Biomechanical analysis of finger flexor pulley reconstruction

J Hand Surg Br. 1989 Aug;14(3):278-82. doi: 10.1016/0266-7681_89_90081-8.

Abstract

Fifty cadaver digits were used to study the mechanical properties of five different methods of pulley reconstruction and the effectiveness of three different pulley reconstructive arrangements in restoring a normal relationship between tendon excursion and joint motion. All reconstructed pulleys showed less stiffness and more displacement before failure than normal intact pulleys. Although reconstruction using a length of another tendon woven through the remaining fibrous rim of the pulley and both double and triple tendon graft loops around bone absorbed more energy to failure than a normal pulley, only the triple loop around bone could withstand as much load before failure as a normal pulley. No reconstruction restored a normal tendon excursion/joint motion relationship, but reconstruction of the A2 and A4 pulleys restored a more normal relationship than either the "belt loop" reconstruction or a combination belt loop, A2 and A4 reconstruction.

Publication types

  • Research Support, U.S. Gov't, P.H.S.

MeSH terms

  • Biomechanical Phenomena
  • Cadaver
  • Fingers / surgery*
  • Humans
  • Tendons / surgery*