Midterm review questions

if two triangular ridges join, what is the entire ridge called

transverse ridge

in a facial view of a maxillary central incisor, vertical lines may divide the crown into thirds called 1. Mesial, 2. middle and 3. ______

distal

on incisors, the number of lobes on the facial surface is

3

the borders of the lingual fossa of the maxillary lateral incisor are the cingulum, the distal marginal ridge, the incised edge or ridge, and the

Mesial marginal ridge

the spaces formed around the point of contact between proximal surface of adjacent teeth are called

embrasures

true or false? the CEJ curves more Mesial of the tooth than on the distal

true

true or false? the facial height of contour of tooth #8 is located in the middle third of the crown

false

what is the correct order of anatomic landmarks of a tooth with two roots beginning at the CEJ and moving toward the root tip

cervix, trunk, furcation, apex

when referring to mandibular anterior tooth surfaces, what is another term for facial surfaces

labial

when referring to maxillary tooth surfaces, what term is the same as lingual

palatal

which tissue makes up the majority of the bulk of the tooth

dentin

which tooth crowns have the lingual crest of the curvature located in the middle third

all posterior teeth only

which tooth structure is hardest

enamel

____ are rounded incisor extensions of the labial lobes found on newly erupted or unworn permanent incisor teeth

mamelons

compared to permanent maxillary lateral incisors, maxillary central incisors are more likely to exhibit

a root that is almost the same length as the crown

the marginal ridges and cingulum of the permanent maxillary central incisor are ____ than those of the permanent maxillary lateral incisor

less prominent

when viewed from the facial aspect, the mandibular central incisor is ____ mandibular lateral incisor

narrower

which of the following incisors is symmetrical

mandibular central incisor

which incisor is the smaller tooth in the mouth

mandibular central incisor

which incisor is normally the widest mesiodistally

maxillary central incisor

which of the following characteristics is normally seen on ALL types of permanent incisors

the labial height of contour is in the cervical 3rd

which statement is true regarding all lateral incisors

the mesioincisal angles are more square than the distoincisal angles

which tooth has the shortest root relative to its crown

maxillary central incisor

the crown of the permanent maxillary canine is ____ the crown of the permanent mandibular canine

shorter than

true or false? a distinguishing characteristic of mandibular canines is the relatively straight line of the Mesial outline, compared to the distal outline

true

which tooth has a distinct Mesial and distal fossae with a pit that can have "snake eye" fillings

#28

true or false? on the permanent maxillary canine, the Mesial cusp ridge is longer than the distal cusp ridge

false

a Y-shaped occlusal groove pattern is characteristic of a

mandibula second premolar

if a mandibular second premolar has three cusps, what are they called

mesiolingual, distolingual and buccal

which premolar has a pronounced concavity on the Mesial side of the crown

maxillary first premolar

the cusp ridges form the buccal and lingual sides of the occlusal table, and the ____ make up the Mesial and distal boundaries of the occlusal table

marginal ridges

the only single rooted tooth to have three cusps is the______

mandibular second premolar

true or false? multiple supplementary grooves often are found on a maxillary second premolar

true

when compared to other premolars, which of the following characteristics is unique to a Mandibular First Premolar

there is likely to be a mesiolingual groove crossing onto the mesiolingual surface

which of the following characteristics is NOT true about a maxillary first premolar

the short lingual cusp is non functional is NOT true

which premolar has a deep Mesial root depression

maxillary first premolar (because it is bifurcated)

which premolar has a non functional lingual cusp

Mandibular First Premolar

which premolars are most likely to have three cusps and a lingual groove

mandibular second

due to the four cusps being almost equal in size, the "+" groove pattern on the occlusal surface of this molar identified the tooth as the

mandibular second permanent molar

from which view is only one root visible on a mandibular first molar

Mesial

if a permanent maxillary second molar has only three cusps, what are the three cusps called

mesiobuccal, distobuccal and lingual

name the two grooves found on the buccal surface of the mandibular first molars, mesibuccal and

distobuccal

of the following, which cusp is the smallest cusp on permanent maxillary molars

distolingual

the ____ cusp of the maxillary first molar is the largest cusp

mesiolingual cusp

the furcation of the mandibular molars may be seen from either a _____ or lingual

buccal

true or false? a prominent ridge crossing the occlusal surface of the permanent maxillary first molar is called the oblique ridge

true

during most of their eighth year, children have how many teeth in their mouth

24

during what age span are primary teeth in the process of erupting into the mouth

6 months to 2 years

how many non succadaneous are in the complete dentition

12

primary molars differ from permanent molars in that primary molars have

greater divergence of roots

the permanent mandibular central incisor erupts at age

6-7 years

how many roots does a primary maxillary first molar have

three

tooth #19 forms within the mandible at which location

distal to the tooth "K"

using the universal number or letter, which tooth erupts in place of primary tooth "E"

tooth #8

what permanent tooth erupts into the space previously held by any of the primary second molars

second premolars

chose the best description for anterior crossbite

the maxillary anterior teeth are lingual to the mandibular anterior teeth

when the mesiobuccal cusp of the maxillary first molar sits even with the buccal groove of the mandibular first it is

class 1 occlusion

when the mandibular posterior teeth sit more to the buccal than the maxillary posterior teeth, it is termed

posterior cross bite

true or false? in class II malocclusion, the profile retrognathic, means the lower jaw sits back further than in class 1 occlusion

true

loss of tooth structure due to mechanic forces is termed

abrasion

when examining a large group of people, what is the most frequent location where extra (supernumerary) permanent teeth may be found where

maxillary incisor area

which two teeth are most likely to be congenitally missing

#7 or #10

tooth wear caused by tooth to tooth contact is what

attrition

how many teeth should be visible in the mouth of a 3 year old

20

a cone shaped mass found on the occlusal surface of posterior teeth and that is made of ridges called a

cusp

a transverse ridge is made up of which two ridges

two triangular ridges

how many molars are there in one quadrant of a normal adult human dentition

3

which primary tooth is most unique in shape and resembles no other tooth

#S (primary mandibular first molars)

how many total premolars are there in the complete adult dentition

8

how many teeth are in a complete adult dentition

32

using the universal numbering system, what tooth is #13

maxillary left second premolar

using the universal numbering system, what tooth is the permanent mandibular left lateral incisor

#23

using the universal numbering system, what teeth are the maxillary central incisors

#8 and #9

using the universal numbering system for primary dentition, which teeth are the maxillary central incisors

E and F

using the universal numbering system, what teeth numbers are the 3rd molars

1, 16, 17, 32