Osteotomy for femoral anteversion. A prospective 9-year study of 52 children.

Fifty-two children with increased femoral anteversion had bilateral derotational subtrochanteric osteotomies at a mean age of 7 years. They were followed prospectively until at least 15 years of age; the mean observation time was 9 years. They were a subset of 95 children whose 2-year results were reported in 1989.

Osteotomy for femoral anteversion. Complications in 95 children.

Totally, 95 children with increased femoral anteversion had derotational substrochanteric osteotomy with plate fixation. The mean anteversion angle was reduced from 48 degrees to 4 degrees, internal hip rotation from 81 degrees to 42 degrees, and external rotation increased from 9 degrees to 48 degrees. All the osteotomies healed, but serious complications occurred in 13 of the 95 patients.

Regression of femoral anteversion. A prospective study of intoeing children.

To study the spontaneous regression of femoral anteversion, 30 children referred to the outpatient clinic for intoeing were followed until at least 15 years of age. The mean observation time was 9 (7-12) years, and all the children were examined three times during the growth period. The mean radiographic angle at the first examination was 42 degrees, at the second examination 36 degrees, and at the last examination 28 degrees.

The influence of different degrees of stiffness of fixation plates on experimental bone healing.

In order to throw some light on the controversial issue of the optimal stiffness in fracture fixation, the effects on bone healing of rabbit tibial osteotomies fixed by plates with four different degrees of stiffness were studied. The least stiff plate was made of glass fiber-reinforced epoxy; the other three were made of stainless steel. The median bending stiffness in vitro of tibial osteotomies fixed with the various plates were 13%, 17%, 61%, and 74%, related to the stiffness of intact tibiae.