DENA 1080 TEST #2: Ch 8

The preimplantation period is the first week in which the zygote forms

a. True

b. False

True

The process of tooth formation, called odontogenesis, is divided into 3 primary periods. Those are:

Growth, Calcification, and Eruption

The study of prenatal development in the stages before birth is known as:

Embryology

During the third week of development, the cells of the embryo from the three primary embryotic layers : Ectoderm, Mesoderm, and Endoderm.

a. True

b. False

True

The dense outer covering of the spongy tissues that makes up the central part of the alveolar process is known as:

Cortical palate

Made up blood vessels and nerves that enter the pulp chamber through the apical foramen:

Pulp

The root of the tooth is the portion normally embedded in the alveolar process; it’s covered with dentin.

a. True

b. False

False

Stage in which the different tissues of the tooth form and the shape is established through the processes of histodifferentiation and morphodifferentiation:

Bell

The external link at the neck of the tooth , where the enamel of the crown and cementum of the root usually meet is known as:

CEJ

Designed to support the tooth and its socket and hold it firmly in normal relationship to the surrounding soft and hard tissues are fibers known as Sharpey’s fibers

a. True

b. False

True

The process by which the structural outline of the tooth is formed during the growth stage and hardened by the deposit of calcium or other mineral salts is:

Calcification

Bone is reabsorbed by osteoclasts and laid down by osteoblasts:

a. True

B. False

True

Stage, also known as initiation, which starts with the formation of the dental lamina:

Bud

A fault along a developmental groove on the occlusal surface caused by incomplete or imperfect joining of the lobes during the formation of the tooth is known as :

Fissure

Dentin makes up the anatomic crown of the tooth, and is the hardest material in the body

a. True

b. False

False

Supports the teeth within the alveolar bone and consists of cementum, alveolar bone, and the periodontal ligaments:

Periodontium

The normal process by which primary teeth are lost as succedaneous (permanent) teeth develop is known as:

Exfoliation

Forms after eruption and continues through life of the tooth:

Secondary dentin

The tapered end of each root tip is known as the apex

a. True

b. False

True

The portion of the tooth that is covered with enamel:

Anatomical crown

The most abundant mineral component in enamel that consists of primarily calcium is hydroxyapatite.

a. True

B. False

True

makes up the main portion of the tooth structure, extends almost the entire length of the tooth:

Dentin

Ameloblasts:

Enamel forming cells

Odontoblasts:

Dentin forming cells

Cementoblasts:

Cementum forming cells