cavity nomenclature

Question 1

line angle

Answer 1

2 sides meeting to form an edge , e.g edge of isthmus in mod

Question 2

point angle

Answer 2

3 sides (or more) meeting to form a point or corner

Question 3

cavo surface margin angle

Answer 3

angle between prepared wall and tooth surface

Question 4

how can you tell left and right mandibular lateral incisors apart

Answer 4

mesio-incisal angle is sharp and disto-incisal angle is more rounded
mandibular lateral incisors are more fanned than centrals

Question 5

how can you tell left and right mandibular central incisors apart

Answer 5

mesio incisal angle is marginally sharper than the distal incisal angle
cervical undulation also greater on mesial

Question 6

mammelons

Answer 6

bumps commonly seen on incisal edge of newly errupted incisorrs
often dissapear as tooth wear occurs

Question 7

how can you tell left and right maxillary canines apart

Answer 7

Mesial border is shorter and less steeply inclined than the Distal border
mesial contact point located more incisally than distal

Question 8

how can you tell left and right mandibular canines apart

Answer 8

Mesial border of the cusp is shorter and less steeply inclined than the distal border

Question 9

describe an upper first molar and how would you tell right and left apart

Answer 9

diamond shape occlusal surface , 3 roots (2b, 1p)
h shape fissure pattern, may be tubercle of carrabelli on mesio palatal cusp

to tell apart - mesio palatal cusp is largest and may have tubercle of carabelli , disto palatal cusp is separated by deep fissure

Question 10

describe an upper second molar and how would you tell right and left apart

Answer 10

disto palatal cusp greatly reduced maybe even absent so triangular shaped occlusal surface
smaller than 1st
reduced disto palatal cusp can help tell apart if no disto palatal cusp palatal cups is mesially displaced

Question 11

describe an lower first molar and how would you tell right and left apart

Answer 11

only tooth with 5 cusps

tell apart by the small disto buccal cusp

Question 12

describe a lower second molar and how would you tell right and left apart

Answer 12

square shaped occlusal surface cross shaped fissure

mesio buccal cusp largest

Question 13

what is a key feature of upper first pre molars

Answer 13

canine fossa
concavity on the mesial root surface
also marked mesial displacement of lingual cusp

Question 14

how can you tell upper second premolars apart

Answer 14

distal marginal ridge more cervical than mesial

Question 15

how can you tell lower second pre molars apart

Answer 15

lingual cusp is either mesially displaced, or if two lingual cusps mesial is largest

Question 16

how can you tell lower first pre molars apart

Answer 16

small groove running from mesial pit to mesio lingual surface
mesial contact point also smaller than distal