The Question of Posture.- Early Diagnosis of Osteonecrosis by Functional Bone Investigation.- Early Diagnosis and Treatment of Ischemic Necrosis of the Femoral Head.- Revitalization of the Osteonecrotic Femoral Head by Vascular Bundle Transplantation.- Transtrochanteric Ventral Rotation Osteotomy After Sugioka for Treatment of Femoral Head Necrosis.- Results of Flexion Osteotomy on Segmental Femoral Head Necrosis in Adults.- Treatment of Idiopathic Necrosis of the Femoral Head by Modified Cup Arthroplasty.- Idiopathic Necrosis of the Femoral Head. Results of Intertrochanteric Osteotomy and Joint Resurfacing.- List of Contributors.