CN109745156B - Gap balance method knee joint replacement thighbone size measuring die - Google Patents
Gap balance method knee joint replacement thighbone size measuring die Download PDFInfo
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- CN109745156B CN109745156B CN201910069022.6A CN201910069022A CN109745156B CN 109745156 B CN109745156 B CN 109745156B CN 201910069022 A CN201910069022 A CN 201910069022A CN 109745156 B CN109745156 B CN 109745156B
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Abstract
The invention discloses a size measuring die for knee joint replacement thighbone by a gap balancing method, wherein a sliding sleeve and a small column positioning block can slide on a main body, the back side of the sliding sleeve is connected with an upper foot plate in a pendulum type suspension manner, the upper foot plate and the lower foot plate are inserted into a gap formed by cutting the proximal end of a tibia and the distal end of the thighbone and are expanded when the knee position is extended, the size of a prosthesis gasket can be measured by a small window of a sliding sleeve cover, and meanwhile, the sliding sleeve pushes against the upper small column positioning block to slide upwards and locks the relationship between the lower foot plate and the small column positioning block through a hook. When the knee is bent, the sliding sleeve falls down to close the upper and lower foot plates, the upper and lower foot plates are inserted into the gap between the proximal end of the tibia and the posterior condyles of the femur, the upper and lower foot plates are expanded again, the tension of the inner and outer collateral ligaments is expanded before the knee is bent and the osteotomy, holes are drilled according to the positioning holes at the two ends of the small column positioning block, the holes can be used as positioning holes for placing the four-in-one osteotomy module, and at the moment, the size and the model of the femoral prosthesis can be measured through the pointer column scale marks inserted above.
Description
Technical Field
The invention relates to the field of medical instruments, in particular to a size measuring die for knee joint replacement thighbone by a gap balance method.
Background
Almost all size measuring modules of knee joint replacement thighbones at home and abroad are manufactured according to the equivalent osteotomy theory, the lower foot plate of the size measuring module supports the rear condyle of the thighbone, the proper prosthesis size is measured through the matching of pointers, and the four-in-one osteotomy module is arranged according to the rear condyle reference and the empirical external rotation of 3 degrees.
The existing size measuring module can achieve the required accuracy for measuring the proper size of the prosthesis, but the four-in-one osteotomy module positioning hole is manufactured by the mould, so that the proper knee extension and flexion gap can be obtained, the proper internal and external rotation of the prosthesis can not be accurately carried out, and particularly, abundant operation experience of an operator is often required for the affected knee with varus deformity, knee flexion deformity and posterior condylar dysplasia. Therefore, a gap balance method knee joint replacement femur size measuring mold is provided, and the four-in-one osteotomy module is accurately placed.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, provides a gap balance method knee joint replacement femur size measuring mold, and can effectively solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: a size measuring die for knee joint replacement thighbone by a gap balancing method comprises a main body, wherein a lower foot plate is fixedly connected to the outer surface of the lower end of the main body, a main body cover is arranged on the outer surface of the front end of the main body, a toothed groove is formed in the outer surface of the front end of the main body, a sliding sleeve is arranged on the outer surface of the main body, an upper foot plate is fixedly connected to the outer surface of the rear end of the sliding sleeve, a check ring is arranged between the upper foot plate and the sliding sleeve, a sliding sleeve cover and a screw are arranged on the outer surface of the other side of the sliding sleeve, a small column positioning block is arranged above the sliding sleeve, a hook is arranged on one side of the small column positioning block, a second cylindrical pin is arranged in the middle of the hook, a bayonet lock is arranged at one end of the hook, a first spring is arranged on one side of, the inner surface of the upper end of the upright column is provided with a second spring, the upper end of the second spring is provided with a steel ball, the outer surface of one side of the upper end of the upright column is provided with a handle, the outer surface of the other side of the upper end of the upright column is provided with a pointer, and the outer surface of the lower end of the middle part of the pointer is provided with a first cylindrical pin.
1. As a preferred technical scheme of the invention, the main body is fixedly connected with the lower foot plate, the inner surface of the sliding sleeve is in sliding connection with the outer surface of the main body, and interval scale marks are arranged between the sliding sleeve and the main body.
2. As a preferable technical scheme of the invention, the outer surface of one side of the sliding sleeve is movably connected with the outer surface of one side of the upper foot plate through the retainer ring, and the upper foot plate is connected with the back side of the sliding sleeve in a pendulum type suspension mode.
3. As a preferred technical scheme of the invention, the upright column and the pointer are connected with the steel ball in a relatively sliding manner through the spring, the middle part of the small column positioning block is provided with a column hole, the inner surface of the small column positioning block is connected with the outer surface of the main body in a sliding manner through the column hole, two sides of the column hole are provided with columnar barrel ways, and the upright column can be inserted into the two columnar barrel ways above the small column positioning block to slide up and down.
4. According to a preferable technical scheme of the invention, the outer surface of the upright post is provided with large and small scale lines, two sides of the lower end of the small post positioning block are provided with two groups of nail holes, and the small post positioning block can be used as a four-in-one osteotomy mold small post positioning device.
5. As a preferred technical scheme of the invention, a small window is arranged on the outer surface of one side of the sliding sleeve.
Compared with the prior art, the invention has the beneficial effects that:
the invention can expand the tension of inner and outer ligaments when stretching and bending the knee, determines the required knee bending gap through the cut tibial platform and the knee stretching gap at the far end of the femur, determines the positioning hole of the four-in-one osteotomy module, and measures the size of the prosthesis through the distance from the positioning hole to the anterior condyle of the femur. The method specifically comprises the following steps: in the knee joint replacement operation, the distal end of the femur and the tibial plateau are firstly cut to obtain a rectangular gap at the straightening position, and the upper foot plate and the lower foot plate of the invention are utilized to measure the numerical value of the straightening gap by opening so as to determine the thickness of the gasket. The sliding sleeve pushes against the upper small column positioning block to slide upwards and locks the relation between the lower foot plate and the small column positioning block through the hook, the bayonet lock and the spring. When the knee bending position positioning four-in-one osteotomy module positioning hole is formed, the sliding sleeve falls down to close the upper foot plate and the lower foot plate, the upper foot plate and the lower foot plate are inserted into a gap between the proximal end of the tibia and the femoral posterior condyles, the upper foot plate and the lower foot plate are expanded again, and the upper foot plate and the lower foot plate play a role in expanding the medial and lateral collateral ligaments of the knee joint under equal tension.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a side schematic view of the present invention;
FIG. 3 is a partial cutaway view of FIG. 2 in accordance with the present invention;
FIG. 4 is a schematic structural view of the sliding sleeve 14 of FIG. 2 according to the present invention;
FIG. 5 is a partial schematic view of the present invention;
FIG. 6 is a schematic structural diagram of the main body 1 in FIG. 2 according to the present invention;
in the figure: 1. a main body; 2. hooking; 3. a main body cover; 4. a sliding sleeve cover; 5. an upper foot plate; 6. a lower foot plate; 7. a screw; 8. a pointer; 9. a first cylindrical pin; 10. a handle; 11. a second cylindrical pin; 12. a bayonet lock; 13. a first spring; 14. a sliding sleeve; 15. a retainer ring; 16. a second spring; 17. steel balls; 18. a column; 19. a small column positioning block; 20. a tooth-shaped groove.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-6, the present invention provides a technical solution: a size measuring die for knee joint replacement thighbone by a gap balancing method comprises a main body 1, a lower foot plate 6 is fixedly connected to the outer surface of the lower end of the main body 1, a main body cover 3 is arranged on the outer surface of the front end of the lower foot plate 6, a toothed groove 20 is formed in the outer surface of the front end of the main body 1, a sliding sleeve 14 is arranged on the outer surface of the main body 1, an upper foot plate 5 is fixedly connected to the outer surface of the rear end of the sliding sleeve 14, a check ring 15 is arranged between the upper foot plate 5 and the sliding sleeve 14, a sliding sleeve cover 4 and a screw 7 are arranged on the outer surface of the other side of the sliding sleeve 14, the screw 7 is located below the sliding sleeve cover 4, a small column positioning block 19 is arranged above the sliding sleeve 14, a hook 2 is arranged on one side of the small column positioning block 19, a second cylindrical pin 11 is arranged in the middle of the hook 2, a bayonet 12 is arranged at, a second spring 16 is arranged on the inner surface of the upper end of the upright column 18, a steel ball 17 is arranged at the upper end of the second spring 16, a handle 10 is arranged on the outer surface of one side of the upper end of the upright column 18, a pointer 8 is arranged on the outer surface of the other side of the upper end of the upright column 18, and a first cylindrical pin 9 is arranged on the outer surface of the lower end of the middle of the pointer 8.
The main body 1 and the sliding sleeve 14 can be convenient to slide, in the embodiment, preferably, the main body 1 is fixedly connected with the lower foot plate 6, the inner surface of the sliding sleeve 14 is slidably connected with the outer surface of the main body 1, and space scale marks are arranged between the sliding sleeve 14 and the main body 1.
The upper foot plate 5 and the sliding sleeve 14 can be conveniently slid, in this embodiment, preferably, an outer surface of one side of the sliding sleeve 14 is movably connected with an outer surface of one side of the upper foot plate 5 through a retaining ring 15, and the back sides of the upper foot plate 5 and the sliding sleeve 14 are connected in a pendulum suspension manner.
In the embodiment, preferably, the upright column 18 and the pointer 8 can be connected with the steel ball 17 in a relatively sliding mode through the spring 16, the middle of the small column positioning block 9 is provided with a column hole, the inner surface of the small column positioning block 9 is connected with the outer surface of the main body 1 in a sliding mode through the column hole, the two sides of the column hole are provided with columnar barrel ways, and the upright column 18 can be inserted into the two columnar barrel ways above the small column positioning block 9 to slide up and down.
In the embodiment, preferably, the outer surface of the upright post 18 is provided with scale lines, two sides of the lower end of the small post positioning block 9 are provided with two groups of nail holes, and the positioning device can be used as a small post positioning device of a four-in-one osteotomy mold.
Can be convenient for read upper foot board 5 and lower foot board 6 interval device, in this embodiment, preferably, sliding sleeve 14's one side surface has seted up the fenestrate.
The working principle and the using process of the invention are as follows: when the knee joint replacement femoral distal end and tibial plateau osteotomy is completed, a sliding sleeve 14 and a small column positioning block 19 are sequentially arranged on a main body 1, the sliding sleeve 14 is arranged on the outer surface of the main body 1 in a sliding way through a middle hole, the small column positioning block 19 is arranged above the sliding sleeve 14 in a sliding way, a locking structure is formed by the association of a tooth-shaped groove 20, a hook 2, a locking pin 12 and a first spring 13 on the main body 1, the position relation between the main body 1 and the small column positioning block 19 is controlled, an upper foot plate 5, a lower foot plate 6 and the small column positioning block 19 are inserted into a straightening gap in a closed state, a stretching clamp is arranged between a main body cover 3 and a sliding sleeve cover 4 to be stretched to an inner and outer ligament tension state, and the model of a prosthesis gasket can be read; the positions of the small column positioning block 19 and the lower foot plate 6 are kept unchanged due to the hook 2 and the column tooth-shaped locking device of the lower foot plate 6, and the upper foot plate 5 and the lower foot plate 6 return to a closed state; when the knee is bent by about 90 degrees, the upper foot plate 5 and the lower foot plate 6 are inserted between the tibial plateau and the femoral posterior condyles in a closed state, the joint state of the lower foot plate 6 and the tibial plateau and the joint state of the back side of the columella positioning block 19 and the distal end of the femur are kept, and the upper foot plate 5 and the lower foot plate 6 are expanded; at the moment, the ligaments at the inner side and the outer side of the knee are automatically in a tense state, and two four-in-one osteotomy module positioning nails are nailed into positioning holes at two sides of the lower end of the small column positioning block 19; completing the positioning of the four-in-one osteotomy module; the size of the femoral prosthesis is read through the scale mark of the upright post 18 of the pointer 8, and the size measuring task is completed, the numerical value of the straightening clearance is measured through the opening of the upper foot plate 5 and the lower foot plate 6, the sliding sleeve 14 pushes against the upper small column positioning block 19 to slide upwards and locks the relation between the lower foot plate 6 and the small column positioning block 19 through the hook 2, the bayonet 12 and the first spring 13, when the four-in-one osteotomy module positioning hole is positioned at the knee bending position, the sliding sleeve 14 falls down to close the upper and lower foot plates, the clearance is inserted, the upper and lower foot plates are opened again, the upper and lower foot plates play a role in opening the inner and outer collateral ligaments of the knee joint, and the position for placing the four-in-one osteotomy module is more.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (3)
1. The utility model provides a size mould is surveyed to clearance balance method knee joint replacement thighbone, includes main part (1), its characterized in that: the outer surface of the lower end of the main body (1) is fixedly connected with a lower foot plate (6), the outer surface of the front end of the lower foot plate (6) is provided with a main body cover (3), the outer surface of the front end of the main body (1) is provided with a toothed groove (20), the outer surface of the main body (1) is provided with a sliding sleeve (14), the outer surface of the rear end of the sliding sleeve (14) is fixedly connected with an upper foot plate (5), a check ring (15) is arranged between the upper foot plate (5) and the sliding sleeve (14), the outer surface of the other side of the sliding sleeve (14) is provided with a sliding sleeve cover (4) and a screw (7), the screw (7) is positioned below the sliding sleeve cover (4), a small column positioning block (19) is arranged above the sliding sleeve (14), one side of the small column positioning block (19) is provided with a hook (2), the middle part of the hook (2) is provided with a, a first spring (13) is arranged on one side of the bayonet lock (12), an upright column (18) is arranged inside the small column positioning block (19), a second spring (16) is arranged on the inner surface of the upper end of the upright column (18), a steel ball (17) is arranged at the upper end of the second spring (16), a handle (10) is arranged on the outer surface of one side of the upper end of the upright column (18), a pointer (8) is arranged on the outer surface of the other side of the upper end of the upright column (18), and a first cylindrical pin (9) is arranged on the outer surface of the lower end of the middle part of the pointer;
the main body (1) is fixedly connected with the lower foot plate (6), the inner surface of the sliding sleeve (14) is in sliding connection with the outer surface of the main body (1), and interval scale marks are arranged between the sliding sleeve (14) and the main body (1);
the outer surface of one side of the sliding sleeve (14) is movably connected with the outer surface of one side of the upper foot plate (5) through a retainer ring (15), and the upper foot plate (5) is connected with the back side of the sliding sleeve (14) in a pendulum type suspension manner;
but realize relative sliding nature connection through No. two spring (16) and steel ball (17) between stand (18) and pointer (8), the middle part of columella locating piece (19) is provided with the post hole, the internal surface of columella locating piece (19) passes through the surface sliding connection of post hole and main part (1), and the column barrel way has been seted up to the both sides in post hole, stand (18) can insert columella locating piece (19) top two column barrel ways and slide from top to bottom.
2. The gap balancing knee replacement femur sizing die according to claim 1, wherein: the outer surface of the upright post (18) is provided with scale marks, two sides of the lower end of the small post positioning block (19) are provided with two groups of nail holes, and the small post positioning block can be used as a four-in-one osteotomy mold small post positioning device.
3. The gap balancing knee replacement femur sizing die according to claim 1, wherein: a small window is arranged on the outer surface of one side of the sliding sleeve (14).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910069022.6A CN109745156B (en) | 2019-01-24 | 2019-01-24 | Gap balance method knee joint replacement thighbone size measuring die |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910069022.6A CN109745156B (en) | 2019-01-24 | 2019-01-24 | Gap balance method knee joint replacement thighbone size measuring die |
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| Publication Number | Publication Date |
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| CN109745156A CN109745156A (en) | 2019-05-14 |
| CN109745156B true CN109745156B (en) | 2020-10-13 |
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| CN201910069022.6A Active CN109745156B (en) | 2019-01-24 | 2019-01-24 | Gap balance method knee joint replacement thighbone size measuring die |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111643195A (en) * | 2020-05-19 | 2020-09-11 | 北京市春立正达医疗器械股份有限公司 | Knee joint tissue balancer |
| CN111568611B (en) * | 2020-05-27 | 2023-11-28 | 北京市春立正达医疗器械股份有限公司 | Gap measuring pad, knee joint pressure detection device and use method |
| CN112545722B (en) * | 2020-12-01 | 2023-04-25 | 雷鹏飞 | Knee joint replacement balancer combining osteotomy and gap balance measurement technology |
| CN115462866B (en) * | 2022-11-02 | 2023-03-24 | 北京壹点灵动科技有限公司 | Knee joint parameter-based adjustment method and device, processor and electronic equipment |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5540696A (en) * | 1995-01-06 | 1996-07-30 | Zimmer, Inc. | Instrumentation for use in orthopaedic surgery |
| CN201299556Y (en) * | 2008-12-03 | 2009-09-02 | 徐辉 | A medial-lateral balance tension measuring device for knee joint |
| CN103519818A (en) * | 2013-10-22 | 2014-01-22 | 山东大学齐鲁医院 | Knee-joint gap balance tester |
| EP3220837B1 (en) * | 2014-11-19 | 2021-05-05 | Zimmer, Inc. | Gap referencing femoral sizer |
| CN105769119B (en) * | 2015-07-06 | 2019-03-26 | 微创骨科医疗科技（苏州）有限公司 | Knee joint soft tissue balance measuring device and its measurement method |
| CN108451582A (en) * | 2018-03-12 | 2018-08-28 | 长沙市第三医院 | A kind of auxiliary knee prosthesis gap poising tool |
| CN208125001U (en) * | 2018-04-03 | 2018-11-20 | 付庆鹏 | A kind of rear reference artificial knee joint replacement femur survey size mold of improvement |
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Address after: 137400 Department of bone joint movement medicine, Xingan League people's Hospital, 66 West Han street, Ulanhot, Xing'an League, Inner Mongolia Autonomous Region Applicant after: Fu Qingpeng Address before: 137400 Department of Osteoarticular Sports Medicine, Xing'an League People's Hospital, 66 Hanshan Street, Hohhot City, Inner Mongolia Autonomous Region Applicant before: Fu Qingpeng |
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