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[An experimental study on the biological basis of cortex-to-cortex bone healing after oblique ramus osteotomy].

This study was designed to elucidate biological basis of cortex-to-cortex bone healing after oblique ramus osteotomy. 12 rhesus monkeys were subjected to oblique ramus osteotomy bilaterally, and the operated sites were examined by microvascular irrigation section and histology techniques. The results showed that, besides the blood supply from the attachment of lateral pterygoid muscles and capsule of temporomandibular joint to the medial segments, the blood supply from the attachment of medial pterygoid muscles also played an important role. Cortex-to-cortex bone healing was achieved by the formation of a large volume of scab surrounding the operated sites. It is concluded that oblique ramus osteotomy has its good biological basis both in blood supply and cortex-to-cortex bone healing process.