A femoral condyle distal bone defect osteotomy locator

Abstract

The embodiment of the present invention provides a distal femoral condyle bone defect osteotomy locator, including a distal femoral bone defect osteotomy module, a sliding locking positioning module and a distal femoral valgus angle positioning module, the sliding locking positioning module is arranged at the rear of the distal femoral bone defect osteotomy module, the distal femoral valgus angle positioning module is arranged below the sliding locking positioning module, and the bottom front side of the distal femoral bone defect osteotomy module is provided with a mounting surface that fits with the anterior femoral condyle, and fits with the anterior femoral condyle to ensure the stability of the osteotomy. The present invention combines the correction of the osteotomy of the distal inner and outer bone defects of the left and right legs and the adjustment and positioning functions of the valgus angle of the left and right legs into one, and there is a continuous valgus angle of 0-9° to be selected and adjusted, which greatly facilitates the positioning of the valgus angle of the distal femoral osteotomy by the doctor, and the 5mm or 10mm precise correction of the distal inner and outer bone defects of the femur improves the surgical efficiency, simplifies the surgical operation, and is as convenient as possible for the doctor to use, while ensuring the safety of the patient after surgery.

Description

Technical Field

[0001] The invention relates to the technical field of medical devices, and in particular to an osteotomy positioner for a distal femoral condyle bone defect, which is used in total knee replacement surgery. Background Art

[0002] The knee joint is the largest and most complex joint in the human body. Knee replacement is a surgery that replaces all or part of the patient's damaged natural knee joint with a knee prosthesis. Nowadays, knee replacement has developed into a mature orthopedic surgery. In total knee replacement surgery, multi-plane osteotomy is required on the femoral side in order to install the femoral prosthesis.

[0003] Generally, it is necessary to first perform osteotomy at the distal end of the femur, and then use this osteotomy surface as the reference plane to measure the size of the femoral condyle, and determine the position of the osteotomy module in the next step. The distal femoral condyle bone defect osteotomy locator is mainly used to determine the valgus angle of the distal femur and then determine the amount of bone defects on the inner and outer sides of the distal femur. And a 5mm or 10mm correction is made to select a distal femoral filling prosthesis of appropriate specifications. The position of the osteotomy module is generally determined by referring to the femoral medullary cavity to determine the valgus angle and anterior-posterior position of the osteotomy module, or by using the distal femoral bone surface as a reference to determine the osteotomy position of the osteotomy module.

[0004] In the prior art, the osteotomy positioner for the distal femoral condyle bone defect is generally divided into two types, the left positioner for the left knee joint and the right positioner for the right knee joint. The operation is complicated and the instrument cost is high. In addition, only a limited number of fixed valgus angles are generally provided, such as 5° or 6°. The fixed valgus angle is difficult to meet the personalized choices of the existing population, which causes great operational limitations to the surgical operation. In addition, there is no better way to deal with the correction of the distal femoral bone defect. It depends entirely on the doctor's experience. If the doctor makes an operational error, resulting in an imbalance of the distal femoral filling prosthesis, it will directly affect the patient's physiological force line and cause the operation to fail. Summary of the invention

[0005] The present invention provides an osteotomy locator for distal femoral condyle bone defect, which has a simple structure, is easy to operate, is common to both left and right sides, has adjustable valgus angles of 0°, 3°, 5°, 7°, and 9°, and can accurately correct distal femoral bone defects N0, 5mm, and 10mm.

[0006] In order to solve the above technical problems, the embodiments of the present invention provide the following solutions: a distal femoral condyle bone defect osteotomy positioner, comprising a distal femoral bone defect osteotomy module, a sliding locking positioning module and a distal femoral valgus angle positioning module, wherein the bottom front side of the distal femoral bone defect osteotomy module is provided with a mounting surface that fits the anterior femoral condyle, and the top rear side of the distal femoral bone defect osteotomy module is provided with three correction osteotomy grooves arranged in parallel front and back;

[0007] The sliding locking positioning module is connected to the rear of the distal femoral bone defect osteotomy module, and includes a sliding locking positioning module body and a push-type locking hook, the middle part of the push-type locking hook is rotatably connected to the top of the sliding locking positioning module body, a spring is provided between the lower part of the rear end of the push-type locking hook and the sliding locking positioning module body, and the front end of the push-type locking hook is a curved hook that is detachably hooked with the correction osteotomy groove;

[0008] The distal femoral valgus angle positioning module is arranged below the sliding locking positioning module, and comprises a distal femoral valgus angle positioning module body, a valgus angle positioning sleeve, a valgus angle dial and a valgus angle pull rod, the front end of the valgus angle pull rod is plugged and fixed with the distal femoral valgus angle positioning module body, the rear end of the valgus angle pull rod extends from the rear of the distal femoral valgus angle positioning module body and is sleeved with the valgus angle positioning sleeve, and the rear of the valgus angle positioning sleeve is limited by a fixing nut screwed with the valgus angle pull rod;

[0009] The valgus angle scale is arranged above the valgus angle lever and is rotatably connected to the body of the distal femoral valgus angle positioning module, the rear end of the valgus angle scale is an arc-shaped edge, the center of the arc-shaped edge is a 0° scale point, the axis of the fastening screw, the axis of the rotating shaft and the 0° scale point are located on the same vertical plane, and the arc-shaped edge has 3°, 5°, 7° and 9° scale points on the L side to the left from the 0° scale point, and 3°, 5°, 7° and 9° scale points on the R side to the right;

[0010] The arc edge corresponds to the 0° scale point, the 3°, 5°, 7°, 9° scale points on the L side and the 3°, 5°, 7°, 9° scale points on the R side are respectively provided with dial grooves, and the front end of the eversion angle positioning sleeve is provided with a raised positioning tip, and the raised positioning tip is plugged into the dial groove.

[0011] Among them, the sliding locking positioning module also includes two parallel optical axes, and the left and right ends of the bottom plate of the sliding locking positioning module body are respectively connected to a parallel optical axis. The left and right sides of the distal femoral valgus angle positioning module body are respectively provided with a positioning sliding hole, and the two parallel optical axes are correspondingly plugged into the two positioning sliding holes.

[0012] Wherein, the left and right sides of the top of the distal femoral bone defect osteotomy module are provided with oblique nail holes for fixation, and the front side of the top of the distal femoral bone defect osteotomy module is provided with adjustable position nail holes.

[0013] Wherein, a connecting hole is provided on the rear end surface of the distal femoral bone defect osteotomy module, and a connecting rod is provided on the front end surface of the sliding locking positioning module body, and the connecting rod is plugged into the connecting hole.

[0014] Among them, two side support plates are provided on the top of the sliding locking positioning module body, and a spring mounting hole is provided on the connecting surface between the two side support plates. A spring plugged into the spring mounting hole is provided below the rear end of the push-type locking hook, and the middle part of the push-type locking hook is supported and positioned between the two side support plates by a support shaft, and the front end of the push-type locking hook is a bent hook that is detachably hooked with the revised osteotomy groove.

[0015] Among them, the body of the distal femoral valgus angle positioning module includes an upper side plate and a lower side plate, and a lever hole is provided between the upper and lower side plates to the front end. The front end of the valgus angle lever is inserted into the lever hole and fixedly connected to the upper side plate by a fastening screw, and the valgus angle dial is arranged between the valgus angle lever and the upper side plate. A rotating shaft is provided at the rear end on the center line of the upper side plate, and the front end of the valgus angle dial is rotatably connected to the upper side plate through the rotating shaft.

[0016] Among them, the correction sizes of the three correction osteotomy grooves are 0, 5mm and 10mm respectively.

[0017] Among them, the push-type locking hook is provided with a plurality of ridges, which increases the friction and makes the doctor feel better when pressing.

[0018] Wherein, an anti-separation mechanism is provided at the lower end of one of the parallel optical axes.

[0019] Among them, one of the two positioning sliding holes is a circular hole, and the other is an elliptical hole.

[0020] The above solution of the present invention includes at least the following beneficial effects:

[0021] The present invention combines the correction of osteotomy of the medial and lateral bone defects of the distal femoral condyles of the left and right legs and the adjustment and positioning functions of the valgus angles of the left and right legs into one, and has a continuous valgus angle of 0-9° available for selection and adjustment, which greatly facilitates the doctor's positioning of the valgus angle of the distal femoral osteotomy, and can accurately correct 5mm or 10mm medial and lateral bone defects of the distal femur, thereby improving surgical efficiency and simplifying surgical operations, making it as convenient as possible for doctors to use while ensuring the patient's safety after surgery. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of the present invention;

[0023] Figure 2 It is a front view of the present invention;

[0024] Figure 3 It is a left side view of the present invention;

[0025] Figure 4 A top view of the present invention;

[0026] Figure 5It is an enlarged view of the structural decomposition diagram of the distal femoral bone defect osteotomy module of the present invention;

[0027] Figure 6 It is an enlarged view of the structural exploded view of the sliding locking positioning module in the present invention;

[0028] Figure 7 It is an enlarged view of the structural decomposition diagram of the distal femoral valgus angle positioning module in the present invention.

[0029] Description of reference numerals:

[0030] 1. Distal femoral bone defect osteotomy module; 11. Mounting surface; 12. Oblique nail hole; 13. Adjustable position nail hole; 14. Correction osteotomy groove; 15. Connecting hole; 2. Sliding locking positioning module; 21. Sliding locking positioning module body; 22. Press-type locking hook; 221. Hook; 23. Parallel optical axis; 24. Connecting rod; 25. Side support plate; 26. Spring mounting hole; 27. Spring; 3. Distal femoral valgus angle positioning module; 31. Distal femoral valgus angle positioning module body; 32. Valgus angle positioning sleeve; 321. Raised positioning tip; 33. Valgus angle dial; 331. Arc edge; 332. Dial groove; 34. Valgus angle lever; 35. Positioning sliding hole; 36. Pull hole; 37. Fastening screw; 38. Rotating shaft. DETAILED DESCRIPTION

[0031] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0032] like Figure 1-4 As shown, the present invention provides a distal femoral condyle bone defect osteotomy locator, comprising a distal femoral bone defect osteotomy module 1, a sliding locking positioning module 2 and a distal femoral valgus angle positioning module 3, wherein the sliding locking positioning module 2 is arranged behind the distal femoral bone defect osteotomy module 1, and the distal femoral valgus angle positioning module 3 is arranged below the sliding locking positioning module 2.

[0033] like Figure 5As shown, the bottom front side of the distal femoral bone defect osteotomy module 1 is provided with a mounting surface 11 that fits with the anterior femoral condyle, and fits with the anterior femoral condyle to ensure the stability of the osteotomy. The top front left and right sides of the distal femoral bone defect osteotomy module 1 are provided with oblique nail holes 12 for fixation, which are precisely matched with the fixing nails to ensure the stability of the osteotomy module. The top front side of the distal femoral bone defect osteotomy module 1 is provided with an adjustable position nail hole 13, and the top rear side is provided with three correction osteotomy grooves 14 arranged in parallel front and back, and the rear end surface of the distal femoral bone defect osteotomy module 1 is provided with a connecting hole 15. In this embodiment, the correction sizes of the three correction osteotomy grooves 14 are 0, 5mm, and 10mm respectively, to ensure the accuracy of the distal femoral correction. The distal femoral bone defect osteotomy module 1 is designed with an adjustable position nail hole. When the doctor needs to increase or decrease the amount of osteotomy, the purpose of adjusting the amount of osteotomy can be achieved by adjusting the position of the nail hole.

[0034] like Figure 6 As shown, the sliding locking and positioning module 2 includes a sliding locking and positioning module body 21, a push-type locking hook 22 and a parallel optical axis 23. A connecting rod 24 is provided on the front end surface of the sliding locking and positioning module body 21, and the connecting rod 24 is plugged into the connecting hole 15. Two side support plates 25 are provided on the top of the sliding locking and positioning module body 21. A spring mounting hole 26 is provided on the connecting surface between the two side support plates 25. A spring 27 plugged into the spring mounting hole 26 is provided below the rear end of the push-type locking hook 22.

[0035] The middle part of the push-type locking hook 22 is supported and positioned between the two side support plates 25 by a support shaft, and the front end of the push-type locking hook 22 is a hook 221 that is detachably hooked with the correction osteotomy groove 14. The push-type locking hook 22 is provided with a plurality of convex edges, which increases the friction and makes the doctor feel better when pressing. The push-type locking hook 22 ensures the safety and smoothness of installing and removing the osteotomy module.

[0036] The left and right ends of the bottom plate of the sliding locking positioning module body 21 are respectively connected to a parallel optical axis 23 to ensure free sliding up and down, and an anti-detachment mechanism is designed for the parallel optical axis on one side to ensure the safety of the instrument during the transfer process during surgery.

[0037] like Figure 7 As shown, the distal femoral valgus angle positioning module 3 includes a distal femoral valgus angle positioning module body 31, a valgus angle positioning sleeve 32, a valgus angle dial 33 and a valgus angle pull rod 34. A positioning sliding hole 35 is respectively provided on the left and right sides of the distal femoral valgus angle positioning module body 31. The two parallel optical axes 23 are correspondingly plugged into the two positioning sliding holes 35. One of the two positioning sliding holes 35 is a circular hole, and the other is an elliptical hole, which effectively avoids the jamming caused by the cumulative error of the parallel optical axis when sliding up and down.

[0038] The distal femoral valgus angle positioning module body 31 includes an upper side plate and a lower side plate, and a lever hole 36 is provided between the upper and lower side plates and the front end. The front end of the valgus angle lever 34 is inserted into the lever hole 36 and fixedly connected to the upper side plate by a fastening screw 37. The rear end of the valgus angle lever 34 extends from the rear of the distal femoral valgus angle positioning module body 31 and is sleeved with the valgus angle positioning sleeve 32. The rear of the valgus angle positioning sleeve 32 is limited by a fixing nut screwed to the valgus angle lever 34.

[0039] The eversion angle dial 33 is arranged between the eversion angle lever 34 and the upper side plate, and a rotating shaft 38 is provided at the rear end on the center line of the upper side plate. The front end of the eversion angle dial 33 is rotatably connected to the upper side plate through the rotating shaft 38. The rear end of the eversion angle dial 33 is an arcuate edge 331, and the center of the arcuate edge 331 is the 0° scale point. The axis of the fastening screw 37, the axis of the rotating shaft 38 and the 0° scale point are located on the same vertical plane. On the arcuate edge 331, from the 0° scale point to the left are 3°, 5°, 7°, and 9° scale points on the L side, and to the right are 3°, 5°, 7°, and 9° scale points on the R side.

[0040] The arc-shaped edge 331 corresponds to the 0° scale point, the 3°, 5°, 7°, 9° scale points on the L side and the 3°, 5°, 7°, 9° scale points on the R side, respectively, with dial grooves 332, and the front end of the valgus angle positioning sleeve 32 is provided with a protruding positioning tip 321, and the protruding positioning tip 321 is plugged into the dial groove 332, and by pulling the valgus angle positioning sleeve, the adjustment of 0°, 3°, 5°, 7°, 9° on the L side and 0°, 3°, 5°, 7°, 9° on the R side can be achieved. The front side of the valgus angle positioning sleeve is designed with a protruding positioning tip, and after the valgus angle adjustment is completed, the valgus angle positioning sleeve is released, and the protruding positioning tip can be embedded in the dial groove, ensuring that the valgus angle during the operation will not change due to the vibration of the osteotomy.

[0041] The present invention combines the correction of osteotomy of the distal medial and lateral bone defects of the left and right femoral condyles and the adjustment and positioning functions of the valgus angle of the left and right legs into one, and provides a continuous valgus angle of 0-9° for selection and adjustment. It greatly facilitates the positioning of the valgus angle of the distal femoral osteotomy by doctors, and accurately corrects 5mm or 10mm of the distal medial and lateral bone defects of the femur. It improves surgical efficiency and simplifies surgical operations, making it as convenient as possible for doctors to use, while ensuring the safety of patients after surgery.

[0042] The above is a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A distal femoral condyle bone defect osteotomy locator, characterized in that: It comprises a distal femoral bone defect osteotomy module, a sliding locking positioning module and a distal femoral valgus angle positioning module, wherein the bottom front side of the distal femoral bone defect osteotomy module is provided with a mounting surface that fits the anterior femoral condyle, and the top rear side of the distal femoral bone defect osteotomy module is provided with three correction osteotomy grooves arranged in parallel front and back; The sliding locking positioning module is connected to the rear of the distal femoral bone defect osteotomy module, and includes a sliding locking positioning module body and a push-type locking hook, the middle part of the push-type locking hook is rotatably connected to the top of the sliding locking positioning module body, a spring is provided between the lower part of the rear end of the push-type locking hook and the sliding locking positioning module body, and the front end of the push-type locking hook is a curved hook that is detachably hooked with the correction osteotomy groove; The distal femoral valgus angle positioning module is arranged below the sliding locking positioning module, and comprises a distal femoral valgus angle positioning module body, a valgus angle positioning sleeve, a valgus angle dial and a valgus angle pull rod, the front end of the valgus angle pull rod is plugged and fixed with the distal femoral valgus angle positioning module body, the rear end of the valgus angle pull rod extends from the rear of the distal femoral valgus angle positioning module body and is sleeved with the valgus angle positioning sleeve, and the rear of the valgus angle positioning sleeve is limited by a fixing nut screwed with the valgus angle pull rod; The distal femoral valgus angle positioning module body comprises an upper side plate and a lower side plate, a lever hole is provided between the upper and lower side plates and the front end, the front end of the valgus angle lever is inserted into the lever hole and is fixedly connected to the upper side plate by a fastening screw, the valgus angle dial is provided between the valgus angle lever and the upper side plate, a rotating shaft is provided at the rear end on the center line of the upper side plate, and the front end of the valgus angle dial is rotatably connected to the upper side plate by the rotating shaft; The valgus angle scale is arranged above the valgus angle lever and is rotatably connected to the body of the distal femoral valgus angle positioning module, the rear end of the valgus angle scale is an arc-shaped edge, the center of the arc-shaped edge is a 0° scale point, the axis of the fastening screw, the axis of the rotating shaft and the 0° scale point are located on the same vertical plane, and the arc-shaped edge has 3°, 5°, 7° and 9° scale points on the L side to the left from the 0° scale point, and 3°, 5°, 7° and 9° scale points on the R side to the right; The arc edge corresponds to the 0° scale point, the 3°, 5°, 7°, 9° scale points on the L side and the 3°, 5°, 7°, 9° scale points on the R side are respectively provided with dial grooves, and the front end of the eversion angle positioning sleeve is provided with a raised positioning tip, and the raised positioning tip is plugged into the dial groove.

2. The distal femoral condyle bone defect osteotomy locator according to claim 1, characterized in that: The sliding locking positioning module also includes two parallel optical axes. The left and right ends of the bottom plate of the sliding locking positioning module body are respectively connected to a parallel optical axis. The left and right sides of the distal femoral valgus angle positioning module body are respectively provided with a positioning sliding hole. The two parallel optical axes are correspondingly plugged into the two positioning sliding holes.

3. The distal femoral condyle bone defect osteotomy locator according to claim 1, characterized in that: The left and right sides of the top of the distal femoral bone defect osteotomy module are both provided with oblique nail holes for fixation, and the front side of the top of the distal femoral bone defect osteotomy module is provided with adjustable position nail holes.

4. The distal femoral condyle bone defect osteotomy locator according to claim 1, characterized in that: A connecting hole is arranged on the rear end surface of the distal femoral bone defect osteotomy module, and a connecting rod is arranged on the front end surface of the sliding locking positioning module body, and the connecting rod is plugged into the connecting hole.

5. The distal femoral condyle bone defect osteotomy locator according to claim 1, characterized in that: The top of the sliding locking positioning module body is provided with two side support plates, and the connecting surface between the two side support plates is provided with a spring mounting hole. A spring plugged into the spring mounting hole is provided below the rear end of the push-type locking hook. The middle part of the push-type locking hook is supported and positioned between the two side support plates by a support shaft, and the front end of the push-type locking hook is a bent hook that is detachably hooked with the revised osteotomy groove.

6. The distal femoral condyle bone defect osteotomy locator according to claim 1, characterized in that: The revised sizes of the three revised osteotomy grooves are 0mm, 5mm and 10mm respectively.

7. The distal femoral condyle bone defect osteotomy locator according to claim 1, characterized in that: The push-type locking hook is provided with a plurality of convex edges.

8. The distal femoral condyle bone defect osteotomy locator according to claim 2, characterized in that: An anti-separation mechanism is provided at the lower end of one of the parallel optical axes.

9. The distal femoral condyle bone defect osteotomy locator according to claim 2, characterized in that: One of the two positioning sliding holes is a circular hole, and the other is an elliptical hole.

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