Osteotomy assembly

Abstract

The utility model relates to an osteotomy assembly, which comprises an osteotomy plate, an osteotomy plate positioning piece and a forming drill positioning piece, the osteotomy plate comprises a plate-shaped main body, and the main body comprises a positioning hole and a plurality of osteotomy grooves; the osteotomy plate positioning piece comprises a first cylinder, a first through hole is formed in the first cylinder, and a first stopping face is arranged on one side of the front face of the first cylinder. The forming drill positioning piece comprises a second barrel, a second through hole is formed in the second barrel, and a second stopping face is arranged on one side of the front face of the second barrel. The osteotomy assembly can improve the accuracy of the osteotomy position.

Description

Technical Field

[0001] The utility model relates to the technical field of medical instruments, in particular to an osteotomy component. Background Art

[0002] Knee replacement surgery is a commonly used surgical procedure for treating conditions such as knee osteoarthritis, traumatic arthritis, and rheumatoid arthritis, with excellent postoperative results. During total knee replacement surgery, the femur requires osteotomy and trimming to accommodate the femoral prosthesis. In existing techniques, anterior-posterior and posterior-anterior oblique osteotomies are typically performed using the distal femoral osteotomy plane as a reference.

[0003] When performing distal femoral osteotomy, it is usually necessary to first drill an opening at the end of the femur, then insert an intramedullary nail into the femoral medullary canal for positioning, then assemble the osteotomy guide, install the osteotomy module in conjunction with it, and finally perform the osteotomy through the opening on the osteotomy module. Due to the irregular shape of the distal femur, and the further irregular shape caused by pathological changes, existing knee joint intramedullary positioning devices are difficult to fully align with the patient's distal femoral condyle. When there is a gap between the knee joint positioning device and the patient's distal femoral condyle, errors are easily generated, affecting the accuracy of prosthesis installation. In addition, the intramedullary nail does not fully fit into the patient's femoral medullary canal, and a certain gap will exist. The intramedullary nail located at one end of the femoral medullary canal is prone to shaking, causing deviations in subsequent osteotomy. Utility Model Content

[0004] The utility model aims to provide an osteotomy component with high osteotomy accuracy.

[0005] In order to achieve the above purpose, the technical solution adopted by the present utility model is as follows:

[0006] An osteotomy assembly, comprising:

[0007] An osteotomy plate, comprising a plate-shaped main body having a front side and a back side arranged opposite to each other, and provided with a positioning hole and a plurality of osteotomy grooves;

[0008] An osteotomy plate positioning member, the osteotomy plate positioning member comprising a first cylinder matched with the positioning hole, the first cylinder being provided with a first through hole penetrating the first cylinder along its axial direction, and a first stop surface protruding in the radial direction being provided on a front side of the first cylinder;

[0009] A forming drill positioning piece includes a second cylinder arranged to match the positioning hole, the second cylinder is provided with a second through hole passing through the second cylinder along the axial direction of the second cylinder, and a second stop surface protruding radially is provided on the front side of the second cylinder.

[0010] In one embodiment, a limiting groove is provided at the edge of the positioning hole, and protrusions matching the limiting groove are provided on the outer peripheral walls of the first cylinder and the second cylinder.

[0011] In one embodiment, an included angle α is formed between the axis of the first through hole and the axis of the first cylinder, and the included angle α is 6°.

[0012] In one embodiment, an included angle β is formed between the axis of the second through hole and the axis of the second cylinder, and the included angle β is 6°.

[0013] In one embodiment, the thickness of the molded drill positioning member is designed so that when the stop surface of the intramedullary drill bit coincides with the second stop surface, the drilling length of the drill bit is the required effective length.

[0014] In one embodiment, a handle mounting hole is respectively provided on the side walls on opposite sides of the main body, and the handle mounting hole is an inclined channel offset toward the front of the main body.

[0015] In one embodiment, two opposite sides of the main body have lugs extending outward, and the lugs are provided with fixing holes penetrating the lugs along the thickness direction.

[0016] In one embodiment, the main body is provided with a first osteotomy groove, which extends along the length direction of the main body and penetrates the main body along the thickness direction of the main body.

[0017] In one embodiment, the main body is provided with a second osteotomy groove, which extends along the length direction of the main body and penetrates the main body obliquely along the thickness direction of the main body, with the oblique direction being inclined from the front side of the main body to the lower side of the back side.

[0018] In one embodiment, the main body is provided with a third osteotomy groove, which extends along the length direction of the main body and is distributed on opposite sides of the positioning hole. The third osteotomy groove passes through the main body at an angle along the thickness direction of the main body, and the inclination direction is inclined from the front side of the main body to the upper direction of the back side.

[0019] The utility model adopts the above technical solution, and has the beneficial effect that the osteotomy assembly provided by the utility model includes an osteotomy plate, an osteotomy plate positioning piece and a forming drill positioning piece. The osteotomy plate positioning hole is determined to be consistent with the actual bone medullary cavity direction according to the medullary reaming drill, and the osteotomy plate is fixed thereby, and the direction of the second through hole of the subsequent forming drill positioning piece is made consistent with the direction of the bone medullary cavity, thereby ensuring that the drilling direction of the forming drill is consistent with the actual bone medullary cavity direction, and ensuring the accuracy of the actual osteotomy position. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A perspective schematic diagram of an osteotomy plate is shown.

[0021] Figure 2 A lateral view of the left side of the osteotomy plate is shown.

[0022] Figure 3 A three-dimensional schematic diagram of an osteotomy plate positioning piece is shown.

[0023] Figure 4 A schematic cross-sectional view of an osteotomy plate positioning member is shown.

[0024] Figure 5 A perspective schematic diagram of a profile drill positioning member is shown.

[0025] Figure 6 A schematic cross-sectional view of a profile drill positioning member is shown. DETAILED DESCRIPTION

[0026] The following will be combined with the accompanying drawings to describe in detail the preferred embodiments of the present invention so that the purpose, features and advantages of the present invention can be more clearly understood. It should be understood that the embodiments shown in the accompanying drawings are not intended to limit the scope of the present invention, but are only intended to illustrate the essential spirit of the technical solution of the present invention.

[0027] In the following description, for the purpose of illustrating the various disclosed embodiments, certain specific details are set forth in order to provide a thorough understanding of the various disclosed embodiments. However, those skilled in the relevant art will recognize that the embodiments may be practiced without one or more of these specific details. In other cases, well-known devices, structures, and techniques associated with this application may not be shown or described in detail to avoid unnecessarily obscuring the description of the embodiments.

[0028] Unless the context requires otherwise, throughout the specification and claims, the word "comprise" and variations such as "include" and "have" should be construed in an open, inclusive sense, that is, should be interpreted to mean "including, but not limited to."

[0029] Reference throughout this specification to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment. Thus, the appearances of "in one embodiment" or "in an embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any manner in one or more embodiments.

[0030] As used in this specification and the appended claims, the singular forms "a," "an," and "the" include plural referents unless the context clearly dictates otherwise. It should be noted that the term "or" is generally employed in its sense including "and / or" unless the context clearly dictates otherwise.

[0031] In the following description, in order to clearly demonstrate the structure and working mode of the present invention, many directional words will be used for description, but words such as "front", "back", "left", "right", "outside", "inside", "outward", "inward", "up", and "down" should be understood as convenient terms and should not be understood as restrictive terms.

[0032] Furthermore, terms such as "horizontal," "vertical," and "overhanging" do not necessarily imply that a component must be absolutely horizontal or overhanging, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but rather that it can be slightly tilted.

[0033] It should also be noted that, in the description of this application, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0034] like Figures 1-6 As shown, this embodiment provides an osteotomy assembly comprising an osteotomy plate and a positioning member. The osteotomy plate 1 comprises a plate-shaped body 10. The body 10 has a generally rectangular shape and has a front and a back surface disposed opposite each other. In this embodiment, the back surface is the side facing the patient during surgery, and the front surface is the side opposite the back surface. The body 10 is provided with osteotomy grooves, the number, length, angle, and other characteristics of which are determined based on actual needs.

[0035] In this embodiment, three osteotomy grooves are provided on the main body 10, which are defined as the first osteotomy groove 11a, the second osteotomy groove 11b and the third osteotomy groove 11c, respectively. The first osteotomy groove 11a is located at the upper part of the main body 10, extends along the length direction of the main body, and penetrates the main body 10 along the thickness direction of the main body 10; the second osteotomy groove 11b is located below the first osteotomy groove 11a, and the second osteotomy groove 11b is inclined to penetrate the main body 10, and its inclination direction is inclined from the front of the main body to the lower direction of the back; the third osteotomy groove 11c is located at the lower part of the main body, and the third osteotomy groove 11c is distributed on the left and right sides of the main body 10, and the third osteotomy groove 11c is inclined to penetrate the main body 10, and its inclination direction is inclined from the front of the main body to the upper direction of the back. The left and right sides of the main body 10 respectively have lugs 101 extending outward, and each lug 101 is provided with a fixing hole 102 that penetrates the respective lugs along the thickness direction. During surgery, the fixing nail can be passed through the corresponding fixing hole 102 to achieve the purpose of preliminary positioning of the main body 10.

[0036] A handle mounting hole 103 is provided on each of the left and right side walls of the main body 10. The handle mounting hole 103 is used to connect a handle to facilitate intraoperative gripping of the osteotomy plate 1. Preferably, the handle mounting hole 103 is an angled channel, offset from the front to the back, so that the handle connected to the handle mounting hole 103 is biased toward the front, facilitating intraoperative gripping.

[0037] A positioning hole 12 is provided in the middle of the main body 10. This hole 12 cooperates with a positioning member to position the intramedullary rod or medullary drill. Specifically, the positioning hole 12 is a circular through-hole located in the middle of the main body 10 and extends through the main body 10 along its thickness. A retaining groove 121 is provided on each side of the positioning hole 12. Retaining grooves 121 extend radially outward from the positioning hole 12 and are used to position the positioning member and prevent rotation.

[0038] The positioning member 2 includes an osteotomy plate positioning member 21 and a forming drill positioning member 22. Figure 3 and Figure 4 The osteotomy plate positioning member 21 includes a first cylinder 211 that is matched with the positioning hole 12 on the main body 10. The first cylinder 211 is provided with a first through hole 212 that passes through the first cylinder 211 along the axial direction of the first cylinder 211. The size of the first through hole 212 matches the outer diameter of the intramedullary rod. The peripheral wall of the first cylinder 211 is provided with a first protrusion 213 that extends radially. The shape of the first protrusion 213 matches the limiting groove 121, so that the first protrusion 213 can be located in the limiting groove 121 to limit the rotation of the osteotomy plate positioning member 21. A first stop surface 214 that protrudes radially is also provided on the front side of the first cylinder 211. The size of the first stop surface 214 is larger than the aperture of the positioning hole 12 to limit the length of the first cylinder 211 extending into the positioning hole 12. Figure 4 There is an included angle α between the axis of the first through hole 212 and the axis of the first cylinder 211. Preferably, the included angle α is 6°, so that the intramedullary rod can be directly inserted into the medullary cavity for positioning.

[0039] The profiled drill positioning member 22 has substantially the same structure as the osteotomy plate positioning member 21, see Figure 5 and Figure 6The molded drill positioning member 22 includes a second barrel 221 that is matched with the positioning hole 12 on the main body 10. The second barrel 221 is provided with a second through hole 222 that passes through the second barrel 221 along its axial direction. The size of the second through hole 222 matches the outer diameter of the intramedullary drill. The peripheral wall of the second barrel 221 is provided with a second protrusion 223 that extends radially. The shape of the second protrusion 223 matches the limiting groove 121, so that the second protrusion 223 can be located in the limiting groove 121 to limit the rotation of the molded drill positioning member 22. The front side of the second barrel 221 is also provided with a second stop surface 224 that protrudes radially. The size of the second stop surface 224 is larger than the diameter of the positioning hole 12 to limit the length of the second barrel 221 extending into the positioning hole 12. Figure 6 There is an angle β between the axis of the second through hole 222 and the axis of the second cylinder 221. Preferably, the angle β is 6°, so that the medullary cavity drill can directly drill into the medullary cavity.

[0040] In another embodiment, the thickness of the molded drill positioning member 22 is determined according to the required drilling depth. When the stop surface of the intramedullary drill bit coincides with the second stop surface 224, the drill bit drills into the required effective length without the problem of being too deep or too shallow.

[0041] The osteotomy assembly provided in this embodiment is used during surgery as follows:

[0042] (1) When positioning the osteotomy plate 1, the reamer is first inserted into the medullary cavity, and then the osteotomy plate 1 is inserted into the rod of the reamer along the reamer. However, since the diameters and angles are inconsistent, the osteotomy plate positioning member 21 is inserted at this time to position the osteotomy plate 1. Since the rod of the reamer is in the actual direction of the bone medullary cavity, the osteotomy plate positioning member 21 can ensure that the positioning hole 12 in the osteotomy plate 1 is in the actual direction of the bone medullary cavity. After the osteotomy plate 1 is positioned, the osteotomy plate 1 is firmly fixed by the fixing pin.

[0043] (2) Remove the medullary reamer and the osteotomy plate positioning member 21, and place the forming drill positioning member 22 in the positioning hole 12. Since the positioning hole 12 is in the actual direction of the bone medullary cavity, the direction in which the forming drill drills into the second through hole 222 of the forming drill positioning member 22 is also the actual direction of the bone medullary cavity, ensuring that the drilling direction of the forming drill is consistent with the actual direction of the bone medullary cavity.

[0044] (3) Remove the forming drill positioning member 22 and the forming drill, and finally resect the distal femur of the patient along the osteotomy groove on the osteotomy plate 1.

[0045] The osteotomy assembly provided in this embodiment first determines that the positioning hole is consistent with the actual direction of the bone medullary cavity based on the medullary drill, and uses this to fix the osteotomy plate, and makes the direction of the second through hole of the subsequent forming drill positioning piece the same as the direction of the bone medullary cavity, ensuring that the drilling direction of the forming drill is consistent with the actual direction of the bone medullary cavity, thereby ensuring the accuracy of the actual osteotomy position.

[0046] While the preferred embodiments of the present invention have been described in detail above, it should be understood that, after reading the above teachings of the present invention, those skilled in the art may make various changes or modifications to the present invention. Such equivalents also fall within the scope of the claims appended hereto.

Claims

1. An osteotomy assembly, characterized in that: include: An osteotomy plate, comprising a plate-shaped main body having a front side and a back side arranged opposite to each other, and provided with a positioning hole and a plurality of osteotomy grooves; An osteotomy plate positioning member, the osteotomy plate positioning member comprising a first cylinder matched with the positioning hole, the first cylinder being provided with a first through hole penetrating the first cylinder along its axial direction, and a first stop surface protruding in the radial direction being provided on a front side of the first cylinder; A forming drill positioning piece includes a second cylinder arranged to match the positioning hole, the second cylinder is provided with a second through hole passing through the second cylinder along the axial direction of the second cylinder, and a second stop surface protruding radially is provided on the front side of the second cylinder.

2. The osteotomy assembly according to claim 1, wherein A limiting groove is provided on the edge of the positioning hole, and protrusions matching the limiting groove are provided on the outer peripheral walls of the first cylinder and the second cylinder.

3. The osteotomy assembly according to claim 1, wherein: An included angle α is formed between the axis of the first through hole and the axis of the first cylinder, and the included angle α is 6°.

4. The osteotomy assembly according to claim 1, wherein: An included angle β is formed between the axis of the second through hole and the axis of the second cylinder, and the included angle β is 6°.

5. The osteotomy assembly according to claim 1, wherein: The thickness of the molded drill positioning piece is designed so that when the stop surface of the intramedullary drill bit coincides with the second stop surface, the drilled length of the drill bit is the required effective length.

6. The osteotomy assembly according to claim 1, wherein: A handle mounting hole is respectively provided on the side walls on the opposite sides of the main body, and the handle mounting hole is an inclined channel offset toward the front of the main body.

7. The osteotomy assembly according to claim 1, wherein: Two opposite sides of the main body are provided with lugs extending outwards, and the lugs are provided with fixing holes penetrating the lugs along the thickness direction.

8. The osteotomy assembly according to claim 1, wherein: The main body is provided with a first osteotomy groove, which extends along the length direction of the main body and penetrates the main body along the thickness direction of the main body.

9. The osteotomy assembly according to claim 1, wherein: The main body is provided with a second osteotomy groove, which extends along the length direction of the main body and penetrates the main body obliquely along the thickness direction of the main body, with the oblique direction being inclined from the front side of the main body to the lower side of the back side.

10. The osteotomy assembly according to claim 1, wherein: The main body is provided with a third osteotomy groove, which extends along the length direction of the main body and is distributed on opposite sides of the positioning hole. The third osteotomy groove passes through the main body at an angle along the thickness direction of the main body, and the inclination direction is inclined from the front side of the main body to the upper direction of the back side.

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