Anti-overturning tibia osteotomy guide plate

Abstract

The utility model relates to the technical field of medical instruments, in particular to an anti-overturning tibia osteotomy guide plate. The anti-overturning tibial osteotomy guide plate comprises a base, a guide part and a tibial plateau positioning part, the tibial plateau positioning part is arranged on the base through the guide part and is used for guiding and positioning a tibial plateau; a horizontal osteotomy groove and a vertical osteotomy groove are formed in the tibial plateau positioning part, and the interior of the horizontal osteotomy groove communicates with the interior of the vertical osteotomy groove and used for adjusting the distance between the tibial plateau positioning part and the base; the tibia platform positioning part is provided with a tibia platform attaching face, the base is provided with a tibia front side attaching face, and the tibia front side attaching face can be attached to the tibia front side and the tibia platform for positioning. Through the arrangement of the tibia front side attaching face and the tibia platform attaching face, tibia osteotomy can be positioned at the same time, the placing accuracy of the guide plate is guaranteed, and the operation effect is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, in particular to an anti-turnover tibial osteotomy guide plate. Background Art

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

[0003] Since UKA relies on the patient's stability to provide structure, the accuracy of placement of UKA prosthetic components is critical to the success of the arthroplasty, the patient's postoperative recovery, and the achievement of normal postoperative joint function. 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.

[0004] The success of UKA still relies heavily on the experience and expertise of the surgeon, who often needs to adjust the resection site to the patient's specific anatomy to ensure that the prosthetic device fits properly and to ensure accurate joint alignment after surgery. There are currently no standardized instruments or femoral and tibial resection templates or guides that the surgeon can rely on to provide the appropriate resection of the femoral and tibial plateaus for insertion of the femoral and tibial components. Because of this, surgeons are still reluctant to perform UKA, and patients are reluctant to choose TKA over UKA, even in cases where UKA is indicated or may be appropriate.

[0005] Considering that traditional UKA has the disadvantages of being difficult to ensure the accuracy of the 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 carry out 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 and improve the reliability and accuracy of the surgery. There are also some positioning guides for unicompartmental replacement on the market, but due to the small incision of UKA and inaccurate positioning, abnormal tibial valgus osteotomy angles often occur, resulting in unstable prosthesis alignment, unsatisfactory surgical results, and ultimately affecting the life cycle of the prosthesis. Utility Model Content

[0006] The utility model aims to provide an anti-turnover tibial osteotomy guide plate, which can solve the above technical problems.

[0007] The embodiment of the utility model is achieved as follows:

[0008] The utility model provides an anti-turnover tibial osteotomy guide plate, comprising a base, a guide part and a tibial plateau positioning part;

[0009] The tibial plateau positioning portion is arranged on the base through the guiding portion, and is used to guide and position the tibial plateau;

[0010] The tibial plateau positioning portion is provided with a horizontal osteotomy groove and a vertical osteotomy groove, the interiors of the horizontal osteotomy groove and the vertical osteotomy groove are connected, and are used to position the L-shaped osteotomy to prevent excessive osteotomy from causing tibial plateau fractures;

[0011] The tibial plateau positioning portion is provided with a tibial plateau fitting surface, and the base is provided with a tibial anterior fitting surface, which can fit and position with the anterior tibia and the tibial plateau.

[0012] In an optional embodiment, a tibial plateau auxiliary positioning structure is further provided on the tibial plateau positioning portion to assist the tibial plateau fitting surface in positioning the tibia.

[0013] In an optional embodiment, the tibial plateau auxiliary positioning structure includes a horizontal bracket and a positioning column;

[0014] The horizontal bracket is arranged at two opposite sides of the tibial plateau positioning portion, and the positioning column is arranged at one end of the horizontal bracket away from the tibial plateau positioning portion;

[0015] The end of the positioning column is provided with a tibial plateau auxiliary fitting surface.

[0016] In an optional embodiment, a tibial crest guide block is further provided on the guide portion for guiding the positioning of the tibial crest.

[0017] In an optional embodiment, a positioning groove is provided on the tibial crest guide block.

[0018] In an optional embodiment, a plurality of through guide plate fixing holes are provided on the base, and one end of the guide plate fixing hole is provided on the anterior tibia fitting surface.

[0019] In an optional embodiment, numbers are provided around the other end of the guide plate fixing hole to indicate the usage order of the guide plate fixing holes.

[0020] In an optional embodiment, a guide plate pressing area is also provided on the base for pressing the guide plate.

[0021] In an optional embodiment, an anti-slip structure is provided on the pressing area of ​​the guide plate.

[0022] In an optional embodiment, a guide plate identification area is provided on the base for marking and distinguishing guide plates of different models.

[0023] The beneficial effects of the embodiments of the utility model are:

[0024] By setting the anterior tibial fitting surface and the tibial plateau fitting surface, the tibial osteotomy can be positioned at the same time, ensuring the accuracy of guide plate placement, improving surgical results, and ensuring the service life of the prosthesis. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, 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 utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0026] Figure 1 A front view of the anti-turnover tibial osteotomy guide provided by an embodiment of the utility model;

[0027] Figure 2 A schematic diagram of the three-dimensional structure of the anti-turnover tibial osteotomy guide plate provided in an embodiment of the utility model;

[0028] Figure 3 A schematic diagram of the three-dimensional structure of the anti-turnover tibial osteotomy guide plate provided by an embodiment of the utility model from another perspective;

[0029] Figure 4 A reference diagram of the use state of the anti-turnover tibial osteotomy guide provided in the embodiment of the utility model;

[0030] Figure 5 A reference diagram of the use status of the anti-turnover tibial osteotomy guide plate provided in an embodiment of the utility model from another perspective.

[0031] Icons: 1-base; 2-guide part; 3-tibial plateau positioning part; 4-vertical osteotomy groove; 5-horizontal osteotomy groove; 6-horizontal bracket; 7-positioning column; 8-guide plate fixing hole; 9-guide plate pressing area; 10-tibial crest guide block; 11-anterior tibial fitting surface; 12-guide plate identification area; 13-positioning groove; 14-tibial plateau fitting surface; 15-tibial plateau auxiliary fitting surface; 16-tibial osteotomy; 17-number. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0033] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0035] In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, or the orientation or position relationship in which the utility model product is usually placed when in use, which is only for the convenience of describing the utility model 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 the present utility model. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0036] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components are required to be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0037] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" 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 the present invention can be understood according to specific circumstances.

[0038] The following is combined with Figure 1 To Attachment Figure 5 , some embodiments of the present utility model are described in detail. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0039] The utility model provides an anti-turnover tibial osteotomy guide plate, such as Figures 1 to 3 As shown, it includes a base 1, a guide part 2 and a tibial plateau positioning part 3; the tibial plateau positioning part 3 is arranged on the base 1 through the guide part 2, and is used for guiding and positioning the tibial plateau; the tibial plateau positioning part 3 is provided with a horizontal osteotomy groove 5 and a vertical osteotomy groove 4, and the horizontal osteotomy groove and the vertical osteotomy groove 4 are internally connected, and are used for positioning the L-shaped osteotomy to prevent excessive osteotomy from causing tibial plateau fracture; the tibial plateau positioning part 3 is provided with a tibial plateau fitting surface 14, and the base 1 is provided with an anterior tibial fitting surface 11, which can be fitted and positioned with the anterior tibia and the tibial plateau.

[0040] Specifically, in the present embodiment, an anterior tibial fitting surface 11 is provided on the base 1, and a tibial plateau fitting surface 14 is provided on the tibial plateau positioning portion 3, and the surfaces of two different positions of the tibial osteotomy 16 are fitted by the anterior tibial fitting surface 11 and the tibial plateau fitting surface 14, thereby improving the accuracy and stability of positioning.

[0041] More specifically, in this embodiment, a horizontal osteotomy groove 5 and a vertical osteotomy groove 4 are provided on the tibial plateau positioning portion 3, and the horizontal osteotomy groove 5 and the vertical osteotomy groove 4 are connected to each other for positioning the L-shaped osteotomy to prevent excessive osteotomy from causing tibial plateau fracture.

[0042] In an optional embodiment, a tibial plateau auxiliary positioning structure is further provided on the tibial plateau positioning portion 3 to assist the tibial plateau fitting surface in positioning the tibia.

[0043] Specifically, in this embodiment, the auxiliary positioning structure can be used to assist in positioning the tibial plateau positioning portion 3, thereby increasing the positioning area of ​​the tibial plateau positioning portion 3, thereby ensuring the accuracy of the tibial plateau positioning portion 3 in positioning the tibia and improving the stability during positioning.

[0044] In an optional embodiment, the tibial plateau auxiliary positioning structure includes a horizontal bracket 6 and a positioning column 7; the horizontal bracket 6 is arranged on opposite sides of the tibial plateau positioning portion 3, and the positioning column 7 is arranged at one end of the horizontal bracket 6 away from the tibial plateau positioning portion 3; the end of the positioning column 7 has a tibial plateau auxiliary fitting surface 15.

[0045] Specifically, in the present embodiment, a bracket and a positioning column 7 form a set, which are arranged on one side of the tibial plateau positioning portion 3, and the other set is arranged on the other opposite side, that is, a bracket and a positioning column 7 are arranged on both opposite sides of the tibial plateau positioning portion 3, which not only increases the positioning auxiliary area, but also increases the positioning width, thereby improving the stability and accuracy of positioning.

[0046] More specifically, in this embodiment, one end of the positioning column 7 is disposed on the horizontal support 6, and the other end is in contact with the tibial plateau.

[0047] More specifically, in the present embodiment, the horizontal support 6 and the positioning column 7 are provided as one; the horizontal support 6 and the tibial plateau positioning portion 3 are provided as one piece.

[0048] In an optional embodiment, a tibial crest guide block 10 is further provided on the guide portion 2 for guiding the positioning of the tibial crest.

[0049] In this embodiment, the tibial crest guide block 10 on the guide part 2 can guide the placement position of the tibial guide plate and facilitate the verification of the accuracy of the vertical osteotomy.

[0050] In an optional embodiment, a positioning groove 13 is provided on the tibial crest index block 10 .

[0051] Specifically, in this embodiment, the positioning groove 13 matches the protrusion on the tibial osteotomy 16 , thereby providing a better positioning effect for the tibial osteotomy 16 .

[0052] In an optional embodiment, a plurality of through guide plate fixing holes 8 are provided on the base 1 , and one end of the guide plate fixing hole 8 is provided on the anterior tibia fitting surface 11 .

[0053] In an optional embodiment, numbers 17 are provided around the other end of the guide plate fixing hole 8 to indicate the usage order of the guide plate fixing holes 8 .

[0054] In this embodiment, the number 17 is represented by a number, such as Figure 5 shown.

[0055] When in use, fixing nails are inserted into the guide plate fixing holes 8 in the order of number 17, so that the anti-turnover tibial osteotomy guide plate can be accurately and stably fixed on the bone surface, thereby completing the positioning of the tibial osteotomy 16.

[0056] It should be pointed out that the number 17 can be set as a number, but it is not limited to numbers. It can also be numbered as letters, or as the Heavenly Stems and Earthly Branches, such as Jia, Yi, Bing, Ding, Zi, Chou, Yi, Mao, etc. As long as it is marked with a sign with a certain order of direction, the effect of numbering 17 will be achieved.

[0057] In an optional embodiment, a guide plate pressing area 9 is further provided on the base 1 for pressing the guide plate.

[0058] In this embodiment, pressing the anti-vertiation tibial osteotomy guide plate at the guide plate pressing area 9 can make the positioning of the anti-vertiation tibial osteotomy guide plate more accurate, which is beneficial to the fixation of the anti-vertiation tibial osteotomy guide plate.

[0059] In an optional embodiment, an anti-slip structure is provided on the guide plate pressing area 9 .

[0060] The anti-slip structure can prevent fingers from slipping when pressing, thus ensuring stability during pressing.

[0061] Specifically, in this embodiment, the anti-skid structure may be in the form of anti-skid stripes, or anti-skid grooves, or convex points, concave pits, etc., that is, as long as it can play an anti-skid role.

[0062] In an optional embodiment, a guide plate identification area 12 is provided on the base 1 for marking and distinguishing guide plates of different models.

[0063] By recording the information of the anti-vertebral tibial osteotomy guide plate on the guide plate identification area 12, different types of anti-vertebral tibial osteotomy guide plates can be marked and distinguished, so as to facilitate more accurate matching during use.

[0064] As can be seen from the above, the utility model provides a tibial osteotomy 16 guide plate for unicompartmental knee replacement, including two bone surface fitting areas, namely the anterior tibial fitting surface 11 and the tibial plateau fitting surface 14. Among them, the tibial plateau fitting surface 14 is further divided into two inner and outer auxiliary fitting surfaces, namely the tibial plateau auxiliary fitting surface 15 on the positioning column 7; the tibial plateau positioning part 3 has two osteotomy grooves for guiding osteotomy, namely the horizontal osteotomy groove 5 and the vertical osteotomy groove 4; the base 1 is provided with a guide plate fixing hole 8 for fixing the guide plate, and the guide plate fixing hole 8 is provided with a number 17, which is conducive to the fixing of the guide plate; there are also a guide block for quickly pointing out the position of the guide plate, a guide plate pressing area 9, a guide plate identification area 12, etc.

[0065] The anti-turnover tibial osteotomy guide provided by the utility model can provide personalized customization. Through the guide plate identification information, the applicable object of the guide plate is matched, and the approximate position of the guide plate on the bone surface is quickly found according to the tibial crest guide block. The position of the guide plate is accurately located through the anterior tibial fitting surface 11, the tibial plateau fitting surface, and the auxiliary fitting surface. The position direction of the tibial crest guide block is observed, the accuracy of the guide plate position is checked, and the guide plate pressing area 9 is pressed to make the various fitting surfaces on the osteotomy guide plate fit tightly with the anterior tibia and the tibial plateau. Fixing nails are inserted in sequence respectively, and horizontal osteotomy and vertical osteotomy are completed along the osteotomy groove.

[0066] The beneficial effects of the embodiments of the utility model are:

[0067] By setting the anterior tibial fitting surface 11 and the tibial plateau fitting surface 14, the tibial osteotomy 16 can be positioned at the same time, ensuring the placement accuracy of the guide plate, improving the surgical effect, and ensuring the service life of the prosthesis.

[0068] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. An anti-turnover tibial osteotomy guide, characterized in that: It includes a base, a guide part and a tibial plateau positioning part; The tibial plateau positioning portion is arranged on the base through the guiding portion, and is used to guide and position the tibial plateau; The tibial plateau positioning portion is provided with a horizontal osteotomy groove and a vertical osteotomy groove, the interiors of the horizontal osteotomy groove and the vertical osteotomy groove are connected, and are used to position the L-shaped osteotomy to prevent excessive osteotomy from causing tibial plateau fractures; The tibial plateau positioning portion is provided with a tibial plateau fitting surface, and the base is provided with a tibial anterior fitting surface, which can fit and position with the anterior tibia and the tibial plateau.

2. The anti-turnover tibial osteotomy guide according to claim 1, characterized in that: The tibial plateau positioning portion is also provided with a tibial plateau auxiliary positioning structure for assisting the tibial plateau fitting surface in positioning the tibia.

3. The anti-turnover tibial osteotomy guide according to claim 2, characterized in that: The tibial plateau auxiliary positioning structure includes a horizontal bracket and a positioning column; The horizontal bracket is arranged at two opposite sides of the tibial plateau positioning portion, and the positioning column is arranged at one end of the horizontal bracket away from the tibial plateau positioning portion; The end of the positioning column is provided with a tibial plateau auxiliary fitting surface.

4. The anti-turnover tibial osteotomy guide according to claim 1, characterized in that: The guide part is also provided with a tibial crest guide block for guiding and positioning the tibial crest.

5. The anti-turnover tibial osteotomy guide according to claim 4, characterized in that: The tibial crest index block is provided with a positioning groove.

6. The anti-turnover tibial osteotomy guide according to claim 1, characterized in that: The base is provided with a plurality of through guide plate fixing holes, and one end of the guide plate fixing hole is arranged on the anterior tibia fitting surface.

7. The anti-turnover tibial osteotomy guide according to claim 6, characterized in that: Numbers are arranged around the other end of the guide plate fixing hole to indicate the usage sequence of the guide plate fixing holes.

8. The anti-turnover tibial osteotomy guide according to claim 1, characterized in that: The base is also provided with a guide plate pressing area for pressing the guide plate.

9. The anti-turnover tibial osteotomy guide according to claim 8, characterized in that: An anti-slip structure is arranged on the pressing area of ​​the guide plate.

10. The anti-turnover tibial osteotomy guide according to claim 1, characterized in that: The base is provided with a guide plate identification area for marking and distinguishing guide plates of different models.

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