Arthroscopy-assisted computer navigation in high tibial osteotomy for varus knee deformity.
OBJECTIVE
To assess the accuracy of knee alignment after high tibial osteotomy (HTO) for varus knee deformity using arthroscopy-assisted computer navigation.


METHODS
Six men and 4 women aged 47 to 53 (mean, 49) years underwent medial open wedge HTO for varus knee deformity and medial unicompartmental osteoarthritis using arthroscopy-assisted computer navigation with fluoroscopy. Patients were followed up for a mean of 23 (range, 11-32) months. Intra- and post-operative leg alignments were compared.


RESULTS
The mean postoperative coronal plane alignment was 2.7 (range,1-4) degree valgus; the mean deviation from intra-operative computer images was one (range, 0.1-1.9) degree; 5 knees had less valgus in the postoperative radiographs than the intra-operative computer images.


CONCLUSIONS
Despite being more technically demanding, time consuming, and costly, arthroscopy-assisted computer navigation is safe, accurate, and reliable for HTO.
Lo
W N
WN
Department of Orthopaedics and Traumatology, Prince of Wales Hospital, The Chinese University of Hong Kong, Hong Kong. lown@ort.cuhk.edu.hk
Cheung
K W
KW
Yung
S H
SH
Chiu
K H
KH
D001182:Arthroscopy; D015331:Cohort Studies; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D020370:Osteoarthritis, Knee / Q000000981:diagnostic imaging / Q000473:pathology* / Q000601:surgery*; D010027:Osteotomy / Q000379:methods*; D011859:Radiography; D020127:Recovery of Function; D015203:Reproducibility of Results; D012189:Retrospective Studies; D025321:Surgery, Computer-Assisted; D013977:Tibia / Q000601:surgery*; D016896:Treatment Outcome