Unit 5-Permanent Pre molars

Question 1

succedaneous teeth

Answer 1

different name than the teeth they replace

Question 2

number facial cusps

Answer 2

1

Question 3

lingual cusps

Answer 3

0-2

Question 4

maxillary 1st size vs max 2nd

Answer 4

max 1st> (BUT mand 2nd > Mand 1st)

Question 5

wider in which direction

Answer 5

buccolingually (than m-d)

Question 6

mandibular crown dimensions (shape)

Answer 6

square

Question 7

compare cusps of Max vs cusps mandibulars

Answer 7

cusps of max are equal in size-teeth more symmetrical- whereas on mand lingual are smaller

Question 8

max proximal view of root inclination

Answer 8

none-root centered

Question 9

mandibular proximal view of root inclination

Answer 9

to lingual

Question 10

smaller crown on max 1st and second

Answer 10

2nd, also more rounded

Question 11

1st max premolar replaces

Answer 11

decidious max 1st molar

Question 12

max 2nd premolar replaces

Answer 12

decidious maxillary second molar

Question 13

shape of both these teeth from buccal

Answer 13

pentagonal

Question 14

height compared to rest of teeth (occlusocervical)

Answer 14

tallest post, shorter than anteriors though

Question 15

mesio occlusal angle from buccal view of max 1st and max 2nd

Answer 15

obtuse angle

Question 16

mesial margin of max 1st premolar from contact to cej (and max 2nd)

Answer 16

(shallowly) concave- max 2nd less concave

Question 17

Mesial crest of curvature/contact of max 1st and max 2nd from buccal

Answer 17

middle 1/3 and occlusal junction

Question 18

distal crest of curvature on max 1st and 2nd compared to mesial

Answer 18

slightly more cervical

Question 19

Mesio-occlusal slope of Max 1st (and max 2nd)

Answer 19

longer and straighter (on 2nd it is opposite!!!!!-shorter/sloped)

Question 20

disto-occlusal slope of max 1st (and max 2nd)

Answer 20

shorter and more curved on 1st (longer and straight on 2nds)

Question 21

cusp straight on max 1st from buccal?

Answer 21

no, offset to distal on max 1st

Question 22

CEJ curvature

Answer 22

towards apex (curves up towards tip of root)

Question 23

the surface of buccal

Answer 23

buccal ridge from buccal cusp to CEJ and mesiobuccal and distobuccal development- with imbrication lines

Question 24

buccal height of contour location

Answer 24

in the cervical third

Question 25

cusp straight on max 2nd from buccal?

Answer 25

no, offset mesial on max 2nd

Question 26

lingual surfaces of both

Answer 26

smooth, convex; NO defined lingual ridge

Question 27

lingual ridge?

Answer 27

NO

Question 28

buccal ridge?

Answer 28

YES!-- large with developmental depressions and imbrication lines

Question 29

lingual cusp of both teeth (and compare to buccal cusp)

Answer 29

offset mesially-less on max 2nd; | both are shorter and less pointed than buccal cusp

Question 30

lingual cusp heights-and compare between 1st and second max

Answer 30

lingual cusp is shorter than buccal on both-BUT the max 2nd is considerably longer --> less occlusal is visible

Question 31

mesio-occlusal slope vs d-o on lingual surface

Answer 31

m-o < d-o

Question 32

developmental depressions on lingual? Grooves? Pits?

Answer 32

NO-smooth and convex

Question 33

lingual height of contour

Answer 33

middle third

Question 34

buccal and lingual heights of contour

Answer 34

buccal is middle 1/3-occlusal junction and lingual is middle third

Question 35

shape from mesial view

Answer 35

trapezoidal-longer base is at cervical

Question 36

buccal margin (from mesial)

Answer 36

convex

Question 37

lingual margin (from mesial)

Answer 37

even arc

Question 38

buccal height of contour

Answer 38

cervical third

Question 39

lingual height of contour

Answer 39

middle third

Question 40

buccal and lingual heights of contour

Answer 40

buccal is cervical and lingual is middle third

Question 41

marginal ridge/height of contour of lingual and contacts

Answer 41

1st max: middle third | 2nd max: both more cervical

Question 42

occlusal margin? (what does the line between the buccal and lingual cusp look like?)

Answer 42

irregular concave

Question 43

mesial surface of both teeth

Answer 43

mesial marginal ridge, mesial marginal groove, and mesial concavity on max 1st Max 2nd lacks mesial concavity and groove

Question 44

CEJ from mesial

Answer 44

irregular convex towards occlusal

Question 45

location of mesial concavity

Answer 45

max 1st only; found in middle of cervical 3rd

Question 46

mesial height of contour/contact area, in middle?

Answer 46

at junction of middle and occlusal thirds-offest to buccal (NOTE; mand is slightly more cervical)

Question 47

shape of mesial contact

Answer 47

circle

Question 48

distal is wider in which direction

Answer 48

mesio-distally than occlusal-cervically

Question 49

Buccal margin from distal and crest of curvature

Answer 49

convex- in gingival 1/3

Question 50

lingual margin from distal and crest of curvature

Answer 50

symmetrical and convex; in middle 1/3

Question 51

location of occlusal marginal ridge from distal

Answer 51

more cervical, so more of occlusal surface is visible

Question 52

more occlusal surface visible from?

Answer 52

distal, occlusal marginal ridge is more cervical

Question 53

marginal groove on distal of max 1st?

Answer 53

NO

Question 54

CEJ of distal

Answer 54

still occlusally, less than mesial

Question 55

Contact area of distal

Answer 55

larger, still at middle and occlusal 1/3 junction but more cervical-ovoid (larger in max 2nd and more cervical)

Question 56

shape of distal contact

Answer 56

ovoid

Question 57

shape of outlines of distal

Answer 57

Convex in all directions

Question 58

concavity present in distal?

Answer 58

no, may be flattened

Question 59

Shape of occlusal and width

Answer 59

hexagonal (wider b-l)