山东大学：《口腔组织病理学》课程教学资源（课件讲稿）第九章 龋病 Chapter 9 Dental Caries 釉质龋 Enamel Caries

Smooth surface caries Translucent zone Department of Oral Pathology, Shandong University http://1.51.214.13

Department of Oral Pathology, Shandong University 11 http://1.51.214.13  Translucent zone

Smooth surface caries o Dark zone >85-90% present >Positive birefringence >Pore volume. 2-4% Department of Oral Pathology, Shandong University 12 http://1.51.214.13

Department of Oral Pathology, Shandong University 12 http://1.51.214.13 Dark zone 85-90% present Positive birefringence Pore volume： 2-4%

Smooth surface caries Body of the lesion >100% present >Positive birefringence >Pore volume. 5-25% Department of Oral Pathology, Shandong University 13 http://1.51.214.13

Department of Oral Pathology, Shandong University 13 http://1.51.214.13 Body of the lesion 100% present Positive birefringence Pore volume： 5-25%