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A cadaveric model for ligamentum teres function: a pilot study.

RobRoy L Martin1, Benjamin R Kivlan, F Richard Clemente

  • 1Department of Physical Therapy, Duquesne University, 114 Rangos School of Health Sciences, Pittsburgh, PA 15282, USA. martinr280@duq.edu

Knee Surgery, Sports Traumatology, Arthroscopy : Official Journal of the ESSKA
|November 3, 2012
PubMed
Summary
This summary is machine-generated.

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The ligamentum teres stabilizes the hip by tightening during movement, supporting a ball and string model. This finding is crucial for understanding hip instability and ligamentum teres pathology.

Area of Science:

  • Orthopedic biomechanics
  • Hip joint anatomy and function

Background:

  • The function of the ligamentum teres, despite its prevalence and clinical impact, remains poorly understood.
  • Ligamentum teres pathology can lead to significant hip joint issues.

Purpose of the Study:

  • To elucidate the role of the ligamentum teres in hip joint stabilization.
  • To evaluate the applicability of a ball and string model for describing ligamentum teres function.

Main Methods:

  • Dissection of eight embalmed cadavers to isolate the ligamentum teres.
  • Measurement of hip range of motion (abduction, adduction, medial, and lateral rotation) in three trials.
  • Recording the ligamentum teres position relative to the femoral head at range of motion endpoints.

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Main Results:

  • The ligamentum teres limited hip abduction, medial rotation, and lateral rotation at mean endpoint positions of 73°, 64°, and 58°, respectively.
  • The ligamentum teres wrapped around the femoral head, preventing inferior, posterior, and anterior subluxation during these movements.
  • No significant differences in endpoint positions were observed across repeated trials.

Conclusions:

  • The ligamentum teres actively tightens to restrict hip abduction, medial rotation, and lateral rotation.
  • A ball and string model effectively describes the biomechanical function of the ligamentum teres.
  • Findings are significant for managing hip instability and ligamentum teres pathology.