Table 3.
Implant Arthroplasty Options for Thumb Carpometacarpal Arthritis
| Implant Type | Implant Name(s) | Description |
|---|---|---|
| Degradable spacer |
|
Removal of distal surface of trapezium and interposition of degradable spacer into joint, secured to first metacarpal and remaining trapezium by means of extraarticular tabs |
| Silicone prostheses |
|
Removal of trapezium and placement of silicone elastomer interposition prosthesis, secured with “stem” into metacarpal base and/or scaphoid |
| Hemiarthroplasty |
|
Surface replacement arthroplasty of the metacarpal base using non-cemented implant and creation of a “socket” in trapezium |
| Total joint replacement (TJA) |
|
Joint replacement with ball-and-socket configuration; often cemented in place |
| Ceramic sphere implant |
|
Interposition of ceramic sphere between metacarpal and trapezium, requiring creation of a concave “socket” in each bone |