title: Arthroscopy-assisted computer navigation in high tibial osteotomy for varus knee deformity.
abstract: 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.
authors.affiliation: Department of Orthopaedics and Traumatology, Prince of Wales Hospital, The Chinese University of Hong Kong, Hong Kong. lown@ort.cuhk.edu.hk
authors.forename: W N
authors.initials: WN
authors.lastname: Lo
authors.forename: K W
authors.initials: KW
authors.lastname: Cheung
authors.forename: S H
authors.initials: SH
authors.lastname: Yung
authors.forename: K H
authors.initials: KH
authors.lastname: Chiu
mesh_terms: 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