Simmelink J W
J Dent Res. 1982 Dec;Spec No:1483-9.
Evidence for direct fusion of ameloblast secretory granules to the plasma membrane at the enamel forming front is minimal. Typically, secretion granules cluster in the center of the Tomes' process and frequently show continuity with a tubular reticulum containing a similar material. Secretion granules seem to exit primarily by way of plasma membrane invaginations connected to the secretory granule via tubular pseudopodia. Enamel formed initially at the dentino-enamel junction, as well as interrod enamel, is also characterized by enamel matrix release into deep plasma membrane invaginations. This modified type of merocrine secretory process may play a role in enamel crystal orientation.
在釉质形成前沿，成釉细胞分泌颗粒与质膜直接融合的证据极少。通常，分泌颗粒聚集在托姆斯突的中心，并经常与含有类似物质的管状网状结构相连。分泌颗粒似乎主要通过与分泌颗粒通过管状伪足相连的质膜内陷排出。最初在牙本质 - 釉质交界处形成的釉质以及柱间质釉质，其特征还在于釉质基质释放到深层质膜内陷中。这种改良型的局部分泌分泌过程可能在釉质晶体取向中起作用。
