Oral Ana 1

Vocabulary-style study flashcards for Oral Anatomy covering facial landmarks, oral cavity divisions, teeth, pulp cavity anatomy, and the periodontium based on lecture notes.

Oral Anatomy

The study of the development, morphology, function, and identity of each tooth in the human dentitions, as well as the way in which the teeth relate in shape, form, structure, color, and function to other teeth in the same dental arch and opposing arch.

Oral Vestibule

Maxillary and mandibular horseshoe-shaped spaces bounded externally by the lips and cheek mucosa, and internally by the alveolar process and teeth.

Intermaxillary Junction

where the vestibule communicates with oral cavity during occlusion

Oral Cavity Proper

The space inside the mouth enclosed anteriorly by the dental arches and posteriorly by the oropharynx.

Maxillary Arch

The upper jaw, consisting of two maxillary bones sutured together in a non-movable articulation with facial and skull bones.

Mandibular Arch

The lower jaw, consisting of a singular bone with movable articulation with temporal bones at each temporomandibular joint (TMJ).

Alveolar Process

The bone structure containing the tooth sockets or alveolus

Gingiva or Gums

Fibroepithelial tissue covering the alveolar jawbone that surrounds the teeth.

Teeth

calcified structures for mastication. Each tooth is

composed of crown (portion above gumline) and root

(embedded in jawbone)

Deciduous Dentition

Temporary dentition consisting of 20 teeth.

Permanent Dentition

Adult dentition consisting of 32 teeth.

Tongue

The workhorse structure facilitating ingestion, mechanical digestion, chemical digestion via lingual lipase, sensation, swallowing, and vocalization.

Ducts of Rivanus

Also known as minor sublingual ducts; many small ducts that carry saliva from the sublingual salivary gland to the floor of the mouth.

Bartholin Duct

Also known as the major sublingual duct; the largest duct carrying saliva from the sublingual salivary gland to the floor of the mouth, joining Wharton's duct.

Wharton's Duct

A $5\,\text{cm}$ long tube carrying saliva from the submandibular gland to the mouth, opening under the tongue next to the frenulum.

Frenulum

tiny skin fold

Fovea Palatina

Two small shallow pits or depressions on each side of the midline near where the hard and soft palates meet.

Mandibular Tori

Bumps of extra bone that form on the inside of the lower jaw, under the tongue.

Retromolar Pad

Soft tissue located on the lower jaw just behind the last wisdom tooth.

Linea Alba

Evidence of oral mucosal irritation caused by long-term friction between teeth and the lining of the buccal mucosa.

Fordyce Spots or Sebaceous hyperplasia

Sebaceous hyperplasia presenting as white to yellow macules and papules formed by collections of normal sebaceous glands within the oral cavity.

Pulp Cavity

The entire internal space or central cavity encased by dentin except at the apical foramen.

Pulp Chamber

The coronal portion of the pulp cavity that reflects the external shape of the crown.

Pulp Horns

Landmarks within the pulp cavity that follow the occlusal part of the teeth.

Floor of the pulp chamber

Merges into the root canal at the orifice

Canal Orifice

Openings in the floor of the pulp chamber leading directly into the root canal.

root canal

extends from the orifice to the apical foramen

Accessory Canals

Canals that branch out from the main root canal, mostly seen in apical thirds or in furcation areas of multi-rooted teeth.

Furcation Canals

furcation areas of multi rooted tooth

Lateral Canals

Root canal branches located at right angles to the main root canal.

Apical Delta

Triangular dentinal area formed by the main canal, accessory canal, and external surface of the root apex.

Cemento-dentinal Junction

The point in the canal where cementum and dentin meet, located approximately $0.1\,\text{mm}$ from the apical foramen.

Marginal Gingiva

unattached, also called free gingiva that surrounds each tooth

Attached Gingiva

Firm, immovable tissue bound to the underlying bone

Gingival Groove

aka free gingival groove. shallow line on gum tissue that marks the boundary between the free gingival and attached gingiva

Principal Fibers

Groups of collagen fibers arranged within the periodontal ligament anchoring the tooth to the bone.

Gingival Fiber Group

fibers that do not insert to the alveolar bone

• circumferential fibers

• transseptal fibers

Dentoalveolar Fiber Group

those inserting into aveolar bone

• alveolar crest fibers

• horizontal fibers

• oblique fibers

• periapical fibers

• interradicular fibers

apical fibers and interradicular fibers

Dentoalveolar fibers that are not seen

Cementum

calcified layer of the periodontium that covers the root of the teeth.

Alveolar rest, Interproximal Bone, Interradicular Bone

Parts of Alveolar Bone

Lamina Dura

lines the tooth socket and surrounds the root of a tooth