Changes in osseous correction after proximal tibial osteotomy: Radiostereometry of closed- and open-wedge osteotomy in 33 patients |
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Authors: | G ran Magyar S ren Toksvig-Larsen Anders Lindstrand |
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Institution: |
a Department of Orthopedics, University Hospital, Lund, Sweden |
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Abstract: | 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 hemicallota-sis (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. |
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