During cap stage signalling in the odontogenic epithelium is done by:: (A) Enamel knot., (B) Enamel cord., (C) Enamel septum., (D) Enamel navel.
Answer is A. Recent studies have shown that enamel knot acts as a signaling center as many important growth factors are expressed by the cells of the enamel knot and thus they play an important part in determining the shape of the tooth.