Journal of Developmental Biology Review Sonic Hedgehog Signaling and Development of the Dentition Maisa Seppala 1,2, Gareth J. Fraser 3, Anahid A. Birjandi 1, Guilherme M. Xavier 1,2 and Martyn T. Cobourne 1,2,* 1 Centre for Craniofacial and Regenerative Biology, King's College London ...