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Criteria to be successful

Last reviewed dd mmm yyyy. Last edited dd mmm yyyy

Successful lengthening requires:

rigid fixation to prevent non-axial stressing
healing to be initiated before distraction - about 5-14 days after surgery
suitable distraction rate - if too slow, the distraction site will unite prematurely; if too quick, the resultant bone will be of poor quality - with cysts and large amounts of fibrous tissue - as in the original procedures devised by Wagner. Suitable rates are 0.25 mm four times per day for callotasis; 0.25 mm twice per day for chondrodiatasis
modification of distraction rate according to osteogenetic potential of the bone - in Ollier's disease, for example, distraction rates should be relatively high since new bone is formed rapidly

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