Objective To investigate the effectiveness of acetabular tridimensional memory alloy-fixation system (ATMFS) combined with autologous il iac bone in the treatment of old acetabular posterior wall fracture with bone defect. Methods Between January 2002 and February 2009, 17 patients with old acetabular posterior wall fracture and bone defect were treated, including 11 males and 6 females with an average age of 41.7 years (range，20-60 years). The time from fracture to admission was 14-180 days (mean, 63 days). The displacement of the acetabular articular surface was more than or equal to 3 mm. According to the America Association of Orthopedic Surgeon (AAOS) acetabular fracture and defectclassification standard, there were 4 cases of type I, 6 cases of type II, 5 cases of type III, and 2 cases of type IV. After the residual fracture fragments of the acetabular posterior wall and soft tissue hyperplasia were removed, the femoral head was reducted, and posterior wall defect was repaired with autologous il iac bone graft; ATMFS was used to fix acetabular posterior wall and artificial capsular l igament to reconstruct the hip so as to prevent re-dislocation of the femoral head. Results According to Matta imaging assessment standard, the results were excellent in 8 cases, good in 6 cases, fair in 2 cases, and poor in 1 case with an excellent and good rate of 82.3%. All incisions healed by first intention, and no sciatic nerve injury occurred. All patients were followed up 1-8 years (mean, 3.9 years). The mean time of fracture union was 3.6 months (range, 2-6 months). Avascular necrosis of femoral head occurred in 1 case, heterotopic ossification around the acetabulum in 1 case. According to Merle d’ Aubigné-Postel scoring system evaluation, the cl inical results were excellent in 9 cases, good in 6 cases, fair in 1 case, and poor in 1 case with an excellent and good rate of 88.2%. Conclusion ATMFS combined with autologous il iac bone graft and artificial l igament reconstruction of the hip joint capsule is a good choice for the treatment of old acetabular posterior wall fractures with bone defect, which can resume the posterior hip joint stabil ity and prevent re-dislocation of the femoral head.
【Abstract】 Objective To discuss the strategy of condylar reconstruction in the treatment of refractory condylarnonunion and defect of humerus. Methods From September 1998 to September 2005, 18 patients with refractory condylarnonunion concomitant with defect of humerus were treated. The series included 12 males and 6 females, aged 18 to 60 years. Accordingto AO/ASIF system, primal fractures were classified, including 5 cases of type A3, 2 cases of type B1, 4 cases of type C2and 7 cases of type C3 fractures. Condylar nonunion and defect of humerus were confirmed by preoperative X-ray. Defectivebone mass was 1-4 cm2. The mean extension and flexion of elbow joint was 21.5°(5-65°) and 95.8°(85.0-123.5°) respectively. Accordingto Cassebaum scoring system, the excellent and good rate was 27.8% (excellent in 1 case and good in 4 cases). Time frominjury to operation averaged 22.8 months(7-52 months). All patients were operated with approach of olecranon osteotomy.Bone defect was reconstructed with il iac autograft. Shape memory compressive connector, Kirschner wire, cannulated nail, anatomicplates and reconstruction plates were used to fix. Results Eighteen patients were followed up 12-86 months (mean27.6 months). All the incisions healed by first intention. No bone block displacement, loosening or breakage of internal fixationoccurred. The time of bone union averaged 5.7 months(4-8 months). The mean extension and flexion of elbow joint were 11.4°(0-44.5°) and 128.6°(105.5-144.5°) 1 year after operation. Ectopic ossification formed in 1 case at anterior part of elbow 4 monthsafter operation. According to Cassebaum scoring system, the results were excellent in 8 cases, good in 6 cases, fair in 3 cases andpoor in 1 case. The excellent and good rate was 77.8%. Conclusion The shape of humeral condyle can be reconstructed withil iac autograft. Compressive internal fixation of bone block can promote bone union. Anatomical reconstruction, rigid internalfixation and early function exercise can improve the function of elbow joint evidently.