Table 1.

Soft tissue and bony contributions to hip stability

Soft tissue—static	Soft tissue—dynamic	Osseous—acetabulum	Osseous—femur
Connective tissue disorder Capsule (iliofemoral, pubofemoral, ischiofemoral ligaments, zona orbicularis) Acetabular labrum Ligamentum teres Iatrogenic—unrepaired capsulotomy Iatrogenic—labral debridement Iatrogenic—ligamentum teres debridement	Iliopsoas Rectus femoris Iliocapsularis Gluteus minimus, gluteus medius Gluteus maximus Iatrogenic—iliopsoas tenotomy	Lateral center edge angle Anterior center edge angle Tonnis angle Sharp’s angle Femoral head extrusion index Head-center distance Acetabular version Posterior wall sign Ischial spine sign Shenton’s line Iatrogenic—excessive rim resection	Neck-shaft angle Alpha angle Head-neck offset Head-trochanteric distance Femoral version Iatrogenic—excessive cam osteoplasty