L-shaped osteotome blade guide plates 26 and 38 in use during a revision surgery 100, showing the surgical osteotome blades 116 and 122 inserted into the anterior 36 and posterior 32 osteotome blade guide slots in the assembled guide block 20 for removing a collarless implanted femoral stem. This FIG. 27 also represents step 6 of the procedure for the revision surgery to remove a femoral stem implant 130, which is to continue to compress and move the medial calcaneal cutting blade 116 downward until it advances past the point where it begins to contact the femoral stem implant 130 to be removed and begins to separate the femoral stem implant from the femur. 27, the L-shaped guide plates 26 and 38 are positioned within the guide slots closest to the collarless femoral stem implant 130. Also note that the guide plate lower portion 38 is secured in a slightly elevated position relative to its lowest possible point, slightly away from the collarless femoral stem implant 130, which will be removed during the revision surgery.

[0063] 28 depicts a cross-sectional view of an alternative embodiment of the joint revision apparatus 10A showing the assembled osteotome blade guide block 20 with adjustable L-shaped osteotome blade guide plates 26 and 38 in use during a revision surgery 100, showing the surgical osteotome blades 116 and 122 inserted into the anterior 36 and posterior 32 osteotome blade guide slots in the assembled guide block 20 for removing a collarless implanted femoral stem. This FIG. 28 also represents step 6 of the procedure for the revision surgery to remove a femoral stem implant 130, which is to continue to compress and move the medial calcaneal cutting blade 116 downward until it advances past the point where it begins to contact the femoral stem implant 130 to be removed and begins to separate the femoral stem implant from the femur. Note that in this Figure 28, the L-shaped guide plates 26 and 38 are positioned in the guide slots closest to the femoral stem implant 130. This view better shows the retaining washer 41 used to keep the upper guide plate 26 from lifting when the adjustment plate retaining screw 30 is raised. Also note that the lower guide plate 38 is secured in a more elevated position relative to its lowest possible point, slightly away from the femoral stem implant 130, which will be removed during the revision surgery.

[0064] FIG. 29 depicts a cross-sectional view of an alternative embodiment of the joint revision device 10A, showing the assembled osteotome blade guide block 20 with adjustable L-shaped osteotome blade guide plates 26 and 38 in use during a revision surgery 140, showing surgical osteotome blades 116 and 122 inserted into the anterior 36 and posterior 32 osteotome blade guide slots within the assembled guide block 20 for removing a collared implanted femoral stem 142, including a collar 146. A femoral stem trunnion portion 144 is secured to the trunnion fixation member 44. This FIG. 29 depicts step 5 of the procedure for revision removal of a collared femoral stem implant, i.e., inserting the medial calcaneal cutting blade 116 until it begins to contact the collared femoral stem implant 140 to be removed, where the collar 146 has been bypassed on the collared stem 142. 29, note that the L-shaped guide plates 26 and 38 are positioned within the middle guide slots of the guide slots 26 at a medial distance from the collared femoral stem implant 142. Also note that the adjusting plate retaining screw 30 is slightly elevated, allowing the lower guide plate 38 to guide the cutting blade 116 below the collar 146 on the collared stem 142. This view better shows the retaining washer 41 used to keep the upper guide plate 26 from lifting up when the adjusting plate retaining screw 30 is elevated. Also note that the lower guide plate 38 is secured in a more elevated position relative to its lowest possible point, slightly away from the femoral stem implant 142 that will be removed during the revision surgery.

[0065] 30 depicts a cross-sectional view of an alternative embodiment of a joint revision device 10A showing the assembled osteotome blade guide block 20 with adjustable L-shaped osteotome blade guide plates 26 and 38 in use during a revision surgery 140, showing surgical osteotome blades 116 and 122 inserted into the anterior 36 and posterior 32 osteotome blade guide slots in the assembled guide block 20 for removing a collared implanted femoral stem 142. A collared femoral stem trunnion portion 144 is secured to the trunnion fixation member 44. FIG. 30 also represents step 6 of the procedure for the revision surgery to remove a collared femoral stem implant 142, which continues to compress and move the medial calcaneal cutting blade 116 downward until it advances past the point where it begins to contact the collared femoral stem implant 142 to be removed and begins to separate the collared femoral stem implant 142 from the femur. Note that in FIG. 30, the L-shaped guide plates 26 and 38 are positioned within the guide slots closest to the collared femoral stem implant 142. Note that the guide plate lower portion 38 is secured in a more elevated position relative to its lowest possible point, slightly removed from the collared femoral stem implant 142 to be removed during the revision surgery. This allows the guide plate 38 to guide the cutting blade 116 through the collar 146 on the collared stem 142. These two aforementioned two-way distance adjustments allow the guide block 20 to be used with various sizes of collared (shown here in Figures 29 and 30) and collarless femoral stem implants (shown previously in Figures 24-28).

[0066] FIG. 31 depicts a top view of a heavy compound curved prosthetic blade 148 with a curved pointed tip 150 and a metal end cap 152 .

[0067] FIG. 32 depicts a side view of the heavy compound curved prosthetic blade 148 shown in FIG. 31 having a curved pointed tip 150 and a metal end cap 152.

[0068] FIG. 33 depicts a top view of a thin composite curved prosthetic blade 156 with a curved, sharp point 158 ​​and a metal end cap 154 ​​.

[0069] FIG. 34 depicts a side view of the thin composite curved prosthetic blade 156 shown in FIG. 33 having a curved, pointed tip 158 and a metal end cap 154.

[0070] FIG. 35 depicts a top view of a straight, narrow, flat blade 162 with a chisel-shaped pointed end 164 and a metal end cap 160.

[0071] FIG. 36 depicts a top view of a straight, wide, flat blade 168 with a triangular shaped sharp pointed end 170 and a metal end cap 166.

[0072] FIG. 37 depicts a side view of a thin, compound curved prosthetic blade 176 with a straight handle 174 and a metal end cap 172 having a compound curved, pointed cutting edge 178.

[0073] 38 depicts a side view of a two-piece handle 180 and a thin, compound curved prosthetic blade 184, here with a metal end cap 182, enclosed within the two-piece handle 180. The thin, compound curved prosthetic blade 184 has a compound curved, pointed cutting edge 186.

[0074] 39 depicts a top elevated perspective view of a surgical sliding hammer assembly 200 that can be attached to an assembled surgical osteotome blade guide block (not shown). The sliding hammer assembly 200 includes a sliding hammer handle 202 having a sliding hammer handle upper surface 204 and a sliding hammer handle lower surface 206. The sliding hammer handle 202 moves up and down on a handle shaft having a sliding hammer handle lower shaft portion 208 and a sliding hammer handle upper shaft portion 210. At the end of the sliding hammer handle lower shaft portion 208 is a threaded attachment nut 214, which is wider in diameter than the sliding hammer handle lower shaft portion 208. Similarly, atop the sliding hammer handle upper shaft portion 210 is a sliding hammer striker cap 212, which is also wider in diameter than the sliding hammer handle upper shaft portion 210.

[0075] 40 depicts a top plan view of a surgical sliding hammer assembly 200 that can be attached to an assembled surgical osteotome blade guide block (not shown). In this top plan view of the sliding hammer assembly 200, the sliding hammer handle 202 and the sliding hammer strike cap 212 can be seen.

[0076] 41 depicts a side elevation view of a surgical sliding hammer assembly 200 that can be attached to an assembled surgical osteotome blade guide block (not shown). In this top plan view of the sliding hammer assembly 200, the sliding hammer handle 202 and the sliding hammer threaded attachment nut 214 can be seen.

[0077] FIG. 42 depicts a bottom view of a surgical sliding hammer assembly 200 that can be attached to an assembled surgical osteotome blade guide block (not shown). The sliding hammer assembly 200 includes a sliding hammer handle 202 having a sliding hammer handle upper surface 204 and a sliding hammer handle lower surface 206. The sliding hammer handle 202 moves up and down on a handle shaft having a sliding hammer handle lower shaft 208 and a sliding hammer handle upper shaft 210. At the end of the sliding hammer handle lower shaft 208 is a threaded attachment nut 214, which is wider in diameter than the sliding hammer handle lower shaft 208. Similarly, atop the sliding hammer handle upper shaft 210 is a sliding hammer striker cap 212, which is also wider in diameter than the sliding hammer handle upper shaft 210.

[0078] FIG. 43 depicts a rotated side elevation view rotated 90 degrees of a surgical sliding hammer assembly 200 that can be attached to the assembled surgical osteotome blade guide block shown in FIG. 41. Again, the sliding hammer assembly 200 includes a sliding hammer handle 202 having a sliding hammer handle upper surface 204 and a sliding hammer handle lower surface 206. The sliding hammer handle 202 moves up and down on a handle shaft having a sliding hammer handle lower shaft portion 208 and a sliding hammer handle upper shaft portion 210. At the end of the sliding hammer handle lower shaft portion 208 is a threaded attachment nut 214, which is wider in diameter than the sliding hammer handle lower shaft portion 208. Similarly, atop the sliding hammer handle upper shaft portion 210 is a sliding hammer strike cap 212. This sliding hammer impact cap 212 also has a wider diameter than the sliding hammer handle shaft upper portion 210 .

[0079] 44 depicts a top elevated perspective view of a surgical sliding hammer assembly 200, here shown attached to the assembled osteotome blade guide block 20. A male threaded mounting nut 214 is threaded into the female threaded orifice 34 located on the top surface of the assembled surgical osteotome blade guide block 20 (see FIG. 47).

[0080] 45 depicts a side elevational view of the surgical sliding hammer assembly 200, which is attachable to an assembled osteotome blade guide block, here shown attached to the assembled surgical osteotome blade guide block 20. The male threaded attachment nut 214 is threaded into the female threaded orifice 34 located on the top surface of the assembled surgical osteotome blade guide block 20. In operation, the male threaded attachment nut 214 is threaded into the female threaded orifice 34 of the guide block 20, and then the handle is moved upward (see moving arrow) to strike the sliding hammer strike cap 212 to extract the implant 130 attached to the guide block assembly 20.

[0081] 46 depicts a rear view of the surgical sliding hammer assembly 200, which is attachable to an assembled osteotome blade guide block, shown here attached to the assembled surgical osteotome blade guide block 20. The male threaded attachment nut 214 is threaded into the female threaded orifice 34 located on the top surface of the assembled surgical osteotome blade guide block 20. In operation, the male threaded attachment nut 214 is threaded into the female threaded orifice 34 of the guide block 20, and then the handle is moved upward to strike the sliding hammer strike cap 212 to extract the implant 130 attached to the guide block assembly 20.

[0082] Figure 47 depicts a cross-sectional view of a surgical sliding hammer assembly 200 that can be attached to an assembled osteotome blade guide block 20, here shown attached to the assembled surgical osteotome blade guide block 20 of Figure 46. In this cross-sectional view, the male threaded attachment nut 214 is threaded into the female threaded orifice 34 located on the top surface of the assembled surgical osteotome blade guide block 20. Once attached, the sliding hammer handle 202 slides upward and impacts the end cap 212, providing momentum to pull the stem trunnion fixation member 44 affixed to the guide block 20 and implant 130 up and out of the femur during the revision surgery.

[0083] 48 depicts a bottom view of a surgical sliding hammer assembly 200 that can be attached to an assembled osteotome blade guide block 20, shown here attached to the assembled osteotome blade guide block 20. This bottom view shows in more detail the sliding hammer handle 202 and the guide block 20 with rear guide slot 32 as well as upper and lower guide plates 26 and 38.

[0084] 49 depicts a top elevated perspective view of the surgical sliding hammer assembly 200, here shown attached to the assembled osteotome blade guide block 20. This view more clearly shows the guide block 20 in greater detail, showing the attached sliding hammer mating nut 214 and trunnion locking member 44, and lower guide plate 38, as well as the sliding hammer handle 202 and impact end cap 212.

[0085] 50 depicts a top plan view of a surgical sliding hammer assembly 200 that can be attached to an assembled osteotome blade guide block 20, shown here attached to the assembled osteotome blade guide block 20. This top plan view more clearly shows the guide block 20 in greater detail, showing the sliding hammer handle 202 and impact end cap 212, as well as the adjustment screw 30 and trunnion fixation member 44.

[0086] 51 depicts a side elevational view of the surgical sliding hammer assembly 200, here shown attached to the assembled osteotome blade guide block 20. This view more clearly shows the sliding hammer handle 202 and strike end cap 212, as well as the attached sliding hammer threaded nut 214 and trunnion fixation member 44, and the guide block 20 in greater detail showing the lower guide plate 38. In operation, the male threaded attachment nut 214 is threaded into the female threaded orifice 34 of the guide block 20, and the handle is then moved upward (see moving arrow) to strike the sliding hammer strike cap 212 to extract the implant 130 attached to the guide block assembly 20. Thus, once attached, the sliding hammer handle 202 slides upward and impacts the end cap 212, using momentum to pull the stem trunnion fixation member 44 affixed to the guide block 20 and implant 130 up and out of the femur during the revision surgery.

[0087] 52 depicts a top elevated perspective view of the osteotome handle assembly 220 for locking a surgical blade, showing the locking lever 230 in an outwardly locked or open position with a surgical osteotome blade 238 inserted therein and securing the surgical osteotome blade therein in the open position. The osteotome handle assembly 220 for locking a surgical blade includes a handle 222 having a lower impact end 224 and two-piece locking chambers, consisting of a lower locking chamber 226 and an upper locking chamber 228. The locking chamber houses a locking lever 230, which is inserted into a locking lever slot 232. The locking chamber portions 226 and 228 are retained to the handle using two retaining screws 234 and 236. 52, an osteotome blade 238 having a cutting edge 240 is inserted into the locking handle assembly 220, and the locking lever 230 is in an outwardly locked position securing the surgical osteotome blade therein in the open position. To disengage the osteotome blade 238 within the locking chambers 226 and 228, the locking lever 230 must be pushed inward to a closed or disengaged position to insert or remove the osteotome blade 238 (see FIGS. 54-58).

[0088] 53 depicts a bottom elevated perspective view of the osteotome handle assembly 220 for locking a surgical blade, showing the locking lever 230 in an outwardly locked or open position, with a surgical osteotome blade 238 inserted therein and securing the surgical osteotome blade therein in the open position. The osteotome handle assembly 220 for locking a surgical blade includes a handle 222 having a lower impact end 224 and a two-piece locking chamber consisting of a lower locking chamber 226 and an upper locking chamber 228. The locking chamber houses a locking lever 230, which is inserted into a locking lever slot 232. The locking chamber portions 226 and 228 are retained to the handle using two retaining screws 234 and 236. 53, an osteotome blade 238 having a cutting edge 240 is inserted into the locking handle assembly 220, and the locking lever 230 is in an outwardly opened or locked position, allowing the osteotome blade 238 to be secured within the handle. To disengage the osteotome blade 238 within the locking chambers 226 and 228, the locking lever 230 must be pushed inward, thereby releasing the surgical osteotome blade (see FIGS. 54-58). In this manner, various surgical osteotome blades can be easily removed and replaced within the handle 220 and then locked in place for various surgical procedures.

[0089] 54 depicts a top elevated perspective view of the osteotome-handle assembly 220 for locking a surgical blade, showing the locking lever 230 pushed inward to a disengaged position with a surgical osteotome blade 238 inserted therein, which should allow for insertion and removal of the surgical osteotome blade. Here, as shown, the locking lever 230 is inserted into the locking lever slot 232. In this manner, the osteotome blade 238 is disengaged within the handle 222 for subsequent insertion and removal as needed for use in a surgical procedure.

[0090] FIG. 55 depicts a top-elevation perspective exploded view of the osteotome handle assembly 220 for locking a surgical blade, showing the locking lever 230 pushed inward to a disengaged position with a surgical osteotome blade 238 inserted therein, which should allow for insertion and removal of the surgical osteotome blade. This exploded view shows details of the inner workings of the locking handle 220. Two locking chamber components 226 and 228 house the locking lever 230 and a locking lever spring 244 that rests in a locking lever spring groove 248 machined and integrated into the lower chamber half 228. The locking lever 230 includes a frame that defines a central opening that bears against the locking lever spring 244 when assembled. The handle 222 has an upper surface 252, a mounting post 250, and retention screw orifices 254 and 256. The mounting post includes a groove 258 into which an osteotome blade can be inserted and locked in place by the locking lever 230 when the locking lever 230 is in an outwardly open position (fully open). In operation, the osteotome blade 238 includes a locking slot 242 that is securely held in place by the locking lever 230 when the locking lever 230 is in an outward or fully open position of the locking slot 232 formed by the two-part locking chambers 226 and 228. The locking lever 230 is compressed by the locking lever spring 244 and remains in the outward, locked position due to the pressure exerted by the locking lever spring 244 during surgical use.

[0091] FIG. 56 depicts a bottom elevated perspective exploded view of the osteotome handle assembly for locking a surgical blade, showing the lock lever 230 in an inwardly pushed, disengaged position with a surgical osteotome blade inserted therein, which should allow for insertion and removal of the surgical osteotome blade. This exploded view also details the internal workings of the lock handle 220. Two locking chamber components 226 and 228 house the lock lever 230 and a lock lever spring 244 that rests in a lock lever spring groove 248 machined and integrated into the lower chamber half 228. The lock lever 230 includes a frame that defines a central opening that bears against the lock lever spring 244 when assembled. The handle 222 has an upper surface 252, a mounting post 250, and retention screw orifices 254 and 256. The mounting post includes a groove 258 into which an osteotome blade can be inserted and locked in place by the locking lever 230 when the locking lever 230 is in an outwardly open position (fully open). In operation, the osteotome blade 238 includes a locking slot 242 that is securely held in place by the locking lever 230 when the locking lever 230 is in an outward or fully open position of the locking slot 232 formed by the two-part locking chambers 226 and 228. The locking lever 230 is compressed by the locking lever spring 244 and remains in the outward, locked position due to the pressure exerted by the locking lever spring 244 during surgical use.

[0092] FIG. 57 depicts a front view of the osteotome-handle assembly 220 for locking the surgical blade, with a surgical osteotome blade 238 inserted therein, showing the locking lever (not visible in this view) in an inwardly pushed or disengaged position (not shown) which should allow the surgical osteotome blade to be inserted and removed.

[0093] 58 depicts a side elevation view of the osteotome-handle assembly 220 for locking a surgical blade, showing the locking lever 230 in an inwardly pushed, disengaged position, which should have a surgical osteotome blade 238 inserted therein and should allow the surgical osteotome blade to be inserted and removed. In operation, the locking lever 230 should be pushed, the blade should be removed and / or inserted, and then the pressure of the locking lever spring 244 should allow the locking lever 230 to automatically return to the locked or outward position. In this manner, the osteotome blade 238 is locked within the handle 222 in its normal locked configuration (locking lever is fully open), and then the locking lever 230 is pushed inward to disengage the surgical blade for subsequent insertion and removal for use in a surgical procedure as needed. Thus, the surgical osteotome blade is easily removed and replaced using the osteotome handle assembly 220 to lock the surgical blade as needed by the stage or surgeon during the surgical procedure.

[0094] 59 depicts a top plan view of the osteotome handle assembly 220 for locking a surgical blade, showing the locking lever 230 in the open or locked position with the surgical osteotome blade 240 inserted therein. Thus, the mounting post 250 and the open-positioned locking lever 230 are clearly visible, as are the retention screws 234 and 236.

[0095] 60 depicts a bottom view of the osteotome-handle assembly 220, which has a surgical osteotome blade (not visible here) inserted therein, and in this view, the striking base 224 of the handle 222 is clearly visible. In operation, the handle 222 can be used to insert a surgical osteotome blade to cut bone, and the striking end 224 can be manually struck by hand or with a surgical hammer to allow the surgeon to more easily and quickly cut the bone when it is difficult to cut.

[0096] FIG. 61 depicts a front view of the surgical blade locking osteotome handle assembly 220 having a surgical osteotome blade 238 inserted therein.

[0097] FIG. 62 depicts a cross-sectional view of the osteotome handle assembly 220 for locking a surgical blade, as shown in FIG. 61, with a surgical osteotome blade 238 inserted therein. In this cross-sectional view, the mounting post 250 with the lower locking chamber half 226 and the upper locking chamber half 228 assembled thereon is seen. The two halves 226 and 228 define a groove in which the locking lever spring 244 rests. The locking lever 230 is shown with the locking lever spring 244 urging the locking lever 230 into an open or locked position. When the locking lever 230 is in the open or locked position, the locking lever 230 locks the blade end into the handle by contacting a slot in the surgical blade locking plate (described below).

[0098] Figure 63 depicts a top view of the osteotome-handle assembly 220 for locking a surgical blade, showing the locking lever 230 in a depressed, inward, or disengaged position, with a surgical osteotome blade 238 inserted therein. When the locking lever 230 is in this depressed, or disengaged, position, the surgical osteotome blade 238 is easily inserted and removed. This view is similar to that of Figure 59, and it shows the same parts as those shown in Figure 59 (see Figure 59).

[0099] Figure 64 depicts a front view of the osteotome-handle assembly 220 for locking a surgical blade, showing the locking lever 230 in a depressed, inward, or disengaged position, with a surgical osteotome blade 238 inserted therein. When the locking lever 230 is in this depressed, or disengaged, position, the surgical osteotome blade 238 is easily inserted and removed. This view is similar to that of Figure 61, which shows the same parts as those shown in Figure 61 (see Figure 61).

[0100] Figure 65 depicts a bottom view of the osteotome-handle assembly 220 for locking a surgical blade, showing the locking lever 230 in a depressed, inward, or disengaged position, with a surgical osteotome blade 238 inserted therein. When the locking lever 230 is in this depressed, or disengaged, position, the surgical osteotome blade 238 is easily inserted and removed. This view is similar to that of Figure 60, which shows the same parts as those shown in Figure 60 (see Figure 60).

[0101] Figure 66 depicts a side elevational view of the osteotome-handle assembly 220 for locking a surgical blade, showing the locking lever 230 in a depressed, inward, or disengaged position, with a surgical osteotome blade 238 inserted therein. When the locking lever 230 is in this depressed, or disengaged, position, the surgical osteotome blade 238 is easily inserted and removed. This view is similar to the view of Figure 58, but is in the opposite direction from Figure 58, and shows the same parts as those shown in Figure 58 (see Figure 58).

[0102] 67 depicts a rear view of the surgical blade-locking osteotome handle assembly 220 with a surgical osteotome blade 238 inserted therein, here shown attached to the surgical osteotome blade guide block assembly 20. In this view, the surgical osteotome blade guide block assembly 20 is attached to the implant 130 and is used to guide the surgical osteotome blade 238 down through the guide block rear guide slot (see FIG. 68 for more details) to separate the shoulder of the implant 130 from the bone (not shown).

[0103] FIG. 68 depicts a cross-sectional side elevation view of the surgical blade-locking osteotome handle assembly 220 with a surgical osteotome blade 238 inserted therein, here shown attached to the surgical osteotome blade guide block assembly 20 as shown in FIG. 67. Recall that the surgical osteotome blade guide block assembly 20 includes the lower guide plate 38, the guide plate adjustment screw 30, and the trunnion fixation member 44, which is securely held to the surgical osteotome blade guide block assembly 20 by a nut 46. The multiple posterior guide slots 32 are also clearly visible here. Based on the size of the implant 130, the surgeon selects a single slot among the multiple posterior guide slots 32 for the blade 238 to extend downwardly, and the blade 238 is secured to the handle 222 with the locking lever 230 in the outward or locked position. In this manner, the lateral shoulder of the implant 130 is separated from the bone (not shown) for release in a revision procedure. The use of the osteotome blade 238 secured within the handle assembly 220, combined with extending the blade 238 downward through the guide block to make the cut, significantly improves patient outcomes by making revision procedures highly efficient and time-saving.

[0104] 69 depicts a top elevated perspective view of a flexible medial calcaneal osteotome blade 260 having a spoon-shaped cutting edge 262. The flexible medial calcaneal osteotome blade 260 having a spoon-shaped cutting edge 262 also includes the following features: a blade shaft 264 and a blade insert plate 266 distal to the spoon-shaped cutting edge 262. The blade insert plate 266 defines one or more blade locking slots 268 therein. These blade locking slots 268 allow the flexible medial calcaneal osteotome blade 260 having a spoon-shaped cutting edge 262 to be securely locked to the osteotome-handle assembly 220 (see details above), which locks surgical blades. The spoon-shaped cutting edge 262 is both flexible and includes a uniquely designed curvature with a pointed, spoon-shaped cutting edge to more efficiently cut the medial calcaneal implant surface from the bone. What is the difference between a surgical chisel and an osteotome blade? An osteotome is an orthopedic instrument typically used to cut bone. A surgical chisel is used to shape bone. Functionally, the primary difference is that a chisel has one beveled edge, while an osteotome has two beveled edges. Additionally, the flexible medial calcaneal osteotome blade 260 with the spoon-shaped cutting edge 262 can be configured to be an osteotome blade with two beveled, sharp cutting edges, or a surgical chisel with only one beveled sharp cutting edge. 69, a flexible medial calcaneal osteotome blade 260 is shown having a spoon-shaped cutting edge 262 with a beveled chisel cutting edge on only one side. It is anticipated that the flexible medial calcaneal osteotome blade 260 can be configured with the same spoon-shaped cutting edge 262 as osteotome blades with beveled pointed cutting edges on both sides.

[0105] 70 depicts a front view of a flexible medial calcaneal osteotome blade 260 having a spoon-shaped cutting edge 262. The flexible medial calcaneal osteotome blade 260 having a spoon-shaped cutting edge 262 also includes the following features: a blade shaft 264 and a blade insertion plate 266 distal to the spoon-shaped cutting edge 262. The blade insertion plate 266 defines one or more blade locking slots 268 therein. These blade locking slots 268 allow the flexible medial calcaneal osteotome blade 260 having a spoon-shaped cutting edge 262 to be securely locked to the osteotome-handle assembly 220 (see details above), which locks surgical blades. The spoon-shaped cutting edge 262 is both flexible and includes a uniquely designed curvature with a sharpened spoon-shaped cutting edge to more efficiently cut the medial calcaneal implant surface from the bone.

[0106] 71 depicts a cross-sectional view of the flexible medial calcaneal osteotome blade 260 having a spoon-shaped cutting edge 262, as shown in FIG. 70. The flexible medial calcaneal osteotome blade 260 having a spoon-shaped cutting edge 262 also includes the following features: a blade shaft 264 and a blade insertion plate 266 distal to the spoon-shaped cutting edge 262. The blade insertion plate 266 defines one or more blade locking slots 268 therein. These blade locking slots 268 allow the flexible medial calcaneal osteotome blade 260 having a spoon-shaped cutting edge 262 to be securely locked to the osteotome-handle assembly 220 (see details above), which locks surgical blades. The spoon-shaped cutting edge 262 is both flexible and includes a uniquely designed curvature with a sharpened spoon-shaped cutting edge to more efficiently cut the medial calcaneal implant surface from the bone.

[0107] FIG. 72 depicts a top plan view of a flexible medial calcaneal osteotome blade 260 having a spoon-shaped cutting edge 262 and a blade insert plate 266 .

[0108] FIG. 73 depicts a bottom view of a flexible medial calcaneal osteotome blade 260 having a spoon-shaped cutting edge 262 and a blade insert plate 266 .

[0109] 74 depicts a rear view of a flexible medial calcaneal osteotome blade 260 having a spoon-shaped cutting edge 262. The flexible medial calcaneal osteotome blade 260 having a spoon-shaped cutting edge 262 also includes the following features: a blade shaft 264 and a blade insertion plate 266 distal to the spoon-shaped cutting edge 262. The blade insertion plate 266 defines one or more blade locking slots 268 therein. These blade locking slots 268 allow the flexible medial calcaneal osteotome blade 260 having a spoon-shaped cutting edge 262 to be securely locked to the osteotome-handle assembly 220 (see details above), which locks surgical blades. The spoon-shaped cutting edge 262 is both flexible and includes a uniquely designed curvature with a sharpened spoon-shaped cutting edge to more efficiently cut the medial calcaneal implant surface from the bone.

[0110] 75 depicts a left side elevational view of a flexible medial calcaneal osteotome blade 260 having a spoon-shaped cutting edge 262. The flexible medial calcaneal osteotome blade 260 having a spoon-shaped cutting edge 262 also includes the following features: a blade shaft 264 and a blade insert plate 266 distal to the spoon-shaped cutting edge 262. The blade insert plate 266 defines one or more blade locking slots 268 therein. These blade locking slots 268 allow the flexible medial calcaneal osteotome blade 260 having a spoon-shaped cutting edge 262 to be securely locked to the osteotome-handle assembly 220 (see details above), which locks surgical blades. The spoon-shaped cutting edge 262 is both flexible and includes a uniquely designed curvature with a sharpened spoon-shaped cutting edge to more efficiently cut the medial calcaneal implant surface from the bone.

[0111] 76 depicts a front view of a flexible medial calcaneal osteotome blade 260 having a spoon-shaped cutting edge 262. The flexible medial calcaneal osteotome blade 260 having a spoon-shaped cutting edge 262 also includes the following features: a blade shaft 264 and a blade insertion plate 266 distal to the spoon-shaped cutting edge 262. The blade insertion plate 266 defines one or more blade locking slots 268 therein. These blade locking slots 268 allow the flexible medial calcaneal osteotome blade 260 having a spoon-shaped cutting edge 262 to be securely locked to the osteotome-handle assembly 220 (see details above), which locks surgical blades. The spoon-shaped cutting edge 262 is both flexible and includes a uniquely designed curvature with a sharpened spoon-shaped cutting edge to more efficiently cut the medial calcaneal implant surface from the bone.

[0112] 77 depicts a right-side elevational view, opposite that of FIG. 75, of a flexible medial calcaneal osteotome blade 260 having a spoon-shaped cutting edge 262. The flexible medial calcaneal osteotome blade 260 having a spoon-shaped cutting edge 262 also includes the following features: a blade shaft 264 and a blade insertion plate 266 distal to the spoon-shaped cutting edge 262. The blade insertion plate 266 defines one or more blade locking slots 268 therein. These blade locking slots 268 allow the flexible medial calcaneal osteotome blade 260 having a spoon-shaped cutting edge 262 to be securely locked to the osteotome-handle assembly 220 (see details above), which locks the surgical blade. The spoon-shaped cutting edge 262 is both flexible and includes a uniquely designed curvature with a sharpened spoon-shaped cutting edge to more efficiently cut the medial calcaneal implant surface from the bone.

[0113] FIG. 78 depicts a bottom view of an elongated flexible medial calcaneal osteotome blade 270 having a narrower spoon-shaped cutting edge 272 and an elongated blade shaft 274 compared to the flexible medial calcaneal osteotome blade 260 having a spoon-shaped cutting edge 262 and a shorter blade shaft 264 shown in FIGS. 69-77.

[0114] FIG. 79 depicts a top plan view of a flexible medial calcaneal osteotome blade 270 having a narrower spoon-shaped cutting edge 272 and an elongated blade shaft 274 compared to the flexible medial calcaneal osteotome blade 260 having a spoon-shaped cutting edge 262 and a shorter blade shaft 264 shown in FIGS. 69-77.

[0115] Figure 80 depicts a rear view of a flexible medial calcaneal osteotome blade 270 having a narrower spoon-shaped cutting edge 272 and an elongated blade shaft 274 compared to the flexible medial calcaneal osteotome blade 260 having the spoon-shaped cutting edge 262 and shorter blade shaft 264 shown in Figures 69-77. The elongated flexible medial calcaneal osteotome blade 270 having the narrower spoon-shaped cutting edge 272 and elongated blade shaft 274 also includes the following feature: a blade insert plate 276 distal to the elongated blade shaft 274 and the narrower spoon-shaped cutting edge 272. The blade insert plate 276 defines one or more blade locking slots 278 therein. These blade locking slots 278 allow a flexible medial calcaneal osteotome blade 270, which has a spoon-shaped cutting edge 272, to be securely locked to the osteotome-handle assembly 220 (see details above), which locks the surgical blade. The narrower spoon-shaped cutting edge 272 is both flexible and includes a uniquely designed curvature with a pointed spoon-shaped cutting edge to more efficiently cut the medial calcaneal implant surface from the bone. What is the difference between a surgical chisel and an osteotome blade? An osteotome is an orthopedic instrument typically used to cut bone. A surgical chisel is used to shape bone. Functionally, the main difference is that a chisel has one beveled edge, while an osteotome has two beveled edges. Additionally, the flexible medial calcaneus osteotome blade 270 with a spoon-shaped cutting edge 272 can be configured to be an osteotome blade with two beveled sharp cutting edges, or a surgical chisel with only one beveled sharp cutting edge. Shown here in FIG. 80 is a flexible medial calcaneus osteotome blade 270 with a spoon-shaped cutting edge 272 with only one beveled chisel cutting edge. It is anticipated that the flexible medial calcaneus osteotome blade 270 can be configured with a spoon-shaped cutting edge 272, the same as an osteotome blade with beveled sharp cutting edges on both sides. Because the osteotome blade includes the surgical chisel, from this point on, the osteotome blade / front of the surgical chisel will simply be referred to as the osteotome blade.

[0116] Figure 81 depicts a left side elevational view of an elongated flexible medial calcaneal osteotome blade 270 having a narrower spoon-shaped cutting edge 272 and an elongated blade shaft 274 compared to the flexible medial calcaneal osteotome blade 260 having the spoon-shaped cutting edge 262 and shorter blade shaft 264 shown in Figures 69-77. The elongated flexible medial calcaneal osteotome blade 270 having the narrower spoon-shaped cutting edge 272 and elongated blade shaft 274 also includes the following feature: a blade insert plate 276 distal to the elongated blade shaft 274 and the narrower spoon-shaped cutting edge 272. The blade insert plate 276 defines one or more blade locking slots 278 therein.

[0117] Figure 82 depicts a front view of a flexible medial calcaneal osteotome blade 270 having a narrower spoon-shaped cutting edge 272 and an elongated blade shaft 274 compared to the flexible medial calcaneal osteotome blade 260 having the spoon-shaped cutting edge 262 and shorter blade shaft 264 shown in Figures 69-77. The elongated flexible medial calcaneal osteotome blade 270 having the narrower spoon-shaped cutting edge 272 and elongated blade shaft 274 also includes the following feature: a blade insert plate 276 distal to the elongated blade shaft 274 and the narrower spoon-shaped cutting edge 272. The blade insert plate 276 defines one or more blade locking slots 278 therein.

[0118] Figure 83 depicts a right-side elevational view of a flexible medial calcaneal osteotome blade 270 having a narrower spoon-shaped cutting edge 272 and an elongated blade shaft 274 compared to the flexible medial calcaneal osteotome blade 260 having the spoon-shaped cutting edge 262 and shorter blade shaft 264 shown in Figures 69-77. The elongated flexible medial calcaneal osteotome blade 270 having the narrower spoon-shaped cutting edge 272 and elongated blade shaft 274 also includes the following feature: a blade insert plate 276 distal to the elongated blade shaft 274 and the narrower spoon-shaped cutting edge 272. The blade insert plate 276 defines one or more blade locking slots 278 therein.

[0119] Figure 84 depicts a top elevated perspective view of a flexible medial calcaneal osteotome blade 270 having a narrower spoon-shaped cutting edge 272 and an elongated blade shaft 274 compared to the flexible medial calcaneal osteotome blade 260 having a spoon-shaped cutting edge 262 and a shorter blade shaft 264 shown in Figures 69-77. The elongated flexible medial calcaneal osteotome blade 270 having a narrower spoon-shaped cutting edge 272 and an elongated blade shaft 274 also includes the same components as those previously shown in Figures 78-83.

[0120] Figure 85 depicts a front view of a flexible medial calcaneal osteotome blade 270 having a narrower spoon-shaped cutting edge 272 and an elongated blade shaft 274 compared to the flexible medial calcaneal osteotome blade 260 having a spoon-shaped cutting edge 262 and a shorter blade shaft 264 shown in Figures 69-77. The elongated flexible medial calcaneal osteotome blade 270 having a narrower spoon-shaped cutting edge 272 and an elongated blade shaft 274 also includes the same components as those previously shown in Figures 78-83.

[0121] Figure 86 depicts a cross-sectional view of a flexible medial calcaneal osteotome blade 270 having a narrower spoon-shaped cutting edge 272 and an elongated blade shaft 274 compared to the flexible medial calcaneal osteotome blade 260 having a spoon-shaped cutting edge 262 and a shorter blade shaft 264 shown in Figures 69-77. The elongated flexible medial calcaneal osteotome blade 270 having a narrower spoon-shaped cutting edge 272 and an elongated blade shaft 274 also includes the same components as those previously shown in Figures 78-83.

[0122] FIG. 87 depicts a top elevated perspective view of a flexible medial calcaneal osteotome blade 280 having a spork-shaped cutting edge 282. The flexible medial calcaneal osteotome blade 280 having a spork-shaped cutting edge 282 also includes the following features: an elongated blade shaft 284 and a blade insertion plate 286 distal to the spork-shaped cutting edge 282. The blade insertion plate 286 defines one or more blade locking slots 288 therein. These blade locking slots 288 allow the flexible medial calcaneal osteotome blade 280 having a spork-shaped cutting edge 282 to be securely locked to the osteotome-handle assembly 220 (see details above), which locks surgical blades. What is the difference between a surgical chisel and an osteotome blade? An osteotome is an orthopedic surgical instrument typically used to cut bone. A surgical chisel is used to shape bone. Functionally, the primary difference is that a chisel has one beveled edge, while an osteotome has two beveled edges. Additionally, a flexible medial calcaneal osteotome blade 2860 with a spoon-shaped cutting edge 282 can be configured to be an osteotome blade with two beveled, pointed cutting edges, or a surgical chisel with only one beveled pointed cutting edge. Shown here in FIG. 87 is a flexible medial calcaneal osteotome blade 280 with a spoon-shaped cutting edge 282 with only one beveled chisel cutting edge. It is envisioned that the flexible medial calcaneal osteotome blade 280 can be configured with a spoon-shaped cutting edge 282, similar to an osteotome blade, with double beveled pointed cutting edges.

[0123] 88 depicts a front view of a flexible medial calcaneal osteotome blade 280 having a spork-shaped cutting edge 282. The flexible medial calcaneal osteotome blade 280 having a spork-shaped cutting edge 282 also includes the following features: a blade shaft 284 and a blade insertion plate 286 distal to the spork-shaped cutting edge 282. The blade insertion plate 286 defines one or more blade locking slots 288 therein. These blade locking slots 288 allow the flexible medial calcaneal osteotome blade 280 having a spork-shaped cutting edge 282 to be securely locked to the osteotome-handle assembly 220 (see details above), which locks surgical blades.

[0124] 89 depicts a cross-sectional view of the flexible medial calcaneal osteotome blade 280 having a spork-shaped cutting edge 282, as shown in FIG. 88. The flexible medial calcaneal osteotome blade 280 having a spork-shaped cutting edge 282 also includes the following features: a blade shaft 284 and a blade insertion plate 286 distal to the spork-shaped cutting edge 282. The blade insertion plate 286 defines one or more blade locking slots 288 therein. These blade locking slots 288 allow the flexible medial calcaneal osteotome blade 280 having a spork-shaped cutting edge 282 to be securely locked to the osteotome-handle assembly 220 (see details above), which locks surgical blades. The spork-shaped cutting edge 282 is both flexible and includes a uniquely designed curvature with a sharp spork-shaped cutting edge to more efficiently cut the medial calcaneal implant surface from the bone.

[0125] FIG. 90 depicts a top plan view of a flexible medial calcaneal osteotome blade 280 having a spork-shaped cutting edge 282 and a blade insertion plate 286 .

[0126] FIG. 91 depicts a bottom view of a flexible medial calcaneal osteotome blade 280 having a spork-shaped cutting edge 282 and a blade insertion plate 286 .

[0127] FIG. 92 depicts a rear view of a flexible medial calcaneal osteotome blade 280 having a spork-shaped cutting edge 282, as shown in FIG. 87. The flexible medial calcaneal osteotome blade 280 having a spork-shaped cutting edge 282 also includes the following features: a blade shaft 284 and a blade insertion plate 286 distal to the spork-shaped cutting edge 282. The blade insertion plate 286 defines one or more blade locking slots 288 therein. What is the difference between a surgical chisel and an osteotome blade? An osteotome is an orthopedic instrument typically used to cut bone. A surgical chisel is used to shape bone. Functionally, the primary difference is that a chisel has one beveled edge, while an osteotome has two beveled edges. Additionally, the flexible medial calcaneus osteotome blade 280 with a spork-shaped cutting edge 282 can be configured to be an osteotome blade with two beveled sharp cutting edges, or a surgical chisel with only one beveled sharp cutting edge. Shown here in FIG. 92 is a flexible medial calcaneus osteotome blade 280 with a spork-shaped cutting edge 282 with only one beveled chisel cutting edge. It is anticipated that the flexible medial calcaneus osteotome blade 280 can be configured with a spork-shaped cutting edge 282 similar to an osteotome blade with beveled sharp cutting edges on both sides.

[0128] Figure 93 depicts a left side elevational view of a flexible medial calcaneal osteotome blade 280 having a spork-shaped cutting edge 282, as shown in Figure 87. The flexible medial calcaneal osteotome blade 280 having a spork-shaped cutting edge 282 also includes the following features: a blade shaft 284 and a blade insert plate 286 distal to the spork-shaped cutting edge 282. The blade insert plate 286 defines one or more blade locking slots 288 therein.

[0129] Figure 94 depicts a front view of a flexible medial calcaneal osteotome blade 280 having a spork-shaped cutting edge 282, as shown in Figure 87. The flexible medial calcaneal osteotome blade 280 having a spork-shaped cutting edge 282 also includes the following features: a blade shaft 284 and a blade insert plate 286 distal to the spork-shaped cutting edge 282. The blade insert plate 286 defines one or more blade locking slots 288 therein.

[0130] Figure 95 depicts a right-side elevation view of a flexible medial calcaneal osteotome blade 280 having a spork-shaped cutting edge 282, as shown in Figure 87. The flexible medial calcaneal osteotome blade 280 having a spork-shaped cutting edge 282 also includes the following features: a blade shaft 284 and a blade insert plate 286 distal to the spork-shaped cutting edge 282. The blade insert plate 286 defines one or more blade locking slots 288 therein.

[0131] Figure 96 depicts a top elevated perspective view of a flexible medial calcaneal osteotome blade 290 having a narrower spork-shaped cutting edge 292 and an elongated blade shaft 294 compared to the flexible medial calcaneal osteotome blade 280 having a spork-shaped cutting edge 282 and a shorter blade shaft 284 shown in Figures 87-95. The elongated flexible medial calcaneal osteotome blade 290 having the narrower spork-shaped cutting edge 292 and elongated blade shaft 294 also includes the following feature: a blade insert plate 296 distal to the elongated blade shaft 294 and the narrower spork-shaped cutting edge 292. The blade insert plate 296 defines one or more blade locking slots 298 therein. These blade locking slots 298 allow an elongated, flexible medial calcaneal osteotome blade 290 with a narrower, spork-shaped cutting edge 292 to be securely locked to the surgical blade-locking osteotome-handle assembly 220 (see details above). The narrower, spork-shaped cutting edge 292 is both flexible and includes a uniquely designed curvature with a pointed, spoon-shaped cutting edge to more efficiently cut the medial calcaneal implant surface from the bone.

[0132] 97 depicts a front view of a flexible medial calcaneal osteotome blade 290 having a narrow spork-shaped cutting edge 292 and an elongated blade shaft 294. A blade insertion plate 296 defines one or more blade locking slots 298 therein that allow the elongated flexible medial calcaneal osteotome blade 290 having the narrower spork-shaped cutting edge 292 to be securely locked to the osteotome-handle assembly 220 (see details above), which locks the surgical blade.

[0133] Figure 98 depicts a cross-sectional view of a flexible medial calcaneal osteotome blade 290 having a narrow spork-shaped cutting edge 292 and an elongated blade shaft 294, as shown in Figure 97. The flexible medial calcaneal osteotome blade 290 having a spork-shaped cutting edge 292 also includes the following features: a blade insert plate 296 distal to the blade shaft 294 and the spork-shaped cutting edge 292.

[0134] FIG. 99 depicts a top plan view of a flexible medial calcaneal osteotome blade 290 having a narrow spork-shaped cutting edge 292 and an elongated blade shaft 294, showing the position of the narrow spork-shaped cutting edge 292 and blade insertion plate 296.

[0135] FIG. 100 depicts a bottom view of a flexible medial calcaneal osteotome blade 290 having a narrow spork-shaped cutting edge 292 and an elongated blade shaft 294, showing the location of the narrow spork-shaped cutting edge 292 and blade insertion plate 296.

[0136] FIG. 101 depicts a rear view of a flexible medial calcaneal osteotome blade 290 having a narrow spork-shaped cutting edge 292 and an elongated blade shaft 294, showing the blade insertion plate 296 and one or more blade locking slots 298 therein as well as the elongated blade shaft 294. What is the difference between a surgical chisel and an osteotome blade? An osteotome is an orthopedic instrument typically used to cut bone. A surgical chisel is used to shape bone. Functionally, the primary difference is that a chisel has one beveled edge, while an osteotome has two beveled edges. Additionally, the flexible medial calcaneal osteotome blade 290 having a spork-shaped cutting edge 292 can be configured to be an osteotome blade with two beveled, sharp cutting edges, or a surgical chisel with only one beveled sharp cutting edge. 101, a flexible medial calcaneal osteotome blade 290 is shown having a spork-shaped cutting edge 292 with a beveled chisel cutting edge on only one side. It is anticipated that the flexible medial calcaneal osteotome blade 290 can be configured with the same spork-shaped cutting edge 292 as osteotome blades with beveled pointed cutting edges on both sides.

[0137] FIG. 102 depicts a left side elevational view of a flexible medial calcaneal osteotome blade 290 having a narrow spork-shaped cutting edge 292 and an elongated blade shaft 294, showing the blade insert plate 296 as well as the elongated blade shaft 294.

[0138] FIG. 103 depicts a front view of a flexible medial calcaneal osteotome blade having a spork-shaped cutting edge and an elongated blade shaft. A blade insertion plate 286 defines one or more blade locking slots 288 therein. These blade locking slots 288 allow the flexible medial calcaneal osteotome blade 280 having the spork-shaped cutting edge 282 to be securely locked to the osteotome-handle assembly 220 (see details above), which locks the surgical blade. The spork-shaped cutting edge 282 is both flexible and includes a uniquely designed curvature with a sharpened spork-shaped cutting edge to more efficiently cut the medial calcaneal implant surface from the bone.

[0139] FIG. 104 depicts a right side elevational view of a flexible medial calcaneal osteotome blade 290 having a narrow spork-shaped cutting edge 292 and an elongated blade shaft 294, showing the blade insert plate 296 as well as the elongated blade shaft 294.

[0140] FIG. 105 depicts a top plan view of a curved lateral shoulder release osteotome blade 300 showing the curved cutting edge 302 and flat blade insert plate 308.

[0141] FIG. 106 depicts a bottom view of a curved lateral shoulder release osteotome blade 300 showing the curved cutting edge 302 and flat blade insert plate 308.

[0142] 107 depicts a left side elevation view of the curved lateral shoulder release osteotome blade 300 showing the curved cutting edge 302. Additional features of the curved lateral shoulder release osteotome blade 300 include a blade shaft 304 having a narrow portion 306 of the blade shaft before reaching a blade insert plate 308.

[0143] 108 depicts a front view of a curved lateral shoulder release osteotome blade 300 showing the curved cutting edge 302. Additional features of the curved lateral shoulder release osteotome blade 300 include a curved blade shaft 304 with a narrow portion 306 of the flat blade shaft before reaching a flat blade insert plate 308. One or more blade locking slots 310 lock into the blade insert plate 308.

[0144] 109 depicts a right side elevation view of the curved lateral shoulder release osteotome blade 300 showing the curved cutting edge 302. Additional features of the curved lateral shoulder release osteotome blade 300 include a curved blade shaft 304 with a narrow portion 306 of the flat blade shaft before reaching a flat blade insert plate 308.

[0145] 110 depicts a top elevated perspective view of the curved lateral shoulder release osteotome blade 300 showing the curved cutting edge 302. Additional features of the curved lateral shoulder release osteotome blade 300 include a curved blade shaft 304 having a narrow portion 306 of the flat blade shaft before reaching a flat blade insert plate 308. One or more blade locking slots 310 are located in the blade insert plate 308.

[0146] 111 depicts a top elevated perspective view of the curved lateral shoulder release osteotome blade 300 showing the curved cutting edge 302. Additional features of the curved lateral shoulder release osteotome blade 300 include a curved blade shaft 304 with a narrow portion 306 of the flat blade shaft before reaching a flat blade insert plate 308. One or more blade locking slots 310 lock into the flat blade insert plate 308.

[0147] 112 depicts a front view of the curved lateral shoulder release osteotome blade 300 showing the curved cutting edge 302. Additional features of the curved lateral shoulder release osteotome blade 300 are clearly seen, including a curved blade shaft 304 with a narrow portion 306 of the flat blade shaft before reaching the blade insert plate 308, and one or more blade locking slots 310 located within the flat blade insert plate 308.

[0148] Figure 113 depicts a cross-sectional view of the curved lateral shoulder release osteotome blade 300, as shown in Figure 112, showing the curved cutting edge 302. Additional features of the curved lateral shoulder release osteotome blade 300 are clearly seen, including the curved blade shaft 304, which has a narrow portion 306 of the blade shaft before reaching the blade insert plate 308.

[0149] FIG. 114 depicts a top plan view of an alternative embodiment of a curved lateral shoulder release osteotome blade 320 featuring a protruding stop 326 on the curved blade shaft 324 .

[0150] 115 depicts a bottom view of an alternative embodiment of a curved lateral shoulder release osteotome blade 320 featuring a protruding stop 326 on the curved blade shaft 324. In this view, the blade insert plate 328 can also be clearly seen.

[0151] FIG. 116 depicts a rear view of a curved lateral shoulder release osteotome blade 320 having a protruding stop 326 feature on the curved blade shaft 324. The protruding stop feature 326 is located approximately halfway along the curved blade shaft 324 between the cutting edge 322 and the blade insert plate 328. The curved blade shaft 324 also has a narrow portion above the blade insert plate 328. Additional features of the blade insert plate 328 include one or more blade locking slots 330 located within the blade insert plate 328. What is the difference between a surgical chisel and an osteotome blade? An osteotome is an orthopedic surgical instrument typically used to cut bone. A surgical chisel is used to shape bone. Functionally, the main difference is that a chisel has one beveled edge, while an osteotome has two beveled edges. Additionally, the curved lateral shoulder release osteotome blade 320 featuring a protrusion stop 326 on the curved blade shaft can be configured to be an osteotome blade with two beveled sharp cutting edges, or a surgical chisel with only one beveled sharp cutting edge. Shown here in FIG. 116 is a curved lateral shoulder release osteotome blade 320 featuring a protrusion stop 326 on the curved blade shaft 324 with a chisel cutting edge that is beveled on only one side. It is anticipated that the curved lateral shoulder release osteotome blade 320 can be configured with the same protrusion stop 326 feature on the curved blade shaft 324 as an osteotome blade with beveled sharp cutting edges on both sides.

[0152] 117 depicts a front view of a curved lateral shoulder release osteotome blade 320 having a protrusion stop 326 feature on the curved blade shaft 324. Again, the protrusion stop feature 326 is located approximately halfway along the curved blade shaft 324 between the cutting edge 322 and the blade insert plate 328. The curved blade shaft 324 also has a narrow portion above the blade insert plate 328. Additional features of the blade insert plate 328 include one or more blade locking slots 330 located within the blade insert plate 328.

[0153] 118 depicts a right side elevation view of a curved lateral shoulder release osteotome blade 320 having a protruding stop 326 feature on the curved blade shaft 324. This right side elevation view shows the location of the protruding stop feature 326 relative to the cutting edge 322 and the position of the blade insert plate 328.

[0154] 119 depicts a left side elevational view of a curved lateral shoulder release osteotome blade 320 featuring a protruding stop feature 326 on the blade shaft. This left side elevational view also better illustrates the location of the protruding stop feature 326 relative to the cutting edge 322 and the position of the blade insert plate 328.

[0155] FIG. 120 depicts a top elevated perspective view of a curved lateral shoulder release osteotome blade 320 having a protruding stop feature 326 on the blade shaft. This top elevated perspective view also better illustrates the location of the protruding stop feature 326 relative to the position of the cutting edge 322 and the blade insert plate 328. The protruding stop feature 326 is located approximately halfway along the curved blade shaft 324, between the cutting edge 322 and the blade insert plate 328. The curved blade shaft 324 also has a narrow portion above the blade insert plate 328. Additional features of the blade insert plate 328 include one or more blade locking slots 330 located therein. In operation, the curved lateral shoulder release osteotome blade 320 is first locked into the handle assembly 220 and then inserted into one of the rear guide slots 32 in the guide block assembly 20. The surgeon then applies downward pressure on the handle assembly 220, causing the curved lateral shoulder release osteotome blade 320 to extend downward and cut the lateral shoulder of the implant 130 during the revision surgery (see FIG. 68). In FIG. 68, the surgical blade 238 shown is now equivalent to the curved lateral shoulder release osteotome blade 320 shown in FIG. 120. In this manner, the lateral shoulder of the implant is released from the bone, leaving the medial calcaneus and the anterior and posterior aspects free to extract the implant 130 from the bone.

[0156] 121 depicts a front view of a curved lateral shoulder release osteotome blade 320 having a protruding stop feature 326 on the blade shaft, which also better illustrates the location of the protruding stop feature 326 relative to the position of the cutting edge 322 and blade insert plate 328. The protruding stop feature 326 is located approximately halfway down the curved blade shaft 324 between the cutting edge 322 and the blade insert plate 328. The curved blade shaft 324 also has a narrow portion above the blade insert plate 328. Additional features of the blade insert plate 328 include one or more blade locking slots 330 located in the blade insert plate 328 that have a protruding stop feature on the blade shaft.

[0157] Figure 122 depicts a cross-sectional view of a curved lateral shoulder release osteotome blade 320 having a protruding stop feature 326 on a curved blade shaft 324, as shown in Figure 121. The cross-sectional view shows the location of the blade cutting edge 322, the curved blade shaft 326 with a narrow portion, the blade insert plate 328, and the location of the protruding stop feature 326 relative to the position of the cutting edge 322 and the blade insert plate 328.

[0158] 123 depicts a top elevated perspective view of a general-purpose release chisel osteotome blade 340. The general-purpose release chisel osteotome blade 340 is flat and semi-rigid and has the following features: a sharp, chisel-shaped pointed cutting edge 342, a flat chisel blade shaft 344, and a blade insert plate 346 having one or more blade locking slots 348 therein.

[0159] FIG. 124 depicts a front view of a general-purpose release chisel osteotome blade 340, also showing the following features: a sharp, chisel-shaped, pointed cutting edge 342, a flat chisel blade shaft 344, and the location of a blade insertion plate 346 having one or more blade locking slots 348 therein.

[0160] Figure 125 depicts a cross-sectional view of the general-purpose release chisel osteotome blade 340 as shown in Figure 124. The general-purpose release chisel osteotome blade 340 includes a sharp, chisel-shaped pointed cutting edge 342, a flat chisel blade shaft 344, and a blade insert plate 346, as seen in this Figure 125.

[0161] FIG. 126 depicts a top plan view of a general purpose release chisel osteotome blade 340 showing a sharp chisel-shaped pointed cutting edge 342 placed on top of the general purpose release chisel osteotome blade 340 .

[0162] FIG. 127 depicts a bottom view of the general purpose release chisel osteotome blade 340 showing the blade insert plate 346 placed on the bottom of the general purpose release chisel osteotome blade 340 .

[0163] 128 depicts a rear view of a general-purpose release chisel osteotome blade 340. The general-purpose release chisel osteotome blade 340 is flat and semi-rigid and has the following features: a sharp, chisel-shaped pointed cutting edge 342, a flat chisel blade shaft 344, and a blade insert plate 346 having one or more blade locking slots 348 therein.

[0164] 129 depicts a left side elevational view of a general purpose open chisel osteotome blade 340, showing the sharp chisel-shaped pointed cutting edge 342, the flat chisel blade shaft 344, and the location of the blade insert plate 346.

[0165] 130 depicts a front view of a general-purpose release chisel osteotome blade. The general-purpose release chisel osteotome blade 340 is flat and semi-rigid and has the following features: a sharp, chisel-shaped pointed cutting edge 342, a flat chisel blade shaft 344, and a blade insert plate 346 with one or more blade locking slots 348 therein.

[0166] 131 depicts a right-side elevation view of a general-purpose open chisel osteotome blade 340. It shows the sharp chisel-shaped pointed cutting edge 342, the flat chisel blade shaft 344, and the location of the blade insert plate 346.

[0167] 132 depicts a top elevated perspective view of a front and rear osteotome blade 350 having a sharp, pointed cutting edge 352, a sharp, curved cutting edge 358 on the left side, the curve on the left side defining a blade protrusion 356 on the left side of the cutting blade, and a sharp, straight cutting edge 354 on the right side. Additional features of the front and rear osteotome blades 350 include a blade shaft 360 and a blade insertion plate 362 having one or more blade locking slots 364 therein.

[0168] FIG. 133 depicts a front view of front and rear osteotome blades 350 having a sharp pointed cutting edge 352, a sharp curved cutting edge 358 on the left side, and a sharp straight cutting edge 354 on the right side, clearly showing that the curvature on the left side defines a blade protrusion 356 on the left side of the cutting blade; similar features of the front and rear osteotome blades 350 include a blade axis 360 and a blade insertion plate 362 having one or more blade locking slots 364 therein.

[0169] Figure 134 depicts a cross-sectional view of the anterior and posterior osteotome blades 350 as shown in Figure 133. Here, the sharp cutting edges 352, blade shaft 360, and blade insert plate 362 are all visible in this cross-sectional view.

[0170] FIG. 135 depicts a top plan view of the anterior and posterior osteotome blades 360 showing the location of the sharp pointed cutting edge 352 and the right sharp straight cutting edge 354.

[0171] FIG. 136 depicts a bottom view of the anterior and posterior osteotome blades 360 showing the blade projections 356 and blade insert plate 362.

[0172] 137 depicts a rear view of the front and rear osteotome blades 350 with sharply pointed cutting edges 352, a sharply curved cutting edge on the left, now showing the backside 368 of the cutting edge, and a sharply straight cutting edge on the right, now showing the backside 366 of the cutting edge. Additional features of the front and rear osteotome blades 350 are also seen here, including a blade shaft 360 and a blade insertion plate 362 having one or more blade locking slots 364 therein.

[0173] FIG. 138 depicts a left side elevational view of the anterior and posterior osteotome blade 350 showing the sharp pointed cutting edge 352, the left sharp curved cutting edge 358, and the blade insert plate 362.

[0174] 139 depicts a front view of front and rear osteotome blades 350 having a sharply pointed cutting edge 352, a sharply curved left cutting edge 358, the left curvature defining a blade protrusion 356 on the left side of the cutting blade, and a straight right cutting edge 354. Additional features of the front and rear osteotome blades 350 include a blade axis 360 and a blade insert plate 362 having one or more blade locking slots 364 (all visible here).

[0175] FIG. 140 depicts a right side elevation view of the anterior and posterior osteotome blades 350 showing the sharp pointed cutting edge 352, the right straight cutting edge 354, the blade shaft 360, and the blade insert plate 362.

[0176] FIG. 141 depicts a top elevated perspective view of a front and rear osteotome blade 370 having a pointed, sharp upper cutting edge 372, a right curved cutting edge 378, the right curvature defining a right blade projection 376 of the cutting blade, and a left straight cutting edge 374 configured as a mirror image of the blade shown in FIGS. 132-140. Additional features of the front and rear osteotome blades 370 include a blade shaft 380, a blade insert plate 382, ​​and one or more blade locking slots 384 located within the blade insert plate 382. During operation, the locking slots 384 are used to lock the blade in place within the osteotome blade handle assembly 220 (see FIGS. 52-66 above).

[0177] Figure 142 depicts a front view of front and rear osteotome blades 370 having a pointed, sharp upper cutting edge 372, a right curved cutting edge 378, the right curvature defining a blade projection 376 on the right side of the cutting blade, and a left straight cutting edge 374 configured as a mirror image of the blades shown in Figures 132-140. Additional features of the front and rear osteotome blades 370 include a blade shaft 380, a blade insert plate 382, ​​and one or more blade locking slots 384 located within the blade insert plate 382.

[0178] Figure 143 depicts a cross-sectional view of anterior and posterior osteotome blades 370 with pointed sharp upper cutting edges 372, and a curved cutting edge 378 on the right side as shown in Figure 142. The cross-sectional view shows the pointed sharp upper cutting edge 372, the straight cutting edge 374 on the left side, the blade shaft 380, and the blade insert plate 382.

[0179] FIG. 144 depicts a top plan view of the anterior and posterior osteotome blades 370 showing the right curved cutting edge 378 and blade insert plate 382.

[0180] FIG. 145 depicts a bottom view of the anterior and posterior osteotome blades 370 showing the blade insert plate 382 and the blade projection 376 on the right side of the cutting blade.

[0181] 146 depicts a rear view of the front and rear osteotome blades 370, having a pointed, sharp upper cutting edge 372, a sharp, curved cutting edge 378 on the right side (not shown, see FIG. 142), now showing the backside 386 of the cutting edge, and a sharp, straight cutting edge 374 on the left side (not shown, see FIG. 142), now showing the backside 388 of the cutting edge. Additional features of the front and rear osteotome blades 370 are seen here as well, including a blade shaft 380 and a blade insert plate 382 having one or more blade locking slots 384 therein.

[0182] Figure 147 depicts a left side elevational view of anterior and posterior osteotome blades 370 with pointed sharp upper cutting edges 372, and a right curved cutting edge 378 as shown in Figure 142. The cross section shows the pointed sharp upper cutting edge 372, the left sharp straight cutting edge 374, the blade shaft 380, and the blade insert plate 382.

[0183] Figure 148 depicts a front view of front and rear osteotome blades 370 having a pointed, sharp upper cutting edge 372, a right curved cutting edge 378, the right curvature defining a blade projection 376 on the right side of the cutting blade, and a left straight cutting edge 374 configured as a mirror image of the blades shown in Figures 132-140. Additional features of the front and rear osteotome blades 370 include a blade shaft 380, a blade insert plate 382, ​​and one or more blade locking slots 384 located within the blade insert plate 382.

[0184] 149 depicts a right side elevational view of the anterior and posterior osteotome blades 370 with pointed sharp upper cutting edges 372. Also visible in this view are the right curved cutting edge 378 and blade insert plate 382.

[0185] FIG. 150 depicts a front view of the osteotome blade locking handle assembly 220 having a flexible medial calcaneal spoon-shaped blade 260 attached thereto, through which the flexible medial calcaneal spoon-shaped blade 260 extends and is guided by the guide block assembly 20 to sever the medial calcaneus from the implanted femoral stem 130. This FIG. 150 shows a system using the same components shown in FIGS. 1-149. Once the guide block assembly 20 is adjusted to the implant size and shape using the upper guide plate 26, lower guide plate 38, and securely held by the guide plant adjustment screw 30, the blade can be moved downward (see directional arrow) to sever the implant 130 from the bone (not shown). The flexible medial calcaneal spoon-shaped blade 260 is secured to the osteotome handle assembly 220 and curves downward to pass along the contour of the implant medial calcaneus.

[0186] FIG. 151 depicts a top elevated perspective view of the osteotome blade locking handle assembly 220 having a flexible medial calcaneal spoon-shaped blade 260 attached thereto, extending therethrough and guided by the guide block assembly 20 to cut the medial calcaneus from the implanted femoral stem. This FIG. 150 shows a system using the same components shown in FIGS. 1-149. Prior to insertion of the blade 260, the guide block is secured to the implant's trunnion using the trunnion fixation member 44, and the guide plate 38 is adjusted to the size and contour of the implant's medial calcaneal surface. After cutting the implant from the bone, the sliding hammer assembly 200 is threaded onto the guide block 20, and with an upward striking motion, the implant is extracted upward from the bone.

[0187] FIG. 152 depicts a rear view of the osteotome blade locking handle assembly 220 with the flexible medial calcaneal spoon-shaped blade 260 attached thereto, extending therethrough and guided by the guide block assembly 20 to cut the medial calcaneus from the implanted femoral stem 130. This FIG. 150 shows a system using the same components shown in FIGS. 1-149. The cutting edge 262 with the flexible medial calcaneal spoon-shaped blade 260, secured by the osteotome handle assembly 220, cuts along the contour of the medial calcaneus of the implant 130, guided by the adjusted guide block assembly 20. The lateral shoulder of the implant is then separated from the bone using a curved lateral shoulder release blade (see FIGS. 67 and 68). Additionally, the anterior and posterior implant surfaces are cut from the bone using osteotome blades as described in Figures 132-149. The same osteotome blade locking handle assembly 220 is used for each bone cutting procedure, with various osteotome blades being easily removed and replaced as needed during revision procedures.

[0188] FIG. 153 depicts a cross-sectional view of the osteotome blade locking handle assembly 220 with a flexible medial calcaneal spoon-shaped blade attached thereto, through which the flexible medial calcaneal spoon-shaped blade 260 extends, guided by the guide block assembly 20, to cut the medial calcaneus from the implanted femoral stem 130, as shown in FIG. 152. This FIG. 150 shows a system using the same components shown in FIGS. 1-149. In this view, it is clear that the guide block assembly 20 is adjusted to the implant size and shape using the upper guide plate 26, lower guide plate 38, and is securely held in place by the guide plant adjustment screw 30. Also shown in FIG. 153 are the locking handle 222 and locking lever 230 that lock the flexible medial calcaneal spoon-shaped blade 260 in place to move it in either a downward or upward direction (see directional arrows). A cutting edge 262 with a flexible medial calcaneal spoon-shaped blade 260 secured by the osteotome handle assembly 220 is guided by the adjusted guide brace assembly 20 to cut along the medial calcaneal contour of the implant 130. In this case, the implant is collarless, but it should be understood that the revision osteotome blades and surgical chisel blades described herein work equally well to extract collared implants.

[0189] FIG. 154 depicts a front view of the osteotome blade locking handle assembly 220 having a flexible medial calcaneal spoon-shaped blade 260 attached thereto, through which a flexible medial calcaneal spork-shaped blade 280 extends, guided by the guide block assembly 20, to cut the medial calcaneus from the implanted femoral stem 130. This FIG. 154 shows a system using the same components shown in FIGS. 1-149. Once the guide block assembly 20 is adjusted to the implant size and shape using the upper guide plate 26, lower guide plate 38, and held securely by the guide plant adjustment screw 30, the blade can be moved downward (see directional arrow) to cut the implant 130 from the bone (not shown). A flexible medial calcaneal spork-shaped blade 280 is fixed to the osteotome-handle assembly 220 and curves to pass it down along the contour of the implant medial calcaneus, using cutting edges 282 to separate the implant 130 from the bone.

[0190] FIG. 155 depicts a top elevated perspective view of the osteotome blade locking handle assembly 220 having a flexible medial calcaneal spoon-shaped blade 280 attached thereto, the flexible medial calcaneal spoon-shaped blade 280 extending therethrough and guided by the guide block assembly 20 to sever the medial calcaneus from the implanted femoral stem. This FIG. 150 shows a system using the same components shown in FIGS. 1-149. Prior to insertion of the flexible medial calcaneal spoon-shaped blade 280, the guide block is secured to the implant's trunnion using the trunnion fixation member 44, and the guide plate 38 is adjusted to the size and contour of the implant's medial calcaneal surface. After cutting the implant from the bone, a sliding hammer assembly 200 (not shown) is threaded into the guide block 20 at the female threaded orifice 34, and with an upward striking motion the implant is pulled upwardly from the bone.

[0191] FIG. 156 depicts a rear view of the osteotome blade locking handle assembly 220 with the flexible medial calcaneal spoon-shaped blade 260 attached thereto, extending therethrough and guided by the guide block assembly 20 to cut the medial calcaneus from the implanted femoral stem 130. This FIG. 150 shows a system using the same components shown in FIGS. 1-149. The cutting edge 262 with the flexible medial calcaneal spoon-shaped blade 260, secured by the osteotome handle assembly 220, cuts along the contour of the medial calcaneus of the implant 130, guided by the adjusted guide block assembly 20. The lateral shoulder of the implant is then separated from the bone using a curved lateral shoulder release blade (see FIGS. 67 and 68). Additionally, the anterior and posterior implant surfaces are cut from the bone using osteotome blades as described in Figures 132-149. The same osteotome blade locking handle assembly 220 is used for each bone cutting procedure, with various osteotome blades being easily removed and replaced as needed during revision procedures.

[0192] FIG. 157 depicts a cross-sectional view of the osteotome blade locking handle assembly 220 having attached thereto a flexible medial calcaneal spoon-shaped blade 280 extending therethrough and guided by the guide block assembly 20 to sever the medial calcaneus from the implanted femoral stem 130 as shown in FIG. 156. This FIG. 150 shows a system using the same components shown in FIGS. 1-149. In this view, it is clear that the guide block assembly 20 is adjusted to the implant size and shape using the upper guide plate 26, lower guide plate 38, and is held securely in place by the guide plant adjustment screw 30. Also shown in FIG. 153 is a locking handle 222 and locking lever 230 that lock the flexible medial calcaneal spoon-shaped blade 280 in place to move the blade 260 in either a downward or upward direction (see directional arrows). The cutting edge 282 of the flexible medial calcaneal spoon-shaped blade 280, secured by the osteotome handle assembly 220, is guided by the adjusted guide block assembly 20 to cut along the medial calcaneal contour of the implant 130. After cutting the implant from the bone, the sliding hammer assembly 200 is threaded into the guide block 20, and with an upward striking motion, the implant is extracted upwardly from the bone. In this case, the implant is uncollared, but it should be understood that the revision osteotome blades and surgical chisel blades described herein work equally well to extract collared implants. This Figure 157 shows the four main components of the system which then work together to efficiently extract the implant in a very short time with very little blood loss and therefore significantly improve patient outcomes in revision surgeries.

[0193] In summary, the four main components—(1) the guide block assembly 20, (2) the osteotome blade locking handle assembly 220, (3) the sliding hammer, and (4) the various flexible medial calcaneal osteotome blades, lateral shoulder release blades, anterior and posterior blades, and universal release chisels for joint revision osteotome blades and surgical chisel blades—all work synergistically together to make implant extraction more effective, less time consuming, and with significantly less patient blood loss, all of which improves patient outcomes. Furthermore, the system can be adjusted to extract implants of all sizes and shapes, including collared and collarless prostheses. The embodiment of the guide block assembly 20 of the joint revision system and method 10A, in which the assembled osteotome blade guide block 20 has adjustable L-shaped osteotome blade guide plates 26 and 38, can be adjusted in two separate ways. First, the adjusting plate retaining screw 30 can be threaded outward (raised) or inward (lowered) to retract the lower adjusting plate 38 toward or away from the stem. Second, the adjusting plate retaining screw 30 can be removed altogether, shifting the lower guide plate 38 to a different guide slot within the multiple blade guide slots 36, moving the guide slot closer or further away from the stem being extracted. By adjusting one or both of the aforementioned guide plates, the cutting blade can be successfully guided to various sized stems. In this manner, the guide block assembly 20 can accommodate various sized stems removed during revision surgery. Furthermore, both collared and collarless stems can be extracted by appropriately adjusting the length and distance of the adjustable guide plates. Regarding the various osteotome blades and surgical chisels described herein, osteotomes are orthopedic surgical instruments typically used to cut bone. Surgical chisels are used to shape bone. Functionally, the main difference is that a chisel has one beveled edge, while an osteotome has two beveled edges.Additionally, the flexible medial calcaneal osteotome blades with spoon-shaped and spork-shaped cutting edges can be configured to be osteotome blades with two beveled sharp cutting edges, or to be surgical chisels with only one beveled sharp cutting edge. This is also an aspect of the present invention, and all of the blades disclosed and described herein can be configured as either osteotome blades or surgical chisels, can be flexible or rigid, and can be curved and compound curved (curved in two planes).

[0194] In addition to the two-piece construction of the assembled surgical osteotome blade guide block 20, it is contemplated that the surgical osteotome blade guide block assembly 20 of the present invention can be manufactured and formed in one piece by being molded or computer numerically controlled (CNC) formed from one piece of material, including, but not limited to, metal, plastic, wood, ceramic, and composite. Similarly, it is contemplated that the stem trunnion fixation member of the present invention can be manufactured and formed in one or two pieces by being molded or computer numerically controlled (CNC) formed from one or two pieces of material, including, but not limited to, metal, plastic, wood, ceramic, and composite.

[0195] In joint revision surgeries, extraction of an implanted prosthesis, such as a femoral stem, presents a challenging challenge to the surgeon. The present invention makes the extraction process significantly easier, faster, more efficient, and far less traumatic to the patient. In summary, the following are 12 steps of a surgical procedure utilizing joint revision instruments 10P and 10Q to extract a femoral stem in accordance with the present invention.

[0196] Steps of a femoral stem extraction procedure using the guide plate assembly 20 of embodiment 10A (adjustable guide plate method)

[0197] 1. Approach the hip joint according to the surgeon's preference: anterior, posterior, or lateral.

[0198] 2. Release the soft tissue and dislocate the hip joint. Remove the femoral head. Remove soft tissue as needed to expose the bone-implant junction. Use a Lambot osteotome to define the bone-implant junction. If a collared stem is found, remove a small section of bone below the collar to allow the flexible osteotome to access the stem below the collar.

[0199] 3. Next, using specific osteotomes for the anterior and posterior aspects, advance the anterior and posterior osteotome blades under the anterior and posterior aspects of the implant to free them from the bone.

[0200] 4. After the front and rear faces are released, select the appropriate trunnion fixture adapter.

[0201] 5. Fasten the guide block trunnion fixing member to the stem trunnion, and use the fixing nut to secure the trunnion fixing member to the guide block.

[0202] 6. Next, select the appropriate slot to place the adjustable guide plate in. After the correct slot is selected, thread the screw into the block and adjust the guide plate to the appropriate depth.

[0203] 7. Next, advance the flexible medial calcaneal osteotome blade under the heel. Adjust the guide plate as needed while advancing the blade to sever the medial calcaneal implant surface from the bone.

[0204] 8. Remove the flexible medial calcaneal osteotome blade.

[0205] 9. Next, select the appropriate slot laterally and advance the curved lateral shoulder release osteotome blade until the lateral shoulder is freed from the bone.

[0206] 10. Screw the sliding hammer into the threaded orifice on the top of the guide black assembly.

[0207] 11. Move the sliding hammer handle upward so that it strikes the upper impingement cap until the implant is fully released.

[0208] 12. The implant is extracted by the upward movement of the sliding hammer.

[0209] The joint revision osteotome blade and surgical chisel blade components 10A, 20, 100, 140, 200, 220, 260, 270, 280, 290, 300, 320, 340, 350 and 370 shown in the drawings and described in detail herein disclose specific structural and configurational arrangements of elements to illustrate preferred embodiments of the structure and method of operation of the present designs. However, elements of different constructions and configurations, and other arrangements thereof, than those shown and described may be utilized to provide joint revision osteotome blade and surgical chisel blade components 10A, 20, 100, 140, 200, 220, 260, 270, 280, 290, 300, 320, 340, 350 and 370 in accordance with the spirit of this application, and such changes, substitutions and modifications as would occur to those skilled in the art are deemed to be within the scope of this application as broadly defined in the appended claims.

[0210] While certain embodiments of the present invention have been described, these embodiments are presented by way of example only and are not intended to limit the scope of the present disclosure. Indeed, the novel methods and systems described herein may be embodied in a variety of other forms. Furthermore, various omissions, substitutions, and modifications may be made in the systems and methods described herein without departing from the spirit of the present disclosure. For example, parts of one embodiment described herein may be substituted for other parts of another embodiment described herein. The appended claims and their equivalents are intended to cover such forms or modifications as would fall within the scope and spirit of the present disclosure. Accordingly, the scope of the present invention is defined solely by reference to the appended claims.

[0211] It is understood that a feature, material, characteristic, or group described in connection with a particular aspect, embodiment, or example is applicable to any other aspect, embodiment, or example described in this section or anywhere herein, unless inconsistent therewith. All features disclosed in this specification (including any accompanying claims, abstract, and drawings), and / or all steps of any method or process so disclosed, may be combined in any combination, except combinations in which at least some of such features and / or steps are mutually exclusive. Protection is not limited to the details of any foregoing embodiment. Protection extends to any novel or any novel combination of features disclosed in this specification (including any accompanying claims, abstract, and drawings), or any novel or any novel combination of steps of any method or process so disclosed.

[0212] Furthermore, certain features described in this disclosure in the context of separate implementations can also be implemented in combination in a single implementation. Conversely, various features described in the context of a single implementation can also be implemented in multiple implementations separately or in any suitable subcombination. Moreover, while features may be described as working in a particular combination, one or more features can be deleted from the claimed combination, or the combination can be claimed as a subcombination or a variation of the subcombination.

[0213] Moreover, although operations may be depicted in the figures or described herein in a particular order, such operations need not be performed in the particular order or sequence shown, or that all operations performed need not achieve desirable results. Other operations not depicted or described may be incorporated into the example methods and processes. For example, one or more additional operations may occur before, after, simultaneously with, or between any described operations. Furthermore, operations may be rearranged or resequenced in other implementations. Those skilled in the art will recognize that in some embodiments, the actual steps performed in the illustrated and / or disclosed processes may differ from those shown in the figures. Depending on the embodiment, certain steps described above may be eliminated, and other steps may be added. Furthermore, features and attributes of specific embodiments disclosed above may be combined in different ways to form additional embodiments, all of which are within the scope of the present disclosure. Furthermore, the separation of various system components in the implementations described above should not be understood to require such separation in all implementations, and it should be understood that the described components and systems may generally be integrated together in a single product or packaged in multiple products.

[0214] For purposes of this disclosure, certain aspects, advantages, and novel features have been described herein. Not necessarily all such advantages may be achieved by any particular embodiment. Thus, for example, those skilled in the art will recognize that the present disclosure may be embodied or carried out in a manner that achieves one advantage or group of advantages as taught herein, without necessarily achieving other advantages that may be taught or suggested herein.

[0215] Predicate language such as "can," "could," "might," or "may," unless expressly stated otherwise or understood within the context as used, is intended to convey that a particular embodiment generally includes certain features, elements, and / or steps, while other embodiments do not. Thus, such predicate language is not intended to suggest that features, elements, and / or steps are in any way required for one or more embodiments, or that one or more embodiments necessarily include logic for determining, with or without user input or user prompts, whether those features, elements, and / or steps are included in or should be performed in any particular embodiment.

[0216] Connective language such as the phrase "at least one of X, Y, and Z," unless expressly stated otherwise, is generally understood in the context in which it is used to convey that an item, term, etc. may be either X, Y, or Z. Thus, such connective language is generally not intended to suggest that a particular embodiment requires the presence of at least one X, at least one Y, and at least one Z.

[0217] As used herein, language of degree, such as the terms "approximately," "about," "generally," and "substantially," refers to a value, amount, or characteristic that approaches a stated value, amount, or characteristic that still performs a desired function or achieves a desired result. For example, the terms "approximately," "about," "generally," and "substantially" may refer to an amount that is less than 10%, less than 5%, less than 1%, less than 0.1%, and less than 0.01% of the stated amount. As another example, in certain embodiments, the terms "generally parallel" and "substantially parallel" refer to a value, amount, or characteristic that deviates from strictly parallel by no more than 15 degrees, no more than 10 degrees, no more than 5 degrees, no more than 3 degrees, no more than 1 degree, or no more than 0.1 degrees.

[0218] The scope of the present disclosure is not intended to be limited by the specific disclosure of preferred embodiments in this section or by any of the present specification, but may be defined by the claims, as they appear in this section or the specification, or as they may appear in the future. Claim language should be interpreted broadly based on the language used in the claims and should not be limited to the examples set forth in this specification or in the filing of this application, which examples should be construed as non-exclusive.

[0219] Furthermore, the purpose of the foregoing Abstract is to enable the U.S. Patent and Trademark Office, foreign patent offices throughout the world, and the public generally, and scientists, engineers, and physicians in the field who are not particularly familiar with patent or legal terminology or terminology, to quickly assess the nature and substance of the technical disclosure of the present application upon inspection. The Abstract is not intended to define the invention of the present application as measured by the claims, nor is it intended to limit the scope of the invention in any way.

Claims

1. (a) a spoon-shaped cutting edge; (b) a blade shaft; (c) a medial calcaneal osteotome blade for joint revision surgery, including a blade insert plate.

2. 10. The medial calcaneal osteotome blade for joint revision surgery of claim 1, wherein the spoon-shaped cutting edge is beveled on both sides of the cutting edge.

3. 10. The medial calcaneal osteotome blade for joint revision surgery of claim 1, wherein the spoon-shaped cutting edge is beveled on one side of the cutting edge.

4. The medial calcaneal osteotome blade for joint revision surgery of claim 1 , wherein the blade shaft is flexible.

5. The medial calcaneal osteotome blade for joint revision surgery according to claim 1 , wherein the blade shaft is elongated.

6. (a) a spork-shaped cutting edge; (b) a blade shaft; (c) a medial calcaneal osteotome blade for joint revision surgery, including a blade insert plate.

7. 7. The medial calcaneal osteotome blade for joint revision surgery of claim 6, wherein the spork-shaped cutting edge is beveled on both sides of the cutting edge.

8. 7. The medial calcaneal osteotome blade for joint revision surgery of claim 6, wherein the spork-shaped cutting edge is beveled on one side of the cutting edge.

9. The medial calcaneal osteotome blade for joint revision surgery according to claim 6 , wherein the blade shaft is flexible.

10. The medial calcaneal osteotome blade for joint revision surgery according to claim 6 , wherein the blade shaft is elongated.

11. (a) a curved cutting edge; (b) a blade shaft; (c) a blade insert plate; and

12. The curved lateral shoulder release osteotome blade for joint revision surgery of claim 11 , wherein the curved cutting edge is beveled on both sides of the cutting edge.

13. 12. The curved lateral shoulder release osteotome blade for joint revision surgery of claim 11, wherein the spoon-shaped cutting edge is beveled on one side of the curved cutting edge.

14. 12. The joint revision medial calcaneal osteotome blade of claim 11, wherein the blade shaft further includes a blade stop projection thereon.

15. The joint revision medial calcaneal osteotome blade of claim 11 , wherein the blade shaft is rigid.

16. (a) a sharp cutting edge having an inverted angled shape; (b) a blade shaft; (c) a chisel blade for revision general release joint surgery, including a blade insert plate.

17. 17. The joint revision general release chisel blade of claim 16, wherein the curved cutting edge is beveled on one side of the sharp cutting edge.

18. 17. The joint revision general release chisel blade of claim 16, wherein the blade shaft is rigid.

19. (a) a sharp cutting edge; (b) a blade projection defining an elongated curved cutting edge; (c) a straight, elongated cutting edge; (d) a blade shaft; (e) Blade insert plate for anterior and posterior release in joint revision surgery.

20. 20. The joint revision anterior and posterior release blade of claim 19, wherein the pointed tip cutting edge, the elongated curved cutting edge, and the straight elongated cutting edge all have a bevel on one side of the cutting edge.

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