Prevention of hip lag screw cut-out by cement augmentation: Description of a new technique and preliminary clinical results

摘要: Cement augmentation of hip lag screws to avoid cut-out displacement is classically described, along with a number technical drawbacks. In series six elderly patients fractures in osteoporotic bone, we illustrate catheter-assisted delivery limited amounts new bisphenol-a-glycidyl dimethacrylate (bis-GMA)-based composite into compression screw threads, enabling significant increase insertional torque compared unaugmented screws. two patients, that did not initially purchase were tightened minimum 1 N-m after augmenting bis-GMA-based composite. No or femoral head relative baseline (2 days postoperative) was seen any patient on serial x-rays taken up 6 months surgery. This technique adds approximately 10 minutes surgery time. Advantages over traditional PMMA include mixing on-demand, the ability make repeated injections extended periods event perforations (in one this series), precise placement adequately small volumes material, and lower exotherm. Potentially, may reduce frequency complications by enhancing bone-implant interface.