Mandibular Molars Flashcards by Annabella Moody

The Mandibular molars are considered the:

Largest mandibular teeth

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In the first mandibular molar there are generally _____ cusps, while in the second mandibular molar there are generally _____ cups

5, 4

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Mandibular molars are broader ____ than ____

MD, BL

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The mandibular molars are broader _____ while the maxillary molars are broader ____

MD, FL

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Mandibular first molar:

How many cusps are there? Name the cusps:

Five cusps- 3 buccal, 2 lingual

Mesiobuccal, distobuccal & distal (buccal cusps)
Mesiolingual & distolingual (lingual cusps)

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Mandibular first molar:

How many roots, name the roots

Two roots
Mesial root, distal root

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The two roots of the Mandibular first molar are broad:

B-L

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The mesial root of the Mandibular first molar curves _____ while the distal root is pointed in a ____ direction

Distally; distal direction

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Mandibular 1st molar: Buccal aspect-

Geometric outline:

Trapezoidal

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Mandibular 1st molar: Buccal aspect

How many cusps are visible from this view?

All five cusps

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Mandibular 1st molar: Buccal aspect

List the order of sizes biggest to smallest of the buccal cusps

MB>DB>distal cusp

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Mandibular 1st molar: Buccal aspect

How grooves can be seen from this aspect? Name them-

Two
Mesiobuccal developmental groove
Distobuccal developmental grocoe

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Mandibular 1st molar: Buccal aspect

The mesiobuccal developmental groove is ____ compared to the distobuccal developmental groove

Shorter

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Mandibular 1st molar: Buccal aspect

The MB developmental groove terminates in the:

The DB developmental groove terminates in the:

Middle third of tooth

Cervical third of tooth

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Mandibular 1st molar: Buccal aspect

The cervical line curves:

Apically

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Mandibular 1st molar: Buccal aspect

The mesial height of contour is in the:

Middle third

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Mandibular 1st molar: Buccal aspect

Describe the mesial outline:

Convex & concave

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Mandibular 1st molar: Buccal aspect

Describe the distal height of contour:

In the middle 1/3 on the distal aspect of the distal cusp

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Mandibular 1st molar: Buccal aspect

Describe the distal outline:

Convex & straight

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What view of the Mandibular 1st molar is this?

Label the grooves:

Buccal view (we can see all five cusps)

A- DB developmental groove
B- MB developmental groove

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Mandibular 1st molar: Buccal Aspect- roots

Name the two roots visible:

Mesial & distal

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Mandibular 1st molar: Buccal Aspect- roots

The mesial root is _____ & curves _____ to a ______

Straight; distally; tapered apex

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Mandibular 1st molar: Buccal Aspect- roots

The distal root points _____ to a _____

Distally; more tapered apex

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Mandibular 1st molar: Buccal Aspect- roots

The roots are ______ on the buccal than on the lingual

Wider MD

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Mandibular 1st molar: Buccal Aspect- roots Are there developmental depressions on the roots? If so where-

Developmental depression on the mesial & distal aspects of each root

Mandibular 1st molar: Buccal Aspect- roots There is a developmental depression buccally on the:

Root trunk from CEJ to furcation

Mandibular 1st molar: Lingual aspect From this aspect, how many cusps are visible? Name them-

Three cusps visible- ML, DL, Distal

Mandibular 1st molar: Lingual aspect Describe the sizes of the mesiolingual & distolingual cusp in relation to one another:

ML is larger- wider & taller

Mandibular 1st molar: Lingual aspect What anatomical feature can we see from this aspect?

Lingual developmental groove

Mandibular 1st molar: Lingual aspect Mesial & distal aspects of the crown are visible from the lingual aspect due to the:

Lingual convergence

Mandibular 1st molar: Lingual aspect How many roots can we see from this aspect?

Two

Mandibular 1st molar: Lingual aspect The roots measure longer on the _____ than the ____

Lingual; buccal

Mandibular 1st molar: Lingual aspect The bifurcation is in line with:

Lingual developmental groove

Mandibular 1st molar: Mesial aspect: What is the geometric outline-

Rhomboidal

Mandibular 1st molar: Lingual aspect What cusps are visible from this aspect?

MB & ML

Mandibular 1st molar: Lingual aspect How many roots are visible from this aspect?

One root- mesial root

Mandibular 1st molar: Lingual aspect Describe the buccal height of contour:

In cervical 1/3 (buccal cervical ridge)

Mandibular 1st molar: Lingual aspect What is another name for the buccal height of contour (specific to this tooth)

Buccal cervical ridge

What is the name of the anatomical feature represented by the blue dot on the mandibular 1st molar:

Buccal cervical ridge

Mandibular 1st molar: Mesial aspect An interesting fact about this tooth is that:

The crown has a lingual tilt to the root axis

When a crown has a lingual tilt to the root axis, this is characteristic of-

Mandibular molars & mandibular premolars

Mandibular 1st molar: Mesial aspect The lingual height of contour is:

In middle 1/3

Mandibular 1st molar: Mesial aspect The cervical line curves:

Occlusally

Mandibular 1st molar: Mesial aspect The cervical line is higher _____ than ______

Lingually than buccally

Mandibular 1st molar: Mesial aspect The root apex lies:

Under MB cusp

Mandibular 1st molar: Mesial aspect What can be seen on the root?

Slight mesial developmental depression

Mandibular 1st molar: Distal aspect Describe the visibility from this aspect compared to the mesial aspect:

More tooth visible

Mandibular 1st molar: Distal aspect What cusp is visible from this aspect?

DB cusp

Mandibular 1st molar: Distal aspect How many roots are visible from this aspect?

Two

Mandibular 1st molar: Distal aspect The distal marginal ridge is ____ & dips _____

Shorter; dips cervically

Mandibular 1st molar: Distal aspect What groove is visible from this aspect?

DB developmental groove

Mandibular 1st molar: Distal aspect From this aspect, the DB developmental groove is visible and ends on ____ at the _____

The distal surface at the distobuccal line angle

What groove is seen & what aspect is this?

Distal aspect- distobuccal developmental groove

Mandibular 1st molar: Occlusal aspect Geometric shape:

Hexagonal

Mandibular 1st molar: Occlusal aspect From this aspect, the width of the crown is greater ____ than _____

MD than BL

Mandibular 1st molar: Occlusal aspect (In terms of MD) The crown is wider _____ & tapers _____

Mesially; distally

Mandibular 1st molar: Occlusal aspect (In terms of BL) The crown is wider _____ & tapers ____

Buccally; lingually

Label each side from this occlusal view of the Mandibular 1st molar:

A- mesial B- buccal C- distal D- lingual

Mandibular 1st molar: Occlusal aspect Rank the cusp based size from largest to smallest:

MB > ML >= DL > DB > D

Mandibular 1st molar: Occlusal aspect Aside from the occlusal surface, what other surface is mostly visible from this aspect?

Buccal surface

Mandibular 1st molar: Occlusal aspect How many major fossa- specify the name(s)

1 major fossa- central fossa

Mandibular 1st molar: Occlusal aspect Describe the central fossa

Major fossa, circular & centrally placed between cusp ridges

Mandibular 1st molar: Occlusal aspect How many minor fossa are present - specific the name(s)

2 minor fossa- mesial triangular fossa, distal triangular fossa

Mandibular 1st molar: Occlusal aspect List the developmental grooves visible from this aspect:

Central developmental groove Mesiobuccal developmental groove Distobuccal developmental groove Lingual developmental groove

Label the following of the Mandibular 1st molar:

Purple- mesiobuccal developmental groove Green- distobuccal developmental groove Pink- central developmental groove Blue- lingual developmental groove

Mandibular 1st molar: Occlusal aspect What are the boundaries of the central fossa? (6)

1- distal slope of MB cusp 2- Mesial & distal slopes of DB cusp 3- Mesial slope of distal cusp 4- Distal slope of ML cusp 5- Mesial slope of DL cusp 6- Triangular ridges of the MB, D, DL, ML cusps

Groove on the mandibular 1st molar: Buccal- Lingual- Mesial- Distal-

Buccal- DB & MB developmental grooves Lingual- lingual developmental groove Mesial- none Distal- DB developmental groove

Mandibular 2nd molar: Compared to the mandibular first, the size of the Mandibular 2nd molar:

Smaller

Mandibular 2nd molar: How many cusps are present, name them:

4 cusps MB cusp ML cusp DB cusp DL cusp (No fifth distal cusp)

What is the fifth additional cusp present on the mandibular first molar, but not the second?

Distal cusp

Mandibular 2nd molar: Number of roots- name them:

Mesial & distal roots

Mandibular 2nd molar: buccal aspect: Compared to the mandibular 1st molar, this tooth appears:

Shorter & narrower

Mandibular 2nd molar: Buccal aspect How many cusps are visible-

All four- MB, DB, ML, DL

Mandibular 2nd molar: Buccal aspect What separates the two buccal cusps

Buccal developmental groove

Mandibular 2nd molar: Buccal aspect The buccal developmental groove separates what two cusps?

MB & DB

Mandibular 2nd molar: Buccal aspect The mesial & distal contact are in the:

Middle 1/3

Mandibular 2nd molar: Buccal aspect The cervical line points towards:

Bifurcation

Mandibular 2nd molar: Buccal aspect Compared to the mandibular 1st molar, the roots are:

Shorter, closer & more parallel

Mandibular 2nd molar: Buccal aspect Compared to the mandibular 1st molar, the roots are more:

Inclined distally

Mandibular 2nd molar: Lingual aspect The crown converges toward the ____

Lingual

Describe the lingual convergence between the mandibular 1st & 2nd molars:

The crown converges lingually more in the 1st molar

Mandibular 2nd molar: Mesial aspect Compared to the mandibular first molar: the buccal curvature & buccal cervical ridge is:

Less pronounced

Mandibular 2nd molar: Mesial aspect Compared to the mandibular first molar: The cervical line is:

Less curved

Mandibular 2nd molar: Mesial aspect Compared to the mandibular first molar: The mesial root is:

More pointed at root apex

Mandibular 2nd molar: Distal aspect: What is absent in this tooth compared to the mandibular 1st molar:

Distal cusp

Mandibular 2nd molar: Distal aspect Describe the distal contact:

Contact is centered BL & the contact is i8n the middle 1/3 occlusalcervcially

Mandibular 2nd molar: occlusal aspect What is the geometric outline?

Rectangular in shape

Mandibular 2nd molar: occlusal aspect Compared to the mandibular 1st premolar- what cusp is more prominent?

DB Cusp

Mandibular 2nd molar: occlusal aspect Compare the four cusps from this view:

All relatively similar in size

Mandibular 2nd molar: occlusal aspect What grooves are present?

Central groove, buccal grooves, lingual grooves (no distobuccal groove)

Mandibular 2nd molar: occlusal aspect What shape do the occlusal grooves form?

Cross

Mandibular 2nd molar: occlusal aspect The overall appearance of the occlusal surface is _____ due to _____

More wrinkly due to more supplemental grooves

The mandibular 1st molar develops from ____ lobes while the mandibular 2nd molar develops from ____ lobes

5; 4

Mandibular 3rd molars: Both the maxillary & Mandibular 3rd molars are considered:

The most variable teeth in the mouth

The mandibular 3rd molars are usually similar to:

The other mandibular molars

List the anomalies often seen in the mandibular 3rd molars:

Oversized crowns

List the anomalies commonly seen the maxillary 3rd molars:

Undersized crowns

Which molars are commonly impacted:

Mandibular 3rd

Mandibular 3rd molars: From a buccal view- how many cusps can be seen?

2 cusps, 2 roots

Mandibular 3rd molars- From a lingual aspect they are:

Similar to 1st & 2nd mandibular molars

Mandibular 3rd molars- From a mesial aspect, the root is:

Shorter & more tapered

Mandibular 3rd molars- From a distal view, they look:

Similar to mesial but narrower

Mandibular 3rd molars From an occlusal view compared to the other mandibular molars they look:

More rounded