Oral Ana 3

Vocabulary flashcards generated from the Unit IV lecture notes on comparative and descriptive human dentition anatomy.

Homodont

Teeth that are similar in size and shape, such as the dentition of a dolphin.

Heterodont

Teeth that differ in appearance and shape along the dental arch, such as the dentition of a fox.

Monophyodont

Having only one set of teeth all throughout life, such as a Beluga whale.

Diphyodont

Having two sets of teeth throughout life; humans are diphyodont, having primary and permanent dentition.

Polyphyodont

Having multiple generations or sets of tooth replacement, where a lost tooth will eventually grow back.

Thecodont

A tooth attachment type where teeth set in sockets with the periodontal ligament; human dentition belongs to this type.

Acrodont

A tooth attachment type where teeth are attached to the top of the bone or in shallow sockets.

Pleurodont

A tooth attachment type where teeth sit on a shelf on the inner side of the jaw bone.

Facial Surface

Refers to the tooth surfaces oriented toward the face, subdivided into labial and buccal surfaces.

Labial Surface

Tooth surfaces toward the lip, applicable only to anterior teeth (incisors and canines).

Buccal Surface

Tooth surfaces toward the cheeks, found in posterior teeth (premolars and molars).

Lingual Surface

Surfaces of the teeth oriented toward the tongue.

Palatal Surface

An alternative term used specifically for the upper arch lingual surface because of its close contact with the hard palate.

Proximal Surface

Surfaces toward adjoining teeth in the same dental arch, divided into mesial and distal surfaces.

Mesial Surface

Proximal tooth surface faced toward the median line.

Distal Surface

Proximal tooth surface faced distant from the median line.

Occlusal Surface

Surfaces of the premolars and molars that come in contact with the opposite jaw during closure; found only in posterior teeth.

Incisal Surface

Surfaces of the incisors and canines that come in contact with the opposite jaw during closure; applicable only to anterior teeth.

Line Angle

An angle formed by the junction of 2 tooth surfaces. Anterior teeth have 6 line angles, while posterior teeth have 8 line angles.

Point Angle

An angle formed by the junction of 3 tooth surfaces. Both anterior and posterior teeth have 4 point angles.

Concave

carved out section

convexity

bulging area or elevation

Lobe

Represents a primary center of formation of the tooth; developmental portions that contribute to the formation of the crown.

Cusp

An elevation or mound on the crown of a tooth that makes up a divisional part of the occlusal surface, commonly found on premolars and molars.

Mamelons

Three rounded protuberances found on the incisal ridges of newly erupted incisors, which usually become less noticeable due to attrition.

Tubercle

A smaller elevation on some portion of the crown produced by an extra formation of enamel.

Cingulum

The lingual lobe of an anterior tooth located in the cervical third of the lingual surface; derived from the Latin word meaning 'girdle'.

Ridge

Any linear elevation on the surface of a tooth, usually named according to its location.

Marginal Ridge

Rounded borders of enamel that form the mesial and distal margins of the tooth; found on occlusal surfaces of posterior teeth and lingual surfaces of anterior teeth.

Incisal Ridge

The rounded ridge of the incisal portion of an anterior tooth that forms the cutting edge of an anterior tooth.

Triangular Ridge

Ridges that descend from the tips of the cusps of molars and premolars toward the central part of the occlusal surface, named because their cross-section resembles a triangle.

Transverse Ridge

A combination of two triangular ridges that transversely cross the occlusal surface (triangular ridge + triangular ridge = transverse ridge).

Oblique Ridge

ridge that cross obliquely across the occlusal surface

Cusp Ridge

Elevations that extend in mesial and distal directions, or buccal and lingual directions.

Inclined Plane

A sloping area found between two cusp ridges.

Fossa

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

Lingual Fossa

A broad, shallow depression on the lingual surface of anterior teeth.

Central Fossa

A broad and deep concavity at the central portion of the occlusal surfaces of molars.

Triangular Fossa

Found on the occlusal surfaces of premolars and molars, located between the branches of the central developmental groove when they terminate before the proximal marginal ridges.

Sulcus

An elongated valley formed by the inclines of adjacent cusps or ridges that meet at an angle.

Groove

A shallow linear depression on the tooth surface.

Developmental Groove

A shallow groove or line between the primary parts of the crown or root that indicates the junction between primary developmental parts.

Supplemental Groove

A less distinct, shallow linear depression on the surface of a tooth that is supplemental to a developmental groove and does NOT mark the junction of primary parts.

Pit

A small pinpoint depression located at the junction of developmental grooves or at the terminal ends of those grooves.

Proximal Contact Area

areas on the surface where proximal surface touches one another. distal contact area touches mesial contact area

Proximal Spaces

triangular shaped spaces between the teeth. ara sa gums mo

Embrasures

Spillways or spaces between the teeth where they diverge buccally, labially, lingually, and occlusally from the contact area.

Height of Contour

widest area; Also known as the crest of curvature; refers to the highest or most prominent point of elevation on a tooth surface.