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báo cáo hóa học:" The biomechanical analysis of three plating fixation systems for periprosthetic femoral fracture near the tip of a total hip arthroplasty"

Tuyển tập các báo cáo nghiên cứu về hóa học được đăng trên tạp chí sinh học quốc tế đề tài : The biomechanical analysis of three plating fixation systems for periprosthetic femoral fracture near the tip of a total hip arthroplasty | Lever et al. Journal of Orthopaedic Surgery and Research 2010 5 45 http www.josr-online.eom content 5 1 45 éHMÌ JOURNAL OF ORTHOPAEDIC MBs SURGERY AND RESEARCH hpi.fW RESEARCH ARTICLE Open Access The biomechanical analysis of three plating fixation systems for periprosthetic femoral fracture near the tip of a total hip arthroplasty James P Lever1 Rad Zdero 2 3 Markku T Nousiainen2 James P Waddell4 and Emil H Schemitsch5 Abstract Background A variety of techniques are available for fixation of femoral shaft fractures following total hip arthroplasty. The optimal surgical repair method still remains a point of controversy in the literature. However few studies have quantified the performance of such repair constructs. This study biomechanically examined 3 different screw-plate and cable-plate systems for fixation of periprosthetic femoral fractures near the tip of a total hip arthroplasty. Methods Twelve pairs of human cadaveric femurs were utilized. Each left femur was prepared for the cemented insertion of the femoral component of a total hip implant. Femoral fractures were created in the femurs and subsequently repaired with Construct A Zimmer Cable Ready System Construct B AO Cable-Plate System or Construct C Dall-Miles Cable Grip System . Right femora served as matched intact controls. Axial torsional and four-point bending tests were performed to obtain stiffness values. Results All repair systems showed 3.08 to 5.33 times greater axial stiffness over intact control specimens. Four-point normalized bending 0.69 to 0.85 and normalized torsional 0.55 to 0.69 stiffnesses were lower than intact controls for most comparisons. Screw-plates provided either greater or equal stiffness compared to cable-plates in almost all cases. There were no statistical differences between plating systems A B or C when compared to each other p 0.05 . Conclusions Screw-plate systems provide more optimal mechanical stability than cable-plate systems for periprosthetic femur fractures .