CN109700499B - Femur distal end osteotomy device - Google Patents
Femur distal end osteotomy device Download PDFInfo
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- CN109700499B CN109700499B CN201910099537.0A CN201910099537A CN109700499B CN 109700499 B CN109700499 B CN 109700499B CN 201910099537 A CN201910099537 A CN 201910099537A CN 109700499 B CN109700499 B CN 109700499B
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- osteotomy
- femur
- femoral
- guide plate
- connecting rod
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- 210000000689 upper leg Anatomy 0.000 title claims description 69
- 210000000988 bone and bone Anatomy 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 8
- 238000005299 abrasion Methods 0.000 claims description 3
- 210000000845 cartilage Anatomy 0.000 claims description 3
- 210000000629 knee joint Anatomy 0.000 abstract description 7
- 238000013150 knee replacement Methods 0.000 abstract description 2
- 238000001356 surgical procedure Methods 0.000 abstract 2
- 230000009916 joint effect Effects 0.000 abstract 1
- 238000011084 recovery Methods 0.000 abstract 1
- 230000007547 defect Effects 0.000 description 3
- 241000469816 Varus Species 0.000 description 1
- 210000001185 bone marrow Anatomy 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 210000003141 lower extremity Anatomy 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000007170 pathology Effects 0.000 description 1
- 238000011883 total knee arthroplasty Methods 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
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- Surgical Instruments (AREA)
- Prostheses (AREA)
Abstract
A distal femoral osteotomy device, comprising a femoral intramedullary fixation needle fixed in the femoral medullary cavity, a connecting rod installed on the femoral intramedullary fixation needle, a femoral osteotomy guide plate installed on the connecting rod, and a osteotomy thickness measuring device installed on the femoral osteotomy guide plate. The present invention is easy to adjust, ensures that the inner and outer osteotomy thicknesses are predetermined osteotomy thicknesses, and the osteotomy angle is the physiological inner and outer turning angle of the patient, achieving dynamic alignment during knee replacement surgery, facilitating rapid recovery of the patient, and improving the satisfaction of knee joint activity after replacement surgery.
Description
Technical Field
The invention relates to a femur distal osteotomy device.
Background
For patients with advanced knee joint pathology, total knee arthroplasty is a widely used and effective treatment. The alignment technique is the basis of knee replacement and refers to the method by which the surgeon performs osteotomies and installs the prosthesis in the alignment during the joint replacement procedure. The traditional alignment method is that mechanical axis alignment is performed, namely, the lower limb mechanical axis formed by femoral head center-knee joint center-ankle joint center connecting line is used for performing osteotomy and installing a prosthesis, so that the rotation axis of the knee joint prosthesis after replacement is perpendicular to the mechanical axis, for femur osteotomy, the current practice is to insert a medullary cavity rod into a medullary cavity to find the anatomic axis of femur, and the anatomic axis is used as a reference, and an osteotomy plane is determined according to 5 degrees, 6 degrees or 7 degrees (the degrees are obtained by measuring the included angle of the anatomic axis and the mechanical axis through X-ray film before operation), so that the mechanical axis alignment is realized, but according to dynamics alignment theory, the knee joint of a person naturally turns inwards, so that the femur also needs to be maintained in the varus position osteotomy according to dynamics alignment theory; to achieve this goal, it is necessary to cut the distal femur of varying thickness (because most patients experience wear on the distal femur) and to ensure that the osteotomy plane is parallel to the joint line before wear occurs, which is difficult to achieve with current techniques and tools. Attempts have been made to compensate for distal femur defects by means of patches, but this solution is not sufficiently accurate and requires high levels of experience and skill from the surgeon itself.
Disclosure of Invention
The invention solves the defects of the prior art and provides the femur distal end osteotomy device which is convenient to adjust and ensures that the thickness of the inner and outer osteotomies is the preset osteotomies, and the osteotomies angle is the physiological inversion angle of the patient.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
A femur distal osteotomy device comprises a femur intramedullary fixation needle 4 fixed in a femur intramedullary cavity, a connecting rod 3 arranged on the femur intramedullary fixation needle 4, a femur osteotomy guide plate 2 arranged on the connecting rod 3, and an osteotomy thickness measurer 1 arranged on the femur osteotomy guide plate 2;
The connecting rod 3 is L-shaped, one end of the connecting rod 3 is arranged on the femoral marrow internal fixation needle 4 through a connecting piece 31, the other end of the connecting rod is connected with the femoral osteotomy guide plate 2 through a pressurizing screw rod 21, the femoral osteotomy guide plate 2 can rotate by taking the pressurizing screw rod 21 as an axle center after being arranged on the connecting rod 3, and the femoral osteotomy guide plate 2 and the femoral marrow internal fixation needle 4 can be fixed in an angle relation by screwing the pressurizing screw rod 21;
The femur osteotomy guide plate 2 is provided with an osteotomy saw blade guide groove 23, a positioning round hole and a plurality of nail holes 22, and the two positioning round holes are symmetrically arranged on the femur osteotomy guide plate 2 by taking the center line of the long side of the osteotomy saw blade guide groove 23 as the center;
The osteotomy thickness measurer 1 comprises a slide bar 12 and a straight baffle 11 for contacting the bone surface at the far end of a femur, wherein the slide bar 12 is L-shaped, one end of the slide bar 12 is matched with the positioning round hole in size, the slide bar 12 is inserted into the positioning round hole, the slide bar 12 can rotate in the positioning round hole, a sliding piece 14 which is in sliding connection with the slide bar is sleeved on the other end of the slide bar 12, a locking screw 13 for fixing the sliding piece on the slide bar is arranged on the sliding piece 14, the straight baffle 11 is fixed on the sliding piece 14, and the straight baffle 11 is perpendicular to a femoral intramedullary fixation needle 4 after being installed on the slide bar 12.
Further, the tip of the femoral intramedullary fixation needle 4 is provided with a cross-shaped groove. Has anti-rotation and fixing effects.
Further, the connecting member 31 and the sliding member 14 are both sleeves.
Further, the pressurizing screw 21 is arranged at the position where the center line of the long side of the osteotomy saw blade guide slot 23 is located.
Furthermore, the femur osteotomy guide plate 2 is provided with a screw hole at a position along the center line of the long side of the osteotomy saw blade guide groove 23, the connecting rod 3 is correspondingly provided with a through hole, and the pressurizing screw 21 is installed in the screw hole through the through hole.
Further, the sliding rod 12 is provided with a thickness scale for displaying the up-and-down moving distance of the flat baffle 11.
Further, nuts which are convenient for hand screwing are arranged on the pressurizing screw rod 21 and the locking screw rod 13.
With the adoption of the structure, the femoral intramedullary fixation needle 4 is arranged at the distal end of the femur towards the intramedullary canal, the tail end of the femoral intramedullary fixation needle 4 is connected with the femoral osteotomy guide plate 2, the osteotomy thickness measurer 1 is arranged in the positioning round holes at two sides of the femoral osteotomy guide plate 2, and when in use, the pressurizing screw 21 is unscrewed firstly, and the femoral osteotomy guide plate 2 can slide and rotate along the connecting rod 3; the method comprises the steps of determining the thickness of the distal femur of the inner side and the outer side in advance according to the abrasion degree of cartilage and the like, inserting an osteotomy thickness measurer 1 into connecting holes on the inner side and the outer side of a femur osteotomy guide plate 2, adjusting the position of a straight baffle plate 11 on the slide rod 12 according to the thickness scale on the slide rod 12 and the predetermined thickness of the two sides, screwing a locking screw 13, locking the position of the straight baffle plate 11, moving the straight baffle plate 11 through adjusting the femur osteotomy guide plate 2, enabling the two straight baffle plates 11 to be respectively contacted with the distal femur bone surface, thereby obtaining the front-back position and the deflection angle of an osteotomy module, screwing a pressurizing screw 21, driving a fixing nail into a nail in a nail hole of the femur osteotomy guide plate 2, fixing the femur osteotomy guide plate 2 with the femur, then dismantling the osteotomy thickness measurer 1, taking out a femoral intramedullary fixing needle 4, and realizing distal femur osteotomy by a femur osteotomy saw blade guide groove 23 of the distal femur osteotomy guide plate 2, thereby guaranteeing the thickness of the inner side osteotomy guide plate to be the distal femur, and the osteotomy of a patient to be the preset osteotomy distal femur.
In summary, the invention solves the defects of the prior art, and provides the femur distal osteotomy device which has high precision, is convenient to adjust, ensures that the thickness of the inner and outer osteotomies is the predetermined osteotomies, and ensures that the osteotomies angle is the physiological inversion angle of the patient, so as to realize the dynamics alignment of the knee joint replacement operation, keep the original angle of the knee joint movement axis of the patient after the operation, facilitate the rapid rehabilitation of the patient, improve the knee joint movement satisfaction degree of the patient after the replacement operation, and improve the life quality.
Drawings
Fig. 1 is a perspective view of the present invention.
In the drawing, 1, an osteotomy thickness measurer; 2. a femur osteotomy guide plate; 11. a flat baffle; 12. a slide bar; 13. locking the screw; 14. a slider; 21. a pressurizing screw; 22. a nail hole; 23. osteotomy saw blade guide slot; 3. a connecting rod; 31. a connecting piece; 4. femoral intramedullary fixation needles.
Detailed Description
The invention will be further described in detail below with reference to the drawings and examples of implementation for a better understanding of the invention, but the embodiments of the invention are not limited thereto, and the scope of protection of the invention also relates to equivalent technical means that can be conceived by a person skilled in the art based on the inventive concept.
As shown in fig. 1, a distal femur osteotomy device comprises a femoral intramedullary fixation needle 4 fixed in a femoral medullary cavity, a connecting rod 3 mounted on the femoral intramedullary fixation needle 4, a femoral osteotomy guide plate 2 mounted on the connecting rod 3, and an osteotomy thickness measurer 1 mounted on the femoral osteotomy guide plate 2; the tip of the femoral intramedullary fixation needle 4 is provided with a cross-shaped groove which is convenient to fix in femoral marrow.
The femur osteotomy guide plate 2 is provided with an osteotomy saw blade guide groove 23, a positioning round hole and a plurality of nail holes 22, and the two positioning round holes are symmetrically arranged on the femur osteotomy guide plate 2 by taking the center line of the long side of the osteotomy saw blade guide groove 23 as the center; screw holes are formed in the positions of the femur osteotomy guide plates 2 along the center lines of the long sides of the osteotomy saw blade guide grooves 23, through holes are correspondingly formed in the connecting rods 3, and the pressurizing screw rods 21 are installed in the screw holes through the through holes;
The connecting rod 3 is L-shaped, one end of the connecting rod 3 is sleeved on the femoral intramedullary fixation needle 4 through a connecting piece 31, the other end of the connecting rod is connected with the femoral osteotomy guide plate 2 through a pressurizing screw 21, the connecting piece 31 is provided with a screw rod which facilitates the connecting piece 31 to lock on the femoral intramedullary fixation needle 4, and the femoral osteotomy guide plate 2 is parallel to the femoral intramedullary fixation needle 4 after being arranged on the connecting rod 3;
The osteotomy thickness measurer 1 comprises a slide bar 12 and a straight baffle 11 used for contacting the bone surface at the far end of femur, wherein the slide bar 12 is L-shaped, one end of the slide bar 12 is matched with the positioning round hole in size, the slide bar 12 is inserted into the positioning round hole, the slide bar 12 can rotate in the positioning round hole, a sliding piece 14 which is in sliding connection with the slide bar is sleeved on the other end of the slide bar 12, a locking screw 13 used for fixing the sliding piece on the slide bar is arranged on the sliding piece 14, the straight baffle 11 is fixed on the sliding piece 14, the straight baffle 11 is perpendicular to a femoral marrow internal fixation needle 4 after being installed on the slide bar 12, and one end of the slide bar 12, provided with thickness scales used for displaying the vertical movement distance of the straight baffle 11, is arranged at one end of the installation straight baffle 11.
In this example, nuts which are convenient for hand screwing are arranged on the pressurizing screw 21 and the locking screw 13.
Before operation, a femoral intramedullary fixation needle 4 is beaten towards a intramedullary canal at the distal end of a femur, the tail end of the femoral intramedullary fixation needle 4 is connected with a femoral osteotomy guide plate 2, osteotomy thickness measuring devices 1 are arranged in positioning round holes at two sides of the femoral osteotomy guide plate 2, and when the femoral osteotomy guide plate is used, a pressurizing screw 21 is unscrewed firstly, and the femoral osteotomy guide plate 2 can slide and rotate along a connecting rod 3; the method comprises the steps of determining the thickness of the distal femur cut at the inner side and the outer side in advance according to the abrasion degree of cartilage and the like, inserting a cut thickness measurer 1 into connecting holes at the inner side and the outer side of a femur cut guide plate 2, adjusting the position of a straight baffle plate 11 on the slide rod 12 according to the predetermined cut thickness at the two sides through thickness scales on the slide rod 12, screwing a locking screw 13, locking the position of the straight baffle plate 11 on the slide rod 12, then moving the straight baffle plate 11 through adjusting the femur cut guide plate 2 so that the two straight baffle plates 11 respectively contact the distal femur bone surface, thereby obtaining the front-back position and the deflection angle of the cut module, screwing a pressurizing screw 21, driving a fixed nail into a nail hole of the femur cut guide plate 2, fixing the femur cut guide plate 2 with femur, then dismantling the cut thickness measurer 1, taking out a bone marrow internal fixing needle 4, and realizing the distal femur cut thickness at the distal femur cut saw blade guide groove 23 at the distal femur cut guide plate 2, thereby guaranteeing the distal femur cut thickness at the inner side and the distal femur cut thickness to be the preset bone cut thickness of a patient physiological internal turnover angle.
In addition, it should be noted that, the present invention is not limited to the above embodiments, and as long as the parts thereof are not described in specific dimensions or shapes, the parts may be any dimensions or shapes suitable for the structures thereof, and any changes in the material composition thereof, and all the structural designs provided by the present invention are all modifications of the present invention, which should be considered to be within the scope of the present invention.
Claims (4)
1. A distal femoral osteotomy device, comprising: comprises a femoral intramedullary fixation needle (4) fixed in a femoral intramedullary cavity, a connecting rod (3) arranged on the femoral intramedullary fixation needle (4), a femoral osteotomy guide plate (2) arranged on the connecting rod (3) and an osteotomy thickness measurer (1) arranged on the femoral osteotomy guide plate (2);
the connecting rod (3) is L-shaped, one end of the connecting rod (3) is arranged on the femoral marrow internal fixation needle (4) through a connecting piece (31), the other end of the connecting rod is connected with the femoral osteotomy guide plate (2) through a pressurizing screw rod (21), and the femoral osteotomy guide plate (2) is parallel to the femoral marrow internal fixation needle (4) after being arranged on the connecting rod (3) and can rotate by taking the connecting rod (3) as an axle center;
The femur osteotomy guide plate (2) is provided with an osteotomy saw blade guide groove (23), a positioning round hole and a plurality of nail holes (22), the two positioning round holes are symmetrically arranged on the femur osteotomy guide plate (2) by taking the long-side central line of the osteotomy saw blade guide groove (23) as a center, the pressurizing screw (21) is arranged at the position of the long-side central line of the osteotomy saw blade guide groove (23), the femur osteotomy guide plate (2) is provided with a screw hole at the position of the long-side central line of the osteotomy saw blade guide groove (23), the connecting rod (3) is correspondingly provided with a through hole, and the pressurizing screw (21) is arranged in the screw hole by the through hole;
The osteotomy thickness measurer (1) comprises a sliding rod (12) and a straight baffle (11) for contacting a bone surface at the far end of a femur, wherein the sliding rod (12) is L-shaped, one end of the sliding rod (12) is matched with the positioning round hole in size, the sliding rod (12) is inserted into the positioning round hole, the sliding rod (12) can rotate in the positioning round hole, a sliding piece (14) in sliding connection with the sliding rod is sleeved on the other end of the sliding rod (12), a locking screw (13) for fixing the sliding piece on the sliding rod is arranged on the sliding piece (14), the straight baffle (11) is fixed on the sliding piece (14), the straight baffle (11) is arranged on the sliding rod (12) and then is perpendicular to a femoral marrow internal fixing needle (4), and a thickness scale for displaying the vertical movement distance of the straight baffle (11) is arranged on the sliding rod (12).
When in use, the pressurizing screw rod (21) is unscrewed, and the femur osteotomy guide plate (2) can slide and rotate along the connecting rod (3); the method comprises the steps of determining the thickness of the femur distal end on the inner side and the outer side according to the abrasion degree of cartilage and the like in advance, inserting an osteotomy thickness measurer (1) into connecting holes on the inner side and the outer side of a femur osteotomy guide plate (2), driving a fixing nail into a nail hole (22) of the femur osteotomy guide plate (2), fixing the femur osteotomy guide plate (2) and the femur measurer according to the thickness scales on the slide bars (12), then screwing down a locking screw (13), locking the position of the straight baffle (11) on the slide bars (12), then moving the straight baffle (11) through adjusting the femur osteotomy guide plate (2) so that the two straight baffles (11) respectively contact the femur distal end bone surface, thereby obtaining the front-back position and the deflection angle of an osteotomy module, screwing down a pressing screw (21), disassembling the osteotomy thickness measurer (1) and taking out a femur bone internal fixing needle (4), and realizing femur distal end osteotomy through an osteotomy saw blade guide groove (23) on the distal end of the femur osteotomy guide plate (2).
2. The distal femoral osteotomy device of claim 1, wherein: the tip of the femur intramedullary fixation needle (4) is provided with a cross-shaped groove.
3. The distal femoral osteotomy device of claim 1, wherein: the connecting piece (31) and the sliding piece (14) are both sleeves.
4. The distal femoral osteotomy device of claim 1, wherein: nuts convenient for hand screwing are arranged on the pressurizing screw rod (21) and the locking screw rod (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910099537.0A CN109700499B (en) | 2019-01-31 | 2019-01-31 | Femur distal end osteotomy device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910099537.0A CN109700499B (en) | 2019-01-31 | 2019-01-31 | Femur distal end osteotomy device |
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| Publication Number | Publication Date |
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| CN109700499A CN109700499A (en) | 2019-05-03 |
| CN109700499B true CN109700499B (en) | 2024-09-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910099537.0A Active CN109700499B (en) | 2019-01-31 | 2019-01-31 | Femur distal end osteotomy device |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111714184B (en) * | 2020-06-29 | 2021-09-07 | 中国人民解放军总医院 | A double-guide plate system for osteotomy for high tibial osteotomy |
| CN112022277B (en) * | 2020-09-23 | 2024-06-25 | 经纬医疗器材制造（深圳）有限公司 | Femur positioning device capable of adjusting osteotomy quantity |
| CN112826568B (en) * | 2021-01-04 | 2022-01-28 | 南昌大学第二附属医院 | Femoral extramedullary positioning osteotomy device in knee joint replacement and using method thereof |
| CN113057712B (en) * | 2021-02-25 | 2022-03-11 | 北京市春立正达医疗器械股份有限公司 | Tibia osteotomy guider |
| CN113729839B (en) * | 2021-09-13 | 2023-04-07 | 张洪美 | Distal femur extramedullary positioning bone cutter in knee joint replacement operation |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWM310697U (en) * | 2006-09-01 | 2007-05-01 | United Orthopedic Corp | Surgical appliances with manual total knee arthroplasty |
| CN209808458U (en) * | 2019-01-31 | 2019-12-20 | 中南大学湘雅医院 | Distal femur osteotomy device |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5108396A (en) * | 1990-06-07 | 1992-04-28 | Smith & Nephew Richards Inc. | Intramedullary referenced humeral head resection guide |
| US5540696A (en) * | 1995-01-06 | 1996-07-30 | Zimmer, Inc. | Instrumentation for use in orthopaedic surgery |
| CN205433825U (en) * | 2015-12-30 | 2016-08-10 | 孙朝军 | Outside fix of thighbone marrow cuts bone template |
| CN107049415B (en) * | 2017-01-14 | 2023-10-03 | 中山大学附属第一医院 | Femur distal osteotomy positioning guide device and positioning method thereof |
| KR101898264B1 (en) * | 2017-01-25 | 2018-09-12 | 서재곤 | Femoral block with double deck |
-
2019
- 2019-01-31 CN CN201910099537.0A patent/CN109700499B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWM310697U (en) * | 2006-09-01 | 2007-05-01 | United Orthopedic Corp | Surgical appliances with manual total knee arthroplasty |
| CN209808458U (en) * | 2019-01-31 | 2019-12-20 | 中南大学湘雅医院 | Distal femur osteotomy device |
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| Publication number | Publication date |
|---|---|
| CN109700499A (en) | 2019-05-03 |
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