Femoral cement extraction in revision total hip arthroplasty – an in vitro study comparing computer-assisted freehand-navigated cement removal to conventional cement extraction
AbstractRevision surgery of cemented femoral stems in total hip arthroplasty is gaining more and more importance, but cement removal in revision hip arthroplasty may be technically challenging. Conventional manual cement removal can be time consuming and be associated with complications such as cortical perforation, fracture, or bone loss. The aim of this study was to investigate the practicability of computer-navigated cement removal.In anThe mean time for cement removal was 29±5 min for the conventional method and 32±8 min for the freehand-navigated cement removal. Here, excepting the preparatory examinations, the navigated cement removal only took 13±5 min. The measured temperature during polymerization was 36±5°C and during navigated cement removal was 37±8°C. In the distal part of the femur, cement removal was more accurate with the conventional method compared to the navigated one.The freehand-navigated cement removal, with the exception of the preparatory examinations, is time saving compared to the conventional method. However, a potential for technical development especially for the milling device and accuracy exist.