Unicondylar arthroplasty osteotomy guide plate
By designing a unicondylar replacement osteotomy guide plate for unicondylar knee arthroplasty, the problems of excessive tibia and joint downward movement caused by insufficient posterior condylar space are solved, and the stable positioning and flexible adjustment of the guide plate and femur are achieved, and the quality and reliability of prosthesis installation are improved.
Patent Information
- Application Number
- CN202420993883.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-09
- Publication Date
- 2025-04-22
- Estimated Expiration
- 2034-05-09
AI Technical Summary
In unicondylar knee arthroplasty, insufficient posterior condylar space leads to the fixed position of the columnar fora of the femoral prosthesis and cannot be modified. It must be compensated by multiple tibia interception, resulting in excessive osteotomy and downward movement of the joint line, affecting the long-term effect.
A single condyle replacement osteotomy guide plate is designed, including the main body, the posterior condyle osteotomy and the positioning part. Through the design of the column hole, the positioning hole and the posterior condyle osteotomy groove, the stable positioning and flexible adjustment of the guide plate and the femur are achieved, ensuring the accuracy and reliability of the posterior condyle osteotomy.
Through the use of this guide plate, the position of the posterior condyle osteotomy groove can be adjusted without the need for multiple tibial entrapment, ensuring sufficient flexion gap, improving the installation position quality of the femoral prosthesis, and reducing the risk of excessive tibial osteotomy and joint downward movement.
Smart Images
Figure CN222777351U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of medical auxiliary equipment, and in particular to a unicompartmental replacement osteotomy guide plate. Background Art
[0002] Unicompartmental knee arthroplasty (UKA) relies on the patient's stability to provide structure, so the accuracy of UKA prosthetic component placement is crucial to the success of the arthroplasty, the patient's postoperative recovery, and the acquisition of normal joint function after surgery. The prosthetic devices and resection templates currently used in knee surgery rely heavily on subjective factors, which are determined by the experience and expertise of the operating surgeon. Therefore, the reliability and reproducibility of these operations cannot be guaranteed.
[0003] UKA osteotomy follows the principle of "cut as much as you can and fill as much as you can", and at the same time, the same flexion and extension gap must be maintained. The traditional method is to first perform tibial plateau osteotomy, measure and obtain sufficient extension gap, and then perform femoral osteotomy. The femoral medullary cavity is positioned, and the femoral drilling guide and intramedullary rod are combined through the intramedullary rod connector, so that the direction of the drilling guide is parallel to the mechanical axis of the femur. At the same time, it is flexed 10°, the posterior condyle is hooked, and the guide hole is placed in the center of the femoral condyle. After drilling, the posterior condyle osteotome is inserted, the posterior condyle osteotomy is performed, and finally the posterior condyle gap is measured. However, when the posterior condyle gap is insufficient, the position of the femoral prosthesis column hole has been determined, that is, the position of the femoral prosthesis cannot be modified, and it can only be compensated by cutting more tibia, which will lead to excessive tibial osteotomy, the joint line is lowered, and a smaller tibial plateau prosthesis is forced to be selected, which may even be unfavorable for revision in the long term. Utility Model Content
[0004] The purpose of the present application is to provide a unicompartmental replacement osteotomy guide plate in view of at least one technical problem involved in the background technology.
[0005] In order to achieve the above objectives, this application adopts the following technical solutions:
[0006] One aspect of the present application provides a unicompartmental replacement osteotomy guide plate, comprising a main body, a posterior condylar osteotomy portion and a positioning portion, the posterior condylar osteotomy portion being fixed to the main body, the main body and the posterior condylar osteotomy portion being arranged in a first direction, the positioning portion being fixed to the main body, the main body and the positioning portion being arranged in a second direction, a column hole being formed on the main body, a first positioning hole and a second positioning hole being formed on the positioning portion, the first positioning hole and the second positioning hole being arranged in the first direction, and the second positioning hole being arranged close to the posterior condylar osteotomy portion, a posterior condylar osteotomy groove being formed on the posterior condylar osteotomy portion, the first positioning hole, the second positioning hole and the column hole being through holes extending in a third direction, the posterior condylar osteotomy groove penetrating the posterior condylar osteotomy portion in the third direction, and the first direction, the second direction and the third direction being perpendicular to each other.
[0007] Optionally, the unicompartmental replacement osteotomy guide plate provided in the present application includes two positioning portions, and the two positioning portions are fixed to both sides of the main body portion in a one-to-one correspondence in the second direction.
[0008] The beneficial effect of this technical solution is that by providing two positioning parts, the unicompartmental replacement osteotomy guide plate can be positioned and fixed to the femur through the two positioning parts, thereby improving the stability and reliability of the positioning of the unicompartmental replacement osteotomy guide plate and the femur.
[0009] Optionally, the unicompartmental replacement osteotomy guide provided in the present application further includes two intramedullary rod connecting parts, which are fixed one-to-one on both sides of the main body in the second direction, and an intramedullary rod hole is formed on the intramedullary rod connecting parts, and the extension direction of the intramedullary rod hole is inclined relative to the third direction.
[0010] The beneficial effect of this technical solution is that the intramedullary rod connecting part is used to connect with the intramedullary rod in the femur, and the two intramedullary rod connecting parts are suitable for left or right unicompartmental replacement, so that the third direction is inclined relative to the intramedullary rod to meet the flexion requirement of the installed prosthesis.
[0011] Optionally, the unicompartmental replacement osteotomy guide provided in the present application further includes a positioning reinforcement portion, wherein the main body portion, the positioning reinforcement portion and the posterior condyle osteotomy portion are sequentially connected in the first direction, and a first positioning reinforcement hole is formed on the positioning reinforcement portion, wherein the first positioning reinforcement hole is a through hole extending in the third direction.
[0012] The beneficial effect of this technical solution is that after the steel nail is implanted in the first positioning hole, a steel nail can also be implanted in the first positioning reinforcement hole to make the positioning between the unicompartmental replacement osteotomy guide plate and the femur more reliable and firm, so that the posterior condylar osteotomy can be carried out more smoothly.
[0013] Optionally, a second positioning reinforcement hole is also formed on the positioning reinforcement portion, and the second positioning reinforcement hole is a through hole extending in the third direction. The first positioning reinforcement hole and the second positioning reinforcement hole are arranged in the first direction, and the first positioning reinforcement hole is arranged closer to the posterior condyle osteotomy portion than the second positioning reinforcement hole.
[0014] The beneficial effect of this technical solution is that, when the posterior condylar osteotomy posterior flexion gap is insufficient, the steel nail originally matched with the first positioning hole is matched with the second positioning hole, and another steel nail is implanted in the second positioning reinforcement hole, so that the positioning between the unicompartmental replacement osteotomy guide plate and the femur is more reliable and firm, so that the posterior condylar osteotomy can be performed again more smoothly.
[0015] Optionally, the unicompartmental replacement osteotomy guide plate provided in the present application also includes a posterior condyle positioning plate, which is arranged perpendicular to the first direction, and the main body, the positioning reinforcement part, the posterior condyle osteotomy part and the posterior condyle positioning plate are connected in sequence in the first direction, and the main body has a femoral contact surface, and the femoral contact surface is arranged toward the posterior condyle positioning plate, and the posterior condyle positioning plate is used to contact the posterior condyle of the femur.
[0016] The beneficial effect of this technical solution is that by setting a posterior condyle positioning plate and making the posterior condyle positioning plate contact with the posterior condyle of the femur before implanting the steel nail into the first positioning hole, the relative position of the unicompartmental replacement osteotomy guide plate and the posterior condyle of the femur in the first direction can be first limited, thereby facilitating the subsequent accurate determination of the position of the first positioning hole, so as to more accurately implant the steel nail into the first positioning hole.
[0017] Optionally, the unicompartmental replacement osteotomy guide plate provided in the present application further includes an arcuate connecting portion, which extends in an arc shape in the length direction of the arcuate connecting portion, and one end of the arcuate connecting portion is connected to the posterior condyle osteotomy portion in the length direction of the arcuate connecting portion, and the other end of the arcuate connecting portion is connected to the posterior condyle positioning plate, and the concave surface of the arcuate connecting portion is used to face the femur.
[0018] The beneficial effect of this technical solution is that, compared with connecting the posterior condylar osteotomy portion and the posterior condylar positioning plate through a linear connecting portion, the posterior condylar osteotomy portion and the posterior condylar positioning plate are connected through an arc-shaped connecting portion, which is less likely to interfere with the femur when the unicompartmental replacement osteotomy guide plate is connected to the femur.
[0019] Optionally, an auxiliary hole is also formed on the main body portion, the auxiliary hole is a through hole extending in the third direction, the column hole and the auxiliary hole are arranged in the first direction, the column hole is arranged closer to the posterior condyle osteotomy portion relative to the auxiliary hole, and the aperture of the auxiliary hole is different from the aperture of the column hole.
[0020] The beneficial effect of this technical solution is that the column hole and the auxiliary hole are respectively used to implant steel nails of different diameters into the femur, and when installing the prosthesis, the steel nails of different diameters facilitate identification of the installation position and installation angle of the prosthesis.
[0021] Optionally, the unicompartmental replacement osteotomy guide plate provided in the present application further includes a first steel nail guide cylinder, the first steel nail guide cylinder is fixed to the main body, the inner hole of the first steel nail guide cylinder is coaxially arranged with the column hole, the main body has a femoral contact surface and the first steel nail guide cylinder is located on a side of the main body away from the femoral contact surface; and / or,
[0022] The unicompartmental replacement osteotomy guide plate also includes a second steel nail guide cylinder, which is fixed to the main body, the inner hole of the second steel nail guide cylinder is coaxially arranged with the auxiliary hole, the main body has a femoral contact surface and the second steel nail guide cylinder is located on the side of the main body away from the femoral contact surface.
[0023] The beneficial effect of this technical solution is that when implanting a steel nail, the implanted steel nail is guided by the first steel nail guide tube and the second steel nail guide tube, which can improve the accuracy and stability of the implantation.
[0024] Optionally, a size of the posterior condylar osteotomy portion in the second direction is greater than a size of other portions of the unicompartmental replacement osteotomy guide plate in the second direction, and a length direction of the posterior condylar osteotomy groove is the second direction.
[0025] The beneficial effect of this technical solution is that: in this way, the posterior condylar osteotomy portion and the posterior condylar osteotomy groove both have a greater length in the second direction, so that when an osteotomy knife is placed in the posterior condylar osteotomy groove to perform posterior condylar osteotomy, the osteotomy knife is not easy to twist, thereby improving the stability and accuracy of the posterior condylar osteotomy operation.
[0026] The technical solution provided by this application can achieve at least one of the following beneficial effects:
[0027] The unicompartmental replacement osteotomy guide provided in the present application can move the unicompartmental replacement osteotomy guide as a whole by changing the original first positioning hole that cooperates with the bone steel nail to the second positioning hole that cooperates with the bone steel nail when the flexion gap is found to be insufficient after completing a posterior condylar osteotomy. This allows the posterior condylar osteotomy groove to be moved to a position closer to the posterior condyle, so that the posterior condylar osteotomy can be performed again and sufficient flexion gap can be obtained, ultimately achieving a more ideal installation position for the corresponding femoral prosthesis without the need for multiple tibia cuts, and reducing the chances of excessive tibial osteotomy, lowering of the joint line, forcing the selection of a smaller tibial plateau prosthesis, and long-term disadvantages for revision.
[0028] The additional technical features and advantages of the present application will be more clearly explained in the following description, or can be understood through the specific practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS
[0029] In order to more clearly illustrate the technical solutions of the specific implementation methods of the present application, the following is a brief introduction to the drawings required for the description of the specific implementation methods. Obviously, the drawings described below are some implementation methods of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.
[0030] Figure 1 A schematic diagram of a three-dimensional structure at one angle of an implementation of a unicompartmental replacement osteotomy guide plate provided in an embodiment of the present application, wherein a steel nail is installed on the unicompartmental replacement osteotomy guide plate;
[0031] Figure 2 A schematic diagram of the three-dimensional structure from another angle of an implementation of a unicompartmental replacement osteotomy guide plate provided in an embodiment of the present application;
[0032] Figure 3 A schematic diagram of the three-dimensional structure of an embodiment of a unicompartmental replacement osteotomy guide plate provided in an embodiment of the present application from a third angle, wherein a steel nail is installed on the unicompartmental replacement osteotomy guide plate;
[0033] Figure 4 A schematic diagram of a three-dimensional structure at an angle of an embodiment of the unicompartmental replacement osteotomy guide plate provided in an embodiment of the present application installed on a femur, wherein the first positioning hole is connected to the femur through a steel nail, and the first positioning reinforcement hole is connected to the femur through another steel nail;
[0034] Figure 5 A schematic diagram of the three-dimensional structure from another angle of an embodiment of the unicompartmental replacement osteotomy guide provided in the present application is installed on the femur, wherein the second positioning hole is connected to the femur through a steel nail, and the second positioning reinforcement hole is connected to the femur through another steel nail.
[0035] Reference numerals:
[0036] 01-posterior condyle positioning plate; 02-arc-shaped connecting part;
[0037] 03- posterior condylar osteotomy part; 04- posterior condylar osteotomy groove;
[0038] 05-Steel nail; 06-Second positioning reinforcement hole;
[0039] 07-first steel nail guide cylinder; 08-column hole;
[0040] 09- auxiliary hole; 10- second steel nail guide tube;
[0041] 11-main body; 12-intramedullary rod connection part;
[0042] 13-femoral contact surface; 14-positioning reinforcement part;
[0043] 15- positioning part; 16- intramedullary rod hole;
[0044] 17-first positioning hole; 18-second positioning hole;
[0045] 19-first positioning reinforcement hole; 100-femur;
[0046] 200-Osteotomy knife. DETAILED DESCRIPTION
[0047] The technical solution of the present application will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present application.
[0048] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.
[0049] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.
[0050] like Figures 1 to 5As shown, one aspect of the present application provides a unicompartmental replacement osteotomy guide plate, comprising a main body 11, a posterior condylar osteotomy portion 03 and a positioning portion 15, wherein the posterior condylar osteotomy portion 03 is fixed to the main body 11, the main body 11 and the posterior condylar osteotomy portion 03 are arranged in a first direction, the positioning portion 15 is fixed to the main body 11, the main body 11 and the positioning portion 15 are arranged in a second direction, a column hole 08 is formed on the main body 11, and a first positioning hole 17 and a second positioning hole are formed on the positioning portion 15 18, the first positioning hole 17 and the second positioning hole 18 are arranged in the first direction, and the second positioning hole 18 is arranged close to the posterior condylar osteotomy portion 03, a posterior condylar osteotomy groove 04 is formed on the posterior condylar osteotomy portion 03, the first positioning hole 17, the second positioning hole 18 and the column hole 08 are all through holes extending in the third direction, the posterior condylar osteotomy groove 04 penetrates the posterior condylar osteotomy portion 03 in the third direction, and the first direction, the second direction and the third direction are perpendicular to each other.
[0051] In the embodiment of the present application, the distance between the center of the first positioning hole 17 and the center of the second positioning hole 18 is 1-5mm, for example, it can be 2mm, 3mm or 4mm, etc., preferably 2mm; in the embodiment of the present application, it may happen that the aperture of the first positioning hole 17 and the aperture of the second positioning hole 18 are both large, while the distance between the first positioning hole 17 and the second positioning hole 18 is small, at this time, the first positioning hole 17 and the second positioning hole 18 may partially overlap.
[0052] The unicompartmental replacement osteotomy guide provided in the embodiment of the present application corresponds to the model and structure of the prosthesis to be implanted in the patient. When in use, the unicompartmental replacement osteotomy guide is connected to the intramedullary rod through the intramedullary rod connecting portion 12, so that the main body is fitted with the bone surface, and a fixing nail is inserted along the first positioning hole 17 to fix the unicompartmental replacement osteotomy guide to the femur 100, and then the posterior condyle osteotomy groove 04 is used to perform posterior condyle osteotomy. After osteotomy, the guide is removed as a whole along the length direction of the fixing nail, and the fixing nail on the bone is temporarily retained. The flexion gap is measured, and when the flexion gap is appropriate, the fixing nail is installed along the length direction of the fixing nail. Return the unicompartmental replacement osteotomy guide plate, continue drilling and grinding the position on the femur 100 corresponding to the column hole 08, and complete the subsequent operation; when the posterior flexion gap after the posterior condyle osteotomy is insufficient due to reasons such as changes in the posterior tilt of the ligament or tibial osteotomy, move the unicompartmental replacement osteotomy guide plate as a whole along the first direction, and make the second positioning hole 18 cooperate with the fixing nail, that is, it is equivalent to moving the posterior condyle osteotomy groove 04 in the first direction to a position closer to the posterior condyle. After the movement, perform the posterior condyle osteotomy again, and drill through the column hole 08. At this time, the flexion gap will meet the surgical requirements.
[0053] The unicompartmental replacement osteotomy guide provided in the present application can be used to move the unicompartmental replacement osteotomy guide as a whole when the flexion gap is found to be insufficient after completing a posterior condylar osteotomy. The first positioning hole 17 that originally cooperates with the bone steel nail 05 can be changed to the second positioning hole 18 that cooperates with the bone steel nail, so as to move the posterior condylar osteotomy groove 04 to a position closer to the posterior condyle, so that the posterior condylar osteotomy can be performed again and a sufficient flexion gap can be obtained, thereby ultimately achieving a more ideal installation position for the corresponding femoral prosthesis 100 without the need for multiple tibia cuts, and reducing the probability of problems such as excessive tibia osteotomy, lowering of the joint line, forcing the selection of a smaller tibial plateau prosthesis, and long-term disadvantages for revision.
[0054] Optionally, the unicompartmental replacement osteotomy guide provided in the embodiment of the present application includes two positioning portions 15, and the two positioning portions 15 are fixed to both sides of the main body 11 in a one-to-one correspondence in the second direction. By providing two positioning portions 15, the unicompartmental replacement osteotomy guide can be positioned and fixed to the femur 100 through the two positioning portions 15, thereby improving the stability and reliability of the positioning of the unicompartmental replacement osteotomy guide and the femur 100.
[0055] Optionally, the unicompartmental replacement osteotomy guide provided in the embodiment of the present application further includes two intramedullary rod connection parts 12, which are fixed to both sides of the main body 11 in a one-to-one correspondence in the second direction, and an intramedullary rod hole 16 is formed on the intramedullary rod connection part 12, and the extension direction of the intramedullary rod hole 16 is inclined relative to the third direction. The intramedullary rod connection part 12 is used to connect with the intramedullary rod in the femur 100, and the provision of two intramedullary rod connection parts 12 is suitable for unicompartmental replacement on the left or right side, so that the third direction is inclined relative to the intramedullary rod to meet the requirements of the installed prosthesis flexion.
[0056] Optionally, the unicompartmental replacement osteotomy guide provided in the embodiment of the present application further includes a positioning reinforcement portion 14, wherein the main body portion 11, the positioning reinforcement portion 14 and the posterior condyle osteotomy portion 03 are sequentially connected in the first direction, and a first positioning reinforcement hole 19 is formed on the positioning reinforcement portion 14, wherein the first positioning reinforcement hole 19 is a through hole extending in the third direction. After the steel nail is implanted in the first positioning hole 17, a steel nail can also be implanted in the first positioning reinforcement hole 19, so that the positioning between the unicompartmental replacement osteotomy guide and the femur 100 is more reliable and firm, so that the posterior condyle osteotomy can be performed more smoothly.
[0057] Optionally, a second positioning reinforcement hole 06 is formed on the positioning reinforcement portion 14, and the second positioning reinforcement hole 06 is a through hole extending in the third direction. The first positioning reinforcement hole 19 and the second positioning reinforcement hole 06 are arranged in the first direction, and the first positioning reinforcement hole 19 is arranged closer to the posterior condyle osteotomy portion 03 than the second positioning reinforcement hole 06. In this way, when the posterior condyle osteotomy has insufficient flexion clearance, the steel nail originally matched with the first positioning hole 17 is matched with the second positioning hole 18, and another steel nail is implanted in the second positioning reinforcement hole 06, so that the positioning between the unicompartmental replacement osteotomy guide plate and the femur 100 is more reliable and firm, so that the posterior condyle osteotomy can be performed again more smoothly.
[0058] Optionally, the unicompartmental replacement osteotomy guide plate provided in the embodiment of the present application further includes a posterior condyle positioning plate 01, the posterior condyle positioning plate 01 is arranged perpendicular to the first direction, the main body 11, the positioning reinforcement portion 14, the posterior condyle osteotomy portion 03 and the posterior condyle positioning plate 01 are sequentially connected in the first direction, the main body 11 has a femoral contact surface 13, the femoral contact surface 13 is arranged toward the posterior condyle positioning plate 01, and the posterior condyle positioning plate 01 is used to contact the posterior condyle of the femur 100. By setting the posterior condyle positioning plate 01 and making the posterior condyle positioning plate 01 contact with the posterior condyle of the femur 100 before implanting the steel nail into the first positioning hole 17, the relative position of the unicompartmental replacement osteotomy guide plate and the posterior condyle of the femur 100 in the first direction can be firstly defined, thereby facilitating the accurate determination of the position of the first positioning hole 17 later, so as to more accurately implant the steel nail into the first positioning hole 17.
[0059] Optionally, the unicompartmental replacement osteotomy guide plate provided in the embodiment of the present application further includes an arcuate connection portion 02, which extends in an arc shape in the length direction of the arcuate connection portion 02, and one end of the arcuate connection portion 02 is connected to the posterior condyle osteotomy portion 03 in the length direction of the arcuate connection portion 02, and the other end of the arcuate connection portion 02 is connected to the posterior condyle positioning plate 01, and the concave surface of the arcuate connection portion 02 is used to face the femur 100. In this way, compared with connecting the posterior condyle osteotomy portion 03 and the posterior condyle positioning plate 01 through a linear connection portion, the arcuate connection portion 02 is used to connect the posterior condyle osteotomy portion 03 and the posterior condyle positioning plate 01, which is not easy to interfere with the femur 100 when the unicompartmental replacement osteotomy guide plate is connected to the femur 100.
[0060] Optionally, an auxiliary hole 09 is further formed on the main body 11, the auxiliary hole 09 is a through hole extending in the third direction, the column hole 08 and the auxiliary hole 09 are arranged in the first direction, the column hole 08 is arranged closer to the posterior condylar osteotomy part 03 than the auxiliary hole 09, and the aperture of the auxiliary hole 09 is different from that of the column hole 08. The column hole 08 and the auxiliary hole 09 are respectively used to implant steel nails 05 of different diameters into the femur 100, and when installing the prosthesis, the steel nails 05 of different diameters facilitate identification of the installation position and installation angle of the prosthesis.
[0061] Optionally, the unicompartmental replacement osteotomy guide plate provided in the embodiment of the present application further includes a first steel nail guide cylinder 07, wherein the first steel nail guide cylinder 07 is fixed to the main body 11, the inner hole of the first steel nail guide cylinder 07 is coaxially arranged with the column hole 08, the main body 11 has a femoral contact surface 13, and the first steel nail guide cylinder 07 is located on a side of the main body 11 away from the femoral contact surface 13; and / or,
[0062] The unicompartmental replacement osteotomy guide plate also includes a second steel nail guide cylinder 10, which is fixed to the main body 11. The inner hole of the second steel nail guide cylinder 10 is coaxially arranged with the auxiliary hole 09. The main body 11 has a femoral contact surface 13 and the second steel nail guide cylinder 10 is located on the side of the main body 11 away from the femoral contact surface 13.
[0063] That is to say, the embodiments of the present application include at least the following three implementation modes:
[0064] In a first embodiment, the unicompartmental replacement osteotomy guide plate further includes a first steel nail guide cylinder 07, the first steel nail guide cylinder 07 is fixed to the main body 11, the inner hole of the first steel nail guide cylinder 07 is coaxially arranged with the column hole 08, the main body 11 has a femoral contact surface 13, and the first steel nail guide cylinder 07 is located on a side of the main body 11 away from the femoral contact surface 13;
[0065] In a second embodiment, the unicompartmental replacement osteotomy guide plate further includes a second steel nail guide cylinder 10, the second steel nail guide cylinder 10 is fixed to the main body 11, the inner hole of the second steel nail guide cylinder 10 is coaxially arranged with the auxiliary hole 09, the main body 11 has a femoral contact surface 13, and the second steel nail guide cylinder 10 is located on a side of the main body 11 away from the femoral contact surface 13;
[0066] A third embodiment is that the unicompartmental replacement osteotomy guide plate also includes a first steel nail guide cylinder 07, which is fixed to the main body 11, and the inner hole of the first steel nail guide cylinder 07 is coaxially arranged with the column hole 08, the main body 11 has a femoral contact surface 13 and the first steel nail guide cylinder 07 is located on the side of the main body 11 away from the femoral contact surface 13; and the unicompartmental replacement osteotomy guide plate also includes a second steel nail guide cylinder 10, which is fixed to the main body 11, and the inner hole of the second steel nail guide cylinder 10 is coaxially arranged with the auxiliary hole 09, the main body 11 has a femoral contact surface 13 and the second steel nail guide cylinder 10 is located on the side of the main body 11 away from the femoral contact surface 13.
[0067] When implanting the steel nail, the implanted steel nail is guided by the first steel nail guide tube 07 and the second steel nail guide tube 10, which can improve the accuracy and stability of the implantation.
[0068] Optionally, the size of the posterior condylar osteotomy portion 03 in the second direction is greater than the size of other parts of the unicompartmental replacement osteotomy guide plate in the second direction, and the length direction of the posterior condylar osteotomy groove 04 is the second direction. In this way, the posterior condylar osteotomy portion 03 and the posterior condylar osteotomy groove 04 both have a greater length in the second direction, so that when the osteotomy knife 200 is placed in the posterior condylar osteotomy groove 04 to perform posterior condylar osteotomy, the osteotomy knife 200 is not easy to twist, thereby improving the stability and accuracy of the posterior condylar osteotomy operation.
[0069] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.
Claims
1. Unicompartmental osteotomy guide, characterized in that: The invention comprises a main body, a posterior condyle osteotomy part and a positioning part, wherein the posterior condyle osteotomy part is fixed to the main body, the main body and the posterior condyle osteotomy part are arranged in a first direction, the positioning part is fixed to the main body, the main body and the positioning part are arranged in a second direction, a column hole is formed on the main body, a first positioning hole and a second positioning hole are formed on the positioning part, the first positioning hole and the second positioning hole are arranged in the first direction, and the second positioning hole is arranged close to the posterior condyle osteotomy part, a posterior condyle osteotomy groove is formed on the posterior condyle osteotomy part, the first positioning hole, the second positioning hole and the column hole are all through holes extending in a third direction, the posterior condyle osteotomy groove penetrates the posterior condyle osteotomy part in the third direction, and the first direction, the second direction and the third direction are perpendicular to each other.
2. The unicompartmental replacement osteotomy guide according to claim 1, characterized in that: It comprises two positioning parts, and the two positioning parts are fixed on two sides of the main body in a one-to-one correspondence in the second direction.
3. The unicompartmental osteotomy guide according to claim 1, characterized in that: It also includes two intramedullary rod connecting parts, which are fixed to both sides of the main body one by one in the second direction, and an intramedullary rod hole is formed on the intramedullary rod connecting parts. The extension direction of the intramedullary rod hole is inclined relative to the third direction.
4. The unicompartmental replacement osteotomy guide according to claim 1, characterized in that: It also includes a positioning reinforcement part. In the first direction, the main body, the positioning reinforcement part and the posterior condyle osteotomy part are connected in sequence. A first positioning reinforcement hole is formed on the positioning reinforcement part. The first positioning reinforcement hole is a through hole extending in the third direction.
5. The unicompartmental replacement osteotomy guide according to claim 4, characterized in that: A second positioning reinforcement hole is also formed on the positioning reinforcement portion, and the second positioning reinforcement hole is a through hole extending in the third direction. The first positioning reinforcement hole and the second positioning reinforcement hole are arranged in the first direction, and the first positioning reinforcement hole is arranged closer to the posterior condyle osteotomy portion than the second positioning reinforcement hole.
6. The unicompartmental replacement osteotomy guide according to claim 4, characterized in that: It also includes a posterior condyle positioning plate, which is arranged perpendicular to the first direction. The main body, the positioning reinforcement part, the posterior condyle osteotomy part and the posterior condyle positioning plate are connected in sequence in the first direction. The main body has a femoral contact surface, and the femoral contact surface is arranged toward the posterior condyle positioning plate. The posterior condyle positioning plate is used to contact the posterior condyle of the femur.
7. The unicompartmental replacement osteotomy guide according to claim 6, characterized in that: It also includes an arc-shaped connecting portion, which extends in an arc shape in the length direction of the arc-shaped connecting portion, and one end of the arc-shaped connecting portion is connected to the posterior condyle osteotomy portion in the length direction of the arc-shaped connecting portion, and the other end of the arc-shaped connecting portion is connected to the posterior condyle positioning plate, and the concave surface of the arc-shaped connecting portion is used to face the femur.
8. The unicondylar replacement osteotomy guide according to any one of claims 1 to 7, characterized in that: An auxiliary hole is also formed on the main body portion, and the auxiliary hole is a through hole extending in the third direction. The column hole and the auxiliary hole are arranged in the first direction. The column hole is arranged closer to the posterior condyle osteotomy portion than the auxiliary hole, and the aperture of the auxiliary hole is different from the aperture of the column hole.
9. The unicompartmental replacement osteotomy guide according to claim 8, characterized in that: It also includes a first steel nail guide cylinder, which is fixed to the main body, the inner hole of the first steel nail guide cylinder is coaxially arranged with the column hole, the main body has a femoral contact surface and the first steel nail guide cylinder is located on a side of the main body away from the femoral contact surface; and / or, The unicompartmental replacement osteotomy guide plate also includes a second steel nail guide cylinder, which is fixed to the main body, the inner hole of the second steel nail guide cylinder is coaxially arranged with the auxiliary hole, the main body has a femoral contact surface and the second steel nail guide cylinder is located on the side of the main body away from the femoral contact surface.
10. The unicompartmental replacement osteotomy guide according to any one of claims 1 to 7, characterized in that: The size of the posterior condylar osteotomy portion in the second direction is greater than the size of other parts of the unicompartmental replacement osteotomy guide plate in the second direction, and the length direction of the posterior condylar osteotomy groove is the second direction.