Advertisement

Strain patterns in the patellar tendon and the implications for patellar tendinopathy

  • Louis C. Almekinders
  • Jurrien H. Vellema
  • Paul S. Weinhold
Knee

Abstract

This study investigated the strain pattern in human patellar tendon in an area of the tendon where changes commonly associated with patellar tendinitis are found. Eight fresh frozen human knees were instrumented with strain gauges on both the anterior and posterior side of the proximal patellar tendon. Both static and dynamic measurements were carried out in a range from 0° to 60° of flexion. We found uniform tensile strain in the tendon with the knee in full extension. However, as the knee was brought into flexion, the tensile strain increased on the anterior side but decreased on the posterior side in the central, proximal location of the tendon. The posterior side of the proximal patellar tendon is most commonly affected in patellar tendinopathy. This study indicates that this area of the tendon may not subjected to the highest tensile loads in the functional flexion range. It is possible that stress shielding is more important etiological factor in insertional tendinopathy as opposed to repetitive tensile loads.

Tendinopathy Strain Patellar tendinitis 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

Copyright information

© Springer-Verlag 2001

Authors and Affiliations

  • Louis C. Almekinders
    • 1
  • Jurrien H. Vellema
    • 1
  • Paul S. Weinhold
    • 1
  1. 1.Department of Orthopaedic Surgery, Sports Medicine Section, University of North Carolina, Chapel Hill, NC 27599-7055USA

Personalised recommendations