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Effect of distraction frequency on bone formation during bone lengthening: a study in chickens



Effect of distraction frequency on bone formation during bone lengthening: a study in chickens



Acta Orthopaedica Scandinavica 74(6): 709-713



We compared the effects of two distraction frequencies on bone formation during tibial lengthening by evaluating radiographs, bone mineral density, and histological findings. In 15 mature White Leghorn chickens, both tibiae were distracted at a rate of 0.75 mm/day for 10 days. The distraction frequency was 2 steps (0.375 mm/12 hour) by hand on the right side and 120 steps (0.00625 mm/12 min) by autodistractor on the left. Serial radiographs showed faster bone formation on the 120-step side than on the 2-step side. Bone mineral density on the 120-step side was also higher than that on the 2-step side at all times. On the 2-step side, endochondral ossification was marked in the early stage of distraction; then intramembranous ossification became the main mechanism of bone formation. On the 120-step side, however, intramembranous bone formation predominated throughout the study. Our findings support the contention that, at least in skeletally mature chickens, an increase in the distraction frequency improves osteogenesis during bone lengthening.

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Accession: 048874495

Download citation: RISBibTeXText

PMID: 14763703

DOI: 10.1080/00016470310018243


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