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Patellar tendon buckling is altered with age.

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Patellar tendon buckling, a folding of the tendon during knee extension, is common in adults. Older adults may experience less buckling, potentially increasing injury risk.

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Area of Science:

  • Biomechanics
  • Orthopedics
  • Sports Medicine

Background:

  • Patellar tendon buckling, or folding, during knee extension is a recently observed phenomenon.
  • Its clinical significance and influence by demographic factors remain unclear.
  • Previous research suggests buckling may protect the tendon from rupture during extreme contractions.

Purpose of the Study:

  • To investigate age- and sex-based differences in patellar tendon buckling during passive knee extension.
  • To explore the relationship between buckling and intrinsic factors like joint flexibility.

Main Methods:

  • Recruited 41 healthy adults aged 21-80 years.
  • Assessed patellar tendon buckling during passive knee extension using imaging techniques.
  • Analyzed data for age- and sex-related variations and correlations with intrinsic factors.

Main Results:

  • 93% of participants exhibited patellar tendon buckling, predominantly in the distal tendon.
  • No significant differences in buckling magnitude were found based on age or sex.
  • A significant age-based difference in buckling angle was observed, with younger adults unbuckling later in flexion.

Conclusions:

  • Patellar tendon buckling is a common feature of normal knee function.
  • Older adults may exhibit altered buckling patterns, potentially reducing protective benefits.
  • Further research is needed to understand the clinical implications of patellar tendon buckling for injury prevention.