Anatomy _Molars and Mixed Dent

7/29/2019 Anatomy _Molars and Mixed Dent

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1. eruption years of mandibular

first molars (#19 & 30)

6-7 years

2. from the distal view of the

mandibular first molars, the

crown is ??? (shorter or longer)

on the distal

SHORTER on the

distal sooo more of the

tooth's occlusal

surface is seen

3. From the mesial view of the

mandibular first molar, the

___________ cusp is longer and

more pointed than the

_____________ cusp.

the MESIOLINGUAL

cusp is longer and


MESIOBUCCAL cusp.

4. from the mesial view of the

mandibular first molar, the

crown is tilted ________?

Lingually

5. how many cusps are seen from

the buccal view of the mandibular

first molar?

3 cusps (D, DB, MB)

6. how many cusps can be seen from

the lingual view of the

mandibular first molars?

2 cusps (ML & DL)

both almost equal in

size

7. how many developmental grooves

can be seen from the buccal view

of the mandibular first molars

(#19 & 30)

2 developmental

buccal grooves (MB &

DB)

8. how many fossae are present on

the occlusal view of the

mandibular first molars?

3 Fossae (Large

central one, smaller

mesial triangular

fossa, smallest distal

triangular fossa/pit)

9. How many functional cusps can

be seen from the occlusal view of

the mandibular first molars?

5 Functional Cusps

(MB, ML, DL, DB, D)

10. how many roots do mandibular

first molars have?

2 ROOTS (MESIAL

AND DISTAL)

11. how many transverse ridges are

present on the occlusal view of

the mandibular first molars?

2 Transverse ridges

(even though the book

says there are

none......)

12. How many triangular ridges can

be seen from the occlusal view ofthe mandibular first molars?

4 triangluar ridges

13. List the 5 functional cusps from

the occlusal view of the

mandibular first molars from

highest to lowest

ML > DL > MB > DB >

D

14. List the 5 functional cusps seen

from the occlusal view of the

mandibular first molars from

largest to smallest

MB > ML > DL > DB >

D

15. T or F? From the mesial view of

the mandibular first molar, you

cannot see the distal root

TRUE - because the

mesial root is broader

and longer than the

distal root

16. T or F? The buccal cusps of the

mandibular first molars are

higher and more pointed than

the lingual

FALSE! The LINGUAL

cusps are higher and


BUCCAL cusps

17. T or F? The buccal surface of a

mandibular first molar is wider

than the lingual

TRUE

18. T or F? The distal root of

mandibular first molars is wider

and longer than the mesial root

FALSE! The mesial

root is wider and

longer than the distal

root.

19. T or F? the lingual surfaces of the

mandibular first molars is

smaller than the buccal

TRUE

20. T or F? Triangular ridges seen

from the occlusal view of the

mandibular first molars of the

lingual cusps are longer than the

triangular ridges of the buccal

cusps

TRUE

21. the CEJ seen from the mesial

view of the mandibular first

molar is _________?

Slightly curved

22. The distal root of the mandibular

first molars is ___________than the mesial root

distal root is

SMALLER than mesialroot so you can see the

wider mesial root

behind the distal root

from the distal view

23. the most common direction for

the root to bend in mandibular

first molars is to the

__________?

DISTAL

24. the occlusal view of the

mandibular first molars

resembles what shape?

PENTAGON (5

FUNCTIONAL CUSPS

ARE SEEN)

25. the root completion years of

mandibular first molars (#19 &

30)

9-10 years

26. The universal tooth numbers for

the two mandibular first molars

#19 & 30

27. these are normally the first

permenant teeth to erupt

mandibular first

molars (#19 & 30)

28. these are normally the largest

teeth in the mandibular arch

mandibular first

molars (#19 & 30)

Anatomy (Molars and mixed dentition)Study online at quizlet.com/_455bp

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29. these are the only mandibular molars with 5 cusps or developmental lobes (3 buccal

- MB, DB, D cusps and 2 lingual - ML, DL

mandibular first molars (#19 & 30)

30.what separates the 2 cusps (ML & DL) of the lingual surface of the mandibular first

molars?

the lingual developmental groove

31.what two roots do mandibular first molars have? Mesial Root (wider and longer)

Distal Root

32.where are the contact areas of the mandibular first molars (#19 & 30) Both M & D = at the junction of

occlusal and middle thirds

33.which fossa is the largest present on the occlusal surface of the mandibular first

molars?

Largest CENTRAL FOSSA

34.which is the smallest fossa present on the occlusal surface of the mandibular first

molars?

Smallest DISTAL triangular fossa

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Anatomy _Molars and Mixed Dent