牙本质 组织学结构 牙本质小管 Dentinal tubule 成牙本质细胞突起 Odontoblastic process 细胞间质 Intercellular substance 10 Dept of Oral Pathology, SDU牙本质 组织学结构 牙本质小管 Dentinal tubule 成牙本质细胞突起 Odontoblastic process 细胞间质 Intercellular substance 10 Dept . of Oral Pathology, SDU