Chapter 7 - Oral Anatomy

Question 1

When teeth are in what phase (tooth formation) they go through three developmental periods called categories: growth, calcification, and eruption? (Pages7-1)

Answer 1

Odontogenesis

Question 2

What describes the tooth as it breaks through the gingival tissue? (Pages 7-1)

Answer 2

Emergence

Question 3

Tooth buds for the permanent teeth form between the 17th- week of fetal life through the age of how many years? (Pages7-1)

Answer 3

5

Question 4

What refers to depositing of the matrix for the hard dental structures? (Page 7-2)

Answer 4

Apposition

Question 5

What is the process by which organic tissue (the matrix formed during apposition) becomes hardened by a deposit of calcium or any mineral salts? (Pages 7-2)

Answer 5

Calcification

Question 6

For permanent teeth, it takes about how many years from crown completion to the time the tooth emerges into the mouth? (Pages 7-2)

Answer 6

3

Question 7

When primary teeth prepare to fall out and make way for the eruption of permanent teeth, they go through a process called what? (Pages 7-4)

Answer 7

Exfoliation

Question 8

What is the study of anatomy including the minute structure, composition, and functions of tissues? (Pages 7-4)

Answer 8

Histology

Question 9

The root of a tooth is covered by cementum and embedded in a thin layer of compact bone that forms the tooth socket; this is called what? (Pages 7-4)

Answer 9

Alveolar bone

Question 10

When teeth have more than one root, the region where the roots separate is called what? (Pages 7-4)

Answer 10

Furcation

Question 11

If a tooth has how many or more roots, it is said to be multirooted? (Pages 7-4)

Answer 11

Four

Question 12

What is a slight indentation that encircles the tooth and marks the junction of the anatomical crown with the root? (Pages 7-5)

Answer 12

Cervix

Question 13

What is the calcified substance that covers the entire anatomic crown of the tooth and protects the dentin? (Pages 7-5)

Answer 13

Enamel

Question 14

What is the hardest tissue in the human body? (Page 7-5)

Answer 14

Enamel

Question 15

Enamel can endure crushing pressure of approximately how many pounds per square inch? (page 7-6)

Answer 15

100,000

Question 16

What constitutes the largest portion of the tooth? (Page 7-6)

Answer 16

Dentin

Question 17

What is the bonelike tissue that covers the roots of the teeth in a thin layer? (Page 7-6)

Answer 17

Cementum

Question 18

What is the soft tissue inside the tooth developed from the connective tissue of the dental papilla? (Page 7-6)

Answer 18

Dental pulp

Question 19

The tissues that surround and support the teeth are collectively called what? (Pages7-7)

Answer 19

Periodontium

Question 20

What is that bony portion of the maxilla and mandible where the teeth are embedded and tooth roots are supported? (Pages 7-7)

Answer 20

Alveolar process

Question 21

What is dense in nature, provides strength and protection, and act as the attachment for a skeletal muscles? (Pages 7-7)

Answer 21

Cortical plate

Question 22

What is a thin layer of compact bone; a specialized continuation of the cortical plate that forms the tooth socket? (Pages7-8)

Answer 22

Alveolar bone proper

Question 23

What is a thin layer, fibrous ligament that connects the tooth to the bony socket? (pages7-8)

Answer 23

Periodontal ligament

Question 24

What is comprised of the tissue that covers the hard palate and the gingival? (Page 7-8)

Answer 24

Masticatory mucosa

Question 25

What aids in the support of the teeth, and protects the alveolar process and periodontal ligament from the bacterial invasion? (page 7-9)

Answer 25

Gingiva

Question 26

What is the mucous membrane on the tongue in the form of lingual papillae, which are structures associated with sensations of taste? (Pages 7-10)

Answer 26

Specialized mucosa

Question 27

The teeth of the upper arch are called what teeth ?( Pages7-10)

Answer 27

Maxillary

Question 28

The teeth in an arch are composed of 6 anteriors (cuspid to cuspid) and how many posterior> (Page 7-10)

Answer 28

10

Question 29

A human receives two sets of teeth during a lifetime. The first set consists of 20 teeth referred to as deciduous or primary (baby teeth). The second (permanent) set usually consists of how many teeth? (Page 7-11)

Answer 29

32

Question 30

What teeth are those located in the front of the mouth, the incisors, and the cuspids? (page 7-11)

Answer 30

Anterior

Question 31

What teeth are those located in the back of the mouth- the bicuspids and molars? (page 7-11)

Answer 31

Posterior

Question 32

The human permanent dentition is divided into how many classes of teeth based on appearance and function or position? (page 7-12)

Answer 32

Four

Question 33

What has a single cusp instead edge and is designed for cutting and tearing? (page 7-13)

Answer 33

Cuspid

Question 34

What have two cusps used for cutting and tearing, and an occlusal surface that is wider to crush food? (page 7-13)

Answer 34

Bicuspids

Question 35

What has four or five cusps, is shorter and more blunt in shape than the teeth, and provides a broad surface for grinding and chewing solid masses of food? (Page 7-13)

Answer 35

Molar

Question 36

What method employs numbers with each tooth designated by a separate number from 1 to 32? (page 7-13)

Answer 36

Universal Numbering System

Question 37

What is the surface of a tooth that "faces" toward the lips or cheeks? (page 7-14)

Answer 37

Facial

Question 38

What is the proximal surface closest to the midline or middle of the arch? (page 7-14)

Answer 38

Mesial

Question 39

What is the proximal surface oriented away from the midline of the arch? (page 7-14)

Answer 39

Distal

Question 40

What is the surface of an anterior or posterior tooth that faces toward the tongue? (page 7-14)

Answer 40

Lingual

Question 41

What surface is the broad chewing surface found on posterior teeth (bicuspids and molars)? (page 7-15)

Answer 41

Occlusal

Question 42

Who was a dentist who developed a classification of normal and abnormal ways teeth meet into centric occlusion? (page 7-18)

Answer 42

Edward Angle

Question 43

What is the study of the form and shape of teeth? (page 7-18)

Answer 43

Tooth morphology

Question 44

In about what percent of maxillary first bicuspids, the root is divided in the apical third? (Page 7-24)

Answer 44

50

Question 45

The first molars are also known as what molars? (page 7-26)

Answer 45

6-year

Question 46

The second molars are often called what molars?(page 7-27)

Answer 46

12-year

Question 47

What molars are called "wisdom teeth" because they erupt when the young adult is passing into adulthood? (page 7-27)

Answer 47

Third

Question 48

What is the first permanent tooth to erupt? (page 7-28)

Answer 48

Mandibular first molar

Question 49

What is a pointed or rounded elevation of enamel found on cuspids and on the chewing surfaces of bicuspids and molars? (Page 7-30)

Answer 49

Cusp

Question 50

What is a convex mount of enamel localized to the cervical one-third of the crown? (page 7-30)

Answer 50

Cingulum

Question 51

What is a linear fault that sometimes occurs in a developmental groove by incomplete or imperfect joining of the lobes? (page 7-30)

Answer 51

Fissure

Question 52

What is a centrally located depression found on the occlusal surface of molars and mandibular second bicuspids? (page 7-32)

Answer 52

Central fossa

Question 53

What is a fissure betwwen the cusps on the crown of the tooth? (page 7-31)

Answer 53

Developmental Groove

Question 54

What are small, rounded projections of enamel from the incisal edges of newly erupted anterior teeth? (page 7-32)

Answer 54

Mamelons

Question 55

What is an elongated valley or depression in the surface of a tooth formed by the inclines of adjacent cusps or ridges? (page 7-34)

Answer 55

Sulcus