abnormal tooth hard tissue morphology abnormal dentinoenamel junction morphology 2017-12-22T12:50:08Z abnormal dentino-enamel junction morphology abnormal amelo-dentinal junction morphology abnormal amelodentinal junction morphology abnormal DEJ morphology abnormal dentin-enamel junction morphology MP:0030511 MPheno.ontology any structural anomaly of the interface that joins two distinct calcified tissues, enamel and dentin; it presents a scalloped contour, with its concave side toward the enamel and the convex side toward the dentin, thought to increase adherence of the enamel to the dentin, especially in areas of occlusal stress; DEJ plays a key role in resisting crack propagation from enamel to dentin