Personalized knee joint unicompartmental knee arthroplasty osteotomy guide plate assembly

Abstract

The utility model relates to the technical field of osteotomy guide plates, in particular to a personalized knee joint unicompartmental arthroplasty osteotomy guide plate assembly which comprises an osteotomy guide plate body, a first fine adjustment body and a second fine adjustment body. A second fine adjustment area is formed in the osteotomy guide plate body in the direction perpendicular to the two first fine adjustment areas, a first moving groove is formed in each first fine adjustment area, a first fine adjustment body is installed in each moving groove, and a second fine adjustment body is installed in each second fine adjustment area; the adjacent bearing plates vertically move to accommodate the fixing needles at different positions, and the position of the saw blade is changed by matching with the movement of the saw bite plate, so that the influence on subsequent osteotomy operation caused by incapability of mounting an osteotomy guide plate due to position deviation of the fixing needles is avoided, accurate osteotomy is realized, and damage to bones is reduced; the problem that the installation of the osteotomy guide plate and the subsequent osteotomy operation are affected due to the fact that deviation is prone to occurring when fixing needles are punctured into different patients is solved.

Description

Technical Field

[0001] This utility model relates to the field of osteotomy guide plate technology, specifically to a personalized osteotomy guide plate assembly for unicompartmental knee replacement. Background Technology

[0002] In unicompartmental knee replacement surgery, due to individual differences in physical condition, such as uneven bone density, irregular bone surface and structure, and uncontrollable factors such as unconscious muscle and limb movements, the fixation pin may deviate from the intended insertion position when it enters the bone for different individuals. This can affect the installation of the osteotomy guide plate and subsequent osteotomy procedures.

[0003] Therefore, this invention provides a personalized unicompartmental knee arthroplasty guide plate assembly to solve the above problems. Utility Model Content

[0004] The technical problem to be solved by this utility model is that when inserting the fixation needle into different patients, deviations can easily occur, which can affect the installation of the osteotomy guide plate and subsequent osteotomy operations.

[0005] This utility model provides the following technical solution: a personalized osteotomy guide plate assembly for unicompartmental knee replacement, comprising an osteotomy guide plate body, a first fine-tuning body, and a second fine-tuning body. The surface of the osteotomy guide plate body is provided with at least two first fine-tuning areas for adjusting positioning pins. The osteotomy guide plate body is provided with a second fine-tuning area for adjusting a saw blade in a direction perpendicular to the two first fine-tuning areas. A first moving groove is provided in the first fine-tuning area, and a first fine-tuning body is installed in the first moving groove. A second fine-tuning body for accommodating a saw blade for osteotomy is installed in the second fine-tuning area.

[0006] The first fine-tuning body includes a support plate, a first adjusting wheel, and a receiving tube. The support plate is slidably installed in the first moving groove. The side wall of the support plate is provided with a first tooth. The first adjusting wheel, which engages with the first tooth, is rotatably installed on the surface of the osteotomy guide plate body. The first adjusting wheel passes through the osteotomy guide plate body and enters the first moving groove. A first gear that meshes with the first tooth is fixedly installed at the end of the first adjusting wheel. The receiving tube is installed on the surface of the support plate. The first tooth, the first gear, and the first adjusting wheel in adjacent first fine-tuning bodies are arranged perpendicularly to each other.

[0007] The first fine-tuning body compensates for deviations in the position of the fixation pin, and can adjust the position of the receiving tube to match the position of the fixation pin that has deviated, thereby avoiding the difficulty in fixing and installing the osteotomy guide plate due to deviations in the fixation position of the fixation pin.

[0008] The receiving tube is hinged to the surface of the support plate. The first fine-tuning body also includes a threaded rod, a threaded sleeve, and a locking nut. The threaded rod is hinged to the surface of the receiving tube, and the threaded sleeve is hinged to the surface of the support plate. The locking nut is rotatably mounted on the surface of the threaded rod, and the threaded rod is rotatably mounted inside the threaded sleeve. The first fine-tuning body can also compensate for angular deviations when the fixation needle penetrates the bone. It can adjust the angular position of the receiving tube and the fixation needle relative to the osteotomy guide plate, thereby avoiding displacement of the osteotomy guide plate or difficulty in fixation due to deviations in the fixation angle of the fixation needle.

[0009] The second fine-tuning zone has a second moving groove. The second fine-tuning body includes a saw blade and a second adjusting wheel. The saw blade is fixedly provided with second teeth along a direction perpendicular to the two first fine-tuning zones. The osteotomy guide plate body is rotatably mounted with the second adjusting wheel near the second teeth. The second adjusting wheel is coaxially and fixedly connected to a second gear that engages with the second teeth. The second fine-tuning body can vertically adjust the saw blade position to achieve precise osteotomy.

[0010] A hollow first spherical notch is fixedly disposed within the osteotomy guide plate. The receiving tube passes through the hollow spherical notch, and a second spherical notch is fixedly installed on the surface of the receiving tube. The second spherical notch is located within the first spherical notch and is spherically hinged. This facilitates adjustment of the angle between the receiving tube and the fixation pin.

[0011] The threaded rod, threaded sleeve, and locking nut are arranged in four rows along the circumference of the receiving tube.

[0012] The beneficial effects of this utility model are as follows:

[0013] 1. This utility model, through the interaction of the first tooth on the mutually perpendicular side of adjacent support plates and the first adjusting wheel, enables the adjacent support plates to move in mutually perpendicular directions. This allows for the accommodation of fixing pins at different positions, preventing the inability to install the osteotomy guide plate and subsequent osteotomy operations due to deviations in the installation position of the fixing pins. Furthermore, it can also work with the second tooth and the second adjusting wheel to control the movement of the saw blade perpendicular to the first fine-tuning zone, thereby changing the saw blade position. This allows for position compensation when there are deviations in the height position of the fixing pins, achieving precise bone sawing, reducing damage to the bone, and providing personalized position adjustment to reduce the impact of deviations in the insertion position of the fixing pins.

[0014] 2. In this utility model, the angle of the receiving tube can be adjusted by rotating the threaded sleeve, so as to accommodate the fixing pin with an angle deviation, and avoid the fixing pin insertion angle deviation caused by personal reasons affecting the fixation of the osteotomy guide plate and subsequent osteotomy operation. Attached Figure Description

[0015] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a top view cross-sectional structural diagram of the first fine-tuning area of ​​this utility model;

[0018] Figure 3 This is a side view sectional structural diagram of the first fine-tuning area of ​​this utility model;

[0019] Figure 4 This is a top view cross-sectional structural diagram of the second fine-tuning area of ​​this utility model;

[0020] Figure 5 This is a schematic diagram of the threaded rod and threaded sleeve in the first fine-tuning body of this utility model;

[0021] Figure 6 This is a schematic diagram of the ball joint structure of the first and second ball notches of this utility model.

[0022] In the diagram: 1. Osteotomy guide plate body; 11. First fine-tuning area; 111. First moving groove; 12. Second fine-tuning area; 121. Second moving groove; 2. First fine-tuning body; 21. Support plate; 211. First tooth; 212. First ball notch; 22. First adjusting wheel; 23. First gear; 24. Receiving tube; 241. Second ball notch; 25. Threaded rod; 26. Support rod; 27. Mounting ring; 28. Threaded sleeve; 29. ​​Locking nut; 3. Second fine-tuning body; 31. Saw plate; 311. Second tooth; 32. Second adjusting wheel; 321. Second gear. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Therefore, the following detailed description of the embodiments of this utility model is not intended to limit the scope of the claimed utility model, but merely represents some embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0024] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0025] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," and "back side," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of this utility model is conventionally placed during use. These terms are used only for the convenience of describing this utility model and for 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.

[0026] It should also be noted that, in the description of this utility model, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0027] Because individual patient constitution and physician error can easily lead to deviations in the insertion of fixation pins, affecting subsequent osteotomy procedures, and designing and manufacturing a separate osteotomy guide assembly for each patient to avoid surgical deviations is prohibitively expensive for most patients. Therefore, this disclosure aims to solve the problem of deviations in fixation pin insertion for different patients, which affects the installation of the osteotomy guide and subsequent osteotomy procedures. This disclosure provides personalized adjustments to address the issue of osteotomy guide installation failure due to individual factors caused by fixation pin insertion deviations, thus reducing the impact of fixation pin insertion deviations on subsequent osteotomy procedures.

[0028] In view of this, the present disclosure provides a personalized osteotomy guide plate assembly for unicompartmental knee replacement, including an osteotomy guide plate body 1, a first fine-tuning body 2, and a second fine-tuning body 3. The osteotomy guide plate body 1 has at least two first fine-tuning areas 11 arranged side by side on its surface for adjusting the positioning pin. The osteotomy guide plate body 1 has a second fine-tuning area 12 arranged perpendicular to the two first fine-tuning areas 11 for adjusting the saw blade. A first moving groove 111 is formed in the first fine-tuning area 11, and the first fine-tuning body 2 is installed in the first moving groove 111. The second fine-tuning area 12 is equipped with a second fine-tuning body 3 for accommodating the saw blade for osteotomy.

[0029] The first fine-tuning body 2 includes a support plate 21, a first adjusting wheel 22, and a receiving tube 24. The support plate 21 is slidably installed in the first moving groove 111. The side wall of the support plate 21 is provided with a first tooth 211. The first adjusting wheel 22, which engages with the first tooth 211, is rotatably installed on the surface of the osteotomy guide plate body 1. The first adjusting wheel 22 penetrates the osteotomy guide plate body 1 and enters the first moving groove 111. A first gear 23 that meshes with the first tooth 211 is fixedly installed at the end of the first adjusting wheel 22. The receiving tube 24 is installed on the surface of the support plate 21.

[0030] The first fine-tuning body 2 adjusts the position of the support plate 21 and the receiving tube 24, thereby compensating for deviations in the position of the fixation pin. The position of the receiving tube 24 can be adjusted to match the fixation pin with a positional deviation, thus avoiding the difficulty in fixing and installing the osteotomy guide plate due to deviations in the fixation position of the fixation pin.

[0031] The arrangement directions of the first teeth 211 and the first adjusting wheel 22 in the adjacent fine-tuning zones are perpendicular to each other, so that the support plates 21 in the two first fine-tuning zones 11 can move in mutually perpendicular directions through the mutually perpendicular first teeth 211 and the first adjusting wheel 22. Thus, when the two fixed needles deviate from their bone insertion positions, the two mutually perpendicularly moving support plates 21 and the receiving tube 24 can change their positions to accommodate the deviated fixed needles, so that the osteotomy guide plate can still be fixed when the fixed needle insertion position deviates.

[0032] Specifically, for example, when both fixing pins experience horizontal positional deviation, the cooperation between the bearing plate 21 with its first tooth 211 set horizontally and the first adjusting wheel 22 controls the horizontal movement of the bearing plate 21 and the receiving tube 24, thereby enabling the receiving tube 24 to accommodate the fixing pin with the horizontal positional deviation. When both fixing pins experience vertical positional deviation, the cooperation between the bearing plate 21 with its first tooth 211 set vertically and the first adjusting wheel 22 controls the vertical movement of the bearing plate 21 and the receiving tube 24 to accommodate the fixing pin with the vertical positional deviation. The vertical movement of one bearing plate 21 and the receiving tube 24 ensures that the two receiving tubes 24 correspond to the fixing pins with vertical deviations, thereby compensating for the position of the fixing pins with vertical deviations.

[0033] It should be noted that if the two fixed pins simultaneously deviate in both horizontal and vertical positions, the bearing plates 21 in the two first fine-tuning zones 11 will be controlled to move perpendicularly to each other.

[0034] The receiving tube 24 is used to receive the fixing needle. When the position of the fixing needle is deviated, the operator rotates the first adjusting wheel 22, thereby causing the first adjusting wheel 22 to drive the first gear 23 that is matched in the same direction to rotate, and the first teeth 211 that mesh with each other to drive the support plate 21 to move.

[0035] The receiving tube 24 is hinged to the surface of the bearing plate 21. The first fine-tuning body 2 also includes a threaded rod 25, a support rod 26, a mounting ring 27, a threaded sleeve 28, and a locking nut 29. The receiving tube 24 is hinged to the surface of the threaded rod 25. The support rod 26 is symmetrically fixedly installed on the surface of the bearing plate 21. The mounting ring 27 is hinged between the support rods 26. The threaded sleeve 28 is rotatably installed inside the mounting ring 27. The locking nut 29 is rotatably installed on the surface of the threaded rod 25. The threaded rod 25 is rotatably installed inside the threaded sleeve 28.

[0036] After the fixation needle is inserted into the bone, if the fixation needle deviates from its fixed angle, the operator rotates the threaded sleeve 28 so that the threaded sleeve 28 rotates within the mounting ring 27, thereby causing the threaded rod 25 to extend into or slide out of the threaded sleeve 28. This causes the threaded rod 25 to move the end of the receiving tube 24 closer to or further away from the threaded sleeve 28. After the threaded rod 25 has completed extending into or sliding out of the threaded sleeve 28, the locking nut 29 is tightened to fit against the threaded sleeve 28 for fixation, thereby maintaining the position of the threaded rod 25 and the receiving tube 24.

[0037] While the first fine-tuning body 2 adjusts the position of the receiving tube 24 and the fixing needle, it can also adjust the angle of the receiving tube 24 and the fixing needle through the cooperation of the threaded rod 25, the support rod 26, the mounting ring 27, the threaded sleeve 28 and the locking nut 29. This compensates for the angle deviation when the fixing needle penetrates the bone. It can adjust the angle position of the receiving tube 24 and the fixing needle relative to the osteotomy guide plate, thereby avoiding the displacement of the osteotomy guide plate position or difficulty in fixing caused by the deviation of the fixing angle of the fixing needle.

[0038] The second fine-tuning zone 12 is provided with a second moving groove 121. The second fine-tuning body 3 includes a saw plate 31 and a second adjusting wheel 32. The saw plate 31 is fixedly provided with a second tooth 311 in a direction perpendicular to the two first fine-tuning zones 11. The osteotomy guide plate body 1 is rotatably mounted with the second adjusting wheel 32 on the side close to the second tooth 311. The second adjusting wheel 32 is coaxially fixedly connected with a second gear 321 that fits the second tooth 311.

[0039] During osteotomy, if the position of the fixation needle deviates vertically or the pre-insertion position deviates vertically, excessive osteotomy may occur. The operator can rotate the second adjusting wheel 32 to drive the second gear 321 to rotate, thereby causing the second gear 321 to drive the meshing second teeth 311 and the saw blade 31 to move vertically, thus enabling vertical adjustment of the saw blade position to achieve precise osteotomy.

[0040] It should be noted that the sliding installation method of the bearing plate 21 and the saw blade 31 is prior art, and any existing installation method capable of achieving sliding can be used. Furthermore, the second fine-tuning area 12 has the same internal structure as the vertically moving first fine-tuning area 11, and can be connected via an attachment... Figure 2-4 Mutual reference.

[0041] A hollow first spherical notch 212 is fixedly disposed inside the bearing plate 21. The receiving tube 24 passes through the hollow spherical notch, and a second spherical notch 241 is fixedly installed on the surface of the receiving tube 24. The second spherical notch 241 is located inside the first spherical notch 212 and is spherically hinged. When the threaded rod 25 extends into or slides out of the threaded sleeve 28, thereby moving the end of the receiving tube 24, the receiving tube 24 swings with the first spherical notch 212 and the second spherical notch 241 as hinge points, so that the second spherical notch 241 slides inside the first spherical notch 212 to achieve spherical hinge, thereby making it easy to adjust the angle of the receiving tube 24 and the fixing pin.

[0042] It should be noted that the swing stop point of the receiving tube 24 is the contact point between the fixing pin and the first ball notch 212. When turning the threaded rod 25, it should be turned slowly to avoid the fixing pin and the first ball notch 212 applying excessive force to each other and affecting the fixing effect.

[0043] Furthermore, it should be emphasized that the insertion position of the fixation pin is preset before insertion, and the deviation in insertion is due to minor deviations caused by individual factors. Therefore, the position adjustment of the support plate 21 and the fixation pin is also a minor fine-tuning. The purpose is to facilitate the precise positioning of the fixation pin, facilitate the precise installation of the osteotomy guide plate, achieve precise osteotomy, and reduce damage to the bone.

[0044] The angular deviation of the fixing pin when it pierces the bone is usually minor. Therefore, when adjusting the angle using the threaded rod 25 and the threaded sleeve 28, the fixing pin will not contact the first ball notch 212. Similarly...

[0045] The threaded rod 25, threaded sleeve 28, and locking nut 29 are arranged in four circumferential arrays along the receiving tube 24. The four circumferential arrays can adjust the angle of the receiving tube 24 in four directions, thereby facilitating omnidirectional angle adjustment of the receiving tube 24 and the fixing pin while providing stable support for them. This improves the stability of the support and the flexibility of angle adjustment.

[0046] After the fixation pin is inserted during the osteotomy, if the pin's position deviates during insertion, the operator rotates the corresponding first adjusting wheel 22 according to the direction of the horizontal or vertical deviation. This causes the first adjusting wheel 22 to drive the corresponding first gear 23 to rotate in that direction, and through the meshing first teeth 211, it drives the support plate 21 to move horizontally and / or vertically. This adjusts the position of the receiving tube 24 and the fixation pin, preventing difficulties in fixing the osteotomy guide plate due to deviations in the pin's fixation position. After the osteotomy guide plate is fixed, the operator rotates the second adjusting wheel 32, causing the second gear 321 to rotate. This, through the meshing second teeth 311, drives the saw plate 31 to move vertically, allowing for vertical adjustment of the saw position to achieve precise osteotomy when the pin's insertion position deviates.

[0047] If the angle of the fixing pin deviates, the operator rotates the threaded sleeve 28, causing it to rotate within the mounting ring 27. This allows the threaded rod 25 to extend into or slide out of the threaded sleeve 28. The threaded rod 25 then moves the end of the receiving tube 24 closer to or further away from the threaded sleeve 28. This, combined with the ball joints of the second ball notch 241 and the first ball notch 212, causes the angle of the receiving tube 24 relative to the osteotomy guide plate to shift. This compensates for any angle deviation when the fixing pin pierces the bone, adjusting the angular position of the receiving tube 24 and the fixing pin relative to the osteotomy guide plate. This prevents the osteotomy guide plate from shifting or becoming difficult to fix due to a deviation in the fixing angle of the fixing pin. After the threaded rod 25 has fully extended into or slid out of the threaded sleeve 28, the locking nut 29 is tightened to fit against the threaded sleeve 28 for fixation, thus maintaining the position of the threaded rod 25 and the receiving tube 24.

[0048] Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A personalized knee unicompartmental replacement osteotomy guide assembly comprising an osteotomy guide body (1), a first fine adjustment body (2) and a second fine adjustment body (3), characterized in that: The osteotomy guide plate body (1) is provided with at least two first fine adjustment zones (11) for adjusting positioning needles on the surface in parallel, the osteotomy guide plate body (1) is provided with a second fine adjustment zone (12) for adjusting a saw blade in the direction perpendicular to the two first fine adjustment zones (11), the first fine adjustment zone (11) is provided with a first moving groove (111), and the first fine adjustment body (2) is installed in the moving groove. The first fine adjustment body (2) comprises a bearing plate (21), a first adjusting wheel (22), a first gear (23) and a containing pipe (24), the bearing plate (21) is slidingly installed in the moving groove, the side wall of the bearing plate (21) is provided with first teeth (211), the first adjusting wheel (22) matched with the first teeth (211) is rotationally installed on the surface of the osteotomy guide plate body (1), the first adjusting wheel (22) penetrates the osteotomy guide plate body (1) into the moving groove, the first gear (23) engaged with the first teeth (211) is fixedly installed at the end of the first adjusting wheel (22), and the containing pipe (24) is installed on the surface of the bearing plate (21).

2. The personalized knee unicompartmental replacement osteotomy guide assembly according to claim 1, characterized in that: The first teeth (211), the first gear (23) and the first adjusting wheel (22) in the adjacent first fine adjustment body (2) are arranged in directions perpendicular to each other.

3. The personalized knee unicompartmental replacement osteotomy guide assembly according to claim 2, characterized in that: The containing pipe (24) is hinged on the surface of the bearing plate (21), the first fine adjustment body (2) further comprises a threaded rod (25), a support rod (26), a mounting ring (27), a threaded sleeve (28) and a locking nut (29), the threaded rod (25) is hinged on the surface of the containing pipe (24), the support rod (26) is fixedly and symmetrically installed on the surface of the bearing plate (21), the mounting ring (27) is hingedly connected between the support rods (26), the threaded sleeve (28) is rotationally installed in the mounting ring (27), the locking nut (29) is rotationally installed on the surface of the threaded rod (25), and the threaded rod (25) is rotationally installed in the threaded sleeve (28).

4. The personalized knee unicompartmental replacement osteotomy guide assembly according to claim 3, characterized in that: The osteotomy guide plate body (1) is provided with the second fine adjustment zone (12) in the direction perpendicular to the two fine adjustment zones, the second fine adjustment zone (12) is provided with a second moving groove (121), the second fine adjustment body (3) comprises a saw slot plate (31) and a second adjusting wheel (32), the second teeth (311) are fixedly arranged on the saw slot plate (31) in the direction perpendicular to the two first fine adjustment zones (11), the second adjusting wheel (32) is rotationally installed on the side of the osteotomy guide plate body (1) close to the second teeth (311), and the second gear (321) engaged with the second teeth (311) is fixedly connected to the coaxial center of the second adjusting wheel (32).

5. The personalized knee unicompartmental replacement osteotomy guide assembly according to claim 4, characterized in that: The first hollow spherical recess (212) is fixedly arranged in the osteotomy guide plate body (1), the containing pipe (24) penetrates the hollow spherical recess, the second spherical recess (241) is fixedly installed on the surface of the containing pipe (24), and the second spherical recess (241) is ball-hingedly arranged in the first spherical recess (212).

6. The personalized knee unicompartmental replacement osteotomy guide assembly according to claim 5, characterized in that: The threaded rod (25), the supporting rod (26), the mounting ring (27), the threaded sleeve (28) and the locking nut (29) are arranged circumferentially along the containing tube (24) in four.

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