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 牙本质龋 Dentin Caries

山东子 ONG UN SHANDONG UNIVERSITY Dentin caries 口腔医学院 Department of Oral Pathology, shandong University

Department of Oral Pathology, Shandong University

Dentin caries o Develops from enamel caries and cementum caries o Pathological progress differs from enamel caries: o Relatively high organic contents-proteolytic break down of the collagenous matrix 2 Contain dentinal tubules--Carious process extend along dentinal tubules, progress rapidly o Pulpodentinal complex--Defence reaction e Cone-shaped lesion, the base at the edj, the apex of the cone towards the pulp cavity Department of Oral Pathology, Shandong University http://1.51.214.13

Department of Oral Pathology, Shandong University 2 http://1.51.214.13  Develops from enamel caries and cementum caries.  Pathological progress differs from enamel caries: ①Relatively high organic contents——proteolytic break down of the collagenous matrix ②Contain dentinal tubules——Carious process extend along dentinal tubules, progress rapidly ①Pulpodentinal complex——Defence reaction  Cone-shaped lesion, the base at the EDJ, the apex of the cone towards the pulp cavity

Dentin caries Department of Oral Pathology, Shandong University http://1.51.214.13

Department of Oral Pathology, Shandong University 3 http://1.51.214.13

山东子 ONG UN SHANDONG UNIVERSITY Early dentin caries under intact enanel surface 口腔医学院 Department of Oral Pathology, shandong University

Department of Oral Pathology, Shandong University

Early dentin caries under intact enamel surface ●T= Translucent zone ●B= Body of the lesion o R=Reparative dentin P o P=Pulp Department of Oral Pathology, Shandong University 5 http://1.51.214.13

Department of Oral Pathology, Shandong University 5 http://1.51.214.13  T=Translucent zone  B=Body of the lesion  R=Reparative dentin  P=Pulp

Early dentin caries under intact enamel surface Translucent zone(透明层) Sclerotic zone(硬化层) Whitlockite or Octacalcium phosphate Department of Oral Pathology, Shandong University 6 http://1.51.214.13

Department of Oral Pathology, Shandong University 6 http://1.51.214.13  Translucent zone (透明层) Sclerotic zone (硬化层) Whitlockite or Octacalcium phosphate

Early dentin caries under intact enamel surface Body of the lesion(病损体部) Dead tract(死区) o Reparative dentin Tertiary dentine Department of Oral Pathology, Shandong University http://1.51.214.13

Department of Oral Pathology, Shandong University 7 http://1.51.214.13  Body of the lesion (病损体部)  Dead tract (死区)  Reparative dentin (Tertiary dentine)

山东子 1901 ONG UN SHANDONG UNIVERSITY Dentin caries beneath enamel cavity 口腔医学院 Department of Oral Pathology, shandong University

Department of Oral Pathology, Shandong University

Dentin caries beneath enamel cavity(tg ●Z= destructive zone ●P= Penetrative zone ●D= Demineralizative zone ●T= Translucent zone ●R= Reparative dentin Department of Oral Pathology, Shandong University http://1.51.214.13

Department of Oral Pathology, Shandong University 9 http://1.51.214.13  Z=destructive zone  P= Penetrative zone  D=Demineralizative zone  T=Translucent zone  R=Reparative dentin

Dentin caries beneath enamel cavity(tg Translucent zone Zone of sclerosis Department of Oral Pathology, Shandong University 10 http://1.51.214.13

Department of Oral Pathology, Shandong University 10 http://1.51.214.13  Translucent zone Zone of sclerosis