Ch 8 Dentistry

• hardest material of the body

• makes up the anatomical crown of the tooth

• makes up the bulk of the tooth

• covered by enamel on the crown and cementum on the root

• rigid connective tissue that covers the root of the tooth

• anchors tooth to the bony socket

• made of blood vessels and nerves

• blood supply derived from branches of dental arteries

• supports, nourishes, and protect the teeth

• consists of cementum, alveolar bone, and periodal ligaments

the hole at the tip of the root where nerves and blood vessels enter the tooth

situated just above the apical foramen

elongations of the coronal pulp

connected with the accessory canal and lies in the crown portion of the tooth

tooth formation begins

cells of the developing tooth increases ; tooth increases in size

different tissues of the tooth form

development of different tooth types or shape

site of earliest signs of tooth development at 5 to 6 weeks

genetic factor that is most often concerned in prenatal development

• also known as decidous teeth

• permanent teeth

movement of the tooth into its functional position in the oral cavity

normal process by which the primary teeth are lost

cells that form bone

cells that resorb bone

a bone cell, formed when an osteoblast becomes embedded in the matrix it has secreted

• cells that produce collagen and other fibers

• permit continuous and rapid remodeling of periodontal ligament

cells that form dentin

cells that form cementum

cells that form enamel

a wearing down over time

occurs in response to forces placed on the tooth in its socket

• environmental agents that harm the embryo or fetus

• infections, radiation exposure, drugs

• first period of prenatal development

• first week to second week

• most critical stage of prenatal development, from second to eighth week

• face and related tissues begin to form

• ectoderm, mesoderm, and endoderm are produced

• branchial arches have formed

• eight weeks to birth

• all primary teeth develop by 17th week

• about 44 teeth developing by birth

part of the tooth that is visible in the mouth

portion of the tooth that is covered with enamel

• outermost embryonic layer

• enamel of teeth

• middle layer

• cementum, dentin, and pulp form

innermost layer

• soft, moist, can stretch and compress

• lines inside of cheeks and underside of tongue

• rubbery and resilient

• lines attached gingiva and upper surface of tongue

located on the top surface of the tongue as papillae

colors of enamel

• formed before eruption

• forms bulk of the root

• begins forming after eruption

• continues very slow formation throughout tooth's lifespan

• formed in response to irritation

• appears as a localized deposit on the wall of the pulp chamber