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Oral Region Tony Serino, Ph.D. Clinical Anatomy Oral Cavity Zygomaticus Red Margin Risorius Mentalis 1. Temporalis 2. Masseter 3. Lateral Pterygoid 4. Medial Pterygoid 5. Digastrics 1 3 4 2 Muscles of Mastication 5 Mandible Mylohyoid line Notch Condyle Mandibular foramen Coronoid process Ramus Alveolar process Angle Body Mental foramen Oral Cavity (sagittal) • Mucosa: Stratified Squamous epithelia • Muscularis: Skeletal muscle overlying bone (except for soft palate) • Functions: – – – – – Ingestion Mastication Hydration of food Begins chemical digestion Formation of bolus Oral Cavity (anterior) (Red Margin) Extrinsic Muscles of the Tongue Styloglossus Genioglossus Hyoglossus Tongue Functions: mixing, speaking, and swallowing Intrinsic and extrinsic muscles Foliate papillae Three layers of skeletal muscle. Taste (Gustatory) Sense Tongue Innervation CN X Vagus CN IX Glossopharyngeal CN XII Hypoglossal Motor CN V Trigeminal CN VII Facial Sensory Taste Bud Major Salivary Glands Secrete saliva –mixture of water, mucus, electrolytes, antibodies and enzymes. Enzyme is salivary amylase which breaks down starches. IX VII VII Primary Dentition (20) Adult (Permanent) Dentition (32) Teeth Function: mastication (chewing and grinding of food into a paste consistency) Tooth Anatomy Odontoblasts –secrete dentin Ameloblasts –secrete enamel Pharynx Function: deglutition Mucosa: Str. Squamous Muscularis: Skeletal
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