Biomechanics of the Hip

I. Biomechanics of the Hip.- I. Previous Works.- II. Forces Exerted on a Normal Hip.- III. Mechanical Stressing of the Normal Hip Joint.- IV. Mechanical Stressing of the Normal Femoral Neck.- V. Cartilage Reaction to the Articular Compressive Stresses.- VI. Bone Reaction to the Articular Compressive Stresses.- VII. Mechanical Significance of the Neck-Shaft Angle.- VIII. Significance of the Subchondral Sclerosis in the Acetabulum.- IX. Conclusion.- II. Principles of a Biomechanical Treatment of Osteoarthritis of the Hip. Critical Analysis of Different Surgical Procedures. Instinctive Attempts to Relieve Stress in the Joint.- I. Modifying the Biology of the Tissues.- II. Reducing Joint Pressure.- III. Instinctive Attempts to Reduce the Stress on the Affected Hip.- IV. Conclusion.- III. Surgical Treatment of Osteoarthritis of the Hip.- I. X-rays.- II. Hanging-Hip Procedure.- III. Varus Intertrochanteric Osteotomy (Pauwels I).- IV. Valgus Intertrochanteric Osteotomy and Tenotomy (Pauwels II).- V. Lateral Displacement of the Greater Trochanter.- VI. Shortening of the Opposite Leg.- VII. Changing Indication.- VIII. No Indication for Any of the Operations Previously Described.- IX. Reoperations.- X. Age of the Patients and Duration of the Postoperative Results.- XI. Long-term Results.- XII. Osteotomies Distal to the Lesser Trochanter (Lorenz, Schanz, Milch).- IV. Osteoarthritis with Protrusio acetabuli.- I. Rationale.- II. Indications.- III. Abduction Contracture.- IV. Conclusion.- V. Avascular Necrosis of the Femoral Head.- I. Legg-Calvé-Perthes' Disease.- II. Avascular Necrosis of the Femoral Head in Adults.- VI. Dysplastic Hips.- I. Introduction.- II. In Infants.- III. In Children and Adolescents.- IV. In Adults.- V. Conclusion.- VII. Results.- I. Hanging-Hip Procedure.-II. Varus and Valgus Intertrochanteric Osteotomy.- III. Lateral Displacement of the Greater Trochanter.- IV. Schanz Osteotomy.- V. Conclusion.- VIII. General Conclusions.- Appendix: Fixation of the Fragments After Intertrochanteric Osteotomy.- References.