[Additive medial osteotomy of the tibia locked with a coral callus. First results apropos of 38 operations].

We inserted a calibrated coral callus to lock addive medial osteotomy of the tibia in 38 patients. We followed these patients for 1 to 6 years evaluating clinical, radiological and histological outcome. Rehabilitation was very insufficient. In our later cases, the porosity of the coral insert was improved, apparently facilitating bone penetration.