Surgical sagittal blade cartridge having reinforced guide bar

Abstract

To provide a surgical sagittal saw cartridge including a guide bar formed by an inside plate having a head and outside plates facing each other.SOLUTION: A cartridge has blades arranged with respect to a head of an inside plate. The inside plate is formed so as to have an inside small portion and two outside small portions facing each other. The inside small portion is formed so as to define the head arranged with the blades facing each other. The outside small portions extend in front of the inside small portion in order to define a space of the outside small portions on which the blades are seated.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention comprises a stationary guide bar and a blade head pivotally mounted to the guide bar. More particularly, the present invention relates to a surgical sagittal blade cartridge having a reinforced The present invention relates to a surgical sagittal blade cartridge having a guide bar. [Background technology]

[0002] The sagittal saw blade is a surgical instrument having a head that pivots about an axis perpendicular to the blade. Patent Documents 1 and 2 each disclose a surgical saw blade cartridge. The disclosures of which are incorporated herein by reference. The blade cartridge includes a stationary guide bar and a blade head. a handpiece that operates the cartridge, i.e., a fine-grained saw blade that is removably attached to the saw; The blade head is pivotally attached to the guide bar. The blade head has teeth extending forward from the bar. One or more drive links are The drive link extends from the drive assembly in the saw to the proximal end of the guide bar. The reciprocating movement of the drive link causes the blade head to pivot back and forth. This pivoting of the blade head causes the teeth to penetrate the tissue against which the blade head is pressed. This type of cartridge is an oscillating tip saw blade cartridge. It is also sometimes called a ji.

[0003] The advantage of the sagittal blade cartridge is that the only part of the cartridge that pivots is located distally. In comparison, a conventional sagittal saw blade has a blade head that is The cartridge pivots from its mounting point on the handpiece when activated. The surgeon's hand holding the blade vibrates very slightly. Proper positioning of the sagittal saw blade relative to the tissue that the saw is intended to resect is essential. When a conventional blade is activated, the vibration motion of the blade causes Significant wear occurs on the surfaces of the cutting guide that define the slot in which the blade seats. The guide bar of the blade cartridge moves very little within this slot. Therefore, by using a cartridge instead of a conventional blade, a cutting guide can be formed. This means that very little material is worn away from the guide. Reducing the extent to which the reduced cutting guide material must be flush with the surgical site Furthermore, the use of a vibrating tip blade allows the material forming the guide to be This reduces the degree to which the blade itself is worn to the point of being useless.

[0004] The surgical sagittal blade cartridge has other advantages over conventional sagittal saw blades: The guide bar is stationary when the blade head is activated. Or you can press two fingers against the guide bar. This will prevent the cartridge from being cut. The cartridge can be easily held in the desired position as it is advanced towards the tissue to be cut. become.

[0005] When either a conventional sagittal blade or a sagittal blade cartridge is advanced into the bone, The blade head experiences resistance, which becomes significant when the cut is deeper than 5 cm. In many cases, the bone located adjacent to the underside of the cartridge is directly above the cartridge. As with most mechanical devices, the cartridge provides a greater cutting resistance than the bone in which it is located. When moving forward, it moves along the path of least resistance. The cartridge has less cutting resistance than the bone under the ridge, so as it advances, it makes the desired cut. This upward deflection of the blade is called "skiving." Also, depending on the density of the bone, the cartridge will It may also deflect downwards. This type of deflection is known as "diving." .

[0006] Regardless of the direction in which the blade is deflected, the deflection is undesirable because the sagittal saw blade Cartridges are typically created by removing bone and inserting a bone replacement into the space previously occupied by the removed bone. The implant is attached to the tooth. The implant is formed to have a surface designed to seat precisely on a complementary surface of the bone to which it is attached. If the cut does not leave a surface in the bone with the desired shape, the implant placement procedure The placement results will not be optimal.

[0007] Theoretically, by increasing the thickness of the guide bar, the surgical sagittal blade cart This increases the rigidity of the ridge. However, the length of the cutting guide into which the cartridge is inserted is It should be understood that the holes tend to be relatively narrow. In many cases, the height of the slots is This height is about 1.5 mm or less. This limits the bar thickness. Furthermore, if the guide bar thickness increases, Therefore, it is necessary to increase the cutting thickness formed by the cartridge. If the cartridge becomes too large, it may produce a cut surface that does not have the desired flatness. Therefore, increasing the thickness of the guide bar usually reduces the deflection of the cartridge. This does not provide a viable solution for [Prior art documents] [Patent documents]

[0008] [Patent Document 1] International Patent Application Publication No. 2006 / 017066A2 / U.S. Patent No. 7,497,860 [Patent Document 2] International Patent Application Publication No. 2007 / 030793A2 / U.S. Patent No. 7,704,254 Summary of the Invention

[0009] The present invention relates to a new and useful surgical sagittal blade cartridge. The guide cartridge is designed to resist deformation when subjected to uneven resistance. It is equipped with

[0010] The surgical sagittal blade cartridge of the present invention has a guide formed by three plates. The device is provided with an upper plate and a bottom plate facing the upper plate. Between the top and bottom plates is an inner plate. The plate is formed with a curved head. The curved head is It acts as a boss around which the ridge blade head pivots.

[0011] In many aspects of the invention, the medial plate has a base that forms the proximal end of the plate. Three small sections extend forward from the base. Two outer small sections and and an inner sub-portion, these sub-portions being spaced apart from one another in the lateral direction. The part is formed with a curved head that acts as a pivot boss. When the cartridge with the guide bar is assembled, a drive that pivots the blade head is The link will be located in the space between the inner and outer subsections.

[0012] In some versions of the invention, the outer subportion extends distally and anteriorly to the inner subportion. Thus, in these versions of the invention, the outer minor portion extends forward of the pivot boss. In these versions of the invention, the base of the blade head is located on the outer (forward of the pivot boss) It should be understood that the side portions are disposed between spaced apart areas of the side portions.

[0013] In aspects of the invention where the outer subsections extend forward of the inner subsections, the outer subsections are oriented toward one another. The outer portion is formed with an inwardly extending lobe. These distal sections reinforce the guide bar and reduce the likelihood of guide bar deflection. do.

[0014] In some embodiments of the invention, the plates forming the guide bar are made of three different plates. These plates are welded together or otherwise attached to form the guide bar. In some embodiments of the present invention, two of these plates are fixed by the method The above may be machined, molded, or otherwise assembled as a single unit. This is how it is formed.

[0015] The invention is pointed out with particularity in the claims. The advantages and benefits of this invention will be better understood by reading the following detailed description in conjunction with the accompanying drawings. cormorant. [Brief explanation of the drawings]

[0016] [Figure 1] FIG. 1 is a perspective view of a saw and surgical sagittal blade cartridge assembly of the present invention. [Figure 2] FIG. 2 is an exploded view of the cartridge of the present invention. [Figure 3] FIG. 2 is a plan view of the inner plate of the cartridge of the present invention. [Figure 4] FIG. 10 is a plan view of an alternative inner plate of the cartridge of the present invention. [Figure 5] FIG. 10 is a plan view of an alternative assembly integral with the cartridge of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0017] FIG. 1 illustrates an assembly 30 of the present invention. The assembly 30 is a surgical sagittal blade. The saw 32 includes a body or a saw blade 60 removably attached thereto. The housing 34 includes a housing 34. In the illustrated embodiment of the invention, the housing 34 includes: The head 38 is piston-shaped and is adapted to receive the proximal end of the cartridge 60. (Here, "proximal" refers to the side of the saw that faces the surgeon holding the saw 32.) is understood to mean towards, i.e. away from, the site to which cartridge 60 is applied. "Distal" refers to the side away from the surgeon holding the saw, i.e., the side facing the cart. (It should be understood that this means the direction toward the area where the ridge 60 is applied.) The saw head 38 is slidably mounted thereon (note that the head of the connecting rod 40 is not shown). When the connecting rod 40 is in the operating position, a part of the rod is pressed against the cartridge. , holds the cartridge in the head. When the connecting rod 40 is in the loading position, the connecting rod 4 0 does not press the cartridge 60. This allows the cartridge 60 to be removed from the head. This allows the cartridge to be removed and a new cartridge to be removably attached to the head. A wing nut 42 attached to the connecting rod 40 moves the connecting rod 40 between the working position and the loading position. It is now possible to do this.

[0018] A motor 48, represented by a virtual cylinder, is located within the barrel of the housing 34. The motor 48 is connected to a pair of drive pins 50 (one of which is labeled with a part number). The drive pin 50 is attached to the head 38 and is positioned so that the cartridge 60 is seated therein. These drive pins 50 project above the surface of the bearing. A trigger located below the saw head 38 is attached to the head 38 to perform the action. 52 is a manual actuating member that is depressed to control the operation of the saw. The power supply that provides the signal is not shown. Often this power supply is located within the saw housing 34. The battery or power cord is attached to the base of the gripping portion of the device.

[0019] The cartridge 60 shown in FIG. 2 includes a guide bar with a blade 136 attached. 62. The blade 136 is attached to the distal section of the guide bar 62 and Drive links 112 extend proximally from either side of blade 136. The drive link 112 terminates at a location forward of the proximal end of the guide bar 62.

[0020] The guide bar 62 is connected to a bottom plate 64, an inner plate 66 disposed on the bottom plate 64, and a laminated structure including an inner plate 76 and an upper plate 102 disposed on the inner plate 76; Therefore, the inner plate 76 is located between the two outer plates, i.e., the bottom plate 6 4 and upper plate 102. Together, these plates form the The side bar 62 is formed to have a proximal section 63. The proximal section 63 is From the proximal end of the proximal section, the proximal section tapers outward first and then inward. Anterior to region 63, the guide bar has a central region 66 and a distal region 68. The plates 64, 76, and 102 are guide bars that form both sides of the central and distal sections 68. The central and distal sections of the bar are formed so that the opposing sides are parallel. The width across the section 68 is less than the width across the outwardly tapered portion of the proximal section 63 of the bar. It is also smaller than before.

[0021] The bottom plate 64 has two laterally spaced apart proximal ends immediately forward of its proximal end. The housing is formed to have openings 67 (each of which is assigned a part number). Each opening 67 has a curved periphery facing the proximal end of the plate and a cartridge periphery facing the proximal end of the plate. In front of the opening 67, the bottom plate has a straight periphery facing the distal end of the edge. The port is formed with a keyhole-shaped opening 69. The opening 69 has a maximum width of The opening is shaped to receive the head of the connecting rod 40 of the saw. 69 has its centerline along the proximal-distal longitudinal axis along the guide bar 62. Plate 64 is positioned such that the narrow portion of opening 69 is distally forward of the wide portion of the opening. Further formation is taking place.

[0022] The bottom plate 64 has two openings 70 (one labeled with the part number) on the proximal side of the distal plate. Each opening 70 is aligned with a respective one of the openings 67. The openings 70 are aligned in a straight line in the hand direction. The orientation of the opening 70 is opposite to that of the opening 67. That is, the curved end of the opening 70 faces the distal side. The straight edge of the opening 70 faces toward the proximal end of the plate 64. In front of the opening 70, the bottom plate 64 has two elongated The device is formed to have long holes 72 (each of which is assigned a part number). , its vicinity (located near the edge of the adjacent opening 70 and closest to the long axis of the plate 64) In front of the proximal end, the slot 72 faces the side edge of the plate. The slot 72 is spaced proximally from the distal end of the plate 64. It terminates at the

[0023] As best seen in FIG. 3, medial plate 76 forms the proximal end of the plate. The base 78 is formed of three laterally spaced apart subsections 8 Extending forward from base 78 are subsections 80, 86, and 99. The outer surfaces of the small portions 80, 99 are in contact with the plate 76 which forms the outer surface of the guide bar 62. Therefore, the outer subsections 80, 99 extend forward from the plate base 78. The proximal section has a proximal section that is initially tapered inward and then tapered outward. The outer subsections 80, 99 are symmetrically arranged with respect to the longitudinal axis of the guide bar 62. The outer subsections 80, 99 are further shaped to be mirror images of each other. Adjacent the distal end of each of the subsections 80, 99, each subsection extends longitudinally along the center of the plate 76. to have tabs 82 (one bearing a part number) extending inwardly toward the mandrel. Proximal to the tab 82, each subsection 80, 99 is formed along the length of the plate 76. It has lobes 84 (one of which is labeled with a part number) extending inwardly toward the central axis. From the proximal side to the distal side along the small portion 80 or 99, The associated lobes 84 are first curved inward and then curved outward. 76 is shaped so that lobe 84 is spaced proximally from tab 82 .

[0024] The inner portion 86 of the inner plate 76 has its centerline located on the long axis of the plate. The small portion 86 is formed with a keyhole opening 90. The inner plate 76 is , the opening 90 has the same shape as the opening 69 in the bottom plate 64 and is aligned in line with the opening 69. The inner portion 86 is shaped so that it is positioned to be aligned with the inner portion 86 except for its distal end. At its most distal end, the small portion 86 has a curved distal surface. The small portion has a head 95. Between the small portion and the constant width area of the head 95, the small portion has a The portion has a neck 94. The neck 94 is curved inwardly relative to the head 95. It has an aspect that faces the future.

[0025] Since the sub-portions 80, 86, and 99 are spaced apart from one another, each of the outer sub-portions 80 and 99 and the inner A long and narrow slot 96 with one end closed is formed between the small side portion 86. The proximal end is the closed end of the slot. When cartridge 60 is assembled, each slot 96 has: The inner plate 76 is disposed over each pair of openings 67, 70 in the bottom plate 64. The proximal end portion 98 of the hole 96 has a shape substantially identical to the shape of the opening 67 in the bottom plate. Therefore, the lateral width of the proximal end portion 98 of each slot 96 is The width of the distal anterior slot 96 of the distal section is greater than the width of the distal anterior slot 96 of the distal section.

[0026] Returning to FIG. 2, it is seen that the top plate 102 has a perimeter that is substantially the same as the perimeter of the bottom plate 80. It can be seen that the upper plate 102 is shaped to have a proximal end in front of it. The plate 102 has two openings 104 (one of which is marked with a part number). The opening 104 has the same shape as the opening 67 in the bottom plate. 7. In front of the opening 104, the upper plate The upper plate 102 is formed with an oval opening 106. When the bar 60 is assembled, the opening 106 is positioned over the opening 90 in the inner plate, The upper plate 102 is formed so as to surround the opening 90. 8 (each of which is labeled with a part number). The opening 70 has the same shape as the opening 70 in the bottom plate and is shaped to be aligned with the opening 70. It has been completed.

[0027] The blade 136 is formed with a centrally located web 142. The cord 136 is configured so that the web 142 has a thickness no greater than the thickness of the inner plate 76. The web 142 of the blade 136 shown in FIG. When the blade 136 is positioned at a center position within the guide bar 62, the web 142 The main axis is collinear with the main axis of the guide bar. The guide bar extends proximally from the web 142. The blade 136 has two legs (one The legs 138 are shaped to have a thickness of the web 142. Each leg 138 extends from the open end of the adjacent slot 96 in the inner subsection 86 to the open end of the adjacent slot 96 in the inner subsection 86. An opening 140 extends vertically through each leg 138. In this case, the blade 136 is formed with a curved proximal surface 144. The blade 136 has a blade surface 144 seated against the head 95 integral with the inner subsection 86, The blade foot 13 is shaped so that it can pivot around the head 95. 8 and web 142 are sometimes referred to as the base of blade 136.

[0028] The distal end of the blade web 142 extends to the distal end of the guide bar 60. A head 146 is integral with and extends forward of the distal end of the web 142. The head 146 of the blade 136 has teeth 148 formed thereon. 2. More specifically, The head is configured so that the kerf formed by the cutting action of the blade 136 receives the guide bar 60. The insulating film is formed to have a thickness sufficient to allow the insulating film to be inserted.

[0029] A drive link 112 is disposed in each of the slots 96 in the guide bar 62. The drive link 112 is in the form of a flat strip of metal. Each foot is formed so that a part number is attached to the link. 114 has a through hole 116 (one of which is marked with a part number) located at its center. The through holes 116 allow the associated drive rod feet 114 to be attached to the drive pins of the saw head. Each drive link 112 is sized to be mounted on the drive link 50. is shaped so that it has a thickness greater than the thickness of the metal piece that forms the body of the link. The thickness of the legs 114 is usually not greater than the thickness of the guide bar 62. When the assembly is assembled, the feet 114 are generally seated within the proximal end portions 98 of the associated slots 96. The portion of each link 112 that projects outward from its body, namely, a foot 114, fits through bottom plate opening 67. and seated within upper plate opening 104.

[0030] Two fingers 118 (one labeled with a part number) are attached to the body of each drive link 112. The fingers 118 extend distally forward from the distal end of the More specifically, the fingers 118 are spaced apart such that the blade feet 138 are Spaced apart far enough to allow seating between pairs of fingers Each finger 118 has a hole 120 formed therein. The holes 120 are aligned in a straight line with each other.

[0031] As part of the process of assembling the cartridge of the present invention, the blades 136 are The drive link is positioned so that the drive foot 138 is disposed between a pair of drive link fingers 118. A pivot pin 122 (part number 122) extends through the finger hole 120 and the blade foot opening 140. ) pivotally retains the leg 38 to the associated drive link 112. It is.

[0032] During assembly of cartridge 60, inner plate 76 is first attached to either bottom plate 64 or top plate 66. After this step is completed, The drive link / blade assembly is secured such that the drive link 112 is seated within the slot 96 and the blade The curved proximal surface 144 of the head 136 is curved relative to the curved portion of the head 95 integral with the medial plate 76. The upper plate 102 or The bottom plate 64 is welded or otherwise attached to the exposed surface of the inner plate 76. At the end of the cartridge 60 assembly process, the drive link feet 11 4 seats in plate openings 67, 104. Fingers 118 of the drive link are The openings 70, 102 are formed in the bottom plate 64 and the top plate 102 of the guide bar, respectively. 08. The blade head 146 is located just forward of the distal end of the guide bar 62. This will be done.

[0033] As can be seen in FIGS. 1 and 2, the cartridge 60 includes two parallel ribs 150. Ribs 150 extend upward from the outer surface of the upper plate 102 of the bar. The ribs are positioned so that each rib is aligned with the longitudinal axis of a respective one of the openings 104. The ribs 150 extend forward from a position approximately 2 mm forward of the opening 104. The rib 150 terminates at a position approximately 10 mm forward of the plate opening 106. The ribs 150 are formed separately from the plate 102. The ribs 150 are welded to the rest of the cartridge 60. or otherwise permanently fixed to the

[0034] International Patent Application Publication No. 2013 / 016472A1 / US Patent Application Publication No. 2014 / 0 As discussed in 163558, once assembly 30 is ready for use, Once aligned, the cartridge rib 150 is positioned above the saw head 38. No. 6,239,999, filed on Oct. 1, 2003, which is expressly incorporated herein by reference. The ribs 150 reduce deflection in the area of the cartridge 60 located above the saw head 38. This will result in...

[0035] To prepare the assembly 30 of the present invention for use, the cartridge 60 is inserted into the saw head 3 8. As a result of this attachment, each drive pin 50 is attached to a drive link foot 114 The connecting rods 40 are seated in respective ones of the holes 116 formed in the overlapping portions of the cartridge. The connecting rod 40 passes through the openings 69, 90, and 106. The head of the connecting rod contacts the surface of the inner plate 72 exposed through the upper plate opening 106. The guide bar is lowered from above to press the cartridge. The cartridge 60 is held in the saw head 38. Once the cartridge 60 is secured to the drive head, the drive The drive pin and drive link cooperate to bias the blade 136 proximally. The positioning surface 144 is biased against the curved surface of the head 95 within the cartridge 60 .

[0036] Depressing trigger 52 actuates assembly 30. When the motor 44 is operated, the drive pin 50 vibrates back and forth. This movement of the drive pin 50 causes the drive links 112 to reciprocate back and forth relative to one another. As the moving links 112 move back and forth relative to each other, the blades pass through the heads 95 within the guide bars 62. This pivoting of the blade teeth 148 causes them to rotate back and forth as the cartridge This will cut the tissue against which it is pressed.

[0037] During the advancement of the cartridge 60, it is subjected to a resisting force. 6 provides structural strength to the guide bar 62. This structural strength is required to withstand these forces. This limits the amount of deflection of the bar 62 when the guide bar 62 is pulled. The area of the outer subsections 80, 99 extending forward of the head 95 of the inner subsection 86 Tabs 82 and lobes 84 are structured on the guide bar at the distal portion of the guide bar. This distal portion is the portion of the guide bar that is first exposed to resistive forces. Thus, the presence of tabs 82, 84 prevents the distal portion of the guide bar from being skived or This further reduces the possibility of diving. By preventing skiving or diving, the entire cartridge 60 can be skived or This will reduce the possibility of diving.

[0038] A further feature of the present invention is that both sides of the drive link 112 are enclosed within the inner plate 76. This means that if the cartridge is activated, the surgeon will be able to When holding or touching the side, the surgeon's fingers do not come into contact with the reciprocating drive link 112. At the very least, this means that the surgeon's fingers are in contact with the moving drive link. A further advantage of this configuration of the present invention is that the pouch is essentially impossible to tear. This facilitates efficient welding of the side portions of the guide bars 62. This side welding of the plates 64, 76, 102 to form side welds along both sides of This will help strengthen the guide bar.

[0039] FIG. 4 shows an alternative inner plate 160 forming part of the guide bar of the cartridge of the present invention. The inner plate 160 has the base 78 of the inner plate 76. Outer subsections 162, 170 extend forward from base 78. These outer subsections 162, 170 are laterally spaced apart from the inner subportion 165. The proximal portion of 2,170 has the same shape as the proximal portion of sub-portions 80 and 99. The distal portions of the portions 162, 170 are single pieces that project inward toward the longitudinal axis of the plate 160. This single protrusion is a lobe 164. From proximal to distal along portions 162 or 170, the lobes are divided into inner subportions 165 The small diameter portion of the head 95 is located somewhat proximal to the distal end of the head 95 (toward the longitudinal axis of the plate). The lobes 164 extend outward from the head portion at the point where they have their greatest thickness. The lobes are curved so that they are positioned forward of the septum 95. From the point of maximum thickness, the lobes The distal end of each lobe 164 is curved inwardly toward the outer surface of portion 162 or 170. It is at the distal end of the subsection 162 or 170 where the lobes join together.

[0040] The inner plate 160 is formed to have an inner subsection 165. 165 has a similar shape to the inner subsection 86 described above. The difference between the two subsections is the At the proximal side of the lock 95, the inner subsection 165 is tapered. Proximally from block 95, minor portion 165 increases in width.

[0041] The inner plate 160 is one of the cartridges with a blade having a relatively wide web. It is suitable as an inner plate of the guide bar that forms part of the cartridge. The provision of tab 82 on cartridge 60 is difficult because the presence of the tab In the case of a cartridge with lobe 164, the guide bar The lobes reduce skiving or diving at locations adjacent the distal portion of the This provides the guide bar with structural strength that is useful for supporting the

[0042] Figure 5 shows an alternative component of the cartridge of the present invention. The inner plate 180 is the base of the inner plate 76 described above. The inner plates 180 are mirror images of each other. Each subsection 182 has a single lobe 184. The inner plate 180 is formed so that each lobe 184 has a small head. At a distal forward location of the blade 95, a portion extending inward from the associated subportion 182 or 197 Each lobe 184 is formed so as to extend essentially directly from the subsection 182 or 197. The small portion 182 extends perpendicular to the longitudinal axis of the inner plate 180. Anteriorly, the lobes begin to taper outward from the longitudinal axis. The end is essentially the distal end of the portion 182 or 197 integral with the lobe. The lateral thickness of the lobe proximal to the distal end of 0 is the small portion 182,1 at the proximal side of the lobe. It is larger than the lateral thickness of the 97.

[0043] The inner plate has a number of through holes (not numbered), i.e., located at the base. through holes, through holes located in the inner subsection 86, and through holes located in the lobes 184. These holes are provided for manufacturing reasons.

[0044] The drive link 196 is connected to the inner subsection 88 and the laterally spaced outer subsection 18. 2,197. Each drive link is arranged in a slot between the drive link 11 Each drive link 196 has a head 198 at its distal end. Each head 198 has teeth 199 (one set of teeth). The teeth 199 of the drive link are formed to have a 196 are spaced apart from one another along the proximal-distal longitudinal axis of the integral cartridge.

[0045] The blades 202 are positioned between the minor lobes 184. The web 210 has two legs 206 (one leg has a part number) integral with it. The legs 206 extend proximally from the web. The legs 206 are spaced apart such that the minor head 95 is positioned between the legs. The blades 202 are spaced apart so that they can seat. The teeth (each of which has a part number attached) are formed so as to extend outward from the leg 206. 204 is sized to engage teeth 199 integral with the adjacent drive link 196. The blade 202 is a curved, axially extending blade located between the legs 206 at the distal end of the web 210. The blade 136 is further formed to have a proximal surface 208. The surface 208 is Similar to surface 144.

[0046] A blade web 210 extends to the distal end of the guide bar. The head 212 is integral with the distal end of the shaft 210 and is located forward of it. The head 212 is essentially the same as the blade head 146. Teeth 148 extend forward of the head 212. do.

[0047] A portion of the lower bottom plate 220 is also shown in Figure 5. The bottom plate 220 The bottom plate 64 has a similar structure to that of the bottom plate 64 described above. The slots 72 are shown.

[0048] When a cartridge having the components of FIG. 5 is assembled, these components The drive link 196 is positioned such that the drive teeth 204 engage the teeth 199 integral with the drive link 196. The cartridge is used in the same manner as the cartridge 60 described above is used. When a carriage is used, the reciprocating motion of the drive link 196 is regulated by the engagement of the teeth 199. As a result of this engagement, longitudinal back and forth movement of the drive link is transmitted to the brake. The head 202 is then pivoted back and forth around the small section head 95.

[0049] The cartridge components of FIG. 5 are such that the outer subsections 182, 197 are adjacent to the drive link 196. It is understood that the head 198 is configured to restrict outward lateral movement of the abutting head 198. More specifically, the outer surface of the drive link head 198 is preferably 6. This restriction of the movement of the drive link head 198 When the link reciprocates to pivot the blade, the blade leg 206 pivots. It has been found that pushing the moving link head 198 away from the adjacent tooth 204 does not cause any problems. If this motion were to occur unconstrained, the drive link teeth 199 would This will result in a departure from 204.

[0050] The above description is directed to particular embodiments of the invention. Alternative forms of the invention are described. The invention may have different characteristics from those described above.

[0051] For example, various features of different aspects of the invention may be combined.

[0052] Likewise, all embodiments of the invention may not have all of the described features. In all aspects of the present invention, the outer minor portion need not extend forward of the inner minor portion. In embodiments of the invention where the lateral subsection has a distal section located anterior to the medial subsection, The side subportions do not necessarily have to include inwardly extending lobes.

[0053] Not all embodiments of the present invention need include ribs 150. The ribs may be stamped, molded, or otherwise integral with the upper plate. good.

[0054] Similarly, in some embodiments of the present invention, all or part of the inner plate 76 is a bottom plate. The upper plate 102 may be formed with either or both of the upper plate 64 and the lower plate 102. In these aspects of the invention, once the blank is formed, it is inserted into the drive rod. machined to define a slot in which the rod is seated and to define the periphery of the minor portion. Alternatively, the portions of the guide bar defining the openings or slots may be molded. It may be formed by:

[0055] In some versions of the invention, a single drive link is required to pivot the blade head. In some aspects of the invention, one or more drive links may be It is not necessary for the cartridge to be parallel to the longitudinal axis. The openings in the guide bar in which the elements of the drive links are seated are similarly aligned with the longitudinal axis of the cartridge. It does not have to be located on a line parallel to

[0056] In an aspect of the invention where at least one drive link and blade have complementary teeth, The guide may have a structure different from that shown. The bar is formed so that the blade head is not an integral part of one of the plates forming the bar. In these aspects of the invention, the blade may be centered as it pivots. The structure is a pin attached to or integral with at least one of the plates forming the bar. It is also possible.

[0057] In some embodiments of the invention, two of the plates forming the guide bar or their plates All three of the ports are welded or otherwise secured together in three different positions. In these alternative aspects of the invention, the plurality of plates may be a single unit. They may be machined as a knit or may be molded together.

[0058] The various shapes of the elements may be varied from those shown.

[0059] Therefore, it is the object of the appended claims to cover all such modifications which encompass within the true spirit and scope of the invention. and amendments thereto.

Claims

1. A guide bar (62) consisting of two outer plates (64, 102) and an inner plate A plate (76, 167, 180) is disposed between the outer plates, and the inner plate The port has a head (95) located proximally rearward of the distal end of the outer plate. , a guide bar (62), and a web disposed between the outer plates and against the head of the inner plate; (142, 210) and a head (146) positioned in front of the web. A head (136, 202) having teeth (148) formed on the head, the teeth has a thickness sufficient to form a cutout capable of receiving said guide bar. a blade (136, 202) At least one drive link (112, 113) movably disposed between the outer plates 96), wherein the at least one drive link has proximal and distal ends facing each other. the proximal end being adapted to be attached to a drive element (50) of the saw (32). The distal end is configured such that the reciprocating motion of the at least one drive link is The blade pivots about the head (95) of the inner plate of the blade bar. at least one drive link connected to the web of the blade so as to (112, 196) and A surgical sagittal saw blade cartridge (60) comprising: The inner plate (76, 167, 202) has an inner small portion (86, 165) and an inner The outer sub-portions (80, 99, 1) are located on the opposite sides of the side sub-portions. 60, 172, 182, 197), and the inner subsection is formed having The web (142, 210) of the blade defines the head (95) on which it rests. The outer portion is formed such that the web of the blade is in contact with the outer portion. extending forward of the head to be disposed within the space between the The at least one drive link (112, 196) has the inner subsection and the outer subsection. disposed in the space between one of the portions; A surgical sagittal saw blade cartridge (60).

2. The inner plate (76, 167, 202) is connected to the outer subsection (80, 99, 160 , 172, 182, 197) each having at least one lobe (82, 84, 164, 1 84), wherein the outer subportion is such that the lobe is in contact with the inner The side portions (86, 165) are located distally and forwardly of the head (95) and are straight with each other. The blade (136, 202) is further formed to face inward, and the wafer 2. The surgical saw blade of claim 1, wherein a blade (142, 210) is disposed between said subsections. Grade cartridge (60).

3. Each of the outer subportions (160, 172, 182, 197) is connected to the lobes (164, 184). Tridge (60).

4. Each of the outer sub-portions (80, 99) has a plurality of inwardly extending portions spaced apart from one another in the longitudinal direction.

3. The surgical saw blade of claim 2, wherein the saw blade is formed with two lobes (82, 84). Hard cartridge (60).

5. Each of said outer sub-portions (80, 99) has said at least one locomotive integral with said sub-portion.

3. The method of claim 2, further comprising: forming a tube (84) at a distal end of said small portion. A surgical saw blade cartridge (60) according to any one of claims 1 to 4.

6. Two drive links (112, 196) are attached to the blades (136, 202). a drive link (142, 210) connected to the drive link (142, 210) and extending distally from the web (142, 210); Each drive link has an inner subsection (86, 165) and an outer subsection (80, 99, 160, 172, 182, 197) so as to be located within a separate space between the The surgical saw blade according to any one of claims 1 to 5, wherein the blade is disposed on both sides of the inner small portion. Hard cartridge (60).

7. The guide bar (62) is connected to a connecting member (4) that holds the guide bar to the saw (32). 0), A surgical saw blade cartridge (60) according to any one of claims 1 to 6.

8. The guide bar (62) has openings (67, 104) formed therein. , the proximal end of the at least one drive link is connected to the drive element (50) of the saw (32). A surgical saw blade according to any one of claims 1 to 7, adapted to be connected to Cartridge (60).

9. The at least one drive link (112) is pivotable to the web of the blade. The surgical saw blade cartridge of any one of claims 1 to 8, （６０）。

10. The at least one drive link (196) has teeth at the distal end of the drive link. It is designed to The at least one web (210) of the blade (202) has teeth. and the web teeth are adapted to engage the teeth of the at least one drive link. positioned and shaped to A surgical saw blade cartridge (60) according to any one of claims 1 to 8.

11. The plates (64, 76, 102, 167, 180) forming the guide bar are At least two plates fastened together to form the guide bar (62) The surgical saw blade cartridge according to any one of claims 1 to 10, ６０）。

12. The outer plate (64, 102) and the inner plate (76, 167, 180) , which are three separate plates fastened together to form the guide bar (62); A surgical saw blade cartridge (60) according to any one of claims 1 to 10.

13. a proximal end and a distal end facing each other, and a cavity extending proximally inward from the distal end; a guide bar (62) having a pivot boss located adjacent the proximal end of the cavity; a web positioned within the cavity of the guide bar so as to be positioned adjacent to the pivot boss; A blade (202) having a head (146) and a blade (212) Teeth (148) are formed, said teeth being cut to receive said guide bar. a blade (202) having a thickness sufficient to form a mouth; At least one drive link (196) movably disposed between said outer plates; The drive link has a proximal end and a distal end facing each other, and the proximal The distal end is adapted to be attached to a drive element (50) of a saw (32), The end is such that the reciprocating motion of the drive link is centered on the pivot boss (95) in the guide bar. connected to the web of the blade to cause the blade to pivot. At least one drive link (196); A surgical sagittal saw blade cartridge (60) comprising: The at least one drive link has teeth (199) at a distal end of the drive link. It is formed as follows: The web pivotally connects the blade to at least one drive link. The drive link is formed with teeth (204) that engage with the teeth (199) of the drive link. It is being A surgical sagittal saw blade cartridge (60).

14. The guide bar (62) comprises two outer plates (64, 102) and an inner A plate (76, 167, 180) is disposed between the outer plates and the inner plates The plate has a head (95) located proximally rearward of the distal end of the outer plate. the law of nature, The blade (202) is positioned against the head of the inner plate. The surgical sagittal cartridge (60) of claim 13.

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