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BACKGROUND While the treatment for displaced femoral neck fractures in the elderly (Garden types III and IV) is quite clear, the procedure for impacted or undisplaced femoral neck fractures (Garden types I and II) is still a subject of controversy. METHODS Thirty-seven (all >80 years old) patients with undisplaced femoral neck fractures were treated with(More)
From July 2004 to June 2005, 19 patients with 25 discs underwent anterior cervical discectomy and interbody fusion (ACDF) in which polyetheretherketone (PEEK) cages were filled with freeze-dried cancellous allograft bone. This kind of bone graft was made from femoral condyle that was harvested during total knee arthroplasty. Patient age at surgery was 52.9(More)
STUDY DESIGN A prospective study was performed in case with cervical spondylosis who underwent anterior cervical discectomy and fusion (ACDF) with titanium or polyetheretherketone (PEEK) cages. OBJECTIVE To find out which fusion cage yielded better clinical and radiographic results. SUMMARY OF BACKGROUND DATA Although use of autogenous iliac-bone grafts(More)
PURPOSE We prospectively assessed 22 consecutively treated patients to determine the effectiveness and safety of arthroscopically assisted posterior cruciate ligament (PCL) reconstruction by using a quadriceps tendon autograft. METHODS Twenty-two patients with isolated PCL injury who underwent PCL reconstruction with a quadriceps tendon autograft were(More)
Computed tomography image-guided surgery (CTGS) clearly improves the accuracy of pedicle screw insertion. Recent reports claim that a fluoroscopy-guided system (FGS) offered high accuracy and easy application. However, the superiority of either technique remains unclear in clinical application. This study compares the accuracy of pedicle screws installed(More)
PURPOSE Considerable controversies remain on the graft choice and fixation methods in the posterior cruciate ligament (PCL) reconstruction. The purpose of this study was to compare, at minimal 2-year follow-up, the outcomes of PCL reconstruction between using quadriceps tendon autograft and using quadruple hamstring tendon autograft. TYPE OF STUDY Case(More)
BACKGROUND Pedicle screw fixation in a severely osteoporotic spine remains a challenge for orthopedic surgeons. The previous literature does not adequately address the effects of radial holes for cannulated screws with cement injection and pilot hole tapping on the bone/screw interfacial strength. METHODS Specially designed cannulated pedicle screws, with(More)
BACKGROUND Pedicle screws with PMMA cement augmentation have been shown to significantly improve the fixation strength in a severely osteoporotic spine. However, the efficacy of screw fixation for different cement augmentation techniques, namely solid screws with retrograde cement pre-filling versus cannulated screws with cement injection through(More)
BACKGROUND The association of lumbar spine instability between laminectomy and laminotomy has been clinically studied, but the corresponding in vitro biomechanical studies have not been reported. We investigated the hypothesis that the integrity of the posterior complex (spinous process-interspinous ligament-spinous process) plays an important role on the(More)
BACKGROUND Various autografts or allografts have been used for posterior cruciate ligament (PCL) reconstruction. Quadriceps tendon-patellar bone autograft is considered a good graft choice. HYPOTHESIS Quadriceps tendon-patellar bone graft for PCL reconstruction can achieve a satisfactory clinical outcome after 3 years postoperatively. STUDY DESIGN(More)