Dental Anatomy: Quiz 2: Unit 2: Review Questions

*When viewing the teeth of either side of the mouth from the facial aspect, the upward curve of the cusp tips from canine to third molar is called the:

Curve of Spee

The gingival line of a tooth:

1. is the same thing as the epithelial attachment

2. always separates the anatomical crown and root

3. Is always located at the same level as the CEJ

4. Is always found at the same level throughout life

5. Always separates the clinical crown and root

5. Always separates the clinical crown and root

The term "periodontium" refers to:

1. the alveolus of a tooth

2. the gingiva surrounding a tooth

3. the periodontal membrane of a tooth

4. All of the above

5. None of the above

4. All of the above

*The tooth type, whose length has been greatly reduced in man's dentitions, when compared to that of many other animals, is the:

Canine

The incisal edges of anterior teeth are most directly related to the major function of the human dentition which is known as:

Mastication

Of the following choices, the crown surfaces of permanent teeth which exhibit a general shape that is trapezoidal, with the longer parallel side of the trapezoid (base) toward the incisal or occlusal, include:

1. proximal surfaces of anterior teeth

2. facial surfaces of anterior teeth

3. proximal surfaces of maxillary posterior teeth

4. proximal surfaces of mandibular posterior teeth

5. none of the above surfaces

2. facial surfaces of anterior teeth

A permanent tooth which has a crown that exhibits proximal surfaces with a generally rhomboidal shape:

1. is found in the maxillary arch

2. could be either an anterior or posterior tooth

3. also has a facial surface which exhibits a rhomboidal shape

4. also has a lingual surface which exhibits a triangular shape

5. has a masticatory function of grinding

5. has a masticatory function of grinding

*When compared to the contact areas on tooth #24, those of tooth #29:

1. are generally smaller in size

2. are more incisally (occlusally) located

3. are more facially located

4. exhibit all of the above features

5. exhibit none of the above features

3. are more facially located

As viewed from the facial aspect, the triangular space which is bounded by two adjacent teeth and the alveolar bone, and is filled primarily with gingival tissue, is:

1. found only in the posterior teeth

2. correctly termed the interproximal space

3. located occlusal to the contact area

4. sometimes called the occlusal embrasure

5. of no consequence to the health of the periodontium

2. correctly termed the interproximal space

If the incisor area of the mandibular arch is viewed from the incisal aspect, the embrasures between any pair of adjacent teeth which are clearly outlined, are the ____________ and ____________ embrasures.

Labial and lingual embrasures

The permanent maxillary first molar crown is normally composed of how many lobes?

4 lobes

*The cingulum of anterior teeth represents the: (which lobe?)

lingual lobe

The height of contour on the lingual surface of tooth #6 is found in the same third of the crown as that on the:

(1) lingual surface of tooth #13.

(2) facial surface of tooth #2.

(3) lingual surface of tooth #20.

(4) lingual surface of tooth #31.

(5) lingual surface of tooth #14.

2. facial surface of tooth #2

Of the following tooth surfaces, the one that normally exhibits a crest of curvature which is located in the occlusal third of the crown, is the:

(1) facial of tooth # 12.

(2) lingual of tooth # 29.

(3) facial of tooth # 8.

(4) lingual of tooth # 22.

(5) facial of tooth # 18.

2. lingual of tooth #29

On the distal of tooth #8, the cervical line:

(1) has a greater depth of curvature than on the mesial of the same tooth.

(2) curves convexly toward the apical.

(3) has less depth of curvature than the cervical line on the mesial of tooth # 4.

(4) is a straight line, therefore lacking any depth of curvature.

(5) has a greater depth of curvature than the cervical line on the mesial of tooth # 11.

5. has a greater depth of curvature than the cervical line on the mesial of tooth #11

*Of the following permanent maxillary teeth, the one whose cervical line theoretically exhibits the greatest depth of curvature on all surfaces is the:

(1) first premolar.

(2) central incisor.

(3) second molar.

(4) canine.

(5) first molar.

2. Central incisor

*Of the following permanent teeth, the one which is normally multirooted is:

1. 6

2. 29

3. 24

4. 13

5. 5

5. #5

From the proximal aspect of a maxillary premolar, the height of contour is located in the correct third of the crown on:

(1) the buccal surface, but not the lingual surface.

(2) the lingual surface, but not the buccal surface.

(3) both buccal and lingual surfaces.

(4) neither buccal nor lingual surfaces.

1. The buccal surface, but not the lingual surface

As viewed from the incisal aspect, the mesiolabial line angle of tooth #8 is normally:

(1) less prominent than the mesiolingual line angle of the same tooth.

(2) a facial limitation of the lingual embrasure.

(3) located more to the lingual than the mesiolabial line angle of tooth # 9.

(4) the junction of the mesial and lingual surfaces.

(5) important to the concept of symmetrical embrasure form.

5. important to the concept of symmetrical embrasure form

An axial position which produces great lingual root inclination is normally present in:

1. maxillary anteriors

2. mandibular anteriors

3. maxillary molars

4. all of the above

5. none of the above

4. all of the above

*Curvatures of the teeth in the dental arches which are considered to be 3D include those of:

(1) the Curve of Wilson.

(2) the compensating occlusal curvature.

(3) the Curve of Spee.

(4) all of the above.

(5) none of the above.

2. the compensating occlusal curvature

The structure formed by the junction of the dentin and the enamel of a tooth is termed:

(1) the epithelial attachment.

(2) the gingival line.

(3) the line of Retzius.

(4) the CEJ.

(5) none of the above.

5. none of the above

A termed used to describe all the supporting tissues of a tooth is:

Periodontium

The tooth type, whose length has been greatly reduced in man's dentitions when compared to that of many other animals, is the:

Canine

*The major function of the human dentition which relates directly to the utilization of food by the body is:

Mastication

*Besides mesial, those surfaces of permanent incisor crowns which are generally triangular in shape, include:

distal surfaces

In addition to the proximal surfaces of the crowns of mandibular posteriors, other surfaces of permanent teeth which are generally rhomboidal in shape include:

(1) proximal surfaces of anterior teeth.

(2) proximal surfaces of maxillary posterior teeth.

(3) facial surfaces of anterior teeth.

(4) all of the above surfaces.

(5) none of the above surfaces.

5. none of the above

When compared to the contact areas on tooth #24, those of tooth #29:

(1) are generally smaller in size.

(2) are more incisally (occlusally) located.

(3) are more facially located.

(4) exhibit all of the above features.

(5) exhibit none of the above features.

3. are more facially located

The interproximal space is a triangular-shaped region normally filled with that portion of the gingiva known specifically as the:

Interdental papilla

*When viewing the maxillary molar area from the facial aspect, the embrasures between any pair of adjacent teeth which are clearly visible, are the:

Occlusal and cervical embrasures

*On the crowns of permanent maxillary molars, the buccal lobes are separated from the lingual lobes by the:

Central groove

The crowns of permanent mandibular incisors always have the same number of lobes as the crowns of:

(a) mandibular first molars.

(b) mandibular second premolars.

(c) maxillary first premolars.

(1) c only.

(2) a, b

(3) a, c

(4) b, c

(5) a, b, c

1. C only

*If the contour of the facial or lingual crest of curvature of a a tooth crown is inadequate, it is likely that the gingival tissue in that area will be: (over/under)protected and (over/under)stimulated

Underprotected and overstimulated

On the crowns of maxillary premolars, the height of contour is normally located in the middle third on: (which surface/s?)

The lingual surface only

*The cervical line is convex toward the occlusal on:

(1) the facial surface of tooth # 2.

(2) the lingual surface of tooth # 29.

(3) the facial surface of tooth # 9.

(4) all of the above tooth surfaces.

(5) none of the above tooth surfaces.

5. none of the above tooth surfaces

Of the following permanent maxillary teeth, the one whose cervical line theoretically exhibits the greatest depth of curvature on all surfaces is the:

(1) first premolar.

(2) central incisor.

(3) second molar.

(4) canine.

(5) first molar.

2. Central incisor

Roots of teeth are normally widest near the:

Cervical line

In a diagram from the mesial aspect of a maxillary premolar, the crest of curvature is located in the correct third of the crown on:

(1) the buccal surface, but not the lingual surface.

(2) the lingual surface, but not the buccal surface.

(3) both buccal and lingual surfaces.

(4) neither buccal nor lingual surfaces.

3. both buccal and lingual surfaces

Of the following features, the one which normally has little or no effect on the embrasure form between two adjacent teeth in the same arch is:

(1) occlusal groove pattern.

(2) marginal ridge height.

(3) marginal ridge form.

(4) location of contact area.

(5) rotation of either tooth.

1. Occlusal groove pattern

The axial position of mandibular molars produces inclination of the roots toward the: (Which surfaces?)

Buccal and distal

The terms "cemento-enamel junction" and "cervical line" refer to:

(1) the same thing.

(2) distinctly different entities.

(3) entities which may or may not be the same, depending on the level of the gingival tissues.

(4) the gingival crest.

(5) the epithelial attachment.

1. The same thing

The epithelial attachment of a tooth normally:

(1) is a portion of the periodontium.

(2) involves the tooth's alveolus.

(3) connects the periodontal membrane to the tooth.

(4) is always found at the same level on that tooth.

(5) is the line of separation of the clinical crown and clinical root.

1. is a portion of the periodontium

*Of the following animals, the one which should have the greatest range in its lateral jaw movements is:

(1) the alligator.

(2) the monkey.

(3) the bear.

(4) the dog.

(5) man.

5. man

Permanent teeth that normally exhibit a facial crown surface which is trapezoidal in shape, with the base of the trapezoid at the incisal or occlusal include:

(1) mandibular molars.

(2) maxillary incisors.

(3) mandibular premolars.

(4) all of the above teeth.

(5) none of the above teeth.

4. all of the above

Of the following possible shapes for facial surfaces of permanent teeth, the one which is generally responsible for the creation and location of interproximal spaces and contact areas is:

(1) triangular, with the base at the cervical.

(2) trapezoidal, with the base at the incisal or occlusal.

(3) rhomboidal.

(4) trapezoidal, with the base at the cervical.

(5) triangular, with the base at the incisal or occlusal.

2. Trapezoidal, with the base at the incisal or occlusal

Permanent teeth whose crowns are normally composed of four lobes include:

(1) maxillary anterior teeth.

(2) mandibular anterior teeth.

(3) mandibular second molars.

(4) all of the above teeth.

(5) none of the above teeth

4. all of the above teeth

*Mamelons represent evidence of the separation of the:

Labial lobes of incisors

The height of contour on the lingual surface of tooth #6 is found in the same third of the crown as that on the:

(1) lingual surface of tooth #13.

(2) facial surface of tooth #2.

(3) lingual surface of tooth #20.

(4) lingual surface of tooth #31.

(5) lingual surface of tooth #14.

2. facial surface of tooth #2

On the crowns of maxillary premolars, the height of contour is normally located in the cervical third on:

(which surface?)

The facial surface

Of the following permanent tooth surfaces, the one that exhibits a cervical line which has a curvature that is convex toward the incisal is:

(1) the facial of tooth # 11.

(2) the labial of tooth # 8.

(3) the mesial of tooth # 9.

(4) the lingual of tooth # 7.

(5) the lingual of tooth # 10.

3. the mesial of tooth #9

Of the following groups of permanent teeth, the group in which all members normally exhibit a single root is the:

(1) maxillary anteriors.

(2) maxillary premolars.

(3) maxillary molars.

(4) mandibular molars.

1. maxillary anteriors

When the maxillary anterior teeth are viewed from the

incisal aspect, the location and prominence of the facial

line angles on adjacent teeth affects the shape of the:

(1) interproximal space.

(2) gingival embrasure.

(3) lingual embrasure.

(4) incisal embrasure.

(5) labial embrasure.

5. labial embrasure

The axial position of mandibular molars produces inclination of the roots toward the: (which surfaces?)

Buccal and distal

The Sphere of Monson is also known as the:

4. compensating occlusal curvature

The gingival line of a tooth is :

(1) always found at the same level on that tooth.

(2) always found at the same level as the cervical line on that tooth.

(3) always the line of separation of the anatomical crown and root.

(4) never found at the same level as the epithelial attachment on that tooth.

(5) never found at the same level as the cervical line on that tooth.

4. never found at the same level as the epithelial attachment on that tooth

Of the following entities, those which are often found at different levels on the same tooth throughout life are:

(1) epithelial attachments only.

(2) cervical lines and gingival crests only.

(3) cervical lines and epithelial attachments only.

(4) gingival crests and epithelial attachments only.

(5) cervical lines, gingival crests, and epithelial attachments.

4. gingival crests and epithelial attachments only

*The most primitive vertebrates which possess teeth would

be expected to exhibit dental mechanisms which have:

(1) conical teeth plus lateral jaw movements.

(2) four-lobed teeth plus hinge action jaw movements.

(3) tritubercular teeth plus hinge action jaw movements.

(4) conical teeth plus hinge action jaw movements.

(5) four-lobed teeth plus lateral jaw movements.

4. conical teeth plus hinge action jaw movements

The labial surfaces of the maxillary incisors are most

closely associated with the major function of the

human dentition known as:

Esthetics

The crowns of the teeth in the human dentition which

function in mastication primarily by tearing and biting

exhibit an outline which has a:

(1) trapezoidal shape when viewed from the mesial aspect.

(2) rhomboidal shape when viewed from the distal aspect.

(3) triangular shape when viewed from the labial aspect.

(4) rhomboidal shape when viewed from the lingual aspect.

(5) triangular shape when viewed from the mesial aspect.

5. triangular shape when viewed from the mesial aspect

A permanent tooth which has a crown that exhibits

proximal surfaces with a generally rhomboidal shape:

(1) is found in the maxillary arch.

(2) could be either an anterior or posterior tooth.

(3) also has a facial surface which exhibits a rhomboidal shape.

(4) also has a lingual surface which exhibits a triangular shape.

(5) has a masticatory function of grinding.

5. has a masticatory fxn of grinding

Consider the following two statements.

(a) Contact areas serve as "stabilizers" for the dental arches.

(b) The size of the contact areas remains constant throughout a person's lifetime.

(1) Statement (a) is true and statement (b) is false.

(2) Statement (a) is false and statement (b) is true.

(3) Both statements are true.

(4) Both statements are false.

1. Statement (a) is true and statement (b) is false

The cervical base (or floor) of the triangular-shaped interproximal space is:

The alveolar process

When viewing the maxillary molar area from the facial aspect, the embrasures between any pair of adjacent teeth which are clearly visible are the:

occlusal and cervical embrasures

Permanent teeth whose crowns are normally composed of four lobes include:

(1) maxillary anterior teeth.

(2) mandibular anterior teeth.

(3) mandibular second molars.

(4) all of the above teeth.

(5) none of the above teeth

4. All of the above

The height of contour of both the facial and lingual surfaces of the crown is normally found in the cervical third on:

(1) tooth # 12.

(2) tooth # 31.

(3) tooth # 26.

(4) tooth # 3.

(5) tooth # 18.

3. Tooth #26

Of the following tooth surfaces, the one which has the greatest depth of curvature of its cervical line is the:

(1) mesial of tooth # 10.

(2) distal of tooth # 6.

(3) mesial of tooth # 8.

(4) distal of tooth # 22.

(5) mesial of tooth # 26.

3. mesial of tooth #8

Marginal ridges are normally present on the crowns of:

All anterior and posterior teeth

The most important purpose of the axial positions of the teeth involves:

(1) stabilization of the arches.

(2) proper incisal and occlusal contact.

(3) prevention of food packing between teeth.

(4) proper food flow patterns.

(5) proper phonetics.

2. Proper incisal and occlusal contact

The 2D curve which arcs upward in the anterior-posterior dimension of the posterior teeth of each side of the mouth is known as the:

Curve of Spee

The gingival margin of a tooth ALWAYS has:

(1) the same location as the cervical line.

(2) a location on the anatomical root.

(3) the same location as the gingival line.

(4) a location on the anatomical crown.

(5) the same location as the epithelial attachment.

3. the same location as the gingival line

The epithelial attachment is most often located:

at the same level on the tooth as the cervical line

The crowns of maxillary posterior teeth normally exhibit

a trapezoidal outline, when viewed from which aspect(s)?

Buccal, mesial, and lingual aspects

When compared to the proximal contact areas on tooth # 25,

those on tooth # 30:

(1) are generally larger in size.

(2) are more incisally (occlusally) located.

(3) are more lingually located.

(4) exhibit all of the above features.

(5) exhibit none of the above features.

1. Are generally larger in size

As any pair of adjacent teeth in the same arch is viewed

from the facial or lingual aspect, the triangular-shaped

area gingival to the contact area is known as:

(1) the interproximal space.

(2) the cervical embrasure.

(3) either the interproximal space or cervical embrasure.

(4) something different from either the interproximal space or cervical embrasure.

3. either the interproximal space or cervical embrasure

Permanent teeth whose crowns are normally composed of

three lobes include:

(1) maxillary incisors.

(2) maxillary premolars.

(3) maxillary molars.

(4) all of the above teeth.

(5) none of the above teeth.

5. None of the above

If the contour of the facial or lingual crest of curvature

of a tooth crown is excessive, it is likely that the gingival tissue in that area will be (over/under)stimulated and (over/under)protected:

Understimulated and overprotected

On the crowns of maxillary premolars, the height of

contour is normally located in the middle third on:

(1) the facial surface only.

(2) the lingual surface only.

(3) both facial and lingual surfaces.

(4) neither facial nor lingual surfaces.

2. the lingual surface only

On the mesial surface of #13, the depth of curvature of the cervical line is:

(1) greater than that on the mesial surface of tooth # 6.

(2) less than that on the mesial surface of tooth # 11.

(3) the same as that on the mesial surface of tooth # 6.

(4) the same as that on the mesial surface of tooth # 11.

(5) greater than that on the mesial surface of tooth # 5.

2. less than that on the mesial surface of tooth #11

Of the following permanent tooth surfaces, the one which

theoretically exhibits the least depth of cervical line

curvature is the:

(1) labial surface of tooth # 6.

(2) mesial surface of tooth # 29.

(3) distal surface of tooth # 10.

(4) buccal surface of tooth # 12.

(5) lingual surface of tooth # 17.

5. lingual surface of tooth #17

Permanent teeth which normally exhibit mesial and distal root branches are:

mandibular molars

In the diagram from the proximal aspect of a permanent

maxillary incisor, the crest of curvature is located in

the correct third of the crown on:

(1) the labial surface, but not the lingual surface.

(2) the lingual surface, but not the labial surface.

(3) both labial and lingual surfaces.

(4) neither labial nor lingual surfaces.

2. The lingual surface, but not the labial surface

Consider the following two statements.

(a) Marginal ridges normally are bulkier on anterior teeth, as compared to posterior teeth.

(b) For proper embrasure form, marginal ridges of adjacent teeth should be the same height.

(1) Statement a is correct and statement b is incorrect.

(2) Statement b is correct and statement a is incorrect.

(3) Both statements are correct.

(4) Both statements are incorrect.

2. Statement b is correct and statement a is incorrect

The inclination of the teeth, in relation to the vertical long axis, is a definition of the:

Axial position

The junction of the enamel and the cementum, which is a stable entity of the tooth, is termed the:

Cervical line

The epithelial attachment of a tooth normally:

(1) is a portion of the periodontium.

(2) involves the tooth's alveolus.

(3) connects the periodontal membrane to the tooth.

(4) is always found at the same level on that tooth.

(5) is the line of separation of the clinical crown and clinical root.

1. is a portion of the periodontium

Permanent incisors normally exhibit a crown which has a:

(1) rhomboidal shape from the mesial aspect.

(2) trapezoidal shape from the distal aspect.

(3) triangular shape from the labial aspect.

(4) rhomboidal shape from the facial aspect.

(5) trapezoidal shape from the lingual aspect.

5. Trapezoidal shape from the lingual aspect

A tooth crown surface which is trapezoidal in shape,

with the base of the trapezoid at the cervical,

would be:

(1) found only in the maxillary arch.

(2) a facial surface.

(3) found only on an anterior tooth.

(4) found in both the maxillary and mandibular arches.

(5) found in both anterior and posterior teeth.

1. found only in the maxillary arch

Of the following crown surfaces of permanent teeth, the

largest contact area in size is most likely found on the:

(1) mesial surface of tooth # 9.

(2) distal surface of tooth # 7.

(3) distal surface of tooth # 23.

(4) mesial surface of tooth # 21.

(5) mesial surface of tooth # 2.

5. mesial surface of tooth #2

*The triangular boundary of the interproximal space is

made up of all of the following, except the:

(1) alveolar process.

(2) marginal ridges of adjacent teeth.

(3) contact area of adjacent teeth.

(4) proximal surfaces of adjacent teeth.

2. marginal ridges of adjacent teeth

When two adjacent posterior teeth in the same arch are viewed from the occlusal aspect, the two embrasures which can clearly be seen are the:

Buccal and lingual embrasures

On the facial and lingual crown surfaces of the permanent anterior teeth, the crest of curvature occurs in the (which third?):

Cervical third

The crest of curvature on the crown is normally found in

the cervical third of the facial surface, and the middle

third of the lingual surface on:

(1) tooth # 8.

(2) tooth # 27.

(3) tooth # 11.

(4) tooth # 5.

(5) tooth # 23.

4. Tooth #5

On the mesial surface of tooth # 4, the cervical line has

a depth of curvature which is:

(1) greater than the curvature on the distal surface of the same tooth.

(2) greater than the curvature on the mesial surface of tooth # 5.

(3) the same as the curvature on the mesial surface of tooth # 5.

(4) the same as the curvature on the distal surface of the same tooth.

(5) less than the curvature on the mesial surface of tooth # 15.

1. Greater than the curvature on the distal surface of the same tooth

Of the following permanent maxillary teeth, the one whose

cervical line theoretically exhibits the greatest depth

of curvature on all surfaces, is the:

(1) first premolar.

(2) central incisor.

(3) second molar.

(4) canine.

(5) first molar.

2. Central incisor

As a generalization from what has been studied regarding tooth location and evolution, the tooth type which should exhibit the longest and strongest root is the:

Canine

Of the following features, the one which normally has

little or no effect on the embrasure form between two

adjacent teeth in the same arch, is:

(1) occlusal groove pattern.

(2) marginal ridge height.

(3) marginal ridge form.

(4) location of contact area.

(5) rotation of either tooth.

1. Occlusal groove pattern

The axial position of mandibular molars produces inclination of the roots toward the: (which surfaces?)

Buccal and distal

Of the following structures, the one which is

theoretically never found at the same level on a tooth

as the gingival line, is the:

(1) cervical line.

(2) CEJ.

(3) anatomical root.

(4) anatomical crown.

(5) epithelial attachment.

5. Epithelial attachment

Of the following, the one which is NOT a major function

of the human dentition, is:

(1) esthetics.

(2) phonetics.

(3) mastication.

(4) periodontics.

4. Periodontics

From the distal aspect, the crown of the permanent

maxillary canine exhibits a general shape which is:

(1) triangular, with the base at the cervical.

(2) triangular, with the base at the incisal.

(3) rhomboidal.

(4) trapezoidal, with the base at the incisal.

(5) trapezoidal, with the base at the cervical.

1. Triangular, with the base at the cervical