osteotome

Abstract

The utility model provides a kind of bending bone knife, bending bone knife is used to cooperate the bone cutting around the acetabulum of navigation identification, bending bone knife includes: blade, blade includes cutting edge and support column, cutting edge is arranged at the end of support column;Reference frame, reference frame is detachably installed at the end of support column away from cutting edge;Navigation identification piece, navigation identification piece is detachably installed on reference frame;The bending bone knife is not integrally formed, but is by several detachable components, that is, the component of bending bone knife can be individually processed, which greatly reduces the processing difficulty of bending bone knife;In addition, when these detachable components are damaged, they can be individually repaired or replaced, without the need to repair or replace the entire bending bone knife, which greatly reduces the cost.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to a curved bone knife. Background Technology

[0002] Periacetabular osteotomy is performed for patients with hip dysplasia. For these young patients with mild lesions, early detection and timely treatment can change the orientation of the acetabulum, effectively increasing the acetabulum's containment and coverage of the femoral head. During the operation, osteotomies are performed along the ischium, pubis, ilium, and posterior column, and the position of the acetabulum is adjusted. A curved osteotome is used for the ischium and posterior column.

[0003] Traditional periacetabular osteotomy largely relies on the surgeon's individual experience. However, periacetabular osteotomy involves a small incision, complex internal muscle groups and tissues, especially the posterior column, which is not within the surgeon's field of vision and is close to important tissues such as the sciatic nerve and artery, thus posing a high surgical risk. In addition, existing osteotomy blades are basically molded as a single piece, which is not detachable, making them difficult to manufacture. Moreover, if one part of the osteotomy blade is damaged, the entire blade needs to be replaced, resulting in high operating costs. In short, traditional osteotomy blades use a one-piece design, which is complex to manufacture and has high maintenance costs. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the defects of existing curved bone knives, which are integrally formed, non-disassembly, complex to process, and have high maintenance costs, and to provide a curved bone knife.

[0005] The present invention solves the above-mentioned technical problems through the following technical solution:

[0006] A curved osteotome for use in navigation-guided periacetabular osteotomy, the curved osteotome comprising:

[0007] The cutting edge consists of a cutting edge and a support post, with the cutting edge located at one end of the support post.

[0008] A reference holder is detachably mounted on the end of the support column away from the cutting edge.

[0009] Navigation identification component, which is detachably mounted on the reference frame.

[0010] In this design, the aforementioned cutting edge is used for bone cutting, the reference frame is detachably mounted on the support column, and the navigation identification component is detachably mounted on the reference frame. This arrangement means that the bending cutter is not a single piece but is composed of several detachable components. In other words, the components of the bending cutter can be machined individually, which greatly reduces the machining difficulty of the bending cutter. In addition, when these detachable components are damaged, they can be repaired or replaced individually without repairing or replacing the entire bending cutter, which greatly reduces costs. The support column is connected to the cutting edge and the reference frame respectively, which can limit the positional relationship between the navigation identification component and the cutting edge, which helps to ensure the cutting accuracy of the cutting edge.

[0011] Preferably, the reference frame includes a frame body and a mounting base connected together. The navigation identification element is detachably mounted on the frame body, and the mounting base is detachably mounted on the support column and sleeved on the support column.

[0012] A limiting part is provided on the support column, which is located between the cutting edge and the mounting base to restrict the movement of the mounting base toward the cutting edge.

[0013] In this design, the navigation identification component is detachably mounted on the frame body, and the mounting base is detachably mounted on the support column. This arrangement further improves the detachability of the bending cutter and reduces its machining difficulty. Furthermore, the mounting base is fitted onto the support column, increasing the connection area between the reference frame and the support column, thus strengthening their connection and preventing the reference frame from easily detaching. The limiting part ensures the stability of the mounting base, which in turn ensures the stability of the reference frame. This prevents the reference frame and navigation identification component from moving arbitrarily, thus affecting the accuracy of the navigation identification bending cutter's position.

[0014] Preferably, the mounting base has a hollow frustum structure, the small circular end face of the mounting base matches the support column, and the small circular end face of the mounting base abuts against the end of the limiting part away from the cutting edge;

[0015] And / or, the inner peripheral wall of the mounting base has a first keyway in the axial direction, and the outer peripheral wall of the support column has a second keyway in the axial direction, the first keyway and the second keyway are adapted to each other, and the second keyway is coplanar with the cutting edge.

[0016] In this design, the hollow frustum structure of the mounting base facilitates matching with the support column and reduces the weight of the osteotome, making it lighter and easier to operate. The inner peripheral wall of the mounting base has a first keyway along the axial direction, and the outer peripheral wall of the support column has a second keyway along the axial direction. This arrangement maximizes the area of ​​the first and second keyways and enhances the connection strength between the mounting base and the support column. The second keyway is coplanar with the cutting edge, which helps prevent the cutting edge from rotating arbitrarily in the circumferential direction and affecting the surgery. In addition, it facilitates positioning the cutting edge and the reference frame according to requirements.

[0017] Preferably, the frame body further includes a first mounting post and a second mounting post connected end to end, the navigation identification component is disposed on the second mounting post, one end of the first mounting post has a first connecting portion, and the outer peripheral wall of the mounting base is provided with a second connecting portion, the first connecting portion and the second connecting portion being detachably connected; and / or,

[0018] The other end of the first mounting post is connected to the second mounting post at an angle δ. The first mounting post is set at an angle γ to the radial direction of the mounting base, and the first keyway is set at an angle β to the axial direction of the first mounting post. The value of δ ranges from 90° to 110°, the value of γ ranges from 140° to 160°, and the value of β ranges from 135° to 155°. The value ranges of δ, γ, and β are configured as multiple preset positions of the reference frame for navigation identification.

[0019] In this scheme, the range of values ​​for δ, γ, and β can be used to assist in the surgical grinding of the patient's curved bone, to enable navigation to identify the position of the reference frame, and to assist in the surgical procedure.

[0020] Preferably, the navigation identification component is T-shaped, with three reference points set at its three ends. The relative distances between the three reference points are a first distance, a second distance, and a third distance, respectively, and the values ​​of the first distance, the second distance, and the third distance follow the design principles of the NDI navigation head.

[0021] In this design, the navigation identification component is T-shaped, which ensures that the force on the left and right sides of the navigation identification component is balanced. In other words, the reference frame is evenly subjected to the force of the navigation identification component, making it relatively stable. In addition, the T-shaped shape of the navigation identification component also makes it easier to set three reference points according to the navigation identification requirements.

[0022] Preferably, the navigation identification component also includes an additional reference point, and the distance from one of the three reference points to the additional reference point is a fourth distance, the value of which follows the design principles of the NDI navigation head;

[0023] The navigation identification component also includes at least two first mounting holes, and at least two second mounting holes are correspondingly provided on the reference frame. The navigation identification component is mounted on the reference frame through the first mounting holes and the second mounting holes, wherein one of the at least two first mounting holes is an additional reference.

[0024] In this design, the additional reference points facilitate the positioning of the three reference points; furthermore, the first and second mounting holes facilitate the stable installation of the navigation identification components on the reference frame.

[0025] Preferably, the curved bone knife also includes a handle, which is sleeved on the end of the support column away from the cutting edge. The starting end of the handle is conical and is embedded in the large circular end face of the mounting base.

[0026] In this design, the handle is conveniently positioned for operation of the bending knife. The handle is fitted onto the end of the support column furthest from the cutting edge, increasing the connection area between the handle and the support column, thus ensuring a stable connection. Furthermore, the handle's starting end is conical and embedded in the large circular end face of the mounting base. This conical starting end of the handle matches the hollow frustum-shaped mounting base, facilitating a smooth transition of the bending knife from the handle to the support column while maintaining its stability. Additionally, the handle is located inside the mounting base, and the support column is located inside the handle. This arrangement strengthens the fixation of the handle to the support column by the mounting base, enhancing the overall strength of the bending knife.

[0027] Preferably, the outer peripheral wall of the handle is cut into a groove along the axial direction, and a third mounting hole is provided in the groove; a fourth mounting hole is provided on the outer peripheral wall of the end of the support column, and the third mounting hole and the fourth mounting hole are compatible.

[0028] In this design, the groove increases grip friction for the striking curved bone knife, and the third and fourth mounting holes ensure a stable connection between the handle and the support post.

[0029] Preferably, the curved bone knife further includes a striking handle, which is inserted into and fixed to the end of the handle, and the end face of the striking handle away from the cutting edge is provided with a curved surface that can be rotated and stretched along the axis; and / or,

[0030] The groove is also provided with a fifth mounting hole, and the outer peripheral wall of the striking handle is provided with a sixth mounting hole, and the fifth mounting hole and the sixth mounting hole are compatible.

[0031] In this design, the striking handle is used to strike the curved bone knife, and the curved surface of the striking handle is beneficial for striking the curved bone knife; in addition, the third and fourth mounting holes facilitate a stable connection between the handle and the striking handle.

[0032] Preferably, the cutting edge is rectangular, with the end of the cutting edge furthest from the support column being the cutting edge, and the end closest to the support column being bent at a preset angle and connected to the support column, and the preset angle is in the range of 140° to 165°.

[0033] In this design, the preset angle range of 140° to 165° is beneficial for transmitting the force during osteotomy with a curved osteotome.

[0034] The positive and progressive effects of this utility model are as follows: the curved bone knife of this application is not integrally formed, but is composed of several detachable components. That is to say, the components of the curved bone knife can be processed individually, which greatly reduces the processing difficulty of the curved bone knife; in addition, when these detachable components are damaged, they can be repaired or replaced individually without repairing or replacing the entire curved bone knife, which greatly reduces costs. Attached Figure Description

[0035] Figure 1 This is an isometric view of a curved bone knife with a reference frame according to this utility model.

[0036] Figure 2 and Figure 3 This is a structural schematic diagram illustrating the overall precision of a curved bone cutter according to an embodiment of the present invention.

[0037] Figure 4 This is an isometric view of the blade according to an embodiment of the present invention.

[0038] Figure 5 This is a schematic diagram of the transverse cross-sectional structure of a blade according to an embodiment of the present invention.

[0039] Figure 6 This is an isometric view of a reference frame and navigation identification component according to an embodiment of the present invention.

[0040] Figure 7 This is a front view of a reference frame with a navigation identification element according to an embodiment of the present invention.

[0041] Figure 8 This is a right view of a reference frame with a navigation identification element according to an embodiment of the present invention.

[0042] Figure 9 This is an isometric view of the frame body according to an embodiment of the present invention.

[0043] Figure 10 This is an isometric view of a mounting base according to an embodiment of the present invention.

[0044] Figure 11 This is a front view of a navigation identification component according to an embodiment of the present invention.

[0045] Figure 12 This is an isometric view of a handle according to an embodiment of the present invention.

[0046] Figure 13 This is an isometric view of a striking handle according to an embodiment of the present invention.

[0047] Explanation of reference numerals in the attached figures:

[0048] Scimitar 100

[0049] Blade 1

[0050] Cutting edge 11

[0051] Blade 111

[0052] Support column 12

[0053] Limiting part 121

[0054] Second key slot 122

[0055] Fourth mounting hole 123

[0056] Reference Frame 2

[0057] Frame body 21

[0058] First mounting post 211

[0059] Second mounting post 212

[0060] First connecting part 213

[0061] Mounting base 22

[0062] Small round end face 221

[0063] Large round end face 222

[0064] First key slot 223

[0065] Second connecting part 224

[0066] Second mounting hole 23

[0067] Navigation identification component 3

[0068] Reference point 31

[0069] First mounting hole 32

[0070] Handle 4

[0071] Groove 41

[0072] Third mounting hole 42

[0073] Fifth mounting hole 43

[0074] 5-knock handle

[0075] Sixth mounting hole 51 Detailed Implementation

[0076] The present invention will be further described below with reference to the accompanying drawings and by way of embodiments, but the present invention is not limited to the scope of the embodiments thereon.

[0077] like Figure 1-13 As shown, this embodiment provides a curved bone cutter 100, which is used for periacetabular osteotomy in conjunction with navigation recognition. The curved bone cutter 100 includes: a blade 1, which includes a cutting edge 11 and a support column 12, with the cutting edge 11 disposed at one end of the support column 12; a reference frame 2, which is detachably mounted on the end of the support column 12 away from the cutting edge 11; and a navigation recognition component 3, which is detachably mounted on the reference frame 2.

[0078] In this embodiment, the cutting edge 11 is used for bone cutting, the reference frame 2 is detachably mounted on the support column 12, and the navigation identification component 3 is detachably mounted on the reference frame 2. This arrangement means that the bending knife 100 is not integrally formed, but is composed of several detachable components. That is to say, the components of the bending knife 100 can be processed individually, which greatly reduces the processing difficulty of the bending knife 100. In addition, when these detachable components are damaged, they can be repaired or replaced individually without repairing or replacing the entire bending knife 100, which greatly reduces costs. The support column 12 is connected to the cutting edge 1 and the reference frame 2 respectively, which can limit the positional relationship between the navigation identification component 3 and the cutting edge 11, which helps to ensure the cutting accuracy of the cutting edge 11.

[0079] It should be noted that the navigation identification component 3 and the blade 1 have a fixed positional relationship. When the position of the navigation identification component 3 is identified, it is equivalent to the position of the blade 1 being identified. This helps the doctor to know the position and angle of the curved bone knife 100 in real time. In addition, the curved bone knife 100 in this embodiment is used in the ischium and posterior column osteotomy stage during periacetabular osteotomy.

[0080] like Figure 1 As shown, the reference frame 2 includes a frame body 21 and a mounting base 22 connected to each other. The navigation identification component 3 is detachably mounted on the frame body 21, and the mounting base 22 is detachably mounted on the support column 12 and sleeved on the support column 12. A limiting part 121 is provided on the support column 12. The limiting part 121 is provided between the cutting edge 11 and the mounting base 22 to restrict the movement of the mounting base 22 toward the cutting edge 11.

[0081] In this embodiment, the navigation identification component 3 is detachably mounted on the frame body 21, and the mounting base 22 is detachably mounted on the support column 12. This arrangement further improves the detachability of the bending knife 100 and reduces the processing difficulty of the bending knife 100. In addition, the mounting base 22 is sleeved on the support column 12, which increases the connection area between the reference frame 2 and the support column 12, thereby strengthening the connection strength between the reference frame 2 and the support column 12, making it less likely for the reference frame 2 to fall off the support column 12. The setting of the limiting part 121 can ensure the stability of the mounting base 22, that is, ensure the stability of the reference frame 2. This can prevent the reference frame 2 and the navigation identification component 3 from moving arbitrarily, so as to affect the accuracy of the navigation identification bending knife 100 position.

[0082] It should be noted that the aforementioned limiting part 121 has a stepped cylindrical structure, and one end of the aforementioned mounting base 22 abuts against one end of the larger diameter cylinder in the stepped cylinder; in addition, the stretching path of the frame body 21 is to first extend vertically upward, then extend at a certain angle along the upper right, and finally extend at a certain angle to the lower right.

[0083] like Figure 5 As shown, the mounting base 22 has a hollow frustum structure. The small circular end face 221 of the mounting base 22 matches the support column 12, and the small circular end face 221 of the mounting base 22 abuts against the end of the limiting part 121 away from the cutting edge 11; and / or, the inner peripheral wall of the mounting base 22 has a first keyway 223 in the axial direction, and the outer peripheral wall of the support column 12 has a second keyway 122 in the axial direction. The first keyway 223 and the second keyway 122 are adapted to each other, and the second keyway 122 is coplanar with the cutting edge 11.

[0084] In this embodiment, the hollow frustum structure of the mounting base 22 facilitates matching with the support column 12 and reduces the weight of the curved bone scalpel 100, making it lighter and easier to operate. The inner peripheral wall of the mounting base 22 has a first keyway 223 along the axial direction, and the outer peripheral wall of the support column 12 has a second keyway 122 along the axial direction. This arrangement maximizes the area of ​​the first keyway 223 and the second keyway 122, while also enhancing the connection strength between the mounting base 22 and the support column 12. The second keyway 122 is coplanar with the cutting edge 11, which helps prevent the cutting edge 11 from rotating arbitrarily in the circumferential direction, thus affecting the surgery. In addition, it also helps to position the cutting edge 11 and the reference frame 2 according to requirements.

[0085] It should be noted that the small circular end face 221 of the mounting base 22 abuts against one end of the larger diameter cylinder in the stepped cylinder, and transitions from the smaller diameter cylinder in the stepped cylinder to the cutting edge 1; in addition, the first keyway 223 extends from the small circular end face 221 of the mounting base 22 to the larger circular end face 222 of the mounting base 22; the distance between the center point of the cutting edge 11 and the center line of the first keyway 223 is a, and the value of a is determined by the product; the small circular end face 221 and the larger circular end face 222 of the mounting base 22 are formed by milling.

[0086] like Figure 9 As shown, the frame body 21 also includes a first mounting post 211 and a second mounting post 212 connected end to end. The navigation identification component 3 is disposed on the second mounting post 212. One end of the first mounting post 211 has a first connecting part 213, and the outer peripheral wall of the mounting base 22 is provided with a second connecting part 224. The first connecting part 213 and the second connecting part 224 are detachably connected. And / or, the other end of the first mounting post 211 and the second mounting post 212 are connected at an angle δ. The first mounting post 211 is set at an angle γ to the radial direction of the mounting base 22, and the first keyway 223 is set at an angle β to the axial direction of the first mounting post 211. Wherein, the value range of δ is 90°~110°, the value range of γ is 140°~160°, and the value range of β is 135°~155°. The above-mentioned value ranges of δ, γ and β are configured as multiple preset positions of the reference frame 2 to be identified by navigation.

[0087] In this embodiment, the range of values ​​for δ, γ, and β can be used to assist in the surgical grinding of the patient's curved bone, to enable navigation to identify the position of the reference frame 2, and to assist in the surgical procedure.

[0088] It should be noted that the first connecting part 213 is a mounting boss, and the second connecting part 224 is a recess on the outer peripheral wall of the mounting base 22. A square hole is provided on the bottom surface of the recess. One end of the first mounting post 211 is adapted to the recess, and the mounting boss is adapted to the square hole. That is to say, the first mounting post 211 and the mounting base 22 are matched with the shaft hole to ensure relative accuracy, and are further fixed by laser welding. The curved bone cutter 100 processed and assembled in the above manner can ensure good accuracy. In addition, the value of β is related to the overall design of the curved bone cutter 100. The design principle is: since the curved bone cutter 100 performs osteotomy at two positions, the ischium and the posterior column, and the ischium and the posterior column are not coplanar, a certain angle is required so that the curved bone cutter 100 can be captured by the NDI navigation head when performing osteotomy at the two positions.

[0089] like Figure 11As shown, the navigation identification component 3 is T-shaped, and three reference points 31 are set at the three ends of the navigation identification component 3. The relative distances between the three reference points 31 are the first distance, the second distance and the third distance, respectively, and the values ​​of the first distance, the second distance and the third distance follow the design principles of the NDI navigation head.

[0090] In this embodiment, the navigation identification component 3 is T-shaped, which makes the force on the left and right sides of the navigation identification component 3 even. That is to say, the reference frame 2 is evenly subjected to the force of the navigation identification component 3, which is relatively stable. In addition, the T-shaped shape of the navigation identification component 3 is also conducive to setting three reference points 31 according to the navigation identification requirements.

[0091] It should be noted that the navigation identification component 3 is mounted on the second mounting post 212 along the vertical direction of the T-shaped plate, so that the navigation identification component 3 is evenly and balancedly mounted on the second mounting post 212 in the lateral direction; in addition, each of the three reference points 31 is equipped with a reflective ball. By capturing the reflective ball on the navigation identification component 3 on the reference frame 2 through the NDI navigation head, the spatial position and coordinate system of the reference frame 2 can be obtained. The positional relationship between the three reference points 31 and the cutting edge 111 is pre-entered by the software. Therefore, the spatial position of the blade 1 under actual conditions can be obtained through coordinate system and position point transformation. Thus, the doctor can understand the osteotomy angle and whether there are important tissues in the osteotomy path in real time during the osteotomy process; the first mounting post 211 and the second mounting post 212 are rectangular strips in shape; the first distance, the second distance and the third distance are in Figure 11 The numbers are labeled c, d, and e respectively.

[0092] like Figure 11 As shown, the navigation identification component 3 also includes an additional reference. The distance from one of the three reference points 31 to the additional reference is the fourth distance. The value of the fourth distance follows the design principle of the NDI navigation head. The navigation identification component 3 also includes at least two first mounting holes 32. At least two second mounting holes 23 are correspondingly provided on the reference frame 2. The navigation identification component 3 is mounted on the reference frame 2 through the first mounting holes 32 and the second mounting holes 23. Among them, one of the at least two first mounting holes 32 is the additional reference.

[0093] In this embodiment, the additional reference is useful for locating the three reference points 31; in addition, the first mounting hole 32 and the second mounting hole 23 are useful for stably mounting the navigation identification element 3 on the reference frame 2.

[0094] It should be noted that multiple additional reference points, first mounting holes 32 and second mounting holes 23 can be provided, and the first mounting holes 32 and second mounting holes 23 can be pin holes; in addition, there are certain accuracy requirements between these three reference points 31 and the additional reference points; the distances from the center point of the cutting edge 11 to the three reference points 31 are f, g and h respectively, and the values ​​of f, g and h are related to the above-mentioned forming angles and distances. These three distance parameters f, g and h are the overall accuracy of the bending tool 100, which can be measured by the corresponding test fixture. The fourth distance is marked as b in the figure.

[0095] like Figure 12 As shown, the curved bone knife 100 also includes a handle 4, which is sleeved on the end of the support column 12 away from the cutting edge 11. The starting end of the handle 4 is a cone, and the starting end of the handle 4 is embedded in the large circular end face 222 of the mounting base 22.

[0096] In this embodiment, the handle 4 facilitates the operation of the bending knife 100. The handle 4 is sleeved on the end of the support column 12 away from the cutting edge 11. This arrangement increases the connection area between the handle 4 and the support column 12, thereby ensuring the stability of the connection between the handle 4 and the support. In addition, the starting end of the handle 4 is conical, and the starting end of the handle 4 is embedded in the large circular end face 222 of the mounting base 22. The conical starting end of the handle 4 matches the hollow frustum-shaped mounting base 22, which helps to ensure the stability of the bending knife 100 while allowing the bending knife 100 to smoothly transition from the handle 4 to the support column 12. Furthermore, the handle 4 is located inside the mounting base 22, and the support column 12 is located inside the handle 4. This arrangement strengthens the fixation of the handle 4 by the mounting base 22 to the support column 12, and also enhances the overall strength of the bending knife 100.

[0097] It should be noted that the starting end of the handle 4 is provided with a first through-hole, and the end of the support column 12 is inserted into and fixed in the first through-hole.

[0098] like Figure 12 As shown, the outer peripheral wall of the handle 4 is cut into a groove 41 along the axial direction, and a third mounting hole 42 is provided on the groove 41; a fourth mounting hole 123 is provided on the outer peripheral wall of the end of the support column 12, and the third mounting hole 42 and the fourth mounting hole 123 are compatible.

[0099] In this embodiment, the groove 41 is designed to increase the grip friction of the striking curved bone knife 100, and the third mounting hole 42 and the fourth mounting hole 123 are designed to facilitate the stable connection between the handle 4 and the support column 12.

[0100] It should be noted that the third mounting hole 42 and the fourth mounting hole 123 can be pin holes, and the groove 41 can also be a structure that increases the grip friction of the curved bone knife 100. In addition, the handle 4 is a cylinder with a flat surface cut off on each side of its circumference, and the ends of the flat surfaces are connected to the cylinder by arcs. The aforementioned pin holes are set on the aforementioned flat surfaces, and spring pins are placed in the pin holes to connect and fix the blade 1 and the striking handle 5. The aforementioned groove 41 is set on the entire circumference of the flat surface to increase the grip friction for striking.

[0101] like Figure 12-13 As shown, the curved bone knife 100 also includes a striking handle 5, which is inserted into and fixed to the end of the handle 4. The end face of the striking handle 5 away from the cutting edge 11 is provided with a curved surface that can be rotated and stretched along the axis; and / or, a fifth mounting hole 43 is provided on the groove 41, and a sixth mounting hole 51 is provided on the outer peripheral wall of the striking handle 5, and the fifth mounting hole 43 and the sixth mounting hole 51 are adapted to each other.

[0102] In this embodiment, the striking handle 5 is used to strike the curved bone knife 100. The curved surface of the striking handle 5 is beneficial for striking the curved bone knife 100. In addition, the third mounting hole 42 and the fourth mounting hole 123 are provided to facilitate the stable connection between the handle 4 and the striking handle 5.

[0103] It should be noted that the end of the handle 4 is provided with a second through-hole, and the striking handle 5 is inserted into and fixed in the second through-hole; in addition, the striking handle 5 is a cylinder with a first step, the smaller radius cylinder of the striking handle 5 is adapted to the second through-hole, the thickness of the larger radius cylinder is much smaller than that of the smaller radius cylinder, the diameter of the smaller radius cylinder has a certain precision, and a curved surface that is rotated and stretched along the axis is provided on the end face of the larger radius cylinder.

[0104] like Figure 4-5 As shown, the cutting edge 11 is rectangular. The end of the cutting edge 11 away from the support column 12 is the cutting edge 111, and the end close to the support column 12 is bent at a preset angle and connected to the support column 12. The preset angle ranges from 140° to 165°.

[0105] In this embodiment, the preset angle range of 140° to 165° is beneficial for transmitting the force when the osteotome is used for osteotomy.

[0106] It should be noted that the software imports the positional relationship between the three reference points 31 on the navigation identification component 3 and the cutting edge 111. Specifically, the NDI navigation head can capture the reflective spheres on the three reference points 31. The software has initially recorded the distance between the reflective spheres and the cutting edge 111, thus obtaining the actual spatial position of the cutting edge 1. In addition, one end of the cutting edge 11 is cut off with an ellipsoid at a non-central position in the vertical direction, forming a certain cutting edge angle. The other end is bent at a certain angle, and the width gradually narrows in the horizontal direction with an arc to form a connecting cylinder. The connecting cylinder is connected to the limiting part 121, which has a stepped cylindrical structure. The diameter of the limiting part 121 is much larger than that of the connecting cylinder. The end face and diameter of the limiting part 121 have a certain precision. The end of the limiting part 121 is connected to a small cylindrical boss with a diameter similar to that of the connecting cylinder.

[0107] In this application, the blade 1 and the reference holder 2 are positioned by a key, and the blade 1, the striking handle 5, and the handle 4 are connected and fixed by a spring pin.

[0108] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0109] While specific embodiments of this utility model have been described above, those skilled in the art should understand that these are merely illustrative examples, and the scope of protection of this utility model is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of this utility model, but all such changes and modifications fall within the scope of protection of this utility model.

Claims

1. A curved osteotome, said curved osteotome for periacetabular osteotomy in conjunction with navigation identification, characterized in that, The curved bone knife includes: A cutting edge, comprising a cutting edge and a support post, wherein the cutting edge is disposed at one end of the support post; A reference frame, which is detachably mounted on the end of the support column away from the cutting edge; A navigation identification element, which is detachably mounted on the reference frame; The reference frame includes a frame body and a mounting base connected to each other. The navigation identification component is detachably mounted on the frame body, and the mounting base is detachably mounted on the support column and sleeved on the support column. The support column is provided with a limiting part, which is disposed between the cutting edge and the mounting base to restrict the movement of the mounting base toward the cutting edge.

2. The curved bone knife as described in claim 1, characterized in that, The mounting base has a hollow frustum structure, the small circular end face of the mounting base matches the support column, and the small circular end face of the mounting base abuts against the end of the limiting part away from the cutting edge; And / or, the inner peripheral wall of the mounting base has a first keyway in the axial direction, and the outer peripheral wall of the support column has a second keyway in the axial direction, the first keyway and the second keyway are adapted to each other, and the second keyway is coplanar with the cutting edge.

3. The curved bone knife as described in claim 2, characterized in that, The frame body also includes a first mounting post and a second mounting post connected end to end. The navigation identification component is disposed on the second mounting post. One end of the first mounting post has a first connecting portion, and the outer peripheral wall of the mounting base is provided with a second connecting portion. The first connecting portion and the second connecting portion are detachably connected; and / or The other end of the first mounting post is connected to the second mounting post at an angle δ. The first mounting post is set at an angle γ to the radial direction of the mounting base, and the first keyway is set at an angle β to the axial direction of the first mounting post. The value of δ ranges from 90° to 110°, the value of γ ranges from 140° to 160°, and the value of β ranges from 135° to 155°. The value ranges of δ, γ, and β are configured to be recognized by navigation at multiple preset positions of the reference frame.

4. The curved bone knife as described in claim 1, characterized in that, The navigation identification component is T-shaped, with three reference points set at its three ends. The relative distances between the three reference points are a first distance, a second distance, and a third distance, respectively, and the values ​​of the first distance, the second distance, and the third distance follow the design principles of the NDI navigation head.

5. The curved bone knife as described in claim 4, characterized in that, The navigation identification device also includes an additional reference, and the distance from one of the three reference points to the additional reference is a fourth distance, the value of which follows the design principles of the NDI navigation head; The navigation identification component further includes at least two first mounting holes, and the reference frame is provided with at least two second mounting holes. The navigation identification component is mounted on the reference frame through the first mounting holes and the second mounting holes, wherein one of the at least two first mounting holes is the additional reference.

6. The curved bone knife as described in claim 2, characterized in that, The curved bone cutter also includes a handle, which is sleeved on the end of the support column away from the cutting edge. The starting end of the handle is conical and is embedded in the large circular end face of the mounting base.

7. The curved bone scalpel as described in claim 6, characterized in that, The outer peripheral wall of the handle is cut into a groove along the axial direction, and a third mounting hole is provided on the groove; a fourth mounting hole is provided on the outer peripheral wall of the end of the support column, and the third mounting hole and the fourth mounting hole are compatible.

8. The curved bone knife as described in claim 7, characterized in that, The curved bone cutter also includes a striking handle, which is inserted into and fixed to the end of the handle, and the end face of the striking handle away from the cutting edge is provided with a curved surface that is rotationally stretched along the axis; and / or, The groove is also provided with a fifth mounting hole, and the outer peripheral wall of the striking handle is provided with a sixth mounting hole, and the fifth mounting hole and the sixth mounting hole are compatible with each other.

9. The curved bone knife as described in any one of claims 1-8, characterized in that, The cutting edge is rectangular, with the end of the cutting edge away from the support column being the cutting edge, and the end closer to the support column being bent at a preset angle and connected to the support column, and the preset angle is in the range of 140° to 165°.

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