41 results about "Carpometacarpal joint" patented technology

A carpometacarpal joint replacement system for replacing the trapezium bone in the hand is provided. The system includes a trapezial implant for the carpometacarpal joint resulting in replacement of the carpal trapezium bone with a prosthesis having the same anatomical configuration as the trapezium bone. The implant device comprises a plurality of concave surfaces, with the plurality of concave surfaces articulating with the carpal and metacarpal bones.

A wrist splint assembly for being custom-fitted to a hand and wrist to be supported. The wrist splint assembly includes a first splint for being positioned against and formed to the volar aspect of the hand and wrist, and a second splint for being positioned against and formed to the dorsal aspect of the hand and wrist. Each of the first and second splints defines a concave side edge extending inwardly toward the longitudinal axis of the splint for permitting ease of movement of the thumb and associated carpometacarpal joint of the hand against which the splint is positioned. Each splint also includes an inner cushion layer, an initially flexible intermediate layer overlying the inner cushion layer, and a flexible outer layer. The intermediate layer is a substrate impregnated with a moisture-curable resin that hardens upon curing to form a rigid structure of the substrate that retains a shape into which it is molded during curing for maintaining the flexible inner cushion layer in a conforming shape against the hand and wrist. A support retains the first and second splints in position on the hand and wrist during use of the splint assembly.

A swellable, resilient, flexible carpometacarpal (CMC) joint spacer is provided that is made of a swellable fluid absorbing polymeric medium, the spacer being dimensioned and configured to fit into the space between a natural or replacement trapezium and adjacent metacarpal bones and restore separation therebetween. In embodiments, the spacer has a cylindrical shape. In embodiments, the polymeric medium is a hydrogel. In embodiments, the spacer contains an internal reinforcement member. In embodiments, the spacer is delivered to a target site in at least a partially dehydrated state, whereupon it hydrates and expands to create positive pressure against opposing surfaces, thereby causing separation of the joint.

A glove for reducing lateral subluxation of the first carpometacarpal joint that includes a glove body, and a strap portion carried by the glove body. The strap portion extends from a proximal end portion of the glove, and has a length sufficient to allow the strap to be looped around the thumb, to provide dorsal-radial tension on the thumb near the distal end of the first metacarpal in order to reduce lateral subluxation at the first carpometacarpal joint. An attachment element is also provided for securing a distal end of the strap portion to a mutually engaging attachment element secured to the glove body.

An orthopedic thumb splint is adapted for stabilizing a carpometacarpal joint of a user. The exemplary thumb splint includes a flexible fabric splint body having a wrist portion and a generally funnel-shaped thumb portion. The thumb portion defines a narrowed opening for receiving a thumb of the user. A thumb-abducting flexible X-strap is secured to the splint body adjacent the narrowed opening of the thumb portion. The X-strap has first and second diverging distal ends having respective inside surfaces. The inside surface of each distal end includes touch fasteners designed to releasably mate with complementary touch fasteners located on an outside surface of the splint body.

When the joint movement assist device according to the present invention is worn on a hand, and a first bellows (231) is expanded or contracted, a second thumb metacarpal scaffold member (212) rotates with respect to a first thumb metacarpal scaffold member (211A), about an axis of rotation which is a first axis that is "one joint axis" of a biaxial saddle joint. An elastic member (251) elastically restrains the part of the first bellows (231) that faces the carpometacarpal joint of the thumb so as to allow expansion and contraction between the portions connected to the carpometacarpal joint of the thumb, and as to enable the distance between one end section of the first thumb metacarpal scaffold member (211A) and one end section of the second thumb metacarpal scaffold member (212) to change smoothly. The expansion and contraction of a second bellows (232a) causes a third thumb metacarpal scaffold member (213) to rotate with respect to the second thumb metacarpal scaffold member (212), about a central axis which is a second axial member (AX2) that perpendicularly intersects the first axis. Thus, appropriate assistance can be provided for joint movements similar to the joint movements of the hand of a healthy person.

Provided is a hand joint supporter which can reduce the load on the hand joints and prevent hand tenosynovitis. The hand joint supporter (10) comprises a first anchor section (2) for tightening the wearer's forearm with a tubular knitted fabric, a second anchor section (3) for tightening the palm and back of the wearer's hand with the tubular knitted fabric, a hole anchor section (11) being formed as a roughly circular through-hole in the vicinity of the second anchor section (3) in the tubular knitted fabric to insert the wearer's thumb therethrough, and a supporting section (4) extending in the front side and/or back side of the tubular knitted fabric, along the lengthwise direction of the tubular knitted fabric, across the part covering the caprometacarpal joint and being joined to the first anchor section (2) and the hole anchor section (11) so as to support the wearer's hand joints, wherein the stretch resistance, in the circumferential direction of the tubular knitted fabric, of the first anchor part (2) is larger than the stretch resistance, in the circumferential direction of the tubular knitted fabric, of a base fabric section (1), and the stretch resistance, in the length width direction of the tubular knitted fabric, of the supporting section (4) is larger than the stretch resistance, in the length width direction of the tubular knitted fabric, of the base fabric section (1).

The invention relates to the field of treatment of mallet fingers, and in particularly relates to a postoperative fixing device for a mallet finger. The device comprises a fixing plate and a fixing belt, wherein the fixing plate is a sheet body provided with a groove on the lower surface, the fixing plate is spoon-shaped from side-looking, and the fixing plate comprises a carpometacarpal joint fixing sheet, a finger hill section fixing section, a finger median segment fixing section and a distal finger fixing section from the front end to the tail end. The distal finger fixing section extends upward from the tail end of the finger median segment fixing section, and the finger hill section fixing section and the finger median segment fixing section as well as the finger median segment fixing section and the distal finger fixing section are in circular arc transition. According to the treatment demand, angles among the three sections are designed to facilitate postoperative recovery. The fixing belt is designed in sections and the carpometacarpal joint fixing sheet is additionally arranged, so that the fixing effect is good. The comfort level of the patient is improved due to arc shapes at transition of three sections, the groove and the cushion layer.

The invention discloses a traditional Chinese medicine plintlet carpometacarpal joint external fixation device which comprises an upper fixing ring and a lower fixing ring. The bottom end of the upperfixing ring is fixedly connected with a fixing ring, a rotating block is rotatably mounted on the inner side of the fixing ring, the inner side of the rotating block is provided with a moving groove,the inner wall of the moving groove is provided with a sliding groove, a moving block is disposed in the moving groove, the outer wall of the moving block is fixedly connected to a sliding block, theouter wall of the sliding block is slidably connected to the inner wall of the sliding groove, the top inside a chamber of the moving groove is provided with a first fixing groove, the top surface ofthe moving block is provided with a second fixing groove, and a spring abuts between the first fixing groove and the second fixing groove. The traditional Chinese medicine plintlet carpometacarpal joint external fixation device has the advantages of being simple in structure and convenient to adjust, and the problems that an existing mode has a poor fixing effect and brings great inconvenience tothe treatment process is solved.