[Contribution to the morphological study of mouse odontogenesis. Causality of tooth differentiation (author's transl)].

Odontogenesis in mouse is characterized by progressive morphogenesis and cytodifferentiation. Temporal dispacing was observed between the cusps of the same tooth and between lower and upper homologous teeth. These phenomenons underlined the importance of epithelial-mesenchymal interactions and the role of the stage of differentiation reached by the different cells before overt differentiation could be initiated.