---
kind: "section"
citation: "21 C.F.R. § 888.3810"
title: "21"
number: "888.3810"
heading: "Wrist joint ulnar (hemi-wrist) polymer prosthesis."
url: "https://uscodex.org/cfr/21/888.3810"
---

# §888.3810. Wrist joint ulnar (hemi-wrist) polymer prosthesis.

- (a) **Identification.** A wrist joint ulnar (hemi-wrist) polymer prosthesis is a mushroom-shaped device made of a medical grade silicone elastomer or ultra-high molecular weight polyethylene intended to be implanted into the intramedullary canal of the bone and held in place by a suture. Its purpose is to cover the resected end of the distal ulna to control bone overgrowth and to provide an articular surface for the radius and carpus.
- (b) **Classification.** Class II.

## Notes

### Authority

Authority: 21 U.S.C. 351, 360, 360c, 360e, 360j, 360 l , 371.

### Source

Source: 52 FR 33702, Sept. 4, 1987, unless otherwise noted.