Lateral stability of proximal interphalangeal joint replacement

Yoshitaka Minamikawa, Toshihiko Imaeda, Peter C. Amadio, Ronald L. Linscheid, William P. Cooney, Kai Nan An

Research output: Contribution to journalArticlepeer-review

36 Citations (Scopus)


The lateral stability of the cadaver proximal interphalangeal joint was studied with an electromagnetic tracking system before and after implant replacement. Ten middle fingers were retrieved and randomly divided into two groups for joint replacement with either a silicone rubber flexible finger joint implant or a custom surface replacement prosthesis. Each finger was mounted on a fixture that allowed loading of the proximal interphalangeal joint with tension through the flexor, extensor, and intrinsic tendons. For the intact proximal interphalangeal joint under lateral stress, lateral angulation averaged 4° in extension and 8° with the joint in 60° of flexion. Although lateral angulation increased after surface replacement prosthesis implantation when the joint was flexed more than 20°, comparison with the intact joint showed no statistical difference. With the silicone implant, lateral angulation became more pronounced even in the extended position and showed a significant difference when the proximal interphalangeal joint was flexed more than 20°.

Original languageEnglish
Pages (from-to)1050-1054
Number of pages5
JournalJournal of Hand Surgery
Issue number6
Publication statusPublished - 1994 Nov

All Science Journal Classification (ASJC) codes

  • Surgery
  • Orthopedics and Sports Medicine


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