Simulation by stereographic processing of computed tomography for transtrochanteric rotation osteotomy in necrosis of the femoral head

• Published in: International orthopaedics Vol. 22; no. 2; pp. 116 - 121
• Main Authors: TANAKA, S, FUKUDA, K, TOMIHARA, M
• Format: Journal Article
• Language: English
• Published: Berlin Springer 1998; Springer-Verlag
• Subjects: Adult; Biological and medical sciences; Computer Simulation; Female; Femur Head Necrosis - diagnostic imaging; Femur Head Necrosis - surgery; Humans; Investigative techniques, diagnostic techniques (general aspects); Male; Medical sciences; Middle Aged; Original; Osteoarticular system. Muscles; Osteotomy - methods; Radiodiagnosis. Nmr imagery. Nmr spectrometry; Rotation; Tomography, X-Ray Computed; Treatment Outcome; Human; Prognosis; Radiodiagnosis; Femoral head; Osteotomy; Aseptic osteonecrosis; Diseases of the osteoarticular system; Lower limb; Exploration; Bone disease; Orthopedic surgery; Simulation; Medical imagery; Computerized axial tomography; Preoperative; Technique
• ISSN: 0341-2695; 1432-5195
• DOI: 10.1007/s002640050221

The transtrochanteric rotation osteotomy described by Sugioka will preserve the femoral head in patients with avascular necrosis of the femoral head, but there is controversy about the clinical results. We developed a simulation system for rotation osteotomy, based on stereographic processing through computed tomography, the object being to determine the indication for this procedure and the degree of rotation required. This method makes it possible to determine the degree of rotation needed to displace the necrotic areas from the weightbearing zone; the need for a varus osteotomy can also be assessed. Our clinical results improved when we used this method. CT stereographic drawings in patients with avascular necrosis of the femoral head are useful for assessing the necrotic area.