occlusal examination

Question 1

condition in which there is DEFLECTION from normal relation of teeth to other teeth in same arch or opposing arch

Answer 1

malocclusion

Question 2

angles classification is based on the relation of

Answer 2

the MB cusp of maxillary 1st molar and buccal groove of mandibular 1st molar

Question 3

angle’s class 1

Answer 3

MB cusp of max fist molar bisects buccal groove of mand 1st molar

Question 4

same as normal occlusion but characterized by crowding, rotations, and other positional irregularities

Answer 4

class I malocculsion

Question 5

angles class II

Answer 5

MB cusp of max 1st molar is MESIAL to mand 1st molars bucca groove

Question 6

angle class II is also known as an

Answer 6

overbite

Question 7

angles class III

Answer 7

MB cusp of max 1st molar is DISTAL to buccal groove of mandibular 1st molar

Question 8

angles class III is also known as

Answer 8

underbite

Question 9

class III malocclusion

Answer 9

max 1st molar MB cusp is distal to buccal groove of mand 1st molar

Question 10

HORIZONTAL overlap of maxillary central incisors over the mand central incisors

Answer 10

overjet

Question 11

mm of overjet normally

Answer 11

2-3 mm

Question 12

VERTICAL overlap of max central incisors over the mand central incisors

Answer 12

overbite

Question 13

how much of max teeth cover up mand teeth

Answer 13

overbite
vertical overlap

Question 14

normal overbite

Answer 14

2-3
2-30% of height of mand incisors

Question 15

horizontal growth of mand EXCEEDS horizontal development of maxillar, and lower anterior teeth end up in front of upper anterior teeth

can also result from underdevelopment of maxilla

Answer 15

anterior crossbite

Question 16

part of the normal cycle of dentition but excessive wear and tooth loss leads to variety of changes within the oral cavity

Answer 16

dental wear

Question 17

etiology of this is multifactoral with complex relationships between

Answer 17

dental wear:
attrition, abfraction, abrasion, erosion

Question 18

this is classified to the specific mechanism that is respond for the wear:

Answer 18

erosive tooth wear (ETW)
erosion (only one that is chemical)
abfraction
abrasion
attrition

Question 19

bony ridges-exostosis, tori
gingival recession
abfractions
broken teeth and restorations
excessive attrition

Answer 19

evidence of bruxism

Question 20

loss of cervical area due to bruxism

Answer 20

abfractions

Question 21

bony ridges

Answer 21

exostosis, tori

Question 22

wear facets
broken restorations
chipped teeth

Answer 22

evidence of occlusal wear/trauma

Question 23

mechanical wear of the incisal or occlusal surface as a result of functional or para-functional movements of mand (tooth-to-tooth contact)

Answer 23

attrition

bruxism accelerates
can be age related
occlusal surfaces match jaw movements and usually have similar degree of wear

Question 24

form of wear along gingival margin that is NOT caused by acid activity

Answer 24

abfraction

Question 25

cervical wedge-shaped defects

Answer 25

abfraction

Question 26

this can results in abfractions because cervical area of the tooth flexes under load

Answer 26

bruxism (clenchers- cause teeth to slightly flex)
PDL is the shock absorber

Question 27

cervical wedge-shaped defects

Answer 27

abrfaction

Question 28

bruxism results in cervical loss- cervical area of the tooth flexes under the load
physical

Answer 28

abraction

Question 29

abnormal tooth surface loos resulting from DIRECT FRICTIONAL FORCES between teeth and external objects or frictional forces between contacting teeth in presence of abrasive movement

Answer 29

abrasion

Question 30

abrasion may occur from:

Answer 30

improper brushing (common V shap notch in gingival 1/3 of tooth
habits (biting nails)
vigorous use of toothpicks between adjacent teeth

Question 31

abrasion can happen where

Answer 31

interproximal (tooth picks)
incisal notching (nails, pipe)
cervical (toothbrushing)

Question 32

wear or loss of tooth structure by ____ action

Answer 32

erosion
chemicomechanical action

Question 33

facial erosion:

Answer 33

lemons, acidic liquids

Question 34

lingual erosion:

Answer 34

bulimia

Question 35

thinning, chipping of incisal edges
anterior open bite
loss of vertical dimension

Answer 35

bulimia

Question 36

bulimia oral signs

Answer 36

raises amalgams
thermal sensitivity