55 results about "Tibial osteotomy" patented technology

A cutting block for use in a bone osteotomy procedure is disclosed, and includes a first cutting guide surface, a second cutting guide surface, and a third cutting guide surface. The first, second, and third cutting guide surfaces are adapted to be temporarily affixed to a bone having a first side and a second side such that the first cutting guide surface is disposed on the first side of the bone, and such that the second cutting guide surface and third cutting guide surface are disposed on the second side of the bone forming an angle therebetween.

A method for reconstructing a knee ligament and for performing a tibial osteotomy on the knee in a single procedure, the method comprising:

forming a bone tunnel through the tibia at a location appropriate for the ligament reconstruction, disposing a graft ligament in the bone tunnel, and securing the graft ligament in the bone tunnel, and forming a wedge-like opening in the bone at a location appropriate for the tibial osteotomy, positioning an osteotomy implant in the wedge-like opening in the bone, and securing the osteotomy implant in the wedge-like opening in the bone;

wherein the osteotomy implant is secured in the wedge-like opening in the bone with a fastener which extends through the implant and into the bone tunnel.

Apparatus for performing an open wedge, high tibial osteotomy, the apparatus comprising: a wedge-shaped implant for disposition in a wedge-shaped opening created in the tibia, wherein the wedge-shaped implant comprises a hole extending therethrough; a fixation screw for extending through the hole and securing the wedge-shaped implant to the tibia; and a locking mechanism for releasably locking the fixation screw to the wedge-shaped implant.

Apparatus for performing an open wedge, high tibial osteotomy, the apparatus comprising: a fixation screw for securing an implant to the tibia, the fixation screw comprising: a shaft having a distal threaded portion and a proximal threaded portion, wherein the distal threaded portion and the proximal threaded portion are characterized by different thread pitches.

Apparatus for performing an open wedge, high tibial osteotomy, the apparatus comprising:

• • cutting apparatus for forming an osteotomy cut in the tibia, the cutting apparatus comprising:
    • targeting apparatus for identifying a cutting plane through the tibia and a boundary line for terminating a cut made along the cutting plane, wherein the boundary line is located within the tibia, parallel to the anterior-posterior slope of the tibia and parallel to the sagittal plane of the patient.

A method for performing an open wedge, high tibial osteotomy, the method comprising:

• • positioning targeting apparatus for identifying a cutting plane through the tibia and a boundary line for terminating a cut made along the cutting plane, wherein the boundary line is located within the tibia, parallel to the anterior-posterior slope of the tibia and parallel to the sagittal plane of the patient;
  • cutting the bone along the cutting plane, with the cut terminating at the boundary line;
  • moving the bone on either-side of the cut apart so as to form the wedge-like opening in the bone; and
  • stabilizing the bone.

An osteotomy plate for maintaining the spacing of a wedge-like opening in bone, the osteotomy plate comprising: a body having a front side and a back side; a key extending out of the back side of the body for disposition in a keyhole formed in the bone along the wedge-like opening; and a plurality of mounting holes for receiving fixation screws therein, the mounting holes being formed in the body such that when the key is disposed in the keyhole, the mounting holes direct the fixation screws into bone on either side of the wedge-like opening.

Apparatus for performing an open wedge, high tibial osteotomy, the apparatus comprising a wedge-shaped implant for disposition in a wedge-shaped opening created in the tibia, wherein the wedge-shaped implant comprises at least one key for disposition in at least one corresponding keyhole formed in the tibia adjacent to the wedge-shaped opening created in the tibia, wherein each of the at least one keys comprises an interior bore for receiving a fixation screw, at least one fixation screw for disposition in the interior bore of the at least one key, and further wherein the apparatus is configured so that when the at least one fixation screw is received in the interior bore, the at least one fixation screw terminates within the bore.

An osteotomy implant for disposition in a wedge-shaped osteotomy opening in a bone, the implant comprising:

• • a body for disposition within the wedge-shaped osteotomy opening in the bone and supporting the bone while healing occurs;
  • at least one key formed integral with the body for stabilizing the body relative to the adjacent bone while healing occurs; and
  • at least one fenestration extending through the body for permitting bone growth through the implant.

An osteotomy implant for disposition in a wedge-shaped osteotomy opening in a bone, the implant comprising:

• • a body for disposition within the wedge-shaped osteotomy opening in the bone and supporting the bone while healing occurs; and
  • at least one key formed integral with the body for stabilizing the body relative to the adjacent bone while healing occurs;
  • wherein at least a portion of the body and the at least one key are formed out of a relatively strong, load-bearing material whereby to stabilize the bone during healing;
  • and further wherein at least a portion of the body is formed out of a bone growth-promoting material whereby to enhance bone healing across the osteotomy opening in the bone.

The present invention comprises a novel method and apparatus for performing an open wedge, high tibial osteotomy. More particularly, the present invention comprises the provision and use of a novel method and apparatus for forming an appropriate osteotomy cut into the upper portion of the tibia, manipulating the tibia so as to open an appropriate wedge-like opening in the tibia, and then mounting an appropriately-shaped implant at the wedge-like opening in the tibia, so as to stabilize the tibia with the desired orientation, whereby to reorient the lower portion of the tibia relative to the tibial plateau and hence adjust the manner in which load is transferred from the femur to the tibia.

The invention discloses an angle measurement device and method for tibial osteotomy in total knee replacement, and belongs to the field of medical apparatus systems. The angle measurement device comprises a positioning tool positioning a lower extremity force line of a patient, an osteotomy tool, an angle measurement part measuring the front inclination angle and the back inclination angle of tibial osteotomy in total knee replacement and a computer system; the positioning tool comprises three rigid rods, and the three rigid rods are the first rod, the second rod and the third rod in sequence;the angle measurement part comprises a motion sensor, a processor for processing motion-sensor data and a wireless information transmission part. By means of the angle measurement device and method for tibial osteotomy in total knee replacement, a front inclination angle value and a back inclination angle value of tibial osteotomy can be accurately computed, and are visually displayed on a display to assist doctors in tibial osteotomy; the previous measurement randomness and conditions of relying on surgeon experiences are reduced, the measurement reliability is improved, and surgery efficiency is also improved.

Surgical devices, kits and methods of using thereof are described. Generally, the surgical kit includes an osteotomy guide device and/or a bone spacer guide device. The surgical kit can be used in a surgical method for correcting a malalignment of the knee joint that involves performing a fibular osteotomy and/or a tibial osteotomy, and/or administering stem cells. Generally, the osteotomy guide device is configured to allow drilling to occur around the tibia and across a horizontal cross-sectional plane of the tibia so that a direction of each of the drill holes that are formed in the tibia is substantially parallel to or on the same horizontal cross-sectional plane of the tibia. The osteotomy guide device allows drilling to be conducted efficiently and accurately.

A support plate, for supporting the two parts of a tibia after a tibial osteotomy, is generally in the shape of a T with a stem having top and bottom ends and a cross piece extending across the top end of the stem. The support plate has a rear surface arranged to contact the tibia. The rear surface of the stem is convex in its central longitudinal plane over a first region of the plate, and the rear surface of the cross piece is concave in its transverse plane.

The present invention relates to a fixing tool for an open-wedge high tibial osteotomy, and a fixing tool for an open-wedge high tibial osteotomy, which is installed on a tibia cut open due to a tibial osteotomy, includes: a fixing plate which includes a head portion that has a plurality of nut holes, and an elongated plate that has a plurality of nut holes and a long hole and is formed to protrude from one side of the head portion; screws which are coupled to the nut holes; and a block which is detachably installed in the long hole by using a fixing screw. Therefore, the fixing tool is closely fixed to a tibia, which has been cut open due to a procedure of a high tibial osteotomy, thereby enabling solid union of the tibia.

The invention relates to a progressive distracter after gonitis tibial osteotomy and belongs to the technical field of orthopedic medical devices. The progressive distracter is used for distracting agonitis tibial osteotomy part. The technical scheme is that an upper distracting plate and a lower distracting plate are rectangular flat plates respectively, the front ends of rectangles of the upperdistracting plate and the lower distracting plate in the length direction are connected through a rotating shaft, the rotating shaft is perpendicular to the length direction of each rectangle, the opposite plate surfaces of the upper distracting plate and the lower distracting plate are provided with threads, the threads are along the center lines of the upper distracting plate and the lower distracting plate in the length direction respectively, a distracting screw is conical, a conical rod body is circumferentially provided with a thread, and the thread of the distracting screw is matched with the threads on the plate surfaces of the upper distracting plate and the lower distracting plate. The progressive distracter is simple in structure, convenient to use and good in effect; an osteotomy gap can be progressively slowly distracted during an operation, the inner side cortex is kept intact and not broken during the operation, and the goal of placing a bone block or a polymer filler in the osteotomy gap purely to form an inner side support without needing an additional bone plate for fixation is achieved.

The invention discloses an auxiliary tool for inner side high tibial osteotomy. The auxiliary tool comprises an osteotomy guiding template comprising a main body with a fitting curved surface fitting with a curved surface in an area under the inner side of a tibial platform; a lower-side wedge-shaped tibial osteotomy guiding structure and a lower-side tibial tubercle osteotomy guiding structure are arranged on opposite surfaces of the fitting curved surfaces, a first positioning clay contacting the highest bump point of the tibial tubercle is arranged on one side of the main body, and a second positioning claw and a third positioning claw contacting the inner side of the tibial platform are arranged at the upper part of the main body. The special osteotomy guiding template provided by the invention accordant with patient condition is designed in an individualized manner and customized, and by using the special osteotomy guiding template, a doctor can rapidly perform an operation, operation time can be reduced, positioning can be accurate and convenient in the operation, osteotomy accuracy can be furthest improved, the number of fluoroscopy in the operation can be reduced, and thus an achievement ratio of operation is improved, and an infection rate in operation and a recurrence rate are reduced.

The invention discloses a gradual distraction device used after tibial osteotomy and capable of maintaining inner-side cortex to be free of fracture and belongs to the technical field of orthopedic medical instruments. The gradual distraction device is used for distracting a gonitis tibial osteotomy position. The front ends of an upper distraction plate and a lower distraction plate are connectedby a distraction plate rotating shaft, the front end of a distraction seat is connected with the rear ends of the upper distraction plate and the lower distraction plate through connection rod rotating shafts, one end of a distraction connection rod is connected with a connection rod rotating shaft while the other end of the same is connected with a pull rod rotating shaft, the rear end of the distraction seat is connected with the front end of a sleeve, a thread is formed in the rear portion of the sleeve, a spiral pull rod is positioned in the sleeve, the front portion and the rear portion of the spiral pull rod are in rotatable connection, the front end of the spiral pull rod penetrates the distraction seat and is provided with a shaft hole, the pull rod rotating shaft and the shaft hole of the spiral pull rod are in rotating fit, and the rear portion of the spiral pull rod is provided with a thread matched with the thread in the rear portion of the sleeve. By the gradual distraction device, gradual and slow distraction can be implemented on an osteotomy gap during operation to maintain the inner-side cortex to be complete and free of fracture during operation.

The invention provides an osteotomy plate and a tibial osteotomy method. The osteotomy plate comprises a fixing plate and a guide plate. The guide plate is connected with the fixing plate and is protruded out of the fixing plate along the direction which is perpendicular to plate surfaces of the fixing plate, and an osteotomy groove is formed in the guide plate along the directions of the plate surfaces of the fixing plate. According to the technical scheme, the osteotomy plate and the tibial osteotomy method have the advantages that the osteotomy plate is simple in structure and is light, the single tool can have functions of four or five tools in the prior art, and accordingly osteotomy operation can be simplified; the osteotomy plate is in an integral design, accordingly, cracking risks in osteotomy procedures due to diversified welding tools can be prevented, and the problem of osteotomy termination due to breakage of osteotomy tools can be solved; knee joints required to be subjected to osteotomy are subjected to osteotomy at 90-degree flexed positions in osteotomy procedures by the aid of the traditional osteotomy tools, but can be subjected to osteotomy at the 90-degree flexed positions by the osteotomy plate and also can be subjected to osteotomy at extension positions by the osteotomy plate, accordingly, lower extremity force lines can be measured while the knee joints are subjected to osteotomy, and the osteotomy accuracy can be improved.

The invention discloses a tibial osteotomy positioning device. The tibial osteotomy positioning device comprises a bracket, wherein torsional caps are arranged at one end of the bracket, a torsional spring is arranged in each of the torsional cap, a fixing pin penetrates through the inner part of each torsional cap, a ratchet wheel sleeves the corresponding fixing pin, a clip is connected to one end of each ratchet wheel, pressing rods are arranged in the bracket, a guide block is arranged at the other end of the bracket, a cup head pin and a No.1 button are arranged in the guide block, a connecting shaft is arranged at the other end of the guide block, a connecting block is arranged at the other end of the connecting shaft, a No.2 button is arranged in the connecting block, a sleeve is arranged at the upper end of the connecting block, a positioning rod and a locking rod are arranged in the sleeve, a No.3 button is arranged at the upper end of the locking rod, and a No.4 button is arranged at the upper end of the sleeve. The tibial osteotomy positioning device can accurately position and determine the cutting off angle of a back rake angle of a tibial platform, and errors caused by that during an artificial knee replacement surgery, the angle of the back rake angle of the tibial platform is determined by naked eyes, can be avoided.

The invention relates to the field of orthopaedic surgical operation instruments, and provides an osteotomy system for knee arthroplasty. The system includes a tibial osteotomy locator, a femoral osteotomy locator, a force line-angle meter and the like. The tibial osteotomy locator is shaped as an ancient Chinese character 'cao' (which means 'grass' in English). The femoral osteotomy locator is divided into a type1 femoral osteotomy locator and a type 2 femoral osteotomy locator. The type 1 femoral osteotomy locator is approximately shaped as the ancient Chinese character 'cao' with two side arms flush with the front end of an intermediate arm. The type 2 femoral osteotomy locator is approximately shaped as the ancient Chinese character 'cao' with a horizontal line extending out of two side arms. The force line-angle meter is used for measuring whether the osteotomy surface is perpendicular to a force line on the coronal plane of femur and tibia and for measuring the posterior slope ofan osteotomy groove on the tibial plateau during the operation. In the process of artificial knee replacement using posterior stable prosthesis, an osteotomy measurement technology and a gap balancetechnology are integrated to improve the accuracy of tibial osteotomy, femoral osteotomy and reconstructed knee joint force line.

The present invention relates to a fixing tool for an open-wedge high tibial osteotomy, and the fixing tool for an open-wedge high tibial osteotomy, which is installed on a tibia cut open due to an open-wedge tibial osteotomy, includes: a fixing plate which includes a head portion that has a plurality of head nut holes, and an elongated plate that has an upper nut hole, a lower nut hole, and a long hole formed between the upper nut hole and the lower nut hole, and protrudes from one side of the head portion; screws which are coupled to the head nut holes, the upper nut hole, and the lower nut hole so as to fix the fixing plate to the tibia; and a support screw which is installed by being moved along the long hole formed to be spaced apart at a predetermined interval from the upper nut hole formed at a side adjacent to the head portion. Therefore, the fixing tool is closely fixed to a tibia, which has been cut open due to a procedure of a high tibial osteotomy, thereby enabling solid union of the tibia.