Changes in osseous correction after proximal tibial osteotomy: radiostereometry of closed- and open-wedge osteotomy in 33 patients.
33 patients (22 men), median age 54 (40-68) years, with medial gonarthrosis grades 1-3, were treated by closed-wedge osteotomy (high tibial osteotomy = HTO, n 16) or open-wedge osteotomy by hemicallotasis (hemicallotasis osteotomy = HCO, n 19). 2 patients were operated on bilaterally. The patients were studied by RSA (radiostereometric analysis) for measuring 3-D changes in the correction achieved. In the HTO group the RSA measurements were obtained at the time of plaster removal, 1 month later and 1 year after surgery. In the HCO group, the RSA measurements were performed at the time of removal of the external fixator, 1 month later and 1 year after surgery. After removal of the fixation, HTO was associated with increased medial/lateral and distal translation of the proximal segment, compared to HCO. In addition, the tibial plateau rotated more around the longitudinal axis of the tibia after HTO.
Magyar
G
G
Department of Orthopedics, University Hospital, Lund, Sweden. Göran.Magyar@ort.lu.se
Toksvig-Larsen
S
S
Lindstrand
A
A
D000328:Adult; D000368:Aged; D000886:Anthropometry; D001696:Biomechanical Phenomena; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D020370:Osteoarthritis, Knee / Q000000981:diagnostic imaging* / Q000503:physiopathology / Q000601:surgery*; D019857:Osteogenesis, Distraction / Q000009:adverse effects / Q000379:methods*; D010027:Osteotomy / Q000009:adverse effects / Q000379:methods*; D010780:Photogrammetry; D011446:Prospective Studies; D016059:Range of Motion, Articular; D012399:Rotation; D013977:Tibia / Q000601:surgery*; D013997:Time Factors; D014057:Tomography, X-Ray Computed; D016896:Treatment Outcome; D016474:Weight-Bearing