Chapter 08 Quizs

The genetic factor that is most often of concern during prenatal tooth development is

• failure of the enamel to form properly.

• failure of the dentin to form properly.

• discrepancies in tooth and jaw size.

• Down syndrome.

Which of the following is true of cementum?

• Provides sensation to the tooth.

• Overlies root dentin.

• Forms the bulk of the tooth.

• Transmits pain stimuli from the tooth.

The development of a supernumerary (extra) tooth is considered to be due to which of the following causes?

• Genetic factors

• Nutritional deficiency

• Trauma to the jaw

• Poor oral hygiene

The first signs of tooth development are found in which of the following regions of the developing embryo?

• Maxillary anterior

• Maxillary posterior

• Mandibular anterior

• Mandibular posterior

The __________ is the dense outer covering of the bone of the alveolar process and provides strength for the place where skeletal muscles attach.

• bony projection

• periosteum

• endosteum

• marrow cavity

Which of the following is the correct sequence of the periods of prenatal development?

• Blastula, gastrula, and morula periods

• Preimplantation, embryonic, and fetal periods

• Implantation, ectodermal, and fetal periods

• Conception, zygote, and embryonic periods

Which of the following terms is used to describe a disorder that is present at birth?

• Development anomalies

• Inherited

• Congenital

• Genetic

Negative effects on tooth development due to chromosomal abnormalities are caused by

• genetic disorders.

• environmental factors.

• rubella virus.

• ionizing radiation.

Which statement is not true of dentin?

• Dentin composes the main portion of the tooth structure.

• Dentin extends almost the entire length of the tooth.

• Dentin is characterized by Hunter-Schreger bands.

• Dentin is capable of growth and repair.

Which stage of tooth formation starts with formation of the dental lamina?

• Initiation

• Proliferation

• Histodifferentiation

• Morphodifferentiation