CN110801264A - Intercondylar osteotomy module - Google Patents

Intercondylar osteotomy module Download PDF

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Publication number
CN110801264A
CN110801264A CN201911114330.2A CN201911114330A CN110801264A CN 110801264 A CN110801264 A CN 110801264A CN 201911114330 A CN201911114330 A CN 201911114330A CN 110801264 A CN110801264 A CN 110801264A
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CN
China
Prior art keywords
module
osteotomy
intercondylar
positioning
notch portion
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Pending
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CN201911114330.2A
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Chinese (zh)
Inventor
解凤宝
吕昌禹
史春宝
王帅
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Beijing Chunlizhengda Medical Instruments Co Ltd
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Beijing Chunlizhengda Medical Instruments Co Ltd
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Priority to CN201911114330.2A priority Critical patent/CN110801264A/en
Publication of CN110801264A publication Critical patent/CN110801264A/en
Pending legal-status Critical Current

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    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/16Bone cutting, breaking or removal means other than saws, e.g. Osteoclasts; Drills or chisels for bones; Trepans
    • A61B17/1657Bone breaking devices
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/16Bone cutting, breaking or removal means other than saws, e.g. Osteoclasts; Drills or chisels for bones; Trepans
    • A61B17/1662Bone cutting, breaking or removal means other than saws, e.g. Osteoclasts; Drills or chisels for bones; Trepans for particular parts of the body
    • A61B17/1675Bone cutting, breaking or removal means other than saws, e.g. Osteoclasts; Drills or chisels for bones; Trepans for particular parts of the body for the knee
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/16Bone cutting, breaking or removal means other than saws, e.g. Osteoclasts; Drills or chisels for bones; Trepans
    • A61B17/17Guides or aligning means for drills, mills, pins or wires
    • A61B17/1732Guides or aligning means for drills, mills, pins or wires for bone breaking devices
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/16Bone cutting, breaking or removal means other than saws, e.g. Osteoclasts; Drills or chisels for bones; Trepans
    • A61B17/17Guides or aligning means for drills, mills, pins or wires
    • A61B17/1739Guides or aligning means for drills, mills, pins or wires specially adapted for particular parts of the body
    • A61B17/1742Guides or aligning means for drills, mills, pins or wires specially adapted for particular parts of the body for the hip
    • A61B17/175Guides or aligning means for drills, mills, pins or wires specially adapted for particular parts of the body for the hip for preparing the femur for hip prosthesis insertion

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  • Health & Medical Sciences (AREA)
  • Surgery (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Orthopedic Medicine & Surgery (AREA)
  • Biomedical Technology (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Engineering & Computer Science (AREA)
  • Dentistry (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Medical Informatics (AREA)
  • Molecular Biology (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Prostheses (AREA)

Abstract

The invention belongs to the field of medical appliances, and discloses an intercondylar osteotomy module, which comprises: the bone cutting module comprises a bone cutting module and a positioning module, wherein a notch part is formed at the bottom of the bone cutting module, the positioning module is detachably fixed in the notch part, so that when the positioning module is fixed in the notch part, the shape formed by the bone cutting module and the positioning module is consistent with the shape of a preset femoral condyle prosthesis, and when the positioning module is removed from the notch part, the notch part serves as a bone cutting opening. The intercondylar osteotomy module can improve the accuracy of the intercondylar osteotomy position and the osteotomy amount so as to avoid the need of repeatedly carrying out osteotomy correction when a femoral condylar prosthesis is subsequently installed due to inaccurate osteotomy position or osteotomy amount.

Description

Intercondylar osteotomy module
Technical Field
The invention belongs to the field of medical instruments, and particularly relates to an intercondylar osteotomy module.
Background
The knee joint intercondylar osteotomy module is an instrument for performing osteotomy on the femoral intercondylar part in the knee joint replacement operation, and is used for the surface type knee joint replacement operation. In the surface type knee joint replacement operation, firstly, the human body femoral condyle needs to be firstly cut, the existing intercondylar osteotomy module 100 ' shown in figure 1 is installed at the resected human body femoral condyle, the intercondylar osteotomy module 100 ' can carry out secondary osteotomy on the intercondylar part, namely, secondary osteotomy is carried out at the opening 1 ' of the intercondylar osteotomy module 100 ', then the intercondylar osteotomy module 100 ' is taken out, a femoral condyle test model (the shape is completely consistent with that of the femoral condyle prosthesis) is installed on the human body femoral condyle, the femoral condyle test model is used as a model of the femoral condyle prosthesis to be pre-matched with the tibial plateau pad prosthesis so as to check whether the knee joint extension gap and the flexion gap of a patient after the subsequent installation of the femoral condyle prosthesis and the tibial plateau pad prosthesis meet the requirements or not in advance, if the requirements are not met, the femoral condyle test model needs to be taken out and then the human body, the femoral condyle prosthesis may not be installed until the femoral condyle trial is able to fully fit the plateau pad prosthesis and ensure the functional use of the knee joint.
Although the existing intercondylar osteotomy module 100 ' can determine the osteotomy position and the osteotomy amount between condyles in the surface type knee joint operation and ensure the placement of the femoral condyle prosthesis to realize the function of the knee joint, in view of the above-mentioned use process, when the intercondylar osteotomy module 100 ' is applied for secondary osteotomy, the accuracy of the osteotomy position and the osteotomy amount cannot be effectively ensured, so that the effective installation of the intercondylar cannot be ensured when the femoral condyle trial model is subsequently installed, the intercondylar osteotomy module 100 ' needs to be applied again for osteotomy after the femoral condyle trial model is taken down to ensure the function of the knee joint realized when the femoral condyle trial model and the platform pad prosthesis are fitted, thereby further ensuring the function of the knee joint realized when the femoral prosthesis and the platform pad prosthesis are fitted after the femoral prosthesis are subsequently installed.
In view of the defects in the prior art, those skilled in the art want to provide an intercondylar osteotomy module capable of improving the accuracy of the intercondylar osteotomy position and the osteotomy amount so as to avoid the need of repeatedly performing osteotomy correction when the femoral condyle prosthesis is subsequently installed due to inaccurate osteotomy position or osteotomy amount.
Disclosure of Invention
In order to solve all or part of the above problems, the present invention provides an intercondylar osteotomy module including an osteotomy module and a positioning module, the bottom of the osteotomy module being formed with a notch portion, the positioning module being detachably secured in the notch portion such that when the positioning module is secured in the notch portion, the shape formed by the osteotomy module and the positioning module together is identical to the shape of a predetermined femoral condyle prosthesis, and when the positioning module is removed from the notch portion, the notch portion serves as a osteotomy opening.
Further, a press-fit protrusion is formed on one of an inner wall of the notch portion and an outer edge of the positioning module opposite to the inner wall of the notch portion, and a press-fit groove to be fitted with the press-fit protrusion is formed on the other.
Further, press-fit grooves are formed on the inner wall of the notch portion, and press-fit projections are formed on the outer edge of the positioning module opposite to the inner wall of the notch portion.
Further, cut the bone module and be formed with at least one constant head tank with breach portion intercommunication on the lateral surface that is close to breach portion, be formed with on the relative outward flange of the inner wall with breach portion of orientation module with the location arch of constant head tank complex, wherein, the degree of depth of constant head tank is constructed so that when the diapire of the protruding butt constant head tank of location, press the protruding pressure of joining in marriage of pressing the dress in the groove of pressing.
Furthermore, the locating slot symmetry formula sets up the both sides at breach portion.
Furthermore, a through hole for penetrating through a connecting column of the platform pad prosthesis is formed on the positioning module, and the through hole is not communicated with the notch part.
Furthermore, a transverse strip-shaped osteotomy groove is formed above the notch part.
Further, at least one fixing hole for fixing the osteotomy module on a human bone is formed on the osteotomy module.
Preferably, the fixation holes are distributed on both sides of the osteotomy module.
Further, mounting holes are also formed on both sides of the cutout portion of the osteotomy module.
Further, the osteotomy module further comprises a removal slot disposed on the osteotomy module.
Preferably, the removal grooves are provided on both sides of the outer side surface of the osteotomy module that engages the plateau pad.
Compared with the prior art, the intercondylar osteotomy module of the embodiment has a simple structure, is convenient to operate, integrates functions to be realized by the intercondylar osteotomy module and the femoral condyle test model, reduces steps of disassembling the intercondylar osteotomy module and installing the femoral condyle test model in a knee replacement operation, and avoids the problem that when the intercondylar osteotomy module 100 '(shown in fig. 1) in the prior art is used for osteotomy of the femoral intercondylar sulcus of a human body, the accuracy of the osteotomy position and the osteotomy amount cannot be effectively guaranteed, so that effective installation cannot be guaranteed when the femoral condyle test model is subsequently installed, and the intercondylar osteotomy module 100' is applied again for osteotomy after the femoral condyle test model is taken down, namely, re-osteotomy correction which may occur before the femoral condyle test model is installed is avoided.
Drawings
FIG. 1 is a schematic view of a prior art intercondylar osteotomy module;
FIG. 2 is a schematic view of an intercondylar osteotomy module of an embodiment of the present invention.
Detailed Description
For a better understanding of the objects, structure and function of the invention, an intercondylar osteotomy module of the present invention is described in further detail below in conjunction with the attached drawings.
As shown in fig. 2, which shows an intercondylar osteotomy module 100 according to an embodiment of the present invention, includes an osteotomy module 1 and a positioning module 2, a notch portion 11 is formed at a bottom of the osteotomy module 1, and the positioning module 2 is detachably fixed in the notch portion 11, such that when the positioning module 2 is fixed in the notch portion 11, the shape formed by the osteotomy module 1 and the positioning module 2 together is identical to a shape of a predetermined femoral condyle prosthesis, and when the positioning module 2 is removed from the notch portion 11, the notch portion 11 serves as a osteotomy.
It should be noted that the intercondylar osteotomy module 100 of the present invention may be used in a variety of joint replacement procedures requiring an intercondylar osteotomy and trial fitting, and is described herein by way of example only as a knee replacement procedure.
When the intercondylar osteotomy module 100 of the embodiment is used, the osteotomy module 1 is mounted on a human femur which is firstly cut, an osteotomy instrument is used for cutting the intercondylar notch of the human femur along the edge of the notch part 11, after the osteotomy is finished, the positioning module 2 is mounted on the notch part 11, so that the positioning module 2 and the osteotomy module 1 form a fixed connection, because the shape formed by the osteotomy module 1 and the positioning module 2 together is consistent with the shape of a preset femoral condyle prosthesis, the connected osteotomy module 1 and the positioning module 2 can be jointly used as a femoral condyle trial model, that is, the intercondylar osteotomy module 100 of the embodiment of the application can replace the femoral condyle prosthesis with the femoral condyle trial model parameters to determine in advance whether the femoral prosthesis can be completely adapted to the platform cushion prosthesis or not and ensure the use function of the knee joint. Compared with the prior art, the intercondylar osteotomy module 100 of the embodiment abandons the use of the existing femoral condyle test model in the operation process of the operation, reduces the times of repeatedly disassembling and assembling the intercondylar osteotomy module 100 ', not only avoids the problem that the intercondylar osteotomy module 100' needs to be installed again for osteotomy correction when the femoral condyle test model is installed, but also simplifies the operation process on the basis of meeting the operation requirements and saves the operation time.
According to the intercondylar osteotomy module 100 of the present embodiment, the osteotomy module 1 and the positioning module 2 may be made of metal material, preferably titanium alloy material.
As shown in fig. 2, according to the intercondylar osteotomy module 100 of the present embodiment, one of an inner wall of the notch portion 11 and an outer edge of the positioning module 2 opposite to the inner wall of the notch portion 11 may be formed with a press-fit projection 21, and the other may be formed with a press-fit groove 12 to be fitted with the press-fit projection 21. This arrangement allows the positioning module 2 to be fixedly connected to the osteotomy module 1 when a forward pushing force is applied thereto, and to be detachable from the osteotomy module 1 when a reverse pushing force is applied thereto.
In a preferred embodiment, the press-fit groove 12 may be formed on an inner wall of the notch portion 11, and the press-fit protrusion 21 may be formed on an outer edge of the positioning module 2 opposite to the inner wall of the notch portion 11. When the positioning module 2 and the osteotomy module 1 need to be installed together, the positioning module 2 only needs to be aligned with the notch part 11 of the osteotomy module 1, and thrust is continuously applied to the positioning module 2, so that the press-fit protrusion 21 of the positioning module 2 rubs and extrudes with the inner wall of the notch part 11, and enters the press-fit groove 12. The press-fit groove 12 may be configured to be formed with a transition slope from a start end (i.e., an end of the press-fit protrusion 21 first entering the press-fit groove 12) to a bottom of the notch, the transition slope serving to ensure less impact when the press-fit protrusion 21 enters the press-fit groove 12 while facilitating detachment of the positioning module 2 from the osteotomy module 1.
According to the intercondylar osteotomy module 100 of the present embodiment, at least one positioning groove 13 communicating with the notch portion 11 may be formed on the lateral surface 18 of the osteotomy module 1 near the notch portion 11, and a positioning projection 22 cooperating with the positioning groove 13 may be formed on an outer edge of the positioning module 2 opposite to the inner wall of the notch portion 11, wherein a depth of the positioning groove 13 may be configured such that the press-fit projection 21 is press-fitted in the press-fit groove 12 when the positioning projection 22 abuts against the bottom wall of the positioning groove 13. The positioning protrusion 22 may be provided in a cylindrical shape as shown in fig. 2 or any other shape that can satisfy the positioning function. The positioning module 2 can be accurately installed in the osteotomy module 1 when the positioning module 2 and the osteotomy module 1 form an integrated structure by arranging the positioning groove 13 and the positioning protrusion 22, so that the function of femoral condyle trial molding can be accurately realized when the positioning module 2 and the osteotomy module 1 form an integrated structure, and the accuracy of the function of the knee joint realized when the subsequent femoral condyle prosthesis and the platform pad prosthesis are matched is improved.
In a preferred embodiment, the positioning grooves 13 may be symmetrically disposed at both sides of the notch portion 11. Through this setting can make the alignment of cutting bone module 1 and orientation module 2 more accurate, make the both sides atress of breach portion 11 more even simultaneously to ensure that orientation module 2 pushes in accurately steadily.
According to the intercondylar osteotomy module 100 of the present embodiment, the positioning module 1 may be formed with a through hole 23 for passing through the connection post of the plateau pad prosthesis, the through hole 23 not being in communication with the notch portion 11. The through hole 23 serves as a hole for passing through a connection post of a plateau pad prosthesis, and is used for realizing the rotational connection of the intercondylar osteotomy module 100 relative to the plateau pad within a certain range so as to meet the normal movement requirement of the human knee joint.
According to the intercondylar osteotomy module 100 of the present embodiment, a transverse strip-shaped osteotomy slot 14 may be further formed above the notch portion 11. Through the arrangement, an operation operator can conveniently cut the bone of the intercondylar cleft part of the human femoral bone. Specifically, after vertically inserting the osteotomy instrument into the transverse strip-shaped osteotomy groove 14 for osteotomy, the surgical operator then performs osteotomy on the osteotomy instrument along the two vertical side edges of the notch portion 11, and the osteotomy lines of the two vertical side edges of the notch portion 11 intersect with the osteotomy lines of the strip-shaped osteotomy groove 14, so that an osteotomy portion formed by a plurality of osteotomy lines together can be separated from the human femoral portion, thereby completing the osteotomy of the intercondylar sulcus of the femur.
According to the intercondylar osteotomy module 100 of the present embodiment, the osteotomy module 1 may further be formed with at least one fixing hole 15 for fixing the osteotomy module 1 to a human bone. Fixing connectors such as pins can be inserted into the fixing holes 15 to connect the pins with the human bone so as to prevent the osteotomy module 1 from shaking, and then the positioning module 2 is mounted on the osteotomy module 1.
Preferably, the fixing holes 15 of the osteotomy module 1 are plural and uniformly distributed on both sides of the osteotomy module 1. The osteotomy module 1 is more stably connected with the human femur through arrangement. More preferably, the fixing holes 15 may be distributed at edge positions of the top of the osteotomy module 1. It is also preferable that the fixing holes 15 are distributed on both sides of the bar-shaped osteotomy groove 14, which is advantageous in improving the stability of the osteotomy.
According to the intercondylar osteotomy module 100 of the present embodiment, the osteotomy module 1 may further be formed with mounting holes 16 on both sides of the notch portion 11. The number of mounting holes 16 is the same as the number of connections to the human femur on the femoral condyle prosthesis. With this arrangement, when the femoral condyle prosthesis is implanted into the human femur after the intercondylar osteotomy module 100 of the present embodiment is disassembled, the femoral condyle prosthesis is fixed to the human femur. Specifically, after the resection of the femoral intercondylar sulcus portion is completed and the function of the knee joint achieved when the intercondylar resection module 100 is matched with the platform pad prosthesis is confirmed, the intercondylar resection module 100 is detached from the human femur, a hole punched through the mounting hole 16 is left on the human femur, and the connecting column connected with the human femur on the femoral condylar prosthesis is inserted into the hole, so that the femoral condylar prosthesis can be well matched and positioned with the human femur.
According to the intercondylar osteotomy module 100 of the present embodiment, the osteotomy module 1 may further include a detachment slot 17 disposed on the osteotomy module 1. When it is necessary to detach the intercondylar osteotomy module 100 from the human femur after the osteotomy is completed and after the function of the knee joint that the intercondylar osteotomy module 100 can fit to the plateau pad prosthesis is confirmed, the removal tool is inserted into the removal slot 17 to remove the osteotomy module 1 from the human femur. The positioning module 2 is then removed from the osteotomy module 1.
Preferably, the removal grooves 17 may be provided on both sides of the lateral surface 18 of the osteotomy module 1 that cooperates with the platform pad, by which arrangement the operator can stably apply force to the osteotomy module 1 to avoid damage to the femur of the human body when the osteotomy module 1 is removed.
Compared with the prior art, the intercondylar osteotomy module 100 of the embodiment has a simple structure and is convenient to operate, integrates the functions realized by the intercondylar osteotomy module and a femoral condyle trial model together, and can perform an osteotomy operation on the intercondylar sulcus part of the femur when the osteotomy module 1 of the intercondylar osteotomy module 100 is used independently by arranging the positioning module 2 which is detachable from the osteotomy module 1 and forming the shape formed by the two modules together into the shape consistent with the femoral condyle prosthesis; when the positioning module 2 and the osteotomy module 1 are fixed, the femur condyle prosthesis can be used as a femur condyle test model so as to ensure the function of the knee joint realized when the femur condyle prosthesis and the platform pad prosthesis are fitted after the femur condyle prosthesis is subsequently installed. The intercondylar osteotomy module 100 of the present invention can replace a femoral condyle prosthesis consistent with femoral condyle trial parameters to predetermine whether the femoral condyle prosthesis can be fully fitted to a plateau pad prosthesis and ensure the functional use of the knee joint. Meanwhile, the intercondylar osteotomy module 100 of the embodiment abandons the use of the existing femoral condyle trial model in the operation process of the operation, reduces the times of repeatedly disassembling and assembling the intercondylar osteotomy module 100 ', not only avoids the problem that the intercondylar osteotomy module 100' needs to be installed again for osteotomy correction when the femoral condyle trial model is installed, but also simplifies the operation process on the basis of meeting the operation requirements and saves the operation time.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention, and they should be construed as being included in the following claims and description. In particular, the technical features mentioned in the embodiments can be combined in any way as long as there is no structural conflict. It is intended that the invention not be limited to the particular embodiments disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.

Claims (10)

1. An intercondylar osteotomy module comprising an osteotomy module having a base formed with a notch portion and a positioning module removably secured in the notch portion such that when the positioning module is secured in the notch portion, the osteotomy module and the positioning module together form a shape conforming to a shape of a predetermined femoral condyle prosthesis, and when the positioning module is removed from the notch portion, the notch portion acts as a resection port.
2. The intercondylar osteotomy module of claim 1, wherein one of an inner wall of said notch portion and an outer edge of said positioning module opposite said inner wall of said notch portion has a press-fit projection formed thereon, and the other has a press-fit groove formed thereon for engaging said press-fit projection.
3. The intercondylar osteotomy module of claim 2, wherein the press-fit groove is formed on an inner wall of the notch portion, the press-fit projection being formed on an outer edge of the positioning module opposite the inner wall of the notch portion.
4. The intercondylar osteotomy module of claim 3, wherein an outer side of said osteotomy module proximal to said notch portion is formed with at least one positioning slot communicating with said notch portion, an outer edge of said positioning module opposite to an inner wall of said notch portion is formed with a positioning projection engaging said positioning slot, wherein a depth of said positioning slot is configured such that said press-fit projection is press-fit in said press-fit groove when said positioning projection abuts against a bottom wall of said positioning slot.
5. The intercondylar osteotomy module of claim 4, wherein said detents are symmetrically disposed on either side of said notch portion.
6. The intercondylar osteotomy module of any one of claims 1-5, wherein said positioning module has a through hole formed therein for passing through an attachment post of a plateau pad prosthesis, said through hole not communicating with said notch.
7. The intercondylar osteotomy module of any one of claims 1-5, further defining a transverse, strip-shaped osteotomy slot above said gap portion.
8. The intercondylar osteotomy module of any one of claims 1-5, further defining at least one fixation hole therein for securing said osteotomy module to a human bone.
9. The intercondylar osteotomy module of any one of claims 1-5, wherein said osteotomy module further has mounting holes formed on both sides of said notch portion.
10. The intercondylar osteotomy module of any one of claims 1-5, further comprising a removal slot disposed on the osteotomy module.
CN201911114330.2A 2019-11-14 2019-11-14 Intercondylar osteotomy module Pending CN110801264A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112617958A (en) * 2020-11-28 2021-04-09 北京市春立正达医疗器械股份有限公司 Novel thighbone condyle cuts bone subassembly
CN114176712A (en) * 2021-12-06 2022-03-15 开封市人民医院 Secondary osteotomy device for femoral condyle test
CN114271894A (en) * 2021-11-30 2022-04-05 北京纳通医疗科技控股有限公司 Surgical instrument

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112617958A (en) * 2020-11-28 2021-04-09 北京市春立正达医疗器械股份有限公司 Novel thighbone condyle cuts bone subassembly
CN114271894A (en) * 2021-11-30 2022-04-05 北京纳通医疗科技控股有限公司 Surgical instrument
CN114271894B (en) * 2021-11-30 2024-01-09 北京纳通医疗科技控股有限公司 Surgical instrument
CN114176712A (en) * 2021-12-06 2022-03-15 开封市人民医院 Secondary osteotomy device for femoral condyle test
CN114176712B (en) * 2021-12-06 2023-07-07 开封市人民医院 Femur trial condyle secondary osteotomy device

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