Journal
JOURNAL OF BONE AND JOINT SURGERY-BRITISH VOLUME
Volume 86B, Issue 3, Pages 372-377Publisher
BRITISH EDITORIAL SOC BONE JOINT SURGERY
DOI: 10.1302/0301-620X.86B3.14643
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We have compared a new technique of computer-assisted knee arthroplasty with the current conventional jig-based technique in 70 patients randomly allocated to receive either of the methods. Post-operative CT was performed according to the Perth CT Knee Arthroplasty protocol and pre- and post-operative Maquet views of the limb were taken. Intra-operative and peri-operative morbidity data were collected and blood loss measured. Post-operative CT showed a significant improvement in the alignment of the components using computer-assisted surgery in regard to femoral varus/valgus (p = 0.032), femoral rotation (p = 0.001), tibial varus/valgus (p = 0.047) tibial posterior slope (p = 0.0001), tibial rotation (p 0.011) and femorotibial mismatch (p = 0.037). Standing alignment was also improved (p 0.004) and blood loss was less (p = 0.0001). Computer-assisted surgery took longer with a mean increase of 13 minutes (p = 0.0001).
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