Callus formation in femur and tibia during leg lengthening: 7 patients examined with DXA
Tanaka, K.; Kurokawa, T.; Nakamura, K.; Matsushita, T.; Horinaka, S.; Kusaba, I.; Okazaki, H.; Mamada, K.; Shiro, R.; Ou, W.; Hung, S.C.
Acta Orthopaedica Scandinavica 67(2): 158-160
1996
ISSN/ISBN: 0001-6470 PMID: 8623571 Document Number: 462475
We examined the callus formation during leg lengthening in 7 achondroplastic patients who underwent 3 bilateral femoral and 4 bilateral tibial lengthenings. Bone mineral content and bone mineral density (BMD) in the lengthened callus space were evaluated every 1 or 2 weeks for 10 weeks after the start of distraction using dual energy X-ray absorptiometry. The mean rate of callus mineralization in femurs (0.64 g/wk) was higher than in tibias (0.22 g/wk). The mean BMD at 10 weeks after the start was 0.35 g/cm-2 in the femur and 0.1 4 g/cm-2 in the tibia. Different rates of callus formation in different kinds of long tubular bones have not been reported previously.