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Journal of Bone and Joint Surgery - British Volume, Vol 86-B, Issue 3, 372-377.
doi: 10.1302/0301-620X.86B3.14643  
Copyright © 2004 by British Editorial Society of Bone and Joint Surgery
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Computer-assisted knee arthroplasty versus a conventional jig-based technique

A RANDOMISED, PROSPECTIVE TRIAL

S. K. Chauhan, FRCS (Trauma & Orth), Arthroplasty Fellow1; R. G. Scott, MB BS, Radiology Research Registrar2; W. Breidahl, FRANZCR, Consultant Musculoskeletal Radiologist2; and R. J. Beaver, FRACS, Head1

1 Department of Elective Orthopaedic Surgery
2 The Royal Perth Hospital, Shenton Park Campus, Selby Street, Perth 6008, Western Australia.

Correspondence should be sent to Dr R. J. Beaver.

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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Hip, Knee, Trauma, Upper limb, Foot & Ankle, Paediatrics, Oncology, Spine, Arthroplasty, General