[Applied research on autologous bone graft for acetabular defect of Crowetype III and IV hip dysplasia].

OBJECTIVE: To study clinical efficacy of autologous bone graft for acetabular defect of Crowe III and IV hip dysplasia. METHODS: The 22 patients with 25 hips of DDH (Crowe type III, IV) from March 2010 to May 2013 were retrospectively analyzed. Total hip arthroplasty (THA) combined autogenous bone grafting was performed for all these patients with osteoarthritis secondary to DDH. Among them, 19 patients were females (21 hips) and 3 patients were males (4 hips), ranging in age from 43 to 67 years old, averaged 55 years old. There were 6 hips with Crowe type III and 19 hips with Crowe type IV. Before surgery, all the patients had hip pain, limb shortening and hip limited function of hip joint. After 12 months, the degree of recovery about limb length, functional recovery, autogenous bone graft fusion were observed. RESULTS: All the patients were followed up and no dislocation were occurred. At 12 months after operation, the average Harris hip joint llzncation score were 83.30±6.13, and 18 cases got an excellent result and 4 good. The length of lower limbs decreased from preoperative (3.20±0.81) cm to 12 months after operation (0.92±0.23) cm (t=14.864, P<0.05). CONCLUSION: THA combined with structural femoral head autograft for patients with osteoarthritis secondary to DDH can obtain favorable results, significantly improving the effect of operation treatment.

[Renovation stem revision femoral head arthroplasty for unstable intertrochanteric fracture in the elderly].

OBJECTIVE: To observe clinical efficacy of renovation stem revision femoral head arthroplasty for the treatment of unstable intertrochanteric fracture in the elderly. METHODS: Totally 32 elderly patients with unstable intertrochanteric fracture were treated with renovation stem revision femoral head arthroplasty from September 2007 to January 2011. There were 11 males and 21 females with an average age of 83.8 (ranged, 80 to 98) years old,the time from injury to hospital ranged from 4 h to 14 days. According to Evans-Jensen classification, 6 cases were type II a, 20 cases were type II b, and 6 cases were type III. Postoperative mortality, complication rates and Harris hip function score were compared and analyzed to evaluate curative effect. RESULTS: All patients were followed up and no dislocation occurred. Six patients were died during 15 months and 4.5 years; 24 cases recoved to independent wakling at 6 months after operation, and 8 cases walked with stick and walker. The average Harris hip joint function score were (91.56 +/- 2.96), 28 cases got excellent results and 4 cases good. Nine cases occurred complications and healed after treatment. CONCLUSION: Renovation stem revision femoral head arthroplasty is a active and reliable method in treating unstable intertrochanteric fracture in the elderly.

[Application of modified TransFix-II technique in arthroscopic reconstruction of the anterior cruciate ligament using double tibial tunnel].

OBJECTIVE: To describe a modified TransFix- 11 technique for arthroscopic reconstruction of anterior cruciate ligament (ACL) using double tibial tunnel. METHODS: Twelve cases of ACL ruptures were reconstructed anatomically using modified TransFix- 11 technique. The double-looped semitendinosus and gracilis (DLSTG) tendon autograft was placed in a single femoral tunnel and double tibial tunnels to replace the anteromedial (AM) and posterolateral (PL) bundles of the original ACL. All the 12 patients underwent the same postoperative accelerated rehabilitation program. RESULTS: Lachman test, anterior drawer test and pivot shift sign, and mcmurray test showed negative results in all cases. All patients regained normal range of motion of the knee and gait 4-6 weeks after operation, and 8 patients returned to the low risk sports at 10-12 weeks. One year after operation, 9 patients were followed: the International Knee Document Committee (IKDC) analysis revealed normal or near normal knees in 9 patients. The Tegner score revealed that 6 patients regained their pre-injury activity level. No patient had a significant femoral or tibial tunnels enlargement, as shown by follow-up CT scan. CONCLUSION: Arthroscopic ACL reconstruction with double tibial tunnel using DLSTG and the technique of modified TransFix-II is reliable for replacement of the AM and PL bundles of the original ACL. The postoperative accelerated rehabilitation and the rapid restoration of the injured knee function can be expected.