TEETH& ESOPHAGUSTEETH& ESOPHAGUS

Dr IramTassaduq

ANATOMICAL DIVISIONANATOMICAL DIVISION

•CrownCrown

•RootRoot

COMPONENTS OF COMPONENTS OF TOOTHTOOTH

EnamelDentin CementumPulp

ENAMELENAMEL Acellular mineralized

tissue that covers the crown of tooth

Hardest substance in the body

Once formed, can't be replaced

96-98% exist mainly as hydroxyapatite

crystals

CEMENTUMCEMENTUM Covers the dentin

of the root. Pale yellowish Softer and more

permeable Cementocytes sharpey’s fibers

Enamel is produced from ameloblasts of the enamel organ

Dentin is produced by neural crest derived odontoblasts of the adjacent mesenchyme

DENTINDENTIN A calcified material

that forms most of tooth substance

Hard, yellowish, elastic

Lines surface that is in contact with pulp

Secreted by odontoblast

DENTAL PULP & CENTRAL DENTAL PULP & CENTRAL PULP CAVITY (Pulp chamber)PULP CAVITY (Pulp chamber)

Space occupied by pulp (highly vascular and sensitive loose connective tissue

Apical foramen

SUPPORTING TISSUE OF THE SUPPORTING TISSUE OF THE TEETHTEETH

Alveolar bone proper

Periodontal ligament

Gingiva

OVERVIEW OF GITOVERVIEW OF GIT

MUCOSAMUCOSA

FUNCTIONSFUNCTIONS

Protection Absorption Secretion

SUBMUCOSASUBMUCOSA

MUSCULARIS EXTERNAMUSCULARIS EXTERNA

ADVENTITIA/SEROSAADVENTITIA/SEROSA

SUBMUCOSA

MUSCULARIS EXTERNAMUSCULARIS EXTERNA