 However, this was based on a misunderstanding of heterodontosaurid jaw mechanics.It was thought that heterodontosaurids actually did replace their teeth continually, though more slowly than in other reptiles, but CT scanning of skulls from juvenile and mature "Heterodontosaurus" shows no replacement teeth.There is currently no evidence that supports the hypothesis of aestivation in heterodontosaurids, but it cannot be rejected, based on the skull scans.