CN113069248A - Bone defect repair system for wrist joint - Google Patents
Bone defect repair system for wrist joint Download PDFInfo
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- CN113069248A CN113069248A CN202110523147.9A CN202110523147A CN113069248A CN 113069248 A CN113069248 A CN 113069248A CN 202110523147 A CN202110523147 A CN 202110523147A CN 113069248 A CN113069248 A CN 113069248A
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- prosthesis
- radius
- distal
- wrist joint
- ulnar
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- 210000003857 wrist joint Anatomy 0.000 title claims abstract description 61
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- 230000007547 defect Effects 0.000 title claims abstract description 29
- 230000008439 repair process Effects 0.000 title claims abstract description 23
- 238000009940 knitting Methods 0.000 claims abstract description 9
- 210000000623 ulna Anatomy 0.000 claims description 42
- 210000000707 wrist Anatomy 0.000 claims description 7
- 239000003351 stiffener Substances 0.000 claims 1
- 210000000236 metacarpal bone Anatomy 0.000 abstract description 6
- 238000011084 recovery Methods 0.000 abstract description 3
- 241000276425 Xiphophorus maculatus Species 0.000 abstract description 2
- 230000009286 beneficial effect Effects 0.000 description 5
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- 239000011148 porous material Substances 0.000 description 5
- 210000002435 tendon Anatomy 0.000 description 5
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- 230000002349 favourable effect Effects 0.000 description 2
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- 238000000034 method Methods 0.000 description 2
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- 206010028980 Neoplasm Diseases 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 206010037802 Radius fracture Diseases 0.000 description 1
- 206010003246 arthritis Diseases 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 210000003811 finger Anatomy 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 239000007943 implant Substances 0.000 description 1
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- 208000014674 injury Diseases 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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- 230000035790 physiological processes and functions Effects 0.000 description 1
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- 210000003813 thumb Anatomy 0.000 description 1
- 230000008733 trauma Effects 0.000 description 1
Images
Classifications
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2/42—Joints for wrists or ankles; for hands, e.g. fingers; for feet, e.g. toes
- A61F2/4261—Joints for wrists or ankles; for hands, e.g. fingers; for feet, e.g. toes for wrists
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/28—Bones
- A61F2002/2835—Bone graft implants for filling a bony defect or an endoprosthesis cavity, e.g. by synthetic material or biological material
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/28—Bones
- A61F2002/2871—Radius
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/28—Bones
- A61F2002/2896—Ulna
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
- A61F2002/30003—Material related properties of the prosthesis or of a coating on the prosthesis
- A61F2002/30004—Material related properties of the prosthesis or of a coating on the prosthesis the prosthesis being made from materials having different values of a given property at different locations within the same prosthesis
- A61F2002/30011—Material related properties of the prosthesis or of a coating on the prosthesis the prosthesis being made from materials having different values of a given property at different locations within the same prosthesis differing in porosity
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2/42—Joints for wrists or ankles; for hands, e.g. fingers; for feet, e.g. toes
- A61F2/4261—Joints for wrists or ankles; for hands, e.g. fingers; for feet, e.g. toes for wrists
- A61F2002/4264—Joints for wrists or ankles; for hands, e.g. fingers; for feet, e.g. toes for wrists for radio-carpal joints
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2/42—Joints for wrists or ankles; for hands, e.g. fingers; for feet, e.g. toes
- A61F2/4261—Joints for wrists or ankles; for hands, e.g. fingers; for feet, e.g. toes for wrists
- A61F2002/4266—Joints for wrists or ankles; for hands, e.g. fingers; for feet, e.g. toes for wrists for ulno-carpal joints
Abstract
The application discloses a bone defect repair system of a wrist joint, which comprises a distal radius prosthesis and a radial articular surface prosthesis; the first end of the body of the distal radius prosthesis is provided with a platy radius bone-knitting part extending along the long axis direction of the body, the radius bone-knitting part is provided with a plurality of radius connecting holes, and the end part of the second end of the body of the distal radius prosthesis is provided with a first limiting groove; a first end of the radius articular surface prosthesis is provided with a protruded first limiting block, and the first limiting block is arranged in the first limiting groove; the second end surface of the radial articular surface prosthesis is a radial articular surface. The radial joint surface and the metacarpal bone of the wrist joint recovery device form a wrist joint part corresponding to the radius together, the geometrical form of the wrist joint recovery device is the same as that of the joint surface of an anatomical wrist joint, and the function and the mobility of the wrist joint can be recovered.
Description
Technical Field
The application relates to the technical field of medical instruments, in particular to a bone defect repair system for a wrist joint.
Background
The wrist joint is also called radial wrist joint, which is a typical oval joint. The wrist joint is composed of the proximal joint surfaces of the scaphoid, lunate and triquetrum of the hand as joint heads, and the wrist joint surface of the radius and the joint disc below the ulnar head as joint sockets. The radius and ulna are the two bones of the forearm, with the radius lying on the outside of the forearm, i.e. on the side of the thumb. The ulna is located on the medial side of the forearm, i.e., on the side of the pinky finger.
The bone defects of the wrist joint caused by infection, trauma, arthritis, rheumatism or tumor and the like seriously affect the labor capacity and the life quality of the patient. However, the wrist joint prosthesis in the market at present is a conventional prosthesis, which generally has a ball and socket structure, and the prosthesis is only stabilized by the ball and socket structure, and the metacarpal side prosthesis and the metacarpal bone are fused, so that the function and the mobility of the wrist joint cannot be completely recovered.
In addition, the ball-and-socket wrist joint prosthesis is not suitable for large-segment bone defect diseases of radius and ulna.
Disclosure of Invention
The application provides a bone defect repair system for a wrist joint, wherein a radial joint surface and a metacarpal bone jointly form a wrist joint part corresponding to a radius, the geometrical form of the wrist joint part is the same as that of an anatomical wrist joint, and the function and the mobility of the wrist joint can be recovered.
The application provides a bone defect repair system of a wrist joint, which comprises a distal radius prosthesis and a radial articular surface prosthesis; the first end of the body of the distal radius prosthesis is provided with a platy radius bone-knitting part extending along the long axis direction of the body, the radius bone-knitting part is provided with a plurality of radius connecting holes, and the end part of the second end of the body of the distal radius prosthesis is provided with a first limiting groove; a first end of the radius articular surface prosthesis is provided with a protruded first limiting block, and the first limiting block is arranged in the first limiting groove; the second end surface of the radial articular surface prosthesis is a radial articular surface.
Preferably, the end of the second end of the distal radius prosthesis is further provided with at least one set of first suture holes.
Preferably, the end of the first end of the body of the distal radius prosthesis is provided with a radius micropore.
Preferably, the suture part where the first suture hole is located is provided with a radial micropore.
Preferably, a first limiting hole is formed in the second end face of the body of the distal radius prosthesis, a protruding second limiting block is further arranged at the first end of the distal radius prosthesis, and the second limiting block is installed in the first limiting hole.
Preferably, the end of the first end of the body of the distal radius prosthesis is provided with a reinforcing rib.
Preferably, the bone defect repair system further comprises a distal ulna prosthesis and an ulnar facet prosthesis; the first end of the body of the ulna distal prosthesis is provided with a plate-shaped ulna bone-connecting part extending along the long axis direction of the body, the ulna bone-connecting part is provided with a plurality of ulna connecting holes, and the end surface of the second end of the body of the ulna distal prosthesis is provided with a second limiting hole; a protruding third limiting block is arranged at the first end of the ulnar joint surface prosthesis and is arranged in the second limiting hole; the second end surface of the ulnar joint surface prosthesis is an ulnar joint surface.
Preferably, a fourth limiting block is arranged on the side surface of the second end of the body of the ulna distal prosthesis; a second limiting groove is formed in the side face of the radial articular surface prosthesis, and a fourth limiting block is installed in the second limiting groove.
Preferably, the end of the second end of the body of the distal ulnar prosthesis is further provided with at least one set of second suture holes.
Preferably, the end of the first end of the body of the distal ulnar prosthesis and/or the suture portion where the second suture hole is located is provided with ulnar pores.
Further features of the present application and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which is to be read in connection with the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the application and together with the description, serve to explain the principles of the application.
FIG. 1 is a schematic illustration of a wrist bone defect repair system provided herein;
FIG. 2 is a perspective view of a distal radius prosthesis provided herein;
FIG. 3 is a perspective view of a radial articular surface prosthesis provided herein;
FIG. 4 is a perspective view of an ulnar distal prosthesis provided herein; FIG. 5 is a perspective view of an ulnar facet prosthesis provided in accordance with the present application.
The figures are labeled as follows:
10-distal radius prosthesis 11-radius fracture part 12-radius connecting hole
13-reinforcing rib 14-first limiting groove 15-first limiting hole
16-radius intramedullary nail 17-radius micropore 18-first suture hole
20-radius articular surface prosthesis 21-first limiting block 22-second limiting groove
23-radius articular surface 24-second limiting block 30-ulna distal prosthesis
31-ulna micropore 32-reinforcing rib 33-second limiting hole
34-fourth limiting block 35-ulna bone-setting part 36-ulna connecting hole
37-ulna medullary needle 38-second suture hole 40-ulna articular surface prosthesis
41-third limiting block 42-ulnar joint surface
Detailed Description
Various exemplary embodiments of the present application will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present application unless specifically stated otherwise.
The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the application, its application, or uses.
Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail, but are intended to be part of the specification where appropriate.
In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.
The application provides a bone defect repair system for a wrist joint, which can restore the natural anatomical form and the mobility of the wrist joint and reserve the ulnar joint through a radial joint surface and an ulnar joint surface which are the same as the joint surface of the wrist joint of a human body. The geometrical structure of the bone defect repair system is consistent with the anatomical geometrical shapes of the bone defect area of the wrist joint and the healthy lateral wrist joint, the defect filling of the large-section bones of the radius and the ulna of the wrist joint can be realized, the anatomical structure of the affected part can be restored, and the length of the affected part can be restored.
As shown in fig. 1, the wrist bone defect repair system includes a radial component and/or an ulnar component, and the patient may implant the radial component or the ulnar component separately or simultaneously as desired.
As shown in fig. 1, the radial assembly includes a distal radius prosthesis 10 and a radial articular surface prosthesis 20. As shown in fig. 1 and 2, the body of the distal radius prosthesis 10 has a cylindrical shape, and the circumferential dimension thereof gradually decreases from one end (referred to as a second end) near the articular surface of the wrist joint to one end (referred to as a first end) away from the articular surface of the wrist joint, and is substantially tapered. A plate-shaped radius bone-knitting part 11 extending along the long axis direction (namely the long axis direction of the radius of the human body) is arranged on the outer side surface of the first end of the body, a plurality of radius connecting holes 12 are arranged on the radius bone-knitting part 11, and a cortical bone screw penetrates through the radius connecting holes 12 to fix the radius bone-knitting part 11 and the radius of the human body together. The end of the second end of the body of the distal radius prosthesis 10 is provided with a first limiting groove 14, and the first limiting groove 14 has a first notch located on the end surface of the second end of the body of the distal radius prosthesis 10 and a second notch located on the tapered side surface of the body of the distal radius prosthesis 10. A first stop hole 15 is provided on the second end face of the body of the distal radius prosthesis 10.
Preferably, the end of the second end of the distal radius prosthesis 10 is further provided with at least one set of first suture holes 18, and the area around the first suture holes 18 forms a suture. As one example, each set of suture holes includes two pairs of suture holes (i.e., four suture holes in total) oppositely disposed on the conical side of the distal radius prosthesis 10 for suture to pass through the body and then return from the body. The first suture hole is used for suturing ligaments or tendons of the wrist joint, and is beneficial to keeping the mobility of the distal radius prosthesis and the connection stability of the distal radius prosthesis and the wrist joint.
Preferably, the end of the first end of the body of the distal radius prosthesis 10 is provided with a radius micro-hole 17. The tip of the first end of the body of distal radius prosthesis 10 contacts with the stub of radius, and the structure of the micropore of radius is for imitating cancellous bone structure, and it contacts with the bone tissue of stub, climbs to cover and grow into for bone tissue provides fine microenvironment, consequently the micropore of radius does benefit to climbing of the stub bone tissue of radius and covers and grow into.
As an example, the pore size of the radial micropores 17 is 500-700 μm on average, and the porosity is 60-80%.
Preferably, each suture is also provided with identical radial micropores 17 to facilitate the creeping and ingrowth of scar tissue around the ligament or tendon.
Preferably, the end of the first end of the body of the distal radius prosthesis 10 is provided with a reinforcing rib 13, so as to improve the strength of the distal radius prosthesis and provide a powerful support for the radius stump.
Preferably, as shown in fig. 2, a radial broach 16 extending in a direction away from the articular surface of the wrist joint is provided in the body of the distal radius prosthesis 10, and the radial broach 16 is inserted into the medullary cavity of the radius stump in the human body, which is beneficial to further establishing the stability of positioning and connection between the distal radius prosthesis and the radius.
As shown in fig. 3, a first end (an end facing the distal radius prosthesis 10) of the distal radius joint surface prosthesis 20 is provided with a protruding first stopper 21, and the first stopper 21 is installed in the first stopper groove 14, so that the radial relative movement of the distal radius prosthesis 10 and the distal radius joint surface prosthesis 20 is limited. The first end of the radius articular surface prosthesis 20 is further provided with a protruding second limiting block 24, the second limiting block 24 is installed in the first limiting hole 15, and the second limiting block 24 is connected and matched with the first limiting groove 14 and the first limiting block 21, so that the radial distal end prosthesis 10 and the radius articular surface prosthesis 20 are positioned in the radial direction. The second end surface of the radial articular surface prosthesis 20 is a radial articular surface 23, and the geometric structure (for example, the concave-convex part) of the radial articular surface 23 is the same as the anatomical form of the wrist joint of the human body. The side of the radial articular surface prosthesis 10 is provided with a second limit groove, which faces the ulnar distal prosthesis 30.
Preferably, as shown in FIGS. 2 and 3, the second stopper 24 has a frustum shape, and the first stopper hole 15 has a tapered shape, so that the distal radius prosthesis 10 and the radial articular surface prosthesis 20 can be positioned more accurately with respect to each other.
As shown in fig. 1 and 4, the body of the ulnar distal prosthesis 30 is cylindrical, and has a substantially conical shape in which the circumferential dimension thereof gradually decreases from one end (referred to as the second end) near the articular surface of the wrist joint to one end (referred to as the first end) away from the articular surface of the wrist joint. The outer side surface of the first end of the body is provided with a plate-shaped ulna bone-connecting part 35 extending along the long axis direction (namely the length direction of the radius of the human body), the ulna bone-connecting part 35 is provided with a plurality of ulna connecting holes 36, and cortical screws penetrate through the ulna connecting holes 36 to fix the ulna bone-connecting part 35 and the ulna of the human body. The end surface of the second end of the body of the ulnar distal prosthesis 30 is provided with a second limit hole 33. A fourth limiting block 34 is arranged on the end face of the second end of the ulna distal prosthesis 30, and the fourth limiting block 34 is installed in the second limiting groove, so that the ulna distal prosthesis 30 and the radius articular surface prosthesis 20 are in positioning connection in the axial direction to form an ulnar joint.
Preferably, the second limiting groove is disposed on a side surface of the first limiting block 21 (see reference numeral 22 in fig. 3). The distal radius prosthesis 10 and the radial articular surface prosthesis 20 are positioned mutually through the first limiting block 21, and meanwhile, the radius assembly and the ulna assembly are positioned, so that the overall structure of the bone defect repair system is more stable, and the ulna and radial joint is realized.
Preferably, the second retaining groove 22 is a dovetail groove, and the fourth retaining block 34 includes a post segment proximal to the body of the distal ulnar prosthesis 30 and a spherical tip distal to the body of the distal ulnar prosthesis 30, the spherical tip overlying the post segment, as shown in FIG. 4. The spherical top is favorable for preventing the fourth limiting block from being separated after the fourth limiting block enters the dovetail groove, and effectively prevents the ulnar and radial joint from dislocation.
Preferably, as shown in fig. 4, the end of the second end of the ulnar distal prosthesis 30 is further provided with at least one set of second suture holes 38, and the area around the second suture holes 38 forms a suture. The second suture hole is used for suturing ligaments or tendons of the wrist joint, and is beneficial to keeping the mobility of the ulna distal prosthesis and the connection stability of the ulna distal prosthesis and the wrist joint.
Preferably, the end of the first end of the body of the distal ulnar prosthesis 30 is provided with an ulnar pore 31. The tip of the first end of the body of ulna distal prosthesis 30 contacts with the stub of the ulna, and the structure of ulna micropores is a structure imitating cancellous bone, and the contact of the ulna tissue with the stub provides a good microenvironment for climbing and growing in the bone tissue, so that the ulna micropores are beneficial to climbing and growing in the ulna stub bone tissue.
Preferably, each suture is also provided with identical ulnar microholes 31 to facilitate the passage and ingrowth of scar tissue around the ligament or tendon, providing a good foundation for stable bonding of the ligament or tendon to the ulnar component.
As an example, the pore size of the ulnar pore 31 is 500-700 μm on average, and the porosity is 60-80%.
Preferably, the end of the first end of the body of the distal ulnar prosthesis 30 is provided with a reinforcement rib 32 to improve the strength of the distal ulnar prosthesis and provide a strong support for the ulnar stump.
Preferably, as shown in fig. 4, an ulnar broach 37 extending in a direction away from the articular surface of the wrist joint is provided in the body of the ulnar distal prosthesis 30, and the ulnar broach 37 is inserted into the medullary cavity of the ulnar stump in the human body, which is favorable for further establishing the stability of the positioning and connection between the ulnar distal prosthesis and the ulna.
As shown in fig. 5, the first end of the ulnar articular surface prosthesis 40 (the end facing the ulnar distal prosthesis 30) is provided with a protruding third stopper 41, and the third stopper 41 is installed in the second stopper hole 33 so that the radial relative movement of the ulnar distal prosthesis 30 and the ulnar articular surface prosthesis 40 is somewhat restricted. The second end surface of the ulnar joint surface prosthesis 40 is an ulnar joint surface 42, and the geometric structure (e.g., the concave-convex portion) of the ulnar joint surface 42 is the same as the anatomical form of the wrist joint of the human body. As an example, and with reference to FIGS. 1 and 5, the ulnar articulating surface 42 on the side remote from the distal radius prosthesis 10 is provided with a protrusion to replace the ulnar styloid site.
Preferably, as shown in FIGS. 4 and 5, the third stopper 41 has a frustum shape, and the second stopper hole 33 has a tapered shape, so that the distal ulnar prosthesis 30 and the ulnar articular surface prosthesis 40 are positioned accurately with respect to each other.
Preferably, the radial facet prosthesis 20 and/or the ulnar facet prosthesis 40 are a polyethylene material that is a wear resistant material that also helps protect the metacarpal facet as well as the bone tissue.
The radius joint surface prosthesis and the radius distal end prosthesis in the radius assembly are matched through a cone and a limiting block to form a radius joint prosthesis; the ulnar articular surface prosthesis and the ulnar distal prosthesis in the ulnar assembly cooperate through a cone to form an ulnar joint prosthesis. The radial articular surface 23, the ulnar articular surface 42 and the metacarpal bone together form a wrist joint, and the geometrical shape of the wrist joint is the same as that of the anatomical wrist joint.
In actual operation, the bone defect repair system of the wrist joint is customized according to the image data of a patient, and is matched with the natural anatomical form of the patient, so that the physiological function of the patient can be recovered.
The beneficial effect of this application is as follows:
1. in the application, the radial joint surface and the metacarpal bone jointly form a wrist joint part corresponding to the radius, the geometrical form of the wrist joint part is the same as that of the anatomical wrist joint, and the wrist joint function and the mobility can be recovered.
2. In the application, the ulna joint surface and the metacarpal bone form a wrist joint part corresponding to the ulna, the geometrical shape of the wrist joint part is the same as that of the anatomical wrist joint, and the wrist joint function and the mobility can be recovered.
3. In the application, the geometric shapes of the radius assembly and the ulna assembly are customized based on the anatomical geometric dimensions of the wrist joint bone defect area and the healthy wrist joint, the defect filling of large-section bones of the radius and the ulna can be realized, the anatomical structure of a diseased part can be restored, and the length of the diseased part can be restored.
4. The ulnar joint is reserved through the positioning connection between the radial joint surface prosthesis and the ulnar distal end prosthesis, and the function recovery of the wrist joint is facilitated.
Although some specific embodiments of the present application have been described in detail by way of example, it should be understood by those skilled in the art that the above examples are for illustrative purposes only and are not intended to limit the scope of the present application. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the present application. The scope of the application is defined by the appended claims.
Claims (10)
1. A bone defect repair system for a wrist joint, which is characterized by comprising a distal radius prosthesis and a radius articular surface prosthesis;
a plate-shaped radius bone-knitting part extending along the long axis direction of the body of the distal radius prosthesis is arranged at the first end of the body of the distal radius prosthesis, a plurality of radius connecting holes are formed in the radius bone-knitting part, and a first limiting groove is formed in the end part of the second end of the body of the distal radius prosthesis;
a first end of the radial articular surface prosthesis is provided with a protruding first limiting block, and the first limiting block is arranged in the first limiting groove; the second end surface of the radial articular surface prosthesis is a radial articular surface.
2. The wrist bone defect repair system according to claim 1, wherein the second end of the distal radius prosthesis is further provided at its end with at least one set of first suture holes.
3. The wrist joint bone defect repair system of claim 2, wherein the distal radius prosthesis body has a radial micropore at the end of the first end.
4. The wrist bone defect repair system according to claim 2 or 3, wherein the suture portion where the first suture hole is located is provided with a radial micropore.
5. The wrist joint bone defect repair system according to claim 1, wherein a first limiting hole is provided on the second end surface of the body of the distal radius prosthesis, and a second protruding limiting block is further provided on the first end of the distal radius prosthesis, and the second limiting block is installed in the first limiting hole.
6. The wrist joint bone defect repair system of claim 1, wherein the distal radius prosthesis body is provided with a stiffener at the end of the first end.
7. The wrist bone defect repair system according to claim 2, further comprising an ulnar distal prosthesis and an ulnar facet prosthesis;
the first end of the body of the ulna distal prosthesis is provided with a plate-shaped ulna bone-connecting part extending along the long axis direction of the body, the ulna bone-connecting part is provided with a plurality of ulna connecting holes, and the end surface of the second end of the body of the ulna distal prosthesis is provided with a second limiting hole;
a first end of the ulnar joint surface prosthesis is provided with a protruding third limiting block, and the third limiting block is arranged in the second limiting hole; the second end surface of the ulnar joint surface prosthesis is an ulnar joint surface.
8. The wrist bone defect repair system according to claim 7, wherein a fourth stopper is provided on a side surface of the second end of the body of the distal ulna prosthesis;
and a second limiting groove is formed in the side surface of the radial articular surface prosthesis, and the fourth limiting block is installed in the second limiting groove.
9. The wrist bone defect repair system according to claim 7, wherein the end of the second end of the body of the distal ulnar prosthesis is further provided with at least one set of second suture holes.
10. The wrist joint bone defect repair system according to claim 9, wherein the ulna micro-hole is provided at an end of the first end of the body of the ulna distal prosthesis and/or at a suture portion where the second suture hole is provided.
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| CN202110523147.9A CN113069248A (en) | 2021-05-13 | 2021-05-13 | Bone defect repair system for wrist joint |
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| CN202110523147.9A CN113069248A (en) | 2021-05-13 | 2021-05-13 | Bone defect repair system for wrist joint |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113786269A (en) * | 2021-11-17 | 2021-12-14 | 北京爱康宜诚医疗器材有限公司 | Wrist joint prosthesis |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113786269A (en) * | 2021-11-17 | 2021-12-14 | 北京爱康宜诚医疗器材有限公司 | Wrist joint prosthesis |
| CN113786269B (en) * | 2021-11-17 | 2022-04-19 | 北京爱康宜诚医疗器材有限公司 | Wrist joint prosthesis |
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