Multi-faceted osteotomy plate

Abstract

The present invention discloses a multi-faceted osteotomy plate, comprising an osteotomy plate main body, a positioning pin integrally connected to the rear surface of the osteotomy plate main body, and an upper positioning plate and a lower positioning plate obliquely arranged on the upper surface and the lower surface of the osteotomy plate main body respectively; the osteotomy plate main body is provided with a crossed front bevel osteotomy groove and a rear bevel osteotomy groove; the intersection of the front bevel osteotomy groove and the rear bevel osteotomy groove is close to the middle of the osteotomy plate main body, so that the intersection of the osteotomy groove is surrounded by the osteotomy plate main body on all sides, and the osteotomy plate main body distributed around is relatively uniform, so that the forces exerted on the osteotomy groove by the saw blade during cutting offset each other, effectively reducing the deformation of the front bevel osteotomy groove and the rear bevel osteotomy groove; the positioning pin and the osteotomy plate main body are an integral structure, have a long service life, and are firmly and reliably positioned; the present invention has a simple structure, high strength, and is easy to process, and can effectively improve the accuracy of the front bevel osteotomy and the rear bevel osteotomy.

Description

Technical Field

[0001] The invention belongs to the technical field of medical devices, and in particular relates to a multi-faceted osteotomy plate. Background Art

[0002] In total knee replacement surgery, the distal femur needs to be osteotomized to accommodate the femoral prosthesis to be installed, which requires osteotomy of the anterior and posterior femoral slopes. After repeated use, the multi-faceted osteotomy plate has low strength and the osteotomy groove is easy to deform, which affects the accuracy of the osteotomy surface. Summary of the invention

[0003] In order to solve the above technical problems, the present invention provides a multi-faceted osteotomy plate, which can accurately perform osteotomy and effectively ensure the stability of prosthesis installation.

[0004] A multi-faceted osteotomy plate comprises an osteotomy plate body, a positioning pin integrally connected to the rear surface of the osteotomy plate body, and an upper limit plate and a lower limit plate obliquely arranged on the upper surface and the lower surface of the osteotomy plate body, respectively. The osteotomy plate body is provided with a crossed front bevel osteotomy groove and a rear bevel osteotomy groove, and the intersection of the front bevel osteotomy groove and the rear bevel osteotomy groove is close to the middle of the osteotomy plate body.

[0005] Preferably, the front surface and the rear surface of the osteotomy plate body are vertical surfaces, and the angles between the front bevel osteotomy groove and the rear bevel osteotomy groove and the rear surface are both 45°.

[0006] Preferably, the upper surface of the osteotomy plate body is provided with an upper groove, the angle between the groove bottom of the upper groove and the front surface is 92°-96°, and the upper mounting hole is provided on the upper groove perpendicular to the groove bottom.

[0007] Preferably, in the above technical solution, an upper limit pin is welded in the upper mounting hole, and the upper part of the upper limit pin extends out of the upper groove and is welded to the upper limit plate.

[0008] Preferably, the lower surface of the osteotomy plate body is provided with a lower groove, the angle between the bottom of the lower groove and the front surface is 86°-91°, and a lower mounting hole is provided on the lower groove perpendicular to the bottom of the groove.

[0009] Preferably, in the above technical solution, a lower limiting pin is welded in the lower mounting hole, and the lower portion of the lower limiting pin extends out of the lower groove and is welded to the lower limiting plate.

[0010] Preferably, in the above technical solution, the horizontal direction of the intersection of the front bevel osteotomy groove and the rear bevel osteotomy groove corresponds to the axis of the positioning pin.

[0011] Preferably, the width of the anterior bevel osteotomy groove is 1.2-1.5 mm.

[0012] Preferably, the width of the posterior bevel osteotomy groove is 1.2-1.5 mm.

[0013] The advantages and positive effects of the present invention are as follows: the present invention provides a multi-faceted osteotomy plate, in which the positioning pin and the osteotomy plate body are an integral structure, have a long service life, and are firmly and reliably positioned; the intersection of the front bevel osteotomy groove and the rear bevel osteotomy groove is close to the middle of the osteotomy plate body, so that the intersection of the osteotomy grooves is surrounded by the osteotomy plate body on all sides, and the osteotomy plate body distributed around is relatively uniform, so that the forces exerted on the osteotomy grooves during cutting by the saw blade offset each other, effectively reducing the deformation of the front bevel osteotomy groove and the rear bevel osteotomy groove; the present invention has a simple structure, high strength, and is easy to process, and can effectively improve the accuracy of the front bevel osteotomy and the rear bevel osteotomy. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a top view of a multi-faceted osteotomy plate provided by an embodiment of the present invention;

[0015] Figure 2 It is a left side view of a multi-faceted osteotomy plate provided by one embodiment of the present invention;

[0016] Figure 3 yes Figure 1 AA section view.

[0017] Among them: 1. osteotomy plate body; 2. positioning pin; 31. upper limit plate; 32. lower limit plate; 4. front bevel osteotomy groove; 5. rear bevel osteotomy groove; 6. upper groove; 71. upper limit nail; 72. lower limit nail; 8. lower groove. DETAILED DESCRIPTION

[0018] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0019] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention 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 invention. In addition, the terms "first", "second", and the like are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", and the like may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0020] In the description of the present invention, 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 the present invention can be understood by specific circumstances.

[0021] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0022] In order to install the femoral prosthesis during total knee replacement, it is necessary to perform anterior and posterior femoral osteotomies. After repeated use, the multi-faceted osteotomy plate has the problem of low strength and easy deformation of the osteotomy groove. This embodiment proposes a multi-faceted osteotomy plate, such as Figure 1-3 As shown, it includes an osteotomy plate body 1, a positioning pin 2 integrally connected to the rear surface of the osteotomy plate body 1, and an upper limit plate 31 and a lower limit plate 32 obliquely arranged on the upper surface and the lower surface of the osteotomy plate body 1, respectively. The osteotomy plate body 1 and the positioning pin 2 can be welded to form an integral structure or the two can be integrally formed. The osteotomy plate body 1 is provided with a crossed front bevel osteotomy groove 4 and a rear bevel osteotomy groove 5, and the intersection of the front bevel osteotomy groove 4 and the rear bevel osteotomy groove 5 is close to the middle of the osteotomy plate body 1. The front bevel osteotomy groove is used to perform osteotomy on the anterior bevel of the femur, and the rear bevel osteotomy groove is used to perform osteotomy on the posterior bevel of the femur. The front bevel osteotomy groove 4 and the rear bevel osteotomy groove 5 both pass through the front surface and the rear surface of the osteotomy plate body. The anterior bevel osteotomy groove 4 and the posterior bevel osteotomy groove 5 can be two groups, which are symmetrically arranged on the front surface and pass through to the rear surface; or they can be one group, the anterior bevel osteotomy groove 4 and the posterior bevel osteotomy groove 5 are a certain distance away from the left surface and the right surface, and pass through to the rear surface.

[0023] In this embodiment, the positioning pin 2 and the osteotomy plate body 1 are an integral structure with a long service life and firm and reliable positioning; the intersection of the front bevel osteotomy groove 4 and the rear bevel osteotomy groove 5 is close to the middle of the osteotomy plate body 1, so that the intersection of the osteotomy grooves is surrounded by the osteotomy plate body 1 on all sides, and the osteotomy plate body 1 distributed around is relatively uniform, so that the forces exerted on the osteotomy grooves during cutting by the saw blade offset each other, effectively reducing the deformation of the front bevel osteotomy groove 4 and the rear bevel osteotomy groove 5; this embodiment has a simple structure, high strength, and is easy to process, and can effectively improve the accuracy of the front bevel osteotomy and the rear bevel osteotomy.

[0024] The front and rear surfaces of the osteotomy plate body 1 are vertical surfaces, and the angles between the front bevel osteotomy groove 4 and the rear bevel osteotomy groove 5 and the rear surface are both 45°. The front bevel osteotomy groove 4 and the rear bevel osteotomy groove 5 can be processed by a wire-cutting machine, which not only ensures the processing size but also meets the higher clinical use requirements. The upper surface of the osteotomy plate body 1 is provided with an upper groove 6, and the angle between the bottom of the upper groove 6 and the front surface is 92°-96°, 96° in this embodiment, and an upper mounting hole is provided on the upper groove 6 perpendicular to the bottom of the groove. An upper limit pin 71 is welded in the upper mounting hole, and the upper part of the upper limit pin 71 extends out of the upper groove 6 and is welded to the upper limit plate 31. The lower surface of the osteotomy plate body 1 is provided with a lower groove 8, and the angle between the bottom of the lower groove 8 and the front surface is 86°-91°, 91° in this embodiment, and a lower mounting hole is provided on the lower groove 8 perpendicular to the bottom of the groove. A lower limit pin 72 is welded in the lower mounting hole, and the lower limit pin 72 extends out of the lower groove 8 and is welded to the lower limit plate 32. In this embodiment, welding is laser welding. For example, the top of the upper limit pin 71 in the upper groove 6 is laser welded to the upper end surface of the upper limit plate, and the lower end of the lower limit pin 72 in the lower groove 8 is laser welded to the lower end surface of the lower limit plate. The upper limit plate 31, the lower limit plate 32, the upper limit pin 71, the lower limit pin 72 and the osteotomy plate body 1 are connected by laser welding, so that the connection is firm and reliable, ensuring the strength requirements during clinical osteotomy. The angle value in this embodiment can be adaptively adjusted according to actual use.

[0025] The horizontal direction of the intersection of the front bevel osteotomy groove 4 and the rear bevel osteotomy groove 5 corresponds to the axis of the positioning pin 2. The width of the front bevel osteotomy groove 4 is 1.2-1.5mm. The width of the rear bevel osteotomy groove 5 is 1.2-1.5mm. In this embodiment, the width of the front bevel osteotomy groove 4 is 1.34±0.02mm. The width of the rear bevel osteotomy groove 5 is 1.34±0.02mm. The groove widths of the front bevel osteotomy groove 4 and the rear bevel osteotomy groove 5 can be adaptively adjusted according to the thickness of the osteotomy saw blade.

[0026] The working process of this embodiment is as follows: the positioning pin 2 is fixed on the cut distal femoral osteotomy surface, and the osteotomy saw blade is inserted into the posterior bevel osteotomy groove 5 and the anterior bevel osteotomy groove 4 in sequence to perform the osteotomy operation. During the osteotomy process, the osteotomy plate body 1 is evenly distributed around the two osteotomy grooves, effectively reducing the deformation of the anterior bevel osteotomy groove 4 and the posterior bevel osteotomy groove 5.

[0027] The above is a detailed description of an embodiment of the present invention, but the content is only a preferred embodiment of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. A multi-faceted osteotomy plate, characterized in that: It comprises an osteotomy plate body, a positioning pin integrally connected to the rear surface of the osteotomy plate body, and an upper limit plate and a lower limit plate obliquely arranged on the upper surface and the lower surface of the osteotomy plate body, respectively. The osteotomy plate body is provided with a crossed front bevel osteotomy groove and a rear bevel osteotomy groove, and the intersection of the front bevel osteotomy groove and the rear bevel osteotomy groove is close to the middle of the osteotomy plate body; The intersection of the front bevel osteotomy groove and the rear bevel osteotomy groove is surrounded by the osteotomy plate body, and the osteotomy plate bodies are evenly distributed around; The front surface of the osteotomy plate body is a vertical surface, the upper surface of the osteotomy plate body is provided with an upper groove, the angle between the groove bottom of the upper groove and the front surface is 92°-96°, and the upper groove is provided with an upper mounting hole perpendicular to the groove bottom; An upper limit pin is welded in the upper mounting hole, and the upper part of the upper limit pin extends out of the upper groove and is welded to the upper limit plate; A lower groove is provided on the lower surface of the osteotomy plate body, the angle between the groove bottom of the lower groove and the front surface is 86°-91°, and a lower mounting hole is provided on the lower groove perpendicular to the groove bottom; A lower limiting nail is welded in the lower mounting hole, and the lower portion of the lower limiting nail extends out of the lower groove and is welded to the lower limiting plate.

2. The multi-faceted osteotomy plate according to claim 1, characterized in that: The rear surface of the osteotomy plate body is a vertical surface, and the angles between the front bevel osteotomy groove and the rear bevel osteotomy groove and the rear surface are both 45°.

3. The multi-faceted osteotomy plate according to claim 1, characterized in that: The horizontal direction of the intersection of the front bevel osteotomy groove and the rear bevel osteotomy groove corresponds to the axis of the positioning pin.

4. The multi-faceted osteotomy plate according to claim 1, characterized in that: The width of the anterior bevel osteotomy groove is 1.2-1.5 mm.

5. The multi-faceted osteotomy plate according to claim 1, characterized in that: The width of the posterior bevel osteotomy groove is 1.2-1.5 mm.

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