Prosthetic silicone scaphoid strains: effects of intercarpal fusions.

Journal Article (Journal Article)

To assess stress shielding by partial intercarpal fusion, strains within a silicon scaphoid prosthesis were measured in five fresh upper extremities while the wrist was moved through a functional range of motion before and after capitate-lunate and capitate-hamate-lunate-triquetral intercarpal fusions. Capitate-lunate fusions resulted in an overall 18.4% reduction in compressive strains and a 10.8% reduction in tensile strains. Capitate-hamate-lunate-triquetral fusions reduced compressive strains by 28.5% and tensile strains by 26.3%. Radially deviated positions and positions of extension produced no reduction in strains with the partial fusions. Modest strain shielding can be obtained with partial intercarpal fusions. The effect, however, is position dependent, and whether this degree of strain shielding can reduce the incidence of particulate synovitis remains unknown.

Full Text

Duke Authors

Cited Authors

  • Toby, EB; Glisson, RR; Seaber, AV; Urbaniak, JR

Published Date

  • May 1991

Published In

Volume / Issue

  • 16 / 3

Start / End Page

  • 469 - 473

PubMed ID

  • 1861029

International Standard Serial Number (ISSN)

  • 0363-5023

Digital Object Identifier (DOI)

  • 10.1016/0363-5023(91)90016-5


  • eng

Conference Location

  • United States