title: Medium- and long-term results of high tibial osteotomy using Garches external fixator and gait analysis for dynamic correction in varus osteoarthritis of the knee.
abstract: In arthritis of the varus knee, a high tibial osteotomy (HTO) redistributes load from the diseased medial compartment to the unaffected lateral compartment. We report the outcome of 36 patients (33 men and three women) with 42 varus, arthritic knees who underwent HTO and dynamic correction using a Garches external fixator until they felt that normal alignment had been restored. The mean age of the patients was 54.11 years (34 to 68). Normal alignment was achieved at a mean 5.5 weeks (3 to 10) post-operatively. Radiographs, gait analysis and visual analogue scores for pain were measured pre- and post-operatively, at one year and at medium-term follow-up (mean six years; 2 to 10). Failure was defined as conversion to knee arthroplasty. Pre-operative gait analysis divided the 42 knees into two equal groups with high (17 patients) or low (19 patients) adductor moments. After correction, a statistically significant (p < 0.001, t-test,) change in adductor moment was achieved and maintained in both groups, with a rate of failure of three knees (7.1%), and 89% (95% confidence interval (CI) 84.9 to 94.7) survivorship at medium-term follow-up. At final follow-up, after a mean of 15.9 years (12 to 20), there was a survivorship of 59% (95% CI 59.6 to 68.9) irrespective of adductor moment group, with a mean time to conversion to knee arthroplasty of 9.5 years (3 to 18; 95% confidence interval ± 2.5). HTO remains a useful option in the medium-term for the treatment of medial compartment osteoarthritis of the knee but does not last in the long-term. Cite this article: Bone Joint J 2016;98-B:601-7.
authors.affiliation: Royal Stoke University Hospital, Newcastle Road, Stoke-on-Trent ST4 6QG, UK.
authors.forename: D
authors.initials: D
authors.lastname: McClelland
authors.affiliation: Wrexham Maelor Hospital, Croesnewydd Road, Wrexham, LL13 7TD, UK.
authors.forename: D
authors.initials: D
authors.lastname: Barlow
authors.affiliation: Royal Stoke University Hospital, Newcastle Road, Stoke-on-Trent ST4 6QG, UK.
authors.forename: T S
authors.initials: TS
authors.lastname: Moores
authors.affiliation: Royal Stoke University Hospital, Newcastle Road, Stoke-on-Trent ST4 6QG, UK.
authors.forename: C
authors.initials: C
authors.lastname: Wynn-Jones
authors.affiliation: Royal Stoke University Hospital, Newcastle Road, Stoke-on-Trent ST4 6QG, UK.
authors.forename: D
authors.initials: D
authors.lastname: Griffiths
authors.affiliation: Keele University, Staffordshire, ST5 6BG, UK.
authors.forename: P J
authors.initials: PJ
authors.lastname: Ogrodnik
authors.affiliation: Royal Stoke University Hospital, Newcastle Road, Stoke-on-Trent ST4 6QG, UK.
authors.forename: P B M
authors.initials: PB
authors.lastname: Thomas
mesh_terms: D000328:Adult; D000368:Aged; D016267:External Fixators; D005260:Female; D005500:Follow-Up Studies; D005684:Gait / Q000502:physiology*; D006801:Humans; D008297:Male; D008875:Middle Aged; D020370:Osteoarthritis, Knee / Q000503:physiopathology / Q000601:surgery*; D010027:Osteotomy / Q000379:methods*; D016059:Range of Motion, Articular / Q000502:physiology; D013977:Tibia / Q000601:surgery*; D064232:Visual Analog Scale
keywords: Garches; dynamic correction; high tibial osteotomy; long term follow-up