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Hip Anterior Capsule — Iliofemoral Zone

capsula articularis coxae — zona iliofemorale anterior

The anterior hip capsule in the iliofemoral zone is the thick anterior wall of the hip joint reinforced by the iliofemoral Y-ligament, creating the strongest region of the hip capsule and the primary anterior restraint against femoral head escape.

Region: Pelvis & Hip

Biomechanics

Function & Actions

Provides the strongest anterior hip containment, limits hip hyperextension during standing, resists anterior femoral head displacement, and is the capsular zone that undergoes the most significant contraction in hip flexion contracture.

Clinical Relevance

Clinical Notes

Anterior capsular laxity from hip impingement surgery (over-aggressive capsulotomy) produces anterior hip instability — the hip dislocates anteriorly in extension-external rotation. Capsular closure after hip arthroscopy preserves this restraint. Femoroacetabular impingement bone resection combined with capsular closure reduces post-operative instability risk.

Pathology

Common Injuries & Conditions

Post-Arthroscopy Anterior Hip Instability

Anterior hip capsular laxity from aggressive capsulotomy during hip arthroscopy producing anterior subluxation in extension, requiring capsular plication repair to restore the anterior constraint.