Presentation on theme: "ORAL CAVITY Oral cavity consists of the mouth and its structures, which include the tongue, teeth and their supporting structures (periodontium), major."— Presentation transcript:
ORAL CAVITY Oral cavity consists of the mouth and its structures, which include the tongue, teeth and their supporting structures (periodontium), major and minor salivary glands, and tonsils. Divided into vestibule and oral cavity proper.
CHEEKS Skin with sebaceous and sweat glands Mucosa lined by Stratified squamous non cornified epithelium Lamina propria is compact, contain papilla and connected by a submucosa to the underlying skeletal muscle. Submucosa has elastic fibers and tubuloalveolar glands
FILIFORM PAPILLAE Most numerous Smallest Evenly distributed Slender core of vascular epithelium Stratified squamous epithelium Secondary projections
FUNGIFORM PAPILLAE Few in number Interspersed among the filiform papillae Rounded summits and broader bases Noncornified epithelium Highly vascular connective tissue
1.STRATIFIED SQUAMOUS NONCORNIFIED EPITHELIUM 2.LAMINA PROPRIA 3.TASTE BUD
FOLIATE PAPILLAE Along the posterolateral border of the tongue there are folds of the mucous membrane, sometimes called the foliate papillae. Not well developed in humans. In some animals,e.g.,rabbits, it constitute the principle site of aggregation of taste buds.
CIRCUMVALLATE PAPILLAE 9-12 in number Resemble fungiform papillae Much larger Surrounded by a trench and a wall Small oval bodies, taste buds
COMPONENTS OF TOOTH Enamel Dentin Cementum Pulp
ENAMEL Consists of Enamel rods Inter rod enamel Secreted by ameloblasts At apical pole------ Tomes process At the base--------- cluster of mitochondria
ENAMEL 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 as hydroxyapatite crystals
DENTIN Calcified tissue harder than boneCalcified tissue harder than bone Dentin is produced by neural crest derived odontoblasts of the adjacent mesenchymeDentin is produced by neural crest derived odontoblasts of the adjacent mesenchyme Sensitive structureSensitive structure