title: Computer-assisted knee arthroplasty versus a conventional jig-based technique. A randomised, prospective trial.
abstract: 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).
authors.affiliation: Royal Perth Hospital, Perth, Western Australia.
authors.forename: S K
authors.initials: SK
authors.lastname: Chauhan
authors.forename: R G
authors.initials: RG
authors.lastname: Scott
authors.forename: W
authors.initials: W
authors.lastname: Breidahl
authors.forename: R J
authors.initials: RJ
authors.lastname: Beaver
mesh_terms: D019645:Arthroplasty, Replacement, Knee / Q000379:methods*; D017760:Bone Malalignment / Q000601:surgery; D005269:Femur / Q000601:surgery; D006801:Humans; D011182:Postoperative Care / Q000379:methods; D011183:Postoperative Complications / Q000209:etiology; D011446:Prospective Studies; D012399:Rotation; D025321:Surgery, Computer-Assisted / Q000379:methods*; D013977:Tibia / Q000601:surgery; D013997:Time Factors; D014057:Tomography, X-Ray Computed / Q000379:methods