The Gluteus Medius Experiences Significant Excursion With Hip Flexion

PurposeTo evaluate the effect of hip flexion and rotation on excursion gluteus medius (Gmed) minimus (Gmin) myotendinous unit.MethodsSeven hips from 4 cadaveric specimens (males, 68.5 ± 18.3 years old) were dissected to isolate Gmed posterior lateral insertions Gmin proximal distal insertions. Sutures placed tendon through origins created in iliac fossa simulate unit. A load 10N was applied. Myotendinous measured at 10° extension 0°, 45°, 90° neutral rotation, maximum internal external flexion. The amount abduction also each position with 20N applied tendon. Repeated-measures analysis variance Tukey post hoc used for statistics.ResultsGmed-lateral ranged 2.4 0.4 mm 23.0 1.5 (P < .001), Gmed-posterior 0.92 0.5 38.1 1.1 .001). shortened 4.2 0.3 −0.2 (Gmin-prox: P = .525, Gmin-distal: At Gmin-distal demonstrated a 92.6% 51.3% increase excursion, respectively Gmed-lateral 49.4% 23.1% .001).ConclusionsThe unit undergoes significant flexion, whereas both had femoral flexion.Clinical RelevanceIt is important understand whether active or passive early postoperative period causes excessive strain an abductor repair. We found that consideration should be given limit after repair repairs. To Seven statistics.