JBMS (2125) Dental Anatomy - Lecture 1

Vocabulary flashcards covering dental anatomy definitions, dentition periods, tooth identification systems, surfaces, angles, and anatomical landmarks based on Lecture 1.

Dental Anatomy

The study of the development, morphology, function, and identity of each of the teeth in the human dentitions, and how they relate in shape, form, structure, color, and function to other teeth in the same and opposing arches.

Deciduous Teeth

Also known as baby teeth, consisting of twenty ($20$) primary teeth divided into maxillary and mandibular arches.

Permanent Teeth

A set of thirty-two ($32$) teeth found in the maxillary and mandibular arches of an adult.

Deciduous dentition period

The stage of dentition lasting from six months to six years.

Mixed dentition period

The stage of dentition occurring from six years to fourteen years.

Permanent period

The final stage of dentition beginning from $14$ years onwards.

Federation Dentaire International (FDI) System

A two-digit tooth numbering system where the first digit indicates the quadrant and the second digit indicates the tooth's position in that quadrant.

Buccal surface

The facial surface of posterior teeth, located next to the cheeks.

Labial surface

The facial surface of anterior teeth, located next to the lips.

Lingual surface

The surface of maxillary and mandibular teeth that faces towards the tongue.

Palatal surface

The surface of maxillary teeth that faces towards the palate.

Mesial surface

The surface of the tooth directed towards the midline of the dental arch.

Distal surface

The surface of the tooth farthest from the midline of the dental arch.

Incisal edge

The cutting edge, ridge, or surface found on anterior teeth.

Occlusal surface

The chewing surface found on posterior teeth.

Line angle

An angle formed by the junction of two surfaces, with a name derived from both surfaces.

Point angle

An angle formed by the junction of three surfaces, with a name derived from all three surfaces.

Lobe

One of the primary centers of calcification and growth formed during crown development; every tooth begins development from four or more of these.

Mamelons

Three small rounded enamel projections present in the incisal third of newly erupted permanent incisors.

Cingulum

A bulge found on the cervical third of the lingual surface of the crown in anterior teeth.

Cusps

Pyramidal projections found on the incisal edges of canines and the occlusal surfaces of premolars and molars.

Marginal Ridge

A linear elevation of enamel forming the margin of the tooth surface, located on the mesial/distal margins of lingual surfaces (anterior) or occlusal surfaces (posterior).

Developmental grooves

Sharply defined narrow grooves that separate cusps or the primary parts of teeth.

Supplemental grooves

Small, irregularly placed auxiliary grooves that branch from developmental grooves and do not denote the union of primary lobes.

Fossa

An irregular depression or concavity found on the crown of a tooth.

Fissures

Narrow crevices at the depth of developmental grooves caused by the incomplete fusion of enamel during tooth development.

Pits

Small depressions occurring at a depth of a fossa where two or more grooves join; they are often enamel defects where caries begin.

Anodontia

A dental anomaly characterized by an abnormality in the number of teeth.

Macrodontia

A dental anomaly characterized by an abnormality in the size of the teeth.

Dilaceration

A dental anomaly characterized by an abnormality in the shape of the tooth.