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Contributions of the Abductor Muscles to Rotational and Distractive Stability of the Hip in a Biomechanical Cadaveric Model.
Lim, Daniel P; Lazaro, Lionel E; Kyhos, Justin F; Chau, Michael M; Ladnier, Karen J; Nelson, Trevor J; Eberlein, Samuel A; Banffy, Michael B; Metzger, Melodie F.
Afiliación
  • Lim DP; Kerlan-Jobe Institute, Cedars-Sinai Medical Center, Los Angeles, California, USA.
  • Lazaro LE; Kerlan-Jobe Institute, Cedars-Sinai Medical Center, Los Angeles, California, USA.
  • Kyhos JF; Kerlan-Jobe Institute, Cedars-Sinai Medical Center, Los Angeles, California, USA.
  • Chau MM; Kerlan-Jobe Institute, Cedars-Sinai Medical Center, Los Angeles, California, USA.
  • Ladnier KJ; Kerlan-Jobe Institute, Cedars-Sinai Medical Center, Los Angeles, California, USA.
  • Nelson TJ; Orthopaedic Biomechanics Laboratory, Cedars-Sinai Medical Center, Los Angeles, California, USA.
  • Eberlein SA; Orthopaedic Biomechanics Laboratory, Cedars-Sinai Medical Center, Los Angeles, California, USA.
  • Banffy MB; Kerlan-Jobe Institute, Cedars-Sinai Medical Center, Los Angeles, California, USA.
  • Metzger MF; Orthopaedic Biomechanics Laboratory, Cedars-Sinai Medical Center, Los Angeles, California, USA.
Orthop J Sports Med ; 12(3): 23259671241231984, 2024 Mar.
Article en En | MEDLINE | ID: mdl-38444567
ABSTRACT

Background:

The gluteus minimus (GMin) and gluteus medius (GMed) are important dynamic stabilizers of the hip, but quantitative data on their biomechanical roles in stabilizing the hip are currently lacking.

Purpose:

To (1) establish a reproducible biomechanical cadaveric model of the hip abductor complex and (2) characterize the effects of loading the GMin and GMed on extraneous femoral rotation and distraction. Study

Design:

Controlled laboratory study.

Methods:

A total of 10 hemipelvises were tested in 4 muscle loading states (1) unloaded, (2) the GMin loaded, (3) the GMed loaded, and (4) both the GMin and GMed loaded. Muscle loads were applied via cables, pulleys, and weights attached to the tendons to replicate the anatomic lines of action. Specimens were tested under internal rotation; external rotation; and axial traction forces at 0°, 15°, 30°, 60°, and 90° of hip flexion.

Results:

When loaded together, the GMin and GMed reduced internal rotation motion at all hip flexion angles (P < .05) except 60° and reduced external rotation motion at all hip flexion angles (P < .05) except 0°. Likewise, when both the GMin and GMed were loaded, femoral distraction was decreased at all angles of hip flexion (P < .05).

Conclusion:

The results of this study demonstrated that the GMin and GMed provide stability against rotational torques and distractive forces and that the amount of contribution depends on the degree of hip flexion. Clinical Relevance Improved understanding of the roles of the GMin and GMed in preventing rotational and distractive instability of the hip will better guide treatment of hip pathologies and optimize nonoperative and operative therapies.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Orthop J Sports Med Año: 2024 Tipo del documento: Article País de afiliación: Estados Unidos Pais de publicación: Estados Unidos
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
Buscar en Google

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Orthop J Sports Med Año: 2024 Tipo del documento: Article País de afiliación: Estados Unidos Pais de publicación: Estados Unidos