Question 1

When are the first signs of tooth development found in the anterior mandibular region of the developing embryo?

Accepted Answer

A) Six weeks after the baby is born 
B) During the third trimester of pregnancy 
C) When the embryo is five to six weeks old 
D) At three months of age 
A) Six weeks after the baby is born 
B) During the third trimester of pregnancy 
C) When the embryo is five to six weeks old 
D) At three months of age

Question 2

The root of the tooth is covered with:

Accepted Answer

A) cementum. 
B) dentin. 
C) enamel. 
D) pulp. 
A) cementum. 
B) dentin. 
C) enamel. 
D) pulp.

Question 3

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

Accepted Answer

A) anatomic crown. 
B) clinical crown. 
C) apex. 
D) CEJ. 
A) anatomic crown. 
B) clinical crown. 
C) apex. 
D) CEJ.

Question 4

Which statement is NOT true of succedaneous teeth?

Accepted Answer

A) Succedaneous teeth are permanent teeth. 
B) Succedaneous teeth begin forming at 12 to 14 weeks of gestation. 
C) Succedaneous teeth are only permanent molars. 
D) Succedaneous teeth form during the cap stage of tooth development. 
A) Succedaneous teeth are permanent teeth. 
B) Succedaneous teeth begin forming at 12 to 14 weeks of gestation. 
C) Succedaneous teeth are only permanent molars. 
D) Succedaneous teeth form during the cap stage of tooth development.

Question 5

Variations in the shades or coloring of enamel are caused by _____ the enamel.

Accepted Answer

A) differences in the thickness of 
B) translucency of 
C) color of the dentin beneath 
D) all of the above 
A) differences in the thickness of 
B) translucency of 
C) color of the dentin beneath 
D) all of the above

Question 6

Which of the following statements is true concerning developmental disturbances during tooth formation?

Accepted Answer

A) During prenatal tooth development, the environmental factor that is most often of concern is tooth and jaw size. 
B) During prenatal tooth development, the genetic factor that is most often of concern is tooth and jaw size. 
C) Developmental disturbances can be caused by genetic but not environmental factors. 
D) Developmental disturbances can be caused by environmental but not genetic factors. 
A) During prenatal tooth development, the environmental factor that is most often of concern is tooth and jaw size. 
B) During prenatal tooth development, the genetic factor that is most often of concern is tooth and jaw size. 
C) Developmental disturbances can be caused by genetic but not environmental factors. 
D) Developmental disturbances can be caused by environmental but not genetic factors.

Question 7

Each tooth develops from its own tooth bud,which develops during the ____ stage of tooth development.

Accepted Answer

A) bud 
B) bell 
C) cap 
D) none of the above 
A) bud 
B) bell 
C) cap 
D) none of the above

Question 8

The face begins to develop during the _____ week of pregnancy.

Accepted Answer

A) first 
B) fourth 
C) eighth 
D) twelfth 
A) first 
B) fourth 
C) eighth 
D) twelfth

Question 9

What is the difference between secondary dentin and tertiary dentin?

Accepted Answer

A) Secondary dentin forms before the tooth erupts and continues forming during the life of the tooth while tertiary dentin forms after eruption, making up the bulk of the tooth. 
B) Secondary dentin forms after the tooth is erupted as a response to trauma, while tertiary dentin appears within the wall of the pulp chambers. 
C) Secondary dentin forms after the tooth erupts, forming the bulk of the tooth, while tertiary dentin forms as a response to trauma. 
D) Secondary dentin forms on the apical half of the root, while tertiary dentin forms within the wall of the pulp chambers. 
A) Secondary dentin forms before the tooth erupts and continues forming during the life of the tooth while tertiary dentin forms after eruption, making up the bulk of the tooth. 
B) Secondary dentin forms after the tooth is erupted as a response to trauma, while tertiary dentin appears within the wall of the pulp chambers. 
C) Secondary dentin forms after the tooth erupts, forming the bulk of the tooth, while tertiary dentin forms as a response to trauma. 
D) Secondary dentin forms on the apical half of the root, while tertiary dentin forms within the wall of the pulp chambers.

Question 10

Which statement is NOT true about teratogens?

Accepted Answer

A) Teratogens may cause birth defects. 
B) Drinking alcohol during pregnancy is considered a teratogen. 
C) Taking antibiotics during pregnancy could be considered a teratogen. 
D) Women of childbearing years should avoid teratogens after the second month of pregnancy. 
A) Teratogens may cause birth defects. 
B) Drinking alcohol during pregnancy is considered a teratogen. 
C) Taking antibiotics during pregnancy could be considered a teratogen. 
D) Women of childbearing years should avoid teratogens after the second month of pregnancy.

Question 11

The tough,light pink,keratinized tissue that covers the hard palate and includes the attached gingiva is _____ mucosa.

Accepted Answer

A) specialized 
B) lining 
C) gingival 
D) masticatory 
A) specialized 
B) lining 
C) gingival 
D) masticatory

Question 12

Which statement is NOT true of dentin?

Accepted Answer

A) Dentin makes up the main portion of the tooth structure. 
B) Dentin extends almost the entire length of the tooth. 
C) Dentin is the hardest tissue in the body. 
D) Dentin is capable of growth and repair. 
A) Dentin makes up the main portion of the tooth structure. 
B) Dentin extends almost the entire length of the tooth. 
C) Dentin is the hardest tissue in the body. 
D) Dentin is capable of growth and repair.

Question 13

The primary dentition will begin to form during the _____ month of gestation.

Accepted Answer

A) second 
B) fourth 
C) sixth 
D) eighth 
A) second 
B) fourth 
C) sixth 
D) eighth

Question 14

During the bell stage of tooth development,the odontoblasts form:

Accepted Answer

A) enamel. 
B) dentin. 
C) cementum. 
D) pulp. 
A) enamel. 
B) dentin. 
C) cementum. 
D) pulp.

Question 15

The attachment apparatus that retains the tooth in its functional position in the jaw includes the:

Accepted Answer

A) alveolar bone. 
B) cementum. 
C) periodontal ligaments. 
D) all of the above. 
A) alveolar bone. 
B) cementum. 
C) periodontal ligaments. 
D) all of the above.

Question 16

The process of tooth formation is:

Accepted Answer

A) odontogenesis. 
B) calcification. 
C) eruption. 
D) exfoliation. 
A) odontogenesis. 
B) calcification. 
C) eruption. 
D) exfoliation.

Question 17

The teeth develop in which sequence?

Accepted Answer

A) Mandibular anterior then mandibular posterior 
B) Maxillary anterior then maxillary posterior 
C) Mandibular anterior then maxillary anterior 
D) Maxillary anterior then mandibular posterior 
A) Mandibular anterior then mandibular posterior 
B) Maxillary anterior then maxillary posterior 
C) Mandibular anterior then maxillary anterior 
D) Maxillary anterior then mandibular posterior

Question 18

The _____ within the periodontium.

Accepted Answer

A) cementum connects the alveolar bone and periodontal ligaments 
B) alveolar bone connects the cementum and periodontal ligaments 
C) periodontal ligaments connect the cementum and alveolar bone 
D) cemento-enamel junction connects the alveolar bone and periodontal ligaments 
A) cementum connects the alveolar bone and periodontal ligaments 
B) alveolar bone connects the cementum and periodontal ligaments 
C) periodontal ligaments connect the cementum and alveolar bone 
D) cemento-enamel junction connects the alveolar bone and periodontal ligaments

Question 19

The embedded portions of the periodontal ligament fibers that connect the cementum of the tooth and the bone are called:

Accepted Answer

A) Sharpey's fibers. 
B) gingival fibers. 
C) interradicular fibers. 
D) lamina dura. 
A) Sharpey's fibers. 
B) gingival fibers. 
C) interradicular fibers. 
D) lamina dura.

Question 20

_____ are enamel-forming cells.

Accepted Answer

A) Osteoblasts 
B) Odontoblasts 
C) Cementoblasts 
D) Ameloblasts 
A) Osteoblasts 
B) Odontoblasts 
C) Cementoblasts 
D) Ameloblasts

Exam 8: Oral Embryology and Histology

When are the first signs of tooth development found in the anterior mandibular region of the developing embryo?

The root of the tooth is covered with:

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

Which statement is NOT true of succedaneous teeth?

Variations in the shades or coloring of enamel are caused by _____ the enamel.

Which of the following statements is true concerning developmental disturbances during tooth formation?

Each tooth develops from its own tooth bud,which develops during the ____ stage of tooth development.

The face begins to develop during the _____ week of pregnancy.

What is the difference between secondary dentin and tertiary dentin?

Which statement is NOT true about teratogens?

The tough,light pink,keratinized tissue that covers the hard palate and includes the attached gingiva is _____ mucosa.

Which statement is NOT true of dentin?

The primary dentition will begin to form during the _____ month of gestation.

During the bell stage of tooth development,the odontoblasts form:

The attachment apparatus that retains the tooth in its functional position in the jaw includes the:

The process of tooth formation is:

The teeth develop in which sequence?

The _____ within the periodontium.

The embedded portions of the periodontal ligament fibers that connect the cementum of the tooth and the bone are called:

_____ are enamel-forming cells.

History of Dentistry

The Professional Dental Assistant

The Dental Healthcare Team

Dental Ethics

Dentistry and the Law

General Anatomy

General Physiology

Head and Neck Anatomy

Landmarks of the Face and Oral Cavity

Overview of the Dentitions

Tooth Morphology

Dental Caries

Periodontal Disease

Preventive Dentistry

Nutrition

Oral Pathology

Microbiology

Disease Transmission and Infection Prevention

Principles and Techniques of Disinfection

Principles and Techniques of Instrument Processing and Sterilization

Regulatory and Advisory Agencies

Chemical and Waste Management

Dental Unit Waterlines

Ergonomics

The Patient Record

Vital Signs

Oral Diagnosis and Treatment Planning

The Special Needs and Medically Compromised Patient

Principles of Pharmacology

Assisting in a Medical Emergency

The Dental Office

Delivering Dental Care

Dental Hand Instruments

Dental Handpieces and Accessories

Moisture Control

Anesthesia and Pain Control

Foundations of Radiography, Radiographic Equipment, and Radiation Safety

Digital Imaging, Dental Film, and Processing Radiographs

Legal Issues, Quality Assurance, and Infection Prevention

Intraoral Imaging

Extraoral Imaging

Restorative and Esthetic Dental Materials

Dental Liners, Bases, and Bonding Systems

Dental Cements

Impression Materials

Laboratory Materials and Procedures

General Dentistry

Matrix Systems for Restorative Dentistry

Fixed Prosthodontics

Provisional Coverage

Removable Prosthodontics

Dental Implants

Endodontics

Periodontics

Oral and Maxillofacial Surgery

Pediatric Dentistry

Coronal Polishing

Dental Sealants

Orthodontics