Arc-shaped osteotomy guide plate on ankle
By designing an arc-shaped osteotomy guide plate above the ankle and using a combination of sliding parts and threaded rods, the problem of inaccurate drawing of the osteotomy radius during the arc-shaped osteotomy above the ankle was solved, and precise adjustment and positioning of the osteotomy process were achieved.
Patent Information
- Application Number
- CN202423012101.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-06
- Publication Date
- 2026-01-02
- Estimated Expiration
- 2034-12-06
AI Technical Summary
Clinically, there is a lack of precise guiding devices for drawing the osteotomy radius based on calculated values during the arc-shaped osteotomy of the ankle, resulting in poor positioning accuracy.
A curved osteotomy guide plate for the ankle is designed, comprising a plate, a sliding member, and a threaded rod. The osteotomy radius can be precisely adjusted and fixed by the reciprocating motion of the sliding member in the elongated hole and the positioning of the threaded rod.
This improved the accuracy of osteotomy radius drawing, ensuring the precision of the osteotomy process and the accuracy of positioning.
Smart Images
Figure CN223746428U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to the technical field of medical apparatus and instruments, and particularly relates to an arc-shaped osteotomy guide plate above the ankle. BACKGROUND
[0002] The mechanism of ankle osteotomy treatment is to move the weight-bearing axis outward by osteotomy, so that the load is more distributed on the top lateral part of the talus which still retains cartilage, and the medial part is protected, thereby delaying or even preventing the progression of arthritis. For non-end-stage ankle arthritis, ankle osteotomy significantly improves pain, function and imaging arthritis performance in the early and middle stages, and can delay the time of fusion or replacement. There is currently a lack of a guiding device for drawing the osteotomy radius according to the calculated value during the process of arc-shaped osteotomy above the ankle. When the user implements treatment, a metal guide plate with poor positioning accuracy is often used.
[0003] Therefore, an auxiliary circle drawing device capable of accurately adjusting the osteotomy radius during the process of arc-shaped osteotomy above the ankle is designed, and the auxiliary circle drawing device is specifically an arc-shaped osteotomy guide plate above the ankle. CONTENT OF THE UTILITY MODEL
[0004] In order to overcome the problems in the background art, the utility model adopts the following technical solutions:
[0005] An arc-shaped osteotomy guide plate above the ankle comprises a plate member and a sliding member. The plate member is provided with a positioning hole one and a long hole. The positioning hole one and the long hole are not coincident. The sliding member is slidably connected to the long hole in a movement direction. The sliding member is provided with a positioning hole two. The central axis of the positioning hole two is parallel to the central axis of the positioning hole one. The inner diameter of the positioning hole one is not less than 2 mm. The inner diameter of the positioning hole two is not less than 2 mm.
[0006] Further, the sliding member can move to a proximal end position and a distal end position in the long hole. The displacement of the sliding member from the proximal end position to the distal end position in the movement direction is the movement stroke of the sliding member. When the sliding member approaches the positioning hole one, the sliding direction is opposite to the movement direction. When the sliding member is at the proximal end position, the spacing between the sliding member and the positioning hole one is the smallest. When the sliding member is at the distal end position, the spacing between the sliding member and the positioning hole two is the largest.
[0007] Further, the outer wall of the plate member is provided with a scale mark in the movement direction. The zero scale line of the scale mark is aligned with the central axis of the positioning hole one in the movement direction. When the sliding member moves to the distal end position, the maximum scale line of the scale mark is aligned with the central axis of the positioning hole two in the movement direction. The scale mark comprises a plurality of scale lines with the same spacing. The vertical spacing between the zero scale line and the maximum scale line is at least 60 mm. When the sliding member moves to the proximal end position, the scale mark aligned with the central axis of the positioning hole two in the movement direction is at least 30 mm. The vertical spacing between adjacent scale lines is 1 mm.
[0008] Further, the sliding member comprises a connecting part and a limiting part, the connecting part is sleeved in the long hole, the limiting part is symmetrically connected on both sides of the connecting part along the axial direction of the second positioning hole, and the limiting parts on both sides of the connecting part are in contact with the outer walls of the plate member on both sides and limit the movement of the sliding member along the axial direction of the second positioning hole when the sliding member moves. The length of the connecting part along the axial direction of the second positioning hole is not less than the thickness of the plate member, so that the limiting parts are prevented from clamping the plate member from both sides and the sliding member cannot slide; the outer diameter of the connecting part is not greater than the inner diameter of the long hole, and the outer diameter of the limiting part is greater than the inner diameter of the long hole, so that the connecting part is always located on both sides of the long hole.
[0009] Further, the sliding member is provided with a threaded hole, the threaded hole is communicated with the outer wall of the sliding member and the first positioning hole, and the central axis of the threaded hole is perpendicular to the central axis of the first positioning hole. The threaded hole is arranged on the connecting part, and the outer diameter of the threaded hole is smaller than the length of the connecting part along the axial direction of the first positioning hole.
[0010] Further, the outer wall of the plate member is provided with a stroke groove, the stroke groove is communicated with the long hole; the threaded hole is bolted with a threaded rod, the central axis of the threaded rod is coincident with the central axis of the threaded hole, the threaded rod reciprocates along the radial direction of the second positioning hole when rotating along the axial direction of the threaded rod, and the threaded rod abuts against the inner wall of the stroke groove when moving away from the second positioning hole along the radial direction of the first positioning hole. The threaded rod does not contact the stroke groove in the initial position, and the sliding member can be positioned in the long hole when moving to the position of abutting against the stroke groove away from the second positioning hole, so that the freedom degree of reciprocating movement of the sliding member in the long hole along the movement direction is limited.
[0011] Further, the outer wall of the threaded rod is provided with a pushing part along the radial direction, the pushing part can move to the initial position and protrude out of the outer wall of the plate member through the stroke groove when rotating along the axial direction of the threaded rod, and the pushing part does not contact the inner wall of the stroke groove when being in the initial position.
[0012] Further, the pushing part can also move to a terminal position when rotating along the axial direction of the threaded rod, and the threaded rod rotates and approaches the second positioning hole when the pushing part moves from the initial position to the terminal position, and the pushing part abuts against the inner wall of the stroke groove when moving to the terminal position.
[0013] The beneficial effects of the utility model are as follows:
[0014] By setting the plate member with the positioning hole one and the long hole, and setting the sliding member capable of reciprocating in the long hole, the user can express the measured bone cutting radius as the distance between the positioning hole one and the positioning hole two; by setting the threaded rod bolted with the sliding member and provided with the knob part, the user can fix the position of the sliding member in the long hole after determining the bone cutting radius, which can prevent the sliding member from relatively sliding with the plate member when drawing the bone cutting arc, thereby facilitating to improve the accuracy of the bone cutting radius drawing result. BRIEF DESCRIPTION OF DRAWINGS
[0015] In order to more clearly illustrate the technical scheme of the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained according to these drawings without creative labor for those skilled in the art. Among them:
[0016] Figure 1 The structure schematic view of the present application when the sliding member is in the proximal end position;
[0017] Figure 2 The structure schematic view of the present application when the sliding member is in the distal end position; Figure 1 The sectional structure schematic view of the plate member;
[0018] Figure 3 The local enlarged structure schematic view of the plate member; Figure 2
[0019] Figure 4 The structure schematic view of the present application when the sliding member is in the distal end position;
[0020] Figure 5 The sectional structure schematic view of the plate member;
[0021] Figure 6 The assembly structure schematic view of the threaded rod and the sliding member when the knob part is in the initial position;
[0022] Figure 7 The assembly structure schematic view of the threaded rod and the sliding member when the knob part is in the terminal position;
[0023] In the drawings, 1, plate member; 11, positioning hole one; 12, long hole; 13, scale mark; 131, zero scale line; 132, maximum scale line; 14, stroke groove; 2, sliding member; 21, positioning hole two; 22, connecting part; 23, limiting part; 24, threaded hole; 25, threaded rod; 251, knob part; 3, movement direction. DETAILED DESCRIPTION
[0024] The technical solutions of this utility model are clearly and completely described below through specific embodiments. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.
[0025] A type of supra-ankle arc-shaped osteotomy guide, such as Figures 1-7 As shown, the device includes: a plate 1, which has a through-hole 11 and an elongated hole 12, the through-hole 11 and the elongated hole 12 not coinciding; and a sliding member 2, which is slidably connected to the elongated hole 12 along a movement direction 3, the sliding member 2 having a through-hole 21, the central axis of which is parallel to the central axis of the through-hole 11. The inner diameter of the through-hole 11 is not less than 2mm, and the inner diameter of the through-hole 21 is not less than 2mm.
[0026] In some embodiments of this application, such as Figures 1-7 As shown, the slider 2 can move to a proximal position and a distal position within the elongated hole 12. The displacement of the slider 2 from the proximal position to the distal position along the movement direction 3 is the movement stroke of the slider 2. When the slider 2 approaches the positioning hole 11, the sliding direction is opposite to the movement direction 3. When the slider 2 is in the proximal position, the distance between it and the positioning hole 11 is the smallest, and when the slider 2 is in the distal position, the distance between it and the positioning hole 21 is the largest.
[0027] In some embodiments of this application, such as Figures 1-7 As shown, the outer wall of plate 1 is provided with scale markings 13 along the movement direction 3. The zero scale line 131 of scale marking 13 is aligned with the central axis of positioning hole 11 in the movement direction 3. When the slider 2 moves to the distal position, the maximum scale line 132 of scale marking 13 is aligned with the central axis of positioning hole 21 in the movement direction 3. Scale marking 13 includes multiple equally spaced scale lines. The vertical distance between the zero scale line 131 and the maximum scale line 132 is at least 60 mm. When the slider 2 moves to the proximal position, the reading of scale marking 13 aligned with the central axis of positioning hole 21 in the movement direction 3 is at least 30 mm. The distance between positioning hole 11 and positioning hole 21 is the osteotomy radius. The vertical distance between adjacent scale lines is 1 mm.
[0028] In some embodiments of this application, such as Figures 1-7As shown, the sliding member 2 comprises a connecting portion 22 and a limiting portion 23, the connecting portion 22 is sleeved in the long hole 12, the limiting portion 23 is symmetrically connected on both sides of the connecting portion 22 along the axial direction of the positioning hole two 21, and the limiting portions 23 on both sides of the connecting portion 22 are in contact with the outer walls of the plate member 1 and limit the movement of the sliding member 2 along the axial direction of the positioning hole two 21 when the sliding member 2 moves. The length of the connecting portion 22 along the axial direction of the positioning hole two 21 is not less than the thickness of the plate member 1, which prevents the limiting portion 23 from clamping the plate member 1 from both sides and makes the sliding member 2 unable to slide; the outer diameter of the connecting portion 22 is not greater than the inner diameter of the long hole 12, and the outer diameter of the limiting portion 23 is greater than the inner diameter of the long hole 12, so that the connecting portion 22 is always on both sides of the long hole 12.
[0029] In some embodiments of the present application, as shown in Figures 1-7 The sliding member 2 is provided with a threaded hole 24, the threaded hole 24 is communicated with the outer wall of the sliding member 2 and the positioning hole one 11, and the central axis of the threaded hole 24 is perpendicular to the central axis of the positioning hole one 11. The threaded hole 24 is arranged on the connecting portion 22, and the outer diameter of the threaded hole 24 is smaller than the length of the connecting portion 22 along the axial direction of the positioning hole one 11.
[0030] In some embodiments of the present application, as shown in Figures 1-7 The outer wall of the plate member 1 is provided with a stroke groove 14, the stroke groove 14 is communicated with the long hole 12; the threaded hole 24 is bolted with a threaded rod 25, the central axis of the threaded rod 25 coincides with the central axis of the threaded hole 24, and the threaded rod 25 reciprocates along the radial direction of the positioning hole two 21 when rotating around its axial direction, and the threaded rod 25 abuts against the inner wall of the stroke groove 14 when moving away from the positioning hole two 21 along the radial direction of the positioning hole. The threaded rod 25 does not contact the stroke groove 14 in the initial position, and when moving away from the positioning hole two 21 to abut against the stroke groove 14, the sliding member 2 can be positioned in the long hole 12, thereby limiting the freedom degree of the sliding member 2 reciprocating in the long hole 12 along the movement direction 3. After positioning the sliding member 2, the kirschner wire or other instruments passing through the positioning hole two 21 and moving cannot drive the sliding member 2 to slide in the long hole 12, which is beneficial to improve the accuracy of the equidistant circle drawing.
[0031] In some embodiments of the present application, as shown in Figures 1-7 The outer wall of the threaded rod 25 is provided with a pushing portion 251 along the radial direction, the pushing portion 251 can move to the initial position and protrude out of the outer wall of the plate member 1 through the stroke groove 14 when rotating around the axial direction of the threaded rod 25, and the pushing portion 251 does not contact the inner wall of the stroke groove 14 when the pushing portion 251 is in the initial position.
[0032] In some embodiments of the present application, as shown in Figures 1-7As shown, the toggle part 251 can also move to the terminal position when it rotates around the axial direction of the threaded rod 25. When the toggle part moves from the initial position to the terminal position, the threaded rod 25 rotates and approaches the positioning hole two 21. When the toggle part 251 moves to the terminal position, it abuts against the inner wall of the stroke groove 14, so that the toggle part 251 cannot move linearly in the stroke groove 14 along the movement direction 3, thereby limiting the reciprocating movement of the sliding part 2 in the movement direction 3, and finally achieving the effect of accurately positioning the sliding part 2.
Claims
1. A curved osteotomy guide above the ankle, characterized in that, The utility model relates to a kind of positioner, including, The plate member is provided with a positioning hole one and a long hole, the positioning hole one is not coincident with the long hole;Sliding member can be slidably connected to the long hole along a movement direction, the sliding member is provided with a positioning hole two, the central axis of the positioning hole two is parallel to the central axis of the positioning hole one.
2. The arthroplasty guide of claim 1, wherein, The sliding member can move to a proximal end position and a distal end position in the long hole, and the displacement of the sliding member from the proximal end position to the distal end position along the movement direction is the movement stroke of the sliding member.
3. The ankle-shaped arc-shaped osteotomy guide plate according to claim 2, characterized in that, The outer wall of the plate member is provided with a scale mark along the movement direction, and the zero scale line of the scale mark is aligned with the central axis of the positioning hole one in the movement direction;When the sliding member moves to the distal end position, the maximum scale line of the scale mark is aligned with the central axis of the positioning hole two in the movement direction.
4. The arthroplasty guide of claim 1, wherein, The sliding member includes a connecting portion and a limiting portion, the connecting portion is sleeved in the long hole, and the limiting portion is symmetrically connected to both sides of the connecting portion along the axial direction of the positioning hole two, and the limiting portions on both sides of the connecting portion are respectively in contact with the outer walls on both sides of the plate member and limit the movement of the sliding member along the axial direction of the positioning hole two when the sliding member moves.
5. The arthroplasty guide of claim 1, wherein, The sliding member is provided with a threaded hole, and the threaded hole communicates the outer wall of the sliding member and the positioning hole one, and the central axis of the threaded hole is perpendicular to the central axis of the positioning hole one.
6. The ankle-shaped arc-shaped osteotomy guide plate according to claim 5, characterized in that, The outer wall of the plate member is provided with a stroke groove, and the stroke groove communicates with the long hole;The threaded hole is bolt-connected with a threaded rod, the central axis of the threaded rod coincides with the central axis of the threaded hole, the threaded rod reciprocates along the radial direction of the positioning hole two when rotating around its axial direction, and the threaded rod abuts against the inner wall of the stroke groove when moving away from the positioning hole two along the radial direction of the positioning hole.
7. The ankle-shaped arc-shaped osteotomy guide plate according to claim 6, characterized in that, The outer wall of the threaded rod is provided with a pushing portion along the radial direction, and the pushing portion can move to an initial position and protrude out of the outer wall of the plate member through the stroke groove when rotating around the axial direction of the threaded rod, and the pushing portion is not in contact with the inner wall of the stroke groove when the pushing portion is in the initial position.
8. The arthroplasty guide of Claim 7, wherein, The pushing portion can also move to a terminal position when rotating around the axial direction of the threaded rod, and the pushing portion abuts against the inner wall of the stroke groove when the pushing portion moves to the terminal position.
9. The arthroplasty guide of Claim 3, wherein, The vertical distance between adjacent scale lines is 1 mm.
10. The arthroplasty guide of claim 1, wherein, The inner diameter of the positioning hole one is not less than 2 mm, and the inner diameter of the positioning hole two is not less than 2 mm.