lab 3 dentition

toward midline

mesial

away from midline

distal

faces the cheek

buccal

faces the tongue

lingual

faces the lips

labial

space between adjacent teeth

interproximal

toot tip of teeth

apical

chewing or biting surface of posterior molars and premolars

occlusal

tooth neck

cervical

cutting edge of front teeth

incisal

visible part of tooth above gumline

crown

part of tooth that extends under gumline

root

dental neck, connects crown and root

cervix

the boundary on a tooth where the enamel of the crown meets the cementum of the tooth

cervicoenamel line (CEJ)

the boundary line between the hard outer layer of a tooth, the enamel, and the layer beneath it, the dentin

dentoenamel junction (DEJ)

hallow space within tooth that holds tooth pulp

pulp chamber

dental procedure to save tooth with infected or inflamed pulp

root canal

opening at tooth’s root where nerves and blood vessels enter

apical foramen

wavy, transverse grooves on surface of tooth enamel

perikymata

incremental lines or bands that appear in tooth enamel

striae of retzius

channels that run from pulp chamber to outer surface of dentin

dentinal tubules

microscopic banding patterns in tooth enamel and dentin that record the rhythms of tooth formation, such as daily and longer-term growth cycles

growth increments

mineralized tissue covering root of tooth, contains cementocytes

cellular cementum

a thin layer of mineralized tissue that covers the cervical (upper) part of the tooth root and does not contain cells

acellular cementum

specialized collagen fibers that play a crucial role in anchoring teeth to alveolar bone (socket)

sharpey’s fibers