Dental Anat Unit 2

Front 1

T/F: From the facial or lingual aspect, occlusal embrasures decrease in relative size from anterior to posterior teeth.

Back 1

FALSE; embrasures INCREASE in seze from anterior to posterior teeth

Front 2

T/F: Both sides of embrasures on a tooth will have a similar contour.

Back 2

TRUE

Front 3

T/F: From the facial or lingual aspect, the gingival/cervial embrasures decrease in relative size from anterior to posterior teeth?

Back 3

TRUE

Front 4

T/F: From the occlusal aspect, the lingual embrasure is normally smaller then the buccal in posterior teeth?

Back 4

FALSE; lingual embrasure is normally LARGER than buccal embrasure

Front 5

T/F: From an incisal aspect, buccal and lingual embrasures are close to equal in size in anterior teeth?

Back 5

FALSE; LABIAL and lingual embrasures are nearly equal in size in ANTERIOR teeth! (no buccal in anterior teeth)

Front 6

What does height of contour or crest of curvature mean?

Back 6

the greatest area of contour on the facial and lingual surfaces

Front 7

As the contact area moves more cervically in the posterior arch, the relative size of the incisal/occluso embrasure ____, while the relative size of the cervical embrasure ____.

Back 7

increases; decreases

Front 8

As the contact area moves more to the buccal in posterior teeth, the relative size of the lingual embrasure becomes ____.

Back 8

larger

Front 9

What is a marginal ridge?

Back 9

The mesial and distal terminations of the occlusal surfaces of posterior teeth and the lingual surfaces of anterior teeth.

Front 10

Are marginal ridges normally bulkier in the anterior or posterior?

Back 10

Posterior

Front 11

Where should the height of the marginal ridges be located in relation to the adjacent teeth?

Back 11

At the same level as the adjacent marginal ridge
(there are some exceptions)

Front 12

Why are the central developmental grooves of posterior teeth normally aligned into one continuous valley?

Back 12

It creates a more efficient food flow pattern during mastication.

Front 13

T/F: The three major functions of human teeth are mastication, esthetics, and phonetics.

Back 13

True

Front 14

T/F: The periodontium is the hard supporting tissues of a tooth.

Back 14

False. It is both the hard and soft supporting tissues.

Front 15

T/F: The most primitive type of tooth crown is a double lobed/cone conical shape.

Back 15

False. The conical shape is composed of only a single cone or lobe.

Front 16

T/F: A homodont has similarly shaped teeth that differ only in size.

Back 16

True

Front 17

T/F: Animals with conical cusps can only perform up and down or lateral movements with their jaws.

Back 17

False. The conical cusps lock together on closure and only allow an up and down movement.

Front 18

T/F: The periodontium will suffer if the dentist does not pay heed to normal tooth form and alignment.

Back 18

True.

Front 19

T/F: An iatrogenic imperfection is a naturally occurring one.

Back 19

False. It is a dentist-induced imperfection.

Front 20

What is the name of the triangular shaped area between adjacent teeth in the same arch cervical to the contact area?

Back 20

Interproximal space

Front 21

What is the name of periodontuim that fills the interproximal space?

Back 21

Gingival tissue - or more specifically, interdental papilla

Front 22

What are the boudaries of the interproximal space?

Back 22

Alveolar bone at the cervical base, proximal surfaces of the adjacent teeth on its side, and the contact area of the adjacent teeth at the apex.

Front 23

The open space between the proximal surfaces of the two adjacent teeth in the same arch, where they diverge facially or lingually, and incisally (occlusally) or cervically from the contact areas is a/an ____________.

Back 23

embrasure

Front 24

Name the two embrasures seen when viewing the teeth from either the facial or lingual aspects.

Back 24

incisal (occlusal) and cervical (gingival)

Front 25

Name the two embrasures seen when viewing the teeth from the incisal or occlusal aspect.

Back 25

Labial (buccal) and lingual

Front 26

Which embrasure corresponds to the interproximal space?

Back 26

Cervical

Front 27

T/F: The shape, length, and number of root branches are related to a tooth's form and function.

Back 27

True

Front 28

Which tooth has the longest and strongest root in both arches?

Back 28

Canine

Front 29

Why are molars multirooted?

Back 29

to complement the increased size of the occlusal table

Front 30

T/F: A tooth root is NOT directly related to crown form, placement in the arch, and function.

Back 30

False (A tooth root is directly related..)

Front 31

T/F: Roots are widest toward cervical area and taper toward the apex.

Back 31

True

Front 32

How many roots do anterior teeth and premolars normally have?

Back 32

One

Front 33

Although premolars normally have single roots, which premolar is an exception? How many roots does that premolar have? What are the names of the root branches?

Back 33

Maxillary First Premolar
Two
Buccal, Lingual

Front 34

How many roots do Maxillary Molars have?

Back 34

Three (one lingual, two buccal)

Front 35

How many roots do Mandibular Molars have?

Back 35

Two (one mesial, one distal)

Front 36

T/F: The potential for breakdown of the periodontium is directly related to tooth form and function.

Back 36

True