网络 颈嵴; 齿颈嵴
- HBS mainly located in most labial inner enamel and cingulum of lingual inner enamel while PP located in all the outer enamel, cervical region and incisal ridge.
HSBs主要分布与唇面内层牙釉质和舌隆突部位的内层牙釉质，平行釉柱则分布于所有外层牙釉质、切嵴和颈部。