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coronoid, sesamoid articular
The coronomeckelian is a membrane bone that ossifies on Meckel's cartilage where the tendon from the adductor mandibulae A3 inserts (6.1mm). In the adult, the coronomeckelian is a small, irregularly shaped bone that is fused to the dorsomedial surface of the anguloarticular, just dorsal to Meckel's cartilage.