Femoral osteotomy guider

Abstract

The utility model relates to a thighbone osteotomy guider which comprises a guide plate, a matching part is arranged on the guide plate, and the matching part comprises a binding face capable of being matched with bone faces of different parts of a thighbone; a drilling guide block is arranged on the guide plate, a guide column hole is formed in the drilling guide block, and osteotomy grooves are formed in the guide plate and the drilling guide block; the guide plate comprises a positioning edge used for positioning and installing the guide plate on the femur. The femur osteotomy guider can be effectively and reliably placed on the bone surface of the distal femur after osteotomy, and the accuracy of osteotomy operation can be enhanced.

Description

Technical Field

[0001] The present application relates to the technical field of medical devices, and in particular to a femoral osteotomy guide. Background Art

[0002] Unicompartmental knee replacement is a partial knee replacement that replaces or reshapes only a portion of the patient's knee to relieve severe discomfort caused by arthritis of the lateral or medial condylar cartilage of the knee. It is considered a minimally invasive alternative to total knee replacement, in which the condylar bones of the distal femur and proximal tibia are completely removed and reshaped with femoral and tibial prosthetic devices.

[0003] Because unicompartmental knee arthroplasty relies on the patient's stability to provide structure, the accuracy of placement of the unicompartmental knee arthroplasty prosthesis components is crucial to the success of the arthroplasty, the patient's postoperative recovery, and the achievement of normal postoperative joint function.

[0004] 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 surgeries cannot be guaranteed.

[0005] The success of unicompartmental knee arthroplasty still relies heavily on the surgeon’s experience and expertise, and the surgeon often needs to adjust the resection site based on the patient’s specific anatomy to ensure that the prosthetic device fits correctly and to ensure accurate alignment of the joint after surgery.

[0006] There are currently no standardized instruments or femoral and tibial resection templates or guides that surgeons can rely on to provide appropriate resection of the femoral and tibial platforms to insert the femoral and tibial components. Considering the shortcomings of traditional unicompartmental knee replacement, it is difficult to ensure the accuracy of the prosthesis implant position and the accuracy of force line restoration. Therefore, with the development and application of 3D printing technology in orthopedics, doctors can make models of the surgical site before surgery to conduct preoperative planning and doctor-patient communication; at the same time, 3D printing technology can also be used to make intraoperative templates to assist intraoperative operations, but there are still problems such as unstable positioning, resulting in inaccurate osteotomy, increased operation time, and even surgical failure. Utility Model Content

[0007] The purpose of the present application is to provide a femoral osteotomy guide that can be effectively and reliably placed on the bone surface after distal femoral osteotomy, thereby helping to enhance the accuracy of the osteotomy operation.

[0008] In order to achieve the above object, the utility model provides a femoral osteotomy guide, comprising a guide plate, wherein a matching portion is provided on the guide plate, and the matching portion comprises a fitting surface that can be matched with bone surfaces of different parts of the femur;

[0009] The guide plate is provided with a drilling guide block, the drilling guide block is provided with a guide column hole, and the guide plate and the drilling guide block are provided with an osteotomy groove;

[0010] The guide plate includes a positioning edge for positioning it on the femur.

[0011] In an optional embodiment, the guide plate includes a flat plate structure, the matching portion includes a plurality of matching blocks arranged on the guide plate, and the fitting surfaces are respectively arranged on the matching blocks.

[0012] In an optional embodiment, the matching block includes a first matching block, and the inner side wall of the first matching block includes an anteromedial distal femoral fitting surface that can match the anteromedial bone surface of the femur.

[0013] In an optional embodiment, the matching block includes a second matching block, and the inner side wall of the second matching block includes an intercondylar notch fitting surface capable of matching with the intercondylar notch.

[0014] In an optional embodiment, the matching block includes a third matching block, and the inner side wall of the third matching block includes a posterior femoral condyle fitting surface that can match the posterior femoral condyle bone surface.

[0015] In an optional embodiment, the drilling guide block is inclined relative to the guide plate, and the guide column hole extends along the inclined direction of the drilling guide block and integrally penetrates the drilling guide block and the guide plate.

[0016] In an optional embodiment, the drilling guide block includes a first guide block and a second guide block, and the guide column hole includes a first guide column hole and a second guide column hole that are correspondingly arranged;

[0017] The osteotomy groove includes a first flat cut groove and a second flat cut groove which are arranged obliquely relative to the guide plate. The first flat cut groove extends longitudinally along the first guide column hole, and the second flat cut groove extends transversely along the second guide column hole, and respectively includes side cut grooves located on the same side of the guide plate and the drilling guide block.

[0018] In an optional embodiment, the first flat-cut groove and the second flat-cut groove extend toward each other and penetrate the drilling guide block and the guide plate respectively, and the first flat-cut groove is formed on a longitudinal section of the first guide column hole.

[0019] In an optional embodiment, the contour of the positioning edge is the same as the bone surface contour after distal femoral osteotomy.

[0020] In an optional embodiment, the guide plate is further provided with a plurality of fixing holes, and the extension direction of each of the fixing holes on the guide plate is different.

[0021] By providing a matching part on the guide plate and providing a fitting surface on the matching part that can adapt to the bone surfaces of different parts of the femur, a multi-faceted fitting form can be formed, thereby enhancing the stability and uniqueness of the femoral osteotomy guide, and achieving the technical goals of stable and reliable installation and precise osteotomy.

[0022] The drilling guide block arranged on the guide plate and the guide column hole arranged on the drilling guide block can provide a good guiding effect for the drilling operation, which is beneficial to the processing of the bone hole required for the subsequent prosthesis installation on the femur.

[0023] The osteotomy grooves provided on the guide plate and the drilling guide block can facilitate the insertion of the osteotomy oscillating saw, and can effectively perform the osteotomy operation.

[0024] The guide plate can be positioned and installed on the femur by the positioning edge included in the guide plate, and the accuracy of the placement of the guide device on the femur can be ensured by aligning the positioning edge with the edge after the distal femoral osteotomy.

[0025] Other features and advantages of the present application will be described in detail in the subsequent detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0027] Figure 1 It is a schematic diagram of the structure of the femoral osteotomy guide in this application;

[0028] Figure 2 It is a schematic diagram of the top structure of the femoral osteotomy guide in this application;

[0029] Figure 3 This is a schematic diagram of the installation structure of the femoral osteotomy guide on the femur in this application.

[0030] icon:

[0031] 1-guide plate; 11-positioning edge;

[0032] 2-drilling guide block; 21-first guide block; 22-second guide block;

[0033] 3-guide post hole; 31-first guide post hole; 32-second guide post hole;

[0034] 4-osteotomy groove; 41-first flat cutting groove; 42-second flat cutting groove;

[0035] 5-matching block; 51-first matching block; 52-second matching block; 53-third matching block;

[0036] 6-fitting surface; 61-anteromedial distal femoral fitting surface; 62-intercondylar fossa fitting surface; 63-posterior femoral condyle fitting surface;

[0037] 7-Fixing hole;

[0038] 8- Femur. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0040] In the description of this application, it should be noted that the terms "inside", "outside", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the application is usually placed when in use, which is only for the convenience of describing this application and simplifying the description, and does not indicate or imply 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 a limitation on this application. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0041] In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "disposed" 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 direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0042] The femoral osteotomy guide in the present application is mainly used for unicompartmental knee replacement. It is specifically placed on the bone surface after the distal femoral osteotomy, and part of the structure of the femur 8 is removed and the bone holes required for prosthesis installation are drilled.

[0043] By setting up the guide plate 1 structure, and setting different matching parts and fitting surfaces 6 on the guide plate 1 that are compatible with the bone surfaces of different parts of the femur 8, a good guiding role can be played, thereby ensuring the accuracy of the osteotomy of the femur 8 and the success rate of the operation. At the same time, by forming a special positioning structure, the reliability and repeatability of the installation of the guide on the bone surface of the femur 8 after osteotomy can be enhanced, thereby reducing the risk probability of clinical accidents.

[0044] The femoral osteotomy guide of the utility model is placed on the bone surface after the distal end of the femoral 8 is osteotomized, and the osteotomy and drilling operations are performed after positioning and fixing.

[0045] See also Figure 1 , and combined with Figure 2-Figure 3 The femoral osteotomy guide 8 in the utility model has a main structure including a guide plate 1, on which a matching portion is provided. The matching portion is mainly used to enable the guide to be positioned and installed at the distal end of the femur 8, and the matching compatibility between the femoral osteotomy guide 8 and the bone surface is enhanced by a fitting surface 6 provided on the matching portion that can be matched with the bone surface of different parts of the femur 8.

[0046] A drilling guide block 2 is provided on the guide plate 1, which, combined with the guide column hole 3 provided on the drilling guide block 2, can facilitate the entry of the drill bit and help the drill bit pass through the drilling guide block 2 and the guide plate 1 to drill the bone hole on the femur 8.

[0047] The osteotomy groove 4 provided on the guide plate 1 and the drilling guide block 2 can perform osteotomy on the femur 8. By cutting off part of the structure of the femur 8, the adaptability of the subsequent prosthesis installed on the femur 8 can be enhanced.

[0048] By providing the guide post hole 3 and the osteotomy groove 4, the bone hole and the bone groove required for the prosthesis installation can be processed on the femur 8, thereby enhancing the matching compatibility between the prosthesis and the bone hole and the bone groove after osteotomy.

[0049] Combined with the positioning edge 11 included in the guide plate 1 for positioning it on the femur 8, the accuracy of the guide being installed on the femur 8 can be verified when the edge of the guide plate 1 is aligned with the edge of the distal end of the femur 8 after osteotomy, thereby improving the installation efficiency of the guide and ensuring the accuracy of the overall installation of the guide on the femur 8.

[0050] In one specific embodiment, the guide plate 1 includes a flat plate structure that can fit the bone surface of the distal femur 8 after osteotomy.

[0051] The matching part includes a plurality of matching blocks 5 arranged on the guide plate 1 toward the side of the femur 8. By setting the fitting surface 6 on the matching block 5, a three-dimensional matching fit can be formed, so that the guide as a whole can be stably and effectively fitted and fixed to the bone surfaces of different parts of the femur 8.

[0052] In this embodiment, a plurality of fitting surfaces 6 are included, and each fitting surface 6 corresponds to a matching block 5 in a one-to-one relationship.

[0053] Specifically, the matching blocks 5 include a first matching block 51 , a second matching block 52 and a third matching block 53 , and each matching block 5 is provided with a fitting surface 6 adapted to the bone surfaces of different parts of the femur 8 .

[0054] Among them, the inner wall of the first matching block 51 includes an anterior medial distal femoral fitting surface 61 that can match the anterior medial bone surface of the femur 8; the inner wall of the second matching block 52 includes an intercondylar fossa fitting surface 62 that can match the intercondylar fossa; and the inner wall of the third matching block 53 includes a posterior femoral condyle fitting surface 63 that can match the posterior condyle bone surface of the femur 8.

[0055] Through the above-mentioned anteromedial distal femoral fitting surface 61, intercondylar fossa fitting surface 62 and posterior femoral condyle fitting surface 63, the guide can be fitted to different bone surface positions of the distal femur 8 after osteotomy, effectively enhancing the adaptability and compatibility between the guide and the femur 8 in three-dimensional space.

[0056] In another specific embodiment, from the perspective of drilling and osteotomy, the drilling guide block 2 includes a first guide block 21 and a second guide block 22 , which provide a necessary structural basis for the setting of the guide column hole 3 .

[0057] Furthermore, the guide post hole 3 includes a first guide post hole 31 and a second guide post hole 32 which are correspondingly arranged; the first guide post hole 31 is provided on the first guide block 21 , and the second guide post hole 32 is provided on the second guide block 22 , which can play a good guiding role in drilling.

[0058] The osteotomy groove 4 includes a first flat cutting groove 41 and a second flat cutting groove 42 which are arranged obliquely relative to the guide plate 1. The arrangement of the flat cutting grooves facilitates the insertion of the osteotomy oscillating saw and facilitates the osteotomy operation.

[0059] The first flat-cut groove 41 is formed on the first guide block 21 , and the second flat-cut groove 42 is formed on the second guide block 22 . Preferably, the first flat-cut groove 41 extends longitudinally along the first guide post hole 31 , and the second flat-cut groove 42 extends transversely along the second guide post hole 32 .

[0060] Based on the inclined setting of the drilling guide block 2 relative to the guide plate 1, osteotomy can be performed in different inclined directions relative to the guide plate 1 through the first flat cutting groove 41 and the second flat cutting groove 42, so as to facilitate the formation of the intersection of the drilling and osteotomy directions in the three-dimensional space, thereby ensuring the drilling and osteotomy effect of the femur 8.

[0061] Furthermore, the first flat-cut groove 41 and the second flat-cut groove 42 respectively include side-cut grooves located on the same side of the guide plate 1 and the drilling guide block 2 .

[0062] The side cutting notch is specifically an open notch, and the side cutting notch is integrally connected on the guide block and the drilling guide block 2, which can facilitate the lateral extension of the osteotomy oscillating saw and increase the operating space of the osteotomy oscillating saw.

[0063] The first flat cut groove 41 and the second flat cut groove 42 are specifically arranged to extend toward each other and penetrate the drilling guide block 2 and the guide plate 1 as a whole, respectively, and can form a partial intersection in the osteotomy direction, thereby creating conditions for adjusting the osteotomy range.

[0064] Based on the above-mentioned first flat-cut groove 41 extending along the longitudinal direction of the first guide post hole 31 , the first flat-cut groove 41 is formed on the longitudinal section of the first guide post hole 31 .

[0065] Preferably, the side cutting notch of the first flat cutting groove 41 is arranged at a part of the first guide column hole 31, so that osteotomy can be performed at the drilling site, so that the drilling site and the osteotomy site can be partially crossed, thereby enhancing the compatibility of the osteotomy drilling operation.

[0066] In the utility model, the contour of the positioning edge 11 on the guide plate 1 is the same as the bone surface contour after the distal osteotomy of the femur 8. When placing the guide, the accuracy of the installation of the guide on the femur 8 can be verified by aligning the contour of the positioning edge 11 with the distal osteotomy boundary of the femur 8.

[0067] Combined with the multiple fitting surfaces 6 described above, the stability and uniqueness of the guide can be enhanced, thereby achieving the technical purpose of precise osteotomy.

[0068] The guide plate 1 is also provided with a plurality of fixing holes 7, each of which extends in a different direction on the guide plate 1. By passing fixing pins with different extension directions through the fixing holes 7 and embedding them into the femur 8, the installation stability of the guide on the femur 8 can be ensured.

[0069] The femoral osteotomy guide of the utility model is placed on the bone surface after osteotomy at the distal end of the femur 8, and is fitted with the anteromedial distal bone surface of the femur 8, the intercondylar fossa bone surface and the posterior condylar bone surface of the femur 8. Through multi-faceted fitting and the alignment of the positioning edge 11 of the guide plate 1 with the bone surface contour after osteotomy at the distal end of the femur 8, the surgeon can judge the accuracy of the plan.

[0070] Through multi-faceted alignment, the stability and uniqueness of the guide are enhanced to achieve precise osteotomy, so that preoperative planning can be realized during the operation to achieve the best surgical effect.

[0071] The setting of the guide column hole 3 and the osteotomy groove 4 provides personalized precise osteotomy and enhances the stability of the guide plate. At the same time, it can avoid the doctor's barehanded operation and reduce clinical operation errors. The femoral osteotomy guide 8 in the utility model is simple and practical, which can greatly shorten the doctor's learning curve and improve the operation efficiency while enhancing the accuracy of osteotomy.

[0072] It should be noted that, in the absence of conflict, the features in the embodiments of this application may be combined with each other.

[0073] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A femoral osteotomy guide, characterized in that: It comprises a guide plate, on which a matching part is arranged, and the matching part comprises a fitting surface that can be matched with bone surfaces of different parts of the femur; The guide plate is provided with a drilling guide block, the drilling guide block is provided with a guide column hole, and the guide plate and the drilling guide block are provided with an osteotomy groove; The guide plate includes a positioning edge for positioning it on the femur.

2. The femoral osteotomy guide according to claim 1, characterized in that: The guide plate comprises a flat plate structure, the matching portion comprises a plurality of matching blocks arranged on the guide plate, and the fitting surfaces are respectively arranged on the matching blocks.

3. The femoral osteotomy guide according to claim 2, characterized in that: The matching block comprises a first matching block, the inner side wall of which comprises an anterior medial femoral distal end fitting surface capable of matching with an anteromedial femoral bone surface.

4. The femoral osteotomy guide according to claim 2, characterized in that: The matching block includes a second matching block, and the inner side wall of the second matching block includes an intercondylar fossa fitting surface capable of matching with the intercondylar fossa.

5. The femoral osteotomy guide according to claim 2, characterized in that: The matching block includes a third matching block, and the inner side wall of the third matching block includes a posterior femoral condyle fitting surface that can match the posterior femoral condyle bone surface.

6. The femoral osteotomy guide according to any one of claims 1 to 5, characterized in that: The drilling guide block is arranged obliquely relative to the guide plate, and the guide column hole extends along the oblique direction of the drilling guide block and integrally penetrates the drilling guide block and the guide plate.

7. The femoral osteotomy guide according to claim 6, characterized in that: The drilling guide block includes a first guide block and a second guide block, and the guide column hole includes a first guide column hole and a second guide column hole that are correspondingly arranged; The osteotomy groove includes a first flat cut groove and a second flat cut groove which are arranged obliquely relative to the guide plate. The first flat cut groove extends longitudinally along the first guide column hole, and the second flat cut groove extends transversely along the second guide column hole, and respectively includes side cut grooves located on the same side of the guide plate and the drilling guide block.

8. The femoral osteotomy guide according to claim 7, characterized in that: The first flat-cut groove and the second flat-cut groove extend toward each other and respectively penetrate the drilling guide block and the guide plate as a whole. The first flat-cut groove is provided on the longitudinal section of the first guide column hole.

9. The femoral osteotomy guide according to claim 6, characterized in that: The contour of the positioning edge is the same as the bone surface contour after distal femoral osteotomy.

10. The femoral osteotomy guide according to claim 6, characterized in that: The guide plate is also provided with a plurality of fixing holes, and the extending directions of each of the fixing holes on the guide plate are different.

Images