Oral Anatomy Molars 낱말 카드

51%

What proportion of their quadrant do mandibular molar widths account for?

44%

What proportion of their quadrant do maxillary molar widths account for?

Third molars

What are the only teeth without a proximal contact on their distal surface?

Mastication, vertical dimensions of face, proper alignment, support cheeks

What are the functions of molars?

Mesiodistal

Do molars have greater mesiodistal or occlusocervical dimension?

3-5

How many cusps can molars have?

Maxillary first molars

Molar crowns taper narrower from buccal to lingual, except for which one?

Distolingual cusp

Maxillary first molars do not taper buccolingually because of a large...

Mesiodistally

From the occlusal and facial view, what direction do molars taper?

Cervical third

Similar to all teeth, where is the facial height of contour located on all molars?

Middle third

Similar to all posterior teeth, where is the lingual height of contour located on all molars?

Junction of middle and occlusal third

Where is the mesial contact located on all molars occlusocervically?

Middle third

Where is the distal contact located on all molars occlusocervically?

Maxillary

Are maxillary or mandibular molars wider faciolingually than mesiodistally?

Mandibular

Are maxillary or mandibular molars wider mesiodistally than faciolingually?

Mandibular first molar

What is the widest tooth in the mouth mesiodistally?

Cusps

The number of lobes on a molar corresponds to the number of _______.

Carabelli cusp

What is the name of the possible extra fifth cusp located on the mesiolingual surface of maxillary first molars?

Lingually

Where do mandibular molar crowns tilt relative to the midroot axis?

Centered

Where do maxillary molars tilt relative to the midroot axis?

Mandibular

Do maxillary or mandibular molars display a distal crown tilt from the buccal view?

3

How many roots do maxillary molars have?

2

How many roots do mandibular molars have?

(longest) Lingual, mesiobuccal, distobuccal (shortest)

What are the maxillary molar roots from longest to shortest?

Mesiobuccal

In maxillary molars, is the mesiobuccal or distobuccal root wider?

Mesial

Is the mesial or distal root of a mandibular molar longer and wider?

First

Are first or second molars larger?

5

How many cusps do mandibular first molars typically have?

Mesiobuccal, distobuccal, distal

What are the 3 buccal cusps of a mandibular first molar?

Mesiolingual and distolingual

What are the 2 lingual cusps of a mandibular first molar?

Mesiobuccal

Which buccal groove of a mandibular first molar determines the occlusion class?

Class I

What class of caries occurs at the end of buccal grooves on mandibular molars?

4

How many cusps do mandibular second molars typically have?

2

How many buccal grooves do mandibular first molars have?

1

How many buccal grooves do mandibular second molars have?

Mesiolingual

What cusp is the largest on a mandibular second molar?

Distobuccal

What cusp is the smallest on the mandibular second molar?

Working

Are working cusps or non-working cusps more prone to decay?

Buccal

Are buccal or lingual cusps of mandibular molars considered functional cusps?

Lingual

Are buccal or lingual cusps of maxillary molars considered functional cusps?

Mesial

Are contact points of all molars located more occlusally on the mesial or distal surface?

No PDL attachment

What is the consequence of having enamel formation at the furcation point in molars?

First

Is the root trunk shorter on first or second mandibular molars?

First (shorter root trunk)

Is the root furcation located closer to the CEJ on the first or second mandibular molars?

Second

Do first or second mandibular molars have a root morphology of "a pair of pliers"?

Mesiolingual

What is the tallest cusp on a mandibular first molar?

Distal

What is the shortest cusp on a mandibular first molar?

Mandibular first molar

What tooth has the largest root-crown ratio in the entire mouth?

Mandibular first molar

What tooth has the largest root-crown ratio in the mandibular arch?

Maxillary second premolar

What tooth has the largest root-crown ratio in the maxillary arch?

Lingual (due to buccolingual taper)

Are proximal surfaces of mandibular molars more visible from the buccal or lingual view?

Maxillary

Is the lingual groove and pits of mandibular or maxillary molars a common place for tooth decay?

Mesiolingual

Is the mesiolingual or distolingual cusp of mandibular molars longer?

Along CEJ on mesiobuccal cusp (height of contour)

Where is the buccal cervical ridge located on mandibular molars?

Lingual

Is the CEJ located more occlusally on the buccal or lingual surface of mandibular molars?

Concave

Is the marginal ridge of mandibular molars convex or concave?

Distal

Can see both roots of a mandibular first molar from the mesial or distal view?

Mesial (larger of the two)

Does the mesial or distal root of a mandibular first molar have 2 canals?

Mesial

Does the mesial or distal root of a mandibular first molar have mesial and distal depressions?

Pentagon

What shape describes the occlusal outline of mandibular first molars?

1. Mesiolingual and distolingual

2. Mesiobuccal

3. Distobuccal

4. Distal

What are the 5 cusps of a mandibular first molar from highest to lowest (height)?

1. Mesiolingual

2. Mesiobuccal

3. Distolingual

4. Distobuccal

5. Distal

What are the 5 cusps of a mandibular first molar from largest to smallest (cusp size/bulk)?

5 (same as # of cusps)

How many triangular ridges are present on a mandibular first molar?

4 (same as # of cusps)

How many triangular ridges are present on a mandibular second molar?

2

How many transverse ridges are present on mandibular first molars?

2

How many transverse ridges are present on mandibular second molars?

Distal

What cusp on a mandibular first molar does not form a transverse ridge?

1. Central

2. Mesial triangular

3. Distal triangular

What are the fossae of mandibular molars from largest to smallest?

Mesiobuccal and lingual

What grooves feed into the central fossa of a mandibular first molar?

Distobuccal

Which groove on a mandibular first molar does not feed into any fossa?

Buccal and lingual (groove pattern forms + sign)

What grooves feed into the central fossa of a mandibular second molar?

Lingual (due to more buccally located contacts)

Do mandibular molars have larger buccal or lingual embrasures?

Tuberculum intermedium

What term describes an extra lingual cusp on a mandibular molar?

Tuberculum sextum

What term describes an extra cusp on the distal marginal ridge of a mandibular first molar?

First

(shorter root trunk/higher furcation)

During bone loss, would the furcation on the mandibular first or second molar become exposed first?

Maxillary first molar

What is the largest tooth in the maxillary arch?

First

Is the maxillary first or second molar wider mesiodistally?

3 (out of 4 cusps)

How many cusps can you see from the buccal view of a maxillary molar?

Distolingual

Which cusp cannot be seen from the buccal view of maxillary molars?

5 (all cusps)

How many cusps can you see from the buccal view of a mandibular first molar?

Lingual

Which groove on a maxillary molar is prone to caries?

Junction of occlusal and middle third

Where is the mesial contact of all maxillary molars located?

Middle third

Where is the distal contact of all maxillary molars located?

Roots of maxillary second premolar and molars

What makes up the floor of the maxillary sinus?

First

Does the maxillary first or second molar have more equally sized mesiobuccal and distobuccal cusps?

Second

(Due to mesiobuccal cusp being larger than distobuccal cusp)

Does the maxillary first or second molar have a more distally located buccal groove?

Distolingual

What cusp is missing when a maxillary molar only has 3 cusps?

Mesiolingual

What is the largest cusp on maxillary molars?

5

(count extra lobe since carabelli cusp is large)

How many lobes do maxillary first molars develop from if they have a large carabelli cusp?

4

(since cusp is small you don't count another lobe)

How many lobes do maxillary first molars develop from if they have a small carabelli cusp?

Lingual

Does the lingual root of maxillary first molars commonly have a longitudinal depression on the buccal or lingual surface?

First

Are the roots of maxillary first or second molars more divergent?

2 (+ Carabelli)

(Mesial cusps are taller than distal cusps)

How many cusps are visible from the mesial view of maxillary molars?

4 (all cusps)

(Mesial cusps are taller than distal cusps)

How many cusps are visible from the distal view of maxillary molars?

Maxillary first molar

What is the widest tooth in the mouth faciolingually?

Moves higher into occlusal third

How does the lingual height of contour change if a maxillary first molar has a large carabelli cusp?

Distal

(due to crown tapering)

Can you see some of the facial/lingual surfaces of a maxillary molar from the mesial or distal view?

Distal

(mesiolingual root is wide and blocks distolingual root from mesial view)

Are you able to see all 3 roots of a maxillary molar from the mesial or distal view?

Mesial marginal ridge

(can see more of occlusal surface from distal view)

Is the mesial or distal marginal ridge of maxillary molars located more occlusally?

First

Are tubercles and marginal ridge grooves more common on maxillary first or second molars?