dental anatomy

during prenatal development, the joining of embryonic tissues of two separate surfaces, the elimination of a groove between two adjacent swellings, or a dental developmental disturbance in which two adjacent tooth germs unite to form a large tooth

union of the root structure of two or more teeth through the cementum only

developmental disturbance that occurs because the single tooth germ tries to unsuccessfully divide, resulting in a large single rooted tooth

normal variation of bown growth noted on the lingual aspect of the mandibular arch

normal variation of bone growth noted on the midline of the hard palate

normal variation in bone growths noted usually on the facial surface of the alveolar process of the maxilla

socket of the tooth

epithelial tissue with excessive production of keratin

hard tooth tissue loss caused by tooth to tooth contact during mastication or parafunctional habits

hard tissue loss through chemical means, not involving bacteria

hard tooth tissue loss due to friction from tooth brushing and tooth paste

crown or roots showing angular distortion

developmental disturbance in permanent incisors caused by congenital syphilis, which leaves the incisors with screw driver shaped crowns

the greatest elevation of the tooth, either incisocervically or occlusocervically on a specific surface of the crown

accessory cusps on the cingulum of certain anterior teeth or occlusal tables of permanent molars

one or more major elevations on the masticatory surface of canines and posterior teeth

shallow, wide depressions on the lingual surface of anterior teeth or on the occlusal table of posterior teeth

complete displacement of the tooth from the socket because of extensive trauma to the area

open contact that can exist between the permanent maxillary incisors

rounded enamel extensions on the incisal ridge from the labial or lingual veiws of certain anterior teeth

spaces between certain primary teeth

space created when the primary molars are shed to make room for the much smaller mesiodistal permanent premolars

interproximal space when it is not filled with the interdental papilla

spaces between the teeth that are occlusal to the contact areas, named for the location relative to the contact area

small, yellowish elevations on the mucosa resulting from deeper deposits of sebum from trapped or misplaced sebaceous glands

natural movement of all the teeth over time toward the midline of the oral cavity

If imaginary planes are placed on the masticatory surfaces of each dental arch, the maxillary arch is convex occlusally, and the mandibular arch is concave, producing an anteroposterior curvature

concave curve results when frontal section is taken through each set of both maxillary and mandibular molars, the firsts, seconds, then thirds

process that occurs in a cell in which the nucleus moves away from the center to a position farthest away from the basement membrane