CN107007319B - Tibia unicondylar osteotomy device - Google Patents
Tibia unicondylar osteotomy device Download PDFInfo
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- CN107007319B CN107007319B CN201710352961.2A CN201710352961A CN107007319B CN 107007319 B CN107007319 B CN 107007319B CN 201710352961 A CN201710352961 A CN 201710352961A CN 107007319 B CN107007319 B CN 107007319B
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- 210000002303 tibia Anatomy 0.000 title claims abstract description 12
- 210000000988 bone and bone Anatomy 0.000 description 10
- 238000005520 cutting process Methods 0.000 description 9
- 238000000034 method Methods 0.000 description 4
- 210000000629 knee joint Anatomy 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 210000003127 knee Anatomy 0.000 description 2
- 239000002861 polymer material Substances 0.000 description 2
- 230000002441 reversible effect Effects 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 238000011882 arthroplasty Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 210000003041 ligament Anatomy 0.000 description 1
- 210000003141 lower extremity Anatomy 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 210000004872 soft tissue Anatomy 0.000 description 1
- 238000001356 surgical procedure Methods 0.000 description 1
- 210000001519 tissue Anatomy 0.000 description 1
Classifications
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/14—Surgical saws ; Accessories therefor
- A61B17/15—Guides therefor
- A61B17/154—Guides therefor for preparing bone for knee prosthesis
- A61B17/157—Cutting tibia
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/16—Bone cutting, breaking or removal means other than saws, e.g. Osteoclasts; Drills or chisels for bones; Trepans
- A61B17/17—Guides or aligning means for drills, mills, pins or wires
- A61B17/1732—Guides or aligning means for drills, mills, pins or wires for bone breaking devices
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/16—Bone cutting, breaking or removal means other than saws, e.g. Osteoclasts; Drills or chisels for bones; Trepans
- A61B17/17—Guides or aligning means for drills, mills, pins or wires
- A61B17/1739—Guides or aligning means for drills, mills, pins or wires specially adapted for particular parts of the body
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Surgery (AREA)
- Orthopedic Medicine & Surgery (AREA)
- Dentistry (AREA)
- Animal Behavior & Ethology (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Veterinary Medicine (AREA)
- Public Health (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Medical Informatics (AREA)
- Molecular Biology (AREA)
- Oral & Maxillofacial Surgery (AREA)
- General Health & Medical Sciences (AREA)
- Physical Education & Sports Medicine (AREA)
- Transplantation (AREA)
- Surgical Instruments (AREA)
Abstract
The invention discloses a tibia unicondylar osteotomy device, which comprises an osteotomy plate, a guide plate and a connecting structure, wherein the osteotomy plate is provided with an osteotomy groove; the guide plate comprises a first surface, wherein the first surface is matched with the tibia platform and is used for positioning the tibia unicondylar osteotomy device; the connecting structure comprises a first connecting piece and a second connecting piece, wherein the first connecting piece is slidably arranged on the second connecting piece, the first connecting piece is fixed on the guide plate, and the second connecting piece is fixedly arranged on the osteotomy plate. Through setting up this first connecting piece slidable on the second connecting piece, can make the osteotomy board remove for the baffle to realize the position adjustment of osteotomy board, thereby realize the accurate location to the osteotomy board.
Description
Technical Field
The invention relates to the technical field of unicondylar replacement, in particular to a unicondylar replacement tibial unicondylar osteotomy device.
Background
In the current procedure of tibial osteotomies for knee unicondylar replacement (unicondylar knee arthroplasty, UKA), a typical procedure is to perform a vertical osteotomies first, followed by a horizontal osteotomies. Traditional unicondylar replacement surgery performs extramedullary positioning osteotomies through a mechanical guide, and the operator positions anatomical landmarks, lower limb force lines, and prosthesis rotation axes by means of the naked eye, hand feel, and experience, and then manually score the osteotomies, and places the prosthesis. Because the operator subjectively performs alignment and alignment in the conventional unicondylar replacement operation, the reliability of the positioning mode and the accuracy of the operation are affected, and even the operation fails.
The medial single-compartment knee joint replacement is a method for implanting an artificial knee joint prosthesis after removing tissues at a joint by using an operation tool, by which the living quality of a patient can be improved, pain is eliminated for the patient, the medial single-compartment knee joint replacement is a mature operation, the success or failure of the operation is influenced by various factors, such as the selection of the prosthesis, the accuracy of operation skills and the like, and particularly, the requirement on the operation skills is more prominent, such as accurate osteotomy in a three-dimensional space.
In order to be able to accurately position, the osteotomy template which is usually used at present is an osteotomy template formed by a 3D rapid prototyping technology, and the osteotomy template formed by the 3D rapid prototyping technology can be more intuitively and accurately positioned. However, on the one hand, when the osteotomy template prepared by utilizing the preoperative image data of the patient is used in the operation, the deviation of the osteotomy position of the osteotomy plate can be caused due to the existence of unclean soft tissues on the surface of the patient, and the accuracy of osteotomy can be influenced.
On the other hand, the osteotomy template molded by the 3D rapid prototyping technology is usually made of a polymer material, the structural strength of the osteotomy template is low, when an osteotomy operation is performed, a saw blade is extremely easy to damage the template when running in an osteotomy groove, so that the osteotomy accuracy is reduced, and even osteotomy errors are caused, and additional pain is caused to a patient.
The above information disclosed in the background section is only for enhancement of understanding of the background of the invention.
Disclosure of Invention
It is a primary object of the present invention to overcome at least one of the above-mentioned shortcomings of the prior art by providing a tibial unicondylar osteotomy device for accurately positioning an osteotomy plate to improve the accuracy of the tibial osteotomy.
Another primary object of the present invention is to overcome at least one of the above-mentioned drawbacks of the prior art, and to provide a tibial unicondylar osteotomy device with a higher structural strength, further improving the accuracy of the tibial osteotomy.
In order to achieve the aim of the invention, the invention adopts the following technical scheme:
according to one aspect of the present invention, there is provided a tibial unicondylar osteotomy device comprising an osteotomy plate having an osteotomy groove disposed thereon, a guide plate, and a connection structure; the guide plate comprises a first surface, wherein the first surface is matched with the tibia platform and is used for positioning the tibia unicondylar osteotomy device; the connecting structure comprises a first connecting piece and a second connecting piece, wherein the first connecting piece is slidably arranged on the second connecting piece, the first connecting piece is fixed on the guide plate, and the second connecting piece is fixedly arranged on the osteotomy plate.
According to an embodiment of the present invention, the first connecting piece is a sliding block, the second connecting piece has a sliding groove matched with the sliding block, and the sliding block is slidably disposed in the sliding groove.
According to an embodiment of the present invention, the connecting structure further includes a cam shaft, the cam shaft includes a rotating shaft body and a cam disposed on an end surface of the rotating shaft body, a center line of the cam is parallel to a center line of the rotating shaft body, a long waist hole is disposed on the slider, and the long waist hole is matched with the cam, so that the cam moves in a long shaft direction of the long waist hole; an included angle is formed between the long axis direction and the extending direction of the sliding groove; the second connecting piece is provided with a shaft hole, the shaft hole is matched with the rotating shaft body, so that the rotating shaft body can be rotatably arranged in the shaft hole, the central line of the shaft hole is perpendicular to the long shaft direction, and the central line of the shaft hole is perpendicular to the extending direction of the sliding groove.
According to an embodiment of the present invention, the extending direction of the chute is perpendicular to the long axis direction of the long waist hole.
According to an embodiment of the present invention, the sliding groove is a dovetail groove.
According to an embodiment of the present invention, the rotating shaft body is a stepped shaft, the stepped shaft includes a first shaft portion and a second shaft portion coaxially disposed, the shaft diameter of the first shaft portion is larger than that of the second shaft portion, the second shaft portion is disposed on one end face of the first shaft portion, and the cam is eccentrically disposed on the other end face of the first shaft portion opposite to the one end face; the shaft hole is a stepped hole matched with the stepped shaft.
According to an embodiment of the present invention, an end of the second shaft portion facing away from the first shaft portion is a free end, and a cam shaft adjusting portion is provided on the free end, and the cam shaft adjusting portion is formed by protruding an end face of the free end outward or by recessing an end face of the free end inward.
According to an embodiment of the invention, a plurality of rotation positioning parts are arranged on the end face, facing away from the guide plate, of the shaft hole, the rotation positioning parts are uniformly distributed on the periphery of the shaft hole, and an indication part is arranged on the free end of the second shaft part and rotates along with the cam shaft so as to indicate different rotation positioning parts.
According to an embodiment of the present invention, the connecting structure further includes an elastic member sleeved on the outer periphery of the second shaft portion, and the elastic member is compressed between the stepped hole and the first shaft portion.
According to an embodiment of the present invention, the osteotomy groove has a first direction osteotomy groove, the tibial unicondylar osteotomy device further includes a first limiting member, a first limiting hole matched with the first limiting member is provided on the guide plate, the first limiting hole is located in an extension plane of the first direction osteotomy groove, and the first limiting member is disposed in the first limiting hole for limiting a first direction osteotomy depth.
According to an embodiment of the present invention, the osteotomy groove has a second direction osteotomy groove, the tibial unicondylar osteotomy device further includes a second limiting member, the osteotomy plate is provided with a second limiting hole matched with the second limiting member, the second limiting hole is located in an extension plane of the second direction osteotomy groove, and the second limiting member is disposed in the second limiting hole for limiting the second direction osteotomy depth.
According to an embodiment of the invention, the first direction osteotomy groove is perpendicular to the second direction osteotomy groove.
According to one embodiment of the present invention, the tibial unicondylar osteotomy device further comprises an osteotomy plate positioning structure, wherein the osteotomy plate is provided with positioning holes matching the osteotomy plate positioning structure.
According to an embodiment of the present invention, the guide plate is provided with a fixing portion, the first connecting member is fixed on the fixing portion, the fixing portion is plural, and the fixing portions are arranged in a direction perpendicular to a sliding direction of the first connecting member; or the osteotomy plate is provided with a fixing part, the second connecting piece is fixed on the fixing part, the fixing parts are multiple, and the fixing parts are arranged in the vertical direction of the sliding direction of the first connecting piece.
According to the technical scheme, the tibial unicondylar osteotomy device has the advantages and positive effects that: the tibial unicondylar osteotomy device comprises a connecting structure, wherein the connecting structure further comprises a first connecting piece and a second connecting piece which are respectively fixed on the guide plate and the osteotomy plate, and the first connecting piece is slidably arranged on the second connecting piece, so that the osteotomy plate can move relative to the guide plate to realize position adjustment of the osteotomy plate, thereby realizing accurate positioning of the osteotomy plate. Further, a plurality of fixing portions are provided on one of the guide plate and the osteotomy plate in a direction perpendicular to a sliding direction of the first connector, so that the osteotomy plate can be positioned at different positions of the guide plate to accurately position the osteotomy plate. Furthermore, the guide plate and/or the osteotomy plate are/is provided with a limiting piece to limit the osteotomy depth, so that the accuracy of osteotomy can be well controlled.
Drawings
Various objects, features and advantages of the present invention will become more apparent from the following detailed description of the preferred embodiments of the invention, when taken in conjunction with the accompanying drawings. The drawings are merely exemplary illustrations of the invention and are not necessarily drawn to scale. In the drawings, like reference numerals refer to the same or similar parts throughout. Wherein:
fig. 1 is a partial cross-sectional view of a tibial unicondylar osteotomy device, shown in accordance with an exemplary embodiment.
Fig. 2 is a block diagram of the tibial unicondylar osteotomy device of fig. 1 mated to a tibial plateau.
FIG. 3 is an exploded view of the guide plate and attachment structure of FIG. 1.
Fig. 4 is a separation view of the guide plate and the osteotomy plate of the tibial unicondylar osteotomy device of fig. 1.
Wherein reference numerals are as follows:
1. an osteotomy plate; 11. A first-direction osteotomy groove;
12. a second direction osteotomy groove; 13. A chute;
14. a stepped hole; 15. A second limiting hole;
16. positioning holes; 17. A rotation positioning part;
2. a guide plate; 21. A first surface;
22. a first limiting hole; 23. A fixing part;
3. a cam shaft; 31. A cam;
32. a first shaft portion; 33. A second shaft portion;
34. a camshaft adjuster; 4. A slide block;
41. a long waist hole; 5. An elastic member;
6. a second limiting piece; 7. A first limiting member;
Detailed Description
Example embodiments will now be described more fully with reference to the accompanying drawings. However, the exemplary embodiments can be embodied in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus detailed descriptions thereof will be omitted.
According to one aspect of the present invention, there is provided a tibial unicondylar osteotomy device comprising an osteotomy plate 1, a guide plate 2, and a connection structure, wherein the connection structure comprises a first connector and a second connector fixed to the guide plate 2 and the osteotomy plate 1, respectively, and the first connector is slidably disposed on the second connector, so that the osteotomy plate 1 can be moved relative to the guide plate 2 to adjust the position of the osteotomy plate 1, thereby achieving accurate positioning of the osteotomy plate 1. According to an embodiment of the present invention, a plurality of fixing portions 23 are provided on one of the guide plate 2 and the osteotomy plate 1 in a direction perpendicular to the sliding direction of the first connector, so that the osteotomy plate 1 can be positioned at different positions of the guide plate 2 to accurately position the osteotomy plate 1. According to another embodiment of the present invention, the guide plate 2 and/or the osteotomy plate 1 are provided with a limiting member to limit the depth of the osteotomy, so that the accuracy of the osteotomy can be well controlled. According to an embodiment of the present invention, the osteotomy plate 1 may be made of a metal material, and has a higher structural strength than the existing osteotomy plate made of a polymer material, so that the damage of the osteotomy plate 1 caused by the saw blade during the operation can be prevented, and the life of the osteotomy plate 1 is prolonged.
Fig. 1 is a partial cross-sectional view of a tibial unicondylar osteotomy device, shown in accordance with an exemplary embodiment. Fig. 2 is a block diagram of the tibial unicondylar osteotomy device of fig. 1 mated to a tibial plateau. FIG. 3 is an exploded view of the guide plate and attachment structure of FIG. 1. Fig. 4 is a separation view of the guide plate and the osteotomy plate of the tibial unicondylar osteotomy device of fig. 1.
Referring to fig. 1 to 4, according to an embodiment of the present invention, the connection structure may include a first connection member and a second connection member fixed to the guide plate 2 and the osteotomy plate 1, respectively, and by slidably disposing the first connection member on the second connection member, the osteotomy plate 1 may be moved relative to the guide plate 2 to achieve position adjustment of the osteotomy plate 1, thereby achieving accurate positioning of the osteotomy plate 1. According to another embodiment of the invention, wherein the first connection member may be a slide 4, the second connection member may have a slide groove 13 matching the slide 4, the slide 4 being slidably arranged in the slide groove 13. According to an embodiment of the present invention, the sliding groove 13 may be a dovetail groove, but not limited thereto, and the sliding groove 13 may be any structural form according to practical needs, which is within the scope of the present invention.
With continued reference to fig. 1-4, according to an embodiment of the present invention, the connection structure may further include a cam shaft 3, the cam shaft 3 may include a cam 31, a second shaft portion 33, and a first shaft portion 32 therebetween, the first shaft portion 32 may include opposite one end face and the other end face, the second shaft portion 33 may be disposed on one end face of the first shaft portion 32, and the cam 31 may be disposed on the other end face. According to an embodiment of the present invention, wherein the cam 31 may be a shaft-type structure, the shaft-type structure may have a central axis, wherein the central axis of the cam 31 is parallel to the central axis of the first shaft portion 32. According to an embodiment of the present invention, the shaft diameter of the cam 31 may be smaller than the shaft diameter of the first shaft portion 32. According to an embodiment of the present invention, the shaft diameter of the first shaft portion 32 may be larger than the shaft diameter of the second shaft portion 33 for ease of assembly. The first shaft portion 32 and the second shaft portion 33 may be concentrically arranged to form a shaft body. Based on this, the second connecting member may have a shaft hole thereon, and the shaft hole may be matched with the rotating shaft body, so that the rotating shaft body is rotatably disposed in the shaft hole, and the shaft hole on the second connecting member may be a stepped hole 14 matched with the camshaft 3. According to an embodiment of the present invention, the center line of the shaft hole may be perpendicular to the long axis direction, and the center line of the shaft hole may be perpendicular to the extending direction of the chute 13.
With continued reference to fig. 1 to 4, according to an embodiment of the present invention, the slider 4 may be provided with a long waist hole 41, and the long waist hole 41 may be matched with the cam 31 of the cam shaft 3 such that the cam 31 can move in the long axis direction of the long waist hole 41. According to an embodiment of the present invention, an included angle may be formed between the long axis direction of the long waist hole 41 and the extending direction of the chute 13, and the size of the included angle may be selected according to the actual working condition, which is within the scope of the present invention.
With continued reference to fig. 1-4, in accordance with an embodiment of the present invention, the long axis direction of the long waist hole 41 may be perpendicular to the extending direction of the chute 13.
With continued reference to fig. 1 to 4, according to an embodiment of the present invention, an end of the second shaft portion 33 facing away from the first shaft portion 32 is a free end, and a cam shaft adjusting portion 34 may be disposed on the free end, and the cam shaft adjusting portion 34 is formed by protruding an end surface of the free end outward or by recessing an end surface of the free end inward. The camshaft adjuster 34 may have a shape that is convenient to operate to rotate the camshaft 3, for example, but not limited to, the camshaft adjuster 34 may have a cross-shaped or a straight-shaped, or a geometric shape such as a triangle, a rectangle, a regular hexagon, or a letter shape such as an X-shape, a Y-shape, or other shapes, for example, but not limited to, a quincuncial shape, and is within the scope of the present invention.
With continued reference to fig. 1 to 4, according to an embodiment of the present invention, the end surface of the shaft hole facing away from the guide plate 2 is provided with a plurality of rotation positioning portions 17, the rotation positioning portions 17 may be distributed uniformly on the outer circumference of the shaft hole, and the free end of the second shaft portion 33 may be provided with an indicating portion, which may rotate along with the cam shaft 3 to indicate different rotation positioning portions 17. The rotation positioning portion 17 may have a geometric shape, for example, but not limited to, the rotation positioning portion 17 may be a groove or a protrusion extending reversely along a radial direction of the shaft hole, and may also be a groove or a protrusion having a circular shape, a triangular shape, a rectangular shape or other geometric shapes, which is within the scope of the present invention. The indication part may be a groove or a protrusion with a circular shape, a triangular shape, a rectangular shape or other geometric shapes, but the invention is not limited thereto, and the indication part is within the protection scope of the invention.
With continued reference to fig. 1 to 4, according to an embodiment of the present invention, the connecting structure may further include an elastic member 5 sleeved on the outer periphery of the second shaft portion 33. According to an embodiment of the invention, the elastic member 5 may be a spring assembly, which may comprise a spring or a plurality of springs. According to an embodiment of the invention, the resilient member 5 may be compressed between the stepped bore 14 and the first shaft portion 32.
With continued reference to fig. 1-4, in accordance with an embodiment of the present invention, wherein the tibial unicondylar osteotomy device may further include an osteotomy plate positioning structure, the osteotomy plate 1 may be provided with a positioning hole 16 that mates with the osteotomy plate positioning structure. According to one embodiment of the present invention, the bone plate positioning structure may be a rod-shaped positioning member, such as, but not limited to, a bone screw, and the cross-sectional shape of the positioning member may be circular, rectangular, triangular or other structural shape, which is within the scope of the present invention.
With continued reference to fig. 1-4, in accordance with an embodiment of the present invention, an osteotomy groove may be provided on osteotomy plate 1. According to an embodiment of the present invention, the osteotomy grooves may include a first direction osteotomy groove 11 and a second direction osteotomy groove 12 disposed at an angle to each other, for example, but not limited to, according to an embodiment of the present invention, the first direction osteotomy groove 11 is disposed perpendicular to the second direction osteotomy groove 12, the first direction osteotomy groove 11 is disposed along a cross section of a human body, the second direction osteotomy groove 12 is disposed along a sagittal plane of the human body, the first direction osteotomy groove 11 extends from a medial side or a lateral side of the tibia toward a middle of the bone, the second direction osteotomy groove 12 extends from top to bottom, and the first direction osteotomy groove 11 and the second direction osteotomy groove 12 finally cross-merge to form an L-shaped groove. But is not limited thereto. According to the actual osteotomy requirement, the first direction osteotomy groove 11 and the second direction osteotomy groove 12 may form any angle, for example, but not limited to, the angle may be an angle with 15 ° step increase, such as 0 °, 15 °, 30 °, 45 °, 60 °, 75 °, 90 °, etc., and may also be other angles, which are all within the scope of the present invention. In the case where the angle between the first-direction osteotomy groove 11 and the second-direction osteotomy groove 12 is 0 °, the first-direction osteotomy groove 11 is parallel to the second-direction osteotomy groove 12.
With continued reference to fig. 1-4, in accordance with an embodiment of the present invention, the tibial unicondylar osteotomy device may further include a second stop 6, and the osteotomy plate 1 may be provided with a second stop aperture 15 mated to the second stop 6, the second stop aperture 15 extending below the second directional osteotomy slot 12 when the second directional osteotomy slot 12 is positioned along the sagittal plane of the body. The second limiting hole 15 is arranged, the plane of the second-direction osteotomy groove 12 is taken as a reference, the first-direction osteotomy groove 11 is positioned at one side of the second-direction osteotomy groove 12, and the second limiting hole 15 is positioned at the other side opposite to the first-direction osteotomy groove 11; or the second direction osteotomy groove 12 is positioned at one side of the first direction osteotomy groove 11 by taking the plane of the first direction osteotomy groove 11 as a reference, and the second limit hole 15 is positioned at the opposite side of the second direction osteotomy groove 12. The arrangement is such that the second limiting member 6 inserted into the second limiting hole 15 does not interfere with the osteotomy in the first direction while limiting the osteotomy in the second direction. As a preferred embodiment, the second limiting member 6 is inserted into the second limiting hole 15, and when the saw blade is inserted into the second-direction osteotomy groove 12 in a manner that the lower edge of the saw blade is clung to the second-direction osteotomy groove 12 and perpendicular to the coronal plane, the upper edge of the second limiting member 6 is abutted against the lower edge of the saw blade, so that the problem that the saw blade cuts too much due to downward swinging when the saw blade reaches the lower edge of the second-direction osteotomy groove 12 is prevented. As a further preferred embodiment, the second limiting member 6 is inserted into the second limiting hole 15, and the second limiting member 6 simultaneously abuts against the saw blade when the edge of the saw blade on the side of the middle of the bone, which is close to the osteotomy groove 11 in the first direction, is inserted perpendicular to the coronal plane. By this arrangement, when the saw blade is cutting the bone in the second direction, i.e. from top to bottom, in the second direction cutting slot 12, when the saw blade reaches the lower edge of the second direction cutting slot 12, the saw blade is in contact with the second limiting member 6, the second limiting member 6 can limit the second direction cutting depth, and simultaneously when the saw blade is cutting the bone in the first direction, i.e. from the inner side or the outer side of the bone to the middle of the bone, in the first direction cutting slot 11, when the saw blade reaches the edge of the first direction cutting slot 11 located at one side of the middle of the bone, the saw blade is also in contact with the second limiting member 6, and the second limiting member 6 can limit the first direction cutting depth.
With continued reference to fig. 1-4, in accordance with an embodiment of the present invention, the guide plate 2 may include a first surface 21 that mates with the tibial plateau, i.e., the first surface 21 mates completely with the tibial plateau, and the guide plate 2 may be accurately positioned, thereby allowing for accurate positioning of the tibial unicondylar osteotomy device.
With continued reference to fig. 1-4, in accordance with an embodiment of the present invention, the tibial unicondylar osteotomy device may further include a first stop 7, the guide plate 2 may further be provided with a first stop hole 22 matching the first stop 7, and when the first-direction osteotomy groove 11 is disposed along a cross-section of the human body, an extension portion of the first stop hole 22 may be located in an extension plane of the first-direction osteotomy groove 11, and the first stop 7 may be disposed in the first stop hole 22 for limiting a depth of the first-direction osteotomy. That is, the first limiting member 7 may be located in the extending direction of the osteotomy groove 11 in the first direction to limit the osteotomy depth of the osteotomy knife, so as to protect the posterior tibia, for example, but not limited to, limit the osteotomy depth of the saw blade to the posterior tibia to protect the posterior tibial ligament. According to an embodiment of the present invention, the cross section of the first limiting member 7 may be circular or rectangular, or may have other geometric shapes, which is within the scope of the present invention. According to an embodiment of the present invention, the material of the first limiting member 7 may be selected according to actual needs, which is within the scope of the present invention. As a preferred embodiment, the first limiting hole 22 is disposed at a position, based on the plane of the first-direction osteotomy groove 11, where the second-direction osteotomy groove 12 is located on one side of the first-direction osteotomy groove 11, and the first limiting hole 22 is located on the other side opposite to the second-direction osteotomy groove 12; or the plane of the second-direction osteotomy groove 12 is taken as a reference, the first-direction osteotomy groove 11 is positioned at one side of the second-direction osteotomy groove 12, and the second limiting hole 15 is positioned at the same side as the first-direction osteotomy groove 11. The arrangement is such that the first limiting member 7 inserted into the first limiting hole 22 does not interfere with the osteotomy in the second direction while limiting the depth of the osteotomy in the first direction. As a preferred embodiment, the first limiting hole 22 may be disposed on the transverse plane of the tibia as well, and is located in the same plane as the first-direction osteotomy groove 11, the first limiting hole has a height slightly greater than the first-direction osteotomy groove in the sagittal plane, the first limiting member 7 has a height identical or substantially identical to the first-direction osteotomy groove in the sagittal plane, and when the first limiting member 7 is inserted into the first limiting hole 22, the first limiting member 7 extends to the rear of the first-direction osteotomy groove 11, so as to be suitable for limiting the osteotomy depth in the first direction, and as a further preferred embodiment, the first limiting member 7 may simultaneously extend to the rear of the second-direction osteotomy groove 12, and is suitable for limiting the osteotomy depth in the second direction while limiting the osteotomy depth in the first direction.
With continued reference to fig. 1 to 4, according to an embodiment of the present invention, the guide plate 2 may be provided with a fixing portion 23, the first connector may be fixed to the fixing portion 23, the fixing portion 23 may be plural, and the fixing portion 23 may be disposed in a direction perpendicular to a sliding direction of the first connector. According to an embodiment of the present invention, the fixing portion 23 may be a fixing hole, the first connecting member may be a slider 4, and the slider 4 may be provided with a protrusion portion matching the fixing hole so that the osteotomy plate 1 may be fixed to the guide plate 2 by inserting the protrusion portion into the fixing hole. According to an embodiment of the present invention, the fixing portion 23 may be a protrusion, and in this case, a fixing hole may be formed in the slider 4, so that the bone cutting plate 1 may be fixed to the guide plate 2 by inserting the protrusion into the fixing hole, which is within the scope of the present invention. According to an embodiment of the present invention, the fixing portion 23 may be plural, and the plural fixing portions 23 may be arranged in a direction perpendicular to the sliding direction of the slider 4 to adjust the position of the osteotomy plate 1 in the direction perpendicular to the sliding direction by fixing the slider 4 to different fixing portions 23.
According to an embodiment of the present invention, the second shaft portion 33 may be rotated by the camshaft adjusting portion 34, thereby rotating the entire camshaft 3. Because the guide plate 2 is fixed at the tibial plateau, the cam 31 can only move along the long axis direction in the long waist hole 41, and drives the osteotomy plate 1 to move along the direction perpendicular to the long waist hole 41, so as to realize adjustment, even fine adjustment, of the osteotomy plate 1. The tibial unicondylar osteotomy device has the advantages of simple structure, reduced manufacturing cost, accurate positioning and improved positioning efficiency and operation quality.
According to particular embodiments of the present invention, particular steps of assembling a tibial unicondylar osteotomy device may include: firstly, the elastic piece 5 is sleeved on the outer periphery of the second shaft part 33 during installation, and then the second shaft part 33 is inserted into the shaft hole; secondly, inserting the slider 4 into the dovetail groove; again, the second shaft portion 33 is pressed so as to press the elastic member 5 so as not to interfere with the movement of the slider 4 in the dovetail groove; again, when the slider 4 passes through the shaft hole, the pressing of the second shaft portion 33 is stopped, and the cam 31 is pressed against the side surface of the slider 4 by the reverse force of the elastic member 5 until it moves into the long waist hole 41, and the cam 31 is inserted into the long waist hole 41 by the reverse force of the elastic member 5, thereby completing the assembly.
In use, a tool such as, but not limited to, a screwdriver can be inserted into the cam shaft adjusting portion 34 of the second shaft portion 33, the screwdriver is rotated, the cam shaft 3 starts to rotate, and the cam 31 moves in the long axis direction of the long waist hole 41, so that the osteotomy plate 1 is driven to move along the extending direction of the sliding groove 13 to realize the fine adjustment of the osteotomy plate 1. The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the above description, numerous specific details are provided to give a thorough understanding of embodiments of the invention. One skilled in the relevant art will recognize, however, that the inventive aspects may be practiced without one or more of the specific details, or with other methods, components, materials, and so forth. In other instances, well-known structures, materials, or operations are not shown or described in detail to avoid obscuring aspects of the invention.
Claims (10)
1. A tibial unicondylar osteotomy device, the tibial unicondylar osteotomy device comprising:
an osteotomy plate, on which an osteotomy groove is provided;
a guide plate comprising a first surface that mates with a unilateral plateau of a tibia for positioning the tibial unicondylar osteotomy device;
the connecting structure comprises a first connecting piece and a second connecting piece, the first connecting piece is slidably arranged on the second connecting piece, the first connecting piece is fixed on the guide plate, and the second connecting piece is fixedly arranged on the osteotomy plate; the first connecting piece is a sliding block, the second connecting piece is provided with a sliding groove matched with the sliding block, and the sliding block is slidably arranged in the sliding groove; the connecting structure further comprises a cam shaft, the cam shaft comprises a rotating shaft body and a cam arranged on the end face of the rotating shaft body, the central line of the cam is parallel to the central line of the rotating shaft body, a long waist hole is formed in the sliding block, and the long waist hole is matched with the cam, so that the cam moves in the long shaft direction of the long waist hole; an included angle is formed between the long axis direction and the extending direction of the sliding groove; the second connecting piece is provided with a shaft hole, the shaft hole is matched with the rotating shaft body, so that the rotating shaft body can be rotatably arranged in the shaft hole, the central line of the shaft hole is perpendicular to the long shaft direction, and the central line of the shaft hole is perpendicular to the extending direction of the sliding groove.
2. The tibial unicondylar osteotomy device of claim 1, wherein the chute extends in a direction perpendicular to a long axis of the long lumbar hole.
3. The tibial unicondylar osteotomy device of claim 2, wherein the shaft body is a stepped shaft comprising a first shaft portion and a second shaft portion coaxially disposed, the first shaft portion having a larger shaft diameter than the second shaft portion, the second shaft portion disposed on one end face of the first shaft portion, the cam eccentrically disposed on the other end face of the first shaft portion opposite the one end face; the shaft hole is a stepped hole matched with the stepped shaft.
4. The tibial unicondylar osteotomy device of claim 3, wherein the end of the second shaft portion facing away from the first shaft portion is a free end, and wherein a cam shaft adjustment portion is disposed on the free end, the cam shaft adjustment portion being formed by an outward projection of an end surface of the free end or by an inward depression of an end surface of the free end.
5. The tibial unicondylar osteotomy device of claim 3, wherein the shaft hole is provided with a plurality of rotation positioning portions on an end surface facing away from the guide plate, the rotation positioning portions are uniformly distributed on the periphery of the shaft hole, and the free end of the second shaft portion is provided with an indication portion which rotates along with the cam shaft to indicate different rotation positioning portions.
6. The tibial unicondylar osteotomy device of claim 3, wherein the connection structure further comprises an elastic member disposed about the outer periphery of the second shaft portion, the elastic member being compressed between the stepped bore and the first shaft portion.
7. The tibial unicondylar osteotomy device of any of claims 1-6, wherein the osteotomy slot has a first directional osteotomy slot, the tibial unicondylar osteotomy device further comprising a first stop, the guide plate having a first stop hole disposed thereon that mates with the first stop, the first stop hole being disposed in an extension plane of the first directional osteotomy slot, the first stop being disposed in the first stop hole for limiting a first directional osteotomy depth.
8. The tibial unicondylar osteotomy device of claim 7, wherein the osteotomy slot has a second-direction osteotomy slot, the second-direction osteotomy slot being perpendicular to the first-direction osteotomy slot; the tibial unicondylar osteotomy device further comprises a second limiting part, a second limiting hole matched with the second limiting part is formed in the osteotomy plate, the second limiting hole is located in the extension plane of the second-direction osteotomy groove, and the second limiting part is arranged in the second limiting hole and used for limiting the second-direction osteotomy depth.
9. The tibial unicondylar osteotomy device of any of claims 1 to 6, further comprising an osteotomy plate positioning structure, the osteotomy plate having a positioning hole disposed thereon that mates with the osteotomy plate positioning structure.
10. The tibial unicondylar osteotomy device of any of claims 1 to 6, wherein the guide plate is provided with a plurality of fixing portions, the first connector being fixed to the fixing portions, the plurality of fixing portions being arranged in a direction perpendicular to a sliding direction of the first connector; or the osteotomy plate is provided with a fixing part, the second connecting piece is fixed on the fixing part, the fixing parts are multiple, and the fixing parts are arranged in the vertical direction of the sliding direction of the first connecting piece.
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| CN201710352961.2A CN107007319B (en) | 2017-05-18 | 2017-05-18 | Tibia unicondylar osteotomy device |
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| CN107595355B (en) * | 2017-09-20 | 2020-11-06 | 鹤壁市人民医院 | Orthopedics is with thighbone distal end osteotomy device and positioner thereof |
| CN110301958B (en) * | 2018-03-27 | 2022-05-20 | 苏州微创关节医疗科技有限公司 | Osteotomy device |
| CN110393571B (en) * | 2019-06-24 | 2021-01-15 | 北京积水潭医院 | Osteotomy guiding device for unicompartmental knee replacement |
| CN111616771A (en) * | 2020-06-28 | 2020-09-04 | 经纬医疗器材制造（深圳）有限公司 | Adjustable bone cutter |
| CN112155652A (en) * | 2020-09-28 | 2021-01-01 | 北京市春立正达医疗器械股份有限公司 | Adjustable osteotomy guider |
| CN112754594A (en) * | 2021-01-21 | 2021-05-07 | 北京力达康科技有限公司 | Single-side lead screw adjusting type bone cutting device for femoral condyle |
| CN112754595A (en) * | 2021-01-21 | 2021-05-07 | 北京力达康科技有限公司 | Single-side eccentric adjustment type osteotomy device for femoral condyle |
| CN112932606B (en) * | 2021-01-29 | 2021-10-22 | 北京市春立正达医疗器械股份有限公司 | Adjustable tibia osteotomy guider |
| US20220265288A1 (en) * | 2021-02-24 | 2022-08-25 | Wright Medical Technology, Inc. | Cut guide, systems, and methods |
| CN117481742B (en) * | 2023-12-29 | 2024-04-30 | 北京爱康宜诚医疗器材有限公司 | Tibia side guide plate and ankle joint guide plate assembly with tibia side guide plate |
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