1981 年 30 巻 2 号 p. 258-260
Although Harrington instrumentation is the most popularized surgical method for scoliosis, there is frequently a loss of correction curve after this method of treatment.
In regard to causes of a loss of correction curve, one need take into account the way of postoperative external fixation, misreading of range of fixation, failure in fusion, problem in metal material for fixation, growth of bone as well as elastisty of bone.
This is the report of postoperative loss of correction curve after Harrington instrumentation surgery in 29 cases with a special attention to the relation with α, γ and T angles after Onimus et al.
We found that the decrease in α angle is prominent in the cases with a big loss in correction curve and there was a tendency that it is big in the cases of holding loss.
γ-angle showed considerable amount of change irrespective of a loss of correction curve.
T-angle showed minimal amount of change in relation to the loss of correction curve. A significant change in T angle was found in the cases with increased lumbar curve caused by error in evaluation of range of fixation.