Oral Anatomy Modules 1-12 Practice Flashcards

Flashcards covering Oral Anatomy key concepts including oral cavity divisions, mucosal structures, paraoral tissues, salivary glands, tooth anatomy, periodontium, dentition periods, and landmarks.

Oral Cavity

The anatomical space bounded by lips anteriorly, cheeks laterally, floor of the mouth inferiorly, and pharynx superiorly where teeth are located.

Mastication

The mechanical process of chewing and breaking down food into smaller pieces by teeth in preparation for ingestion.

Oral Mucosa

The mucous membrane that lines the entire oral cavity, varying in thickness depending on location.

Masticatory Mucosa

A thicker type of oral mucosa with keratinized epithelium subjected to chewing forces, covering the gums and hard palate.

Specialized Mucosa

Type of oral mucosa dedicated to taste sensation, located on the dorsal surface of the tongue.

Lining Mucosa

Thinner, non-keratinized oral mucosa covering non-masticatory areas like the inner lips, cheeks, and floor of the mouth.

Oral Vestibule

Small antechamber space bounded laterally by cheeks and inner lip surfaces, and medially by the alveolar process and teeth.

Alveolar Process

The bone socket extension of the jaw bone that surrounds and anchors the roots of the teeth.

Oral Cavity Proper

The larger inner space of the mouth containing the tongue, bounded peripherally by the alveolar process and teeth.

Fornix Vestibuli

The horseshoe-shaped furrow lined by mucous membrane that forms the boundary between roots of lips/cheeks and the alveolar process.

Mucolabial Fold

The section of the fornix vestibuli located within the lip region.

Mucobuccal Fold

The section of the fornix vestibuli located within the cheek region.

Alveolar Mucosa

Mobile, dark red mucosa characterized by a delicate texture attached adjacent to the fornix vestibuli.

Gingiva

Firm, pale pink, immovable mucosal tissue attached to the bone and surrounding the neck of teeth.

Maxillary Tuberosity

Rounded bony prominence located distal to the upper last molar, forming the posterior end of the upper alveolar process.

Retromolar Papilla

Gingival extension or overgrowth of tissue located immediately behind either the upper or lower last molar.

Retromolar Pad

Tissue overgrowth situated behind and above the mandibular retromolar papilla containing buccal glands.

Frenum

A sagittal fold of mucous membrane connecting the alveolar process to either the lips or cheeks.

Maxillary Labial Frenum

Sagittal fold of tissue in the midline connecting the upper alveolar process to the upper lip.

Mandibular Labial Frenum

Sagittal fold of tissue in the midline connecting the lower alveolar process to the lower lip.

Buccal Frenae

Four folds of tissue (upper right, upper left, lower right, lower left) located near the premolars connecting alveolar process to cheeks.

Pterygomandibular Raphe

Tendinous band stretching obliquely from hamulus to retromolar pad, forming the posterior boundary of cheeks.

Palatine Uvula

Movable bell-shaped mass of tissue in the midline continuous with soft palate assisting closure during swallowing.

Palatopharyngeal Fold

Tissue fold extending from soft palate along pharyngeal walls to pharynx, also termed posterior pillar of fauces.

Palatoglossal Fold

Tissue fold extending from soft palate to lateral base of tongue, also termed anterior pillar of fauces.

Palatine Tonsils

Lymphoid tissues situated between anterior and posterior pillars of fauces that aid immune filtration.

Hard Palate

Anterior bony two-thirds of roof of mouth composed of palatine processes of maxilla and horizontal plates of palatine bones.

Incisive Papilla

Oval or pear-shaped smooth prominence located directly behind maxillary central incisors covering incisive fossa.

Median Palatine Raphe

Narrow, sharp, low ridge extending posteriorly along midline of hard palate from incisive papilla.

Palatine Rugae

Irregular branching ridges radiating laterally from incisive papilla and anterior palatine raphe; transverse palatine folds.

Soft Palate

Posterior movable one-third of palate lacking bone, covered by non-keratinized mucosa rich in glands and vessels.

Palatine Fovea

Two small pits situated near midline directly behind boundary line between hard and soft palates.

Vibrating Line

The boundary junction line separating the hard palate from the movable soft palate.

Hamulus of Pterygoid Process

Small bony prominence at lateral area of root of soft palate producing the hamular bulge.

Torus Palatinus

Non-pathological exostosis or excess bony overgrowth occurring at midline of hard palate.

Mandibular Torus

Non-pathological excess bony overgrowth occurring on lingual side of mandible.

Sublingual Sulcus

Horseshoe-shaped area on floor of mouth surrounding attachment of tongue laterally and anteriorly.

Premylohyoid Sulcus

Shallowest anterior portion of sublingual sulcus extending from canine to canine region.

Mylohyoid Sulcus

Middle portion of sublingual sulcus extending from first premolar up to first molar region.

Retromylohyoid Sulcus

Posterior portion of sublingual sulcus extending from second molar up to posterior wall.

Paraoral Tissues

Structures adjacent to oral cavity that functionally assist in mastication, speech, deglutition, and digestion.

Speech

Ability to express thoughts and feelings by articulating vocalized sounds through the mouth.

Articulation

Formation of clear and distinct speech sounds using vocal organs and oral structures.

Digestion

Breakdown of large food molecules into smaller soluble molecules, initiated in mouth by salivary amylase.

Ingestion

The act or process of taking food or liquid substances into body through mouth.

Deglutition

Reflex action of swallowing food pushing bolus from mouth through esophagus.

Taste

Sensory perception stimulated when dissolved chemical compounds react with taste receptors in tongue papillae.

Respiration

Inhalation of oxygen into body and exhalation of carbon dioxide outwards.

Lips

Two fleshy borders forming entrance to mouth composed of muscles, glands, external skin, and internal mucosa.

Vermillion Border

The red zone transition region of lips covered by specialized squamous epithelium.

Wet Line

Boundary line marking transition between dry vermillion red zone and wet mucosal inner surface of lips.

Nasolabial Groove

Deep depression separating upper lip from cheek extending from ala of nose to corner of mouth.

Labiomental Groove

Deep groove convex superiorly that separates lower lip from chin.

Tubercle of the Upper Lip

Small rounded protrusion located in midline of red zone of upper lip.

Labial Commissure

Thin connecting junction fold of upper and lower lips at corner of mouth.

Philtrum

Shallow vertical groove extending from tubercle of upper lip to nose.

Orbicularis Oris

Principal circular sphincter muscle constituting substance of lips.

Labial Glands

Minor salivary glands in inner mucosal layer of lips secreting fluid to maintain moisture.

Cheeks

Fleshy lateral boundaries of oral vestibule extending posteriorly to pterygomandibular raphe.

Buccinator Muscle

Principal muscular constituent forming inner wall structure of cheeks.

Buccal Fat Pad of Bichat

Fatty tissue cushion situated within cheeks, prominent in infants as suckling pad.

Parotid Papilla

Elevated mucosal flap on buccal mucosa opposite maxillary second molar housing opening of Stensen duct.

Buccal Mucosa

Mucous membrane lining inner surface of cheeks.

Linea Alba

Horizontal white ridge line on buccal mucosa along occlusal plane where teeth meet.

Fordyce Spots

Small yellowish-white granules on buccal mucosa representing ectopic sebaceous glands.

Tongue

Principal muscular organ on floor of mouth functioning in taste, mastication, deglutition, and speech.

Lingual Tonsils

Aggregated lymphoid follicles located on dorsal surface of posterior one-third base of tongue.

Terminal Sulcus

V-shaped groove separating anterior two-thirds body from posterior one-third base of tongue.

Foramen Cecum

Small depression pit located at apex point of V-shaped terminal sulcus on tongue.

Median Sulcus

Shallow midline groove dividing anterior two-thirds dorsal surface of tongue into halves.

Circumvallate Papilla

Large mushroom-shaped papillae arranged in V-line anterior to terminal sulcus sensitive to bitter taste.

Filiform Papilla

Most numerous hair-like papillae providing velvety texture to dorsal tongue; lacks taste buds.

Fungiform Papilla

Dark red mushroom-like dots scattered among filiform papillae housing sweet and salty taste buds.

Foliate Papilla

Parallel fold projections on posterior lateral margins of tongue containing sour taste receptors.

Lingual Frenum

Midline vertical mucosal fold connecting floor of mouth to ventral surface of tongue.

Fimbriated Folds

Scalloped lateral mucosal folds running beside lingual frenum on ventral surface of tongue.

Sublingual Folds

Elevated ridges extending along floor of mouth, also termed plica sublingualis.

Sublingual Caruncle

Papillae elevations on either side of lingual frenum containing major salivary duct orifices.

Genioglossus

Extrinsic tongue muscle originating from genial tubercle that depresses and protrudes tongue.

Styloglossus

Extrinsic tongue muscle originating from styloid process that elevates and retracts tongue.

Palatoglossus

Muscle originating from palatine aponeurosis acting as sphincter between oral cavity and pharynx.

Hyoglossus

Extrinsic tongue muscle originating from hyoid bone that depresses tongue.

Salivary Glands

Exocrine glands secreting saliva containing enzymes like amylase and lysozyme into mouth.

Parotid Gland

Largest major salivary gland located at retromandibular fossa secreting serous fluid via Stensen duct.

Submandibular Gland

Major salivary gland in digastric triangle producing mixed serous saliva via Wharton duct.

Sublingual Gland

Major salivary gland near inner mandibular surface producing mucous saliva via Bartholin duct.

Incisive Glands

Minor salivary glands on floor of mouth behind mandibular incisors near frenum insertion.

Pharyngeal Lymphatic Ring of Waldeyer

Circular arrangement of lymphoid tissue comprising pharyngeal, palatine, and lingual tonsils.

Paranasal Sinuses

Air-filled cavities lined by respiratory epithelium that lighten skull and humidify inhaled air.

Antrum of Highmore

Largest paranasal sinus occupying body of maxilla; also known as maxillary sinus.

Tooth

Hard calcified structure embedded in alveolar sockets of jaws used primarily for mastication.

Crown

Top portion of tooth visible above gingival line in oral cavity.

Anatomical Crown

Portion of tooth covered by enamel extending from cervical line to incisal/occlusal edge.

Clinical Crown

Portion of tooth visible in mouth exposed to oral fluids.

Anatomical Root

Portion of tooth covered by cementum from cervical line to root apex.

Clinical Root

Portion of tooth embedded in periodontium below gingival attachment line.

Cervical Line

Anatomical boundary line separating crown and root portions, termed Cementoenamel Junction (CEJ).

Enamel

Hardest mineralized body tissue ($96-98\%$ calcified) covering dentin of anatomical crown.

Dentin

Elastic calcified tissue ($65-70\%$ mineralized) forming main structural body bulk of tooth.

Cementum

Bone-like tissue ($45-55\%$ calcified) covering anatomical root dentin to attach fibers.