Maxillary Molars Flashcards by Annabella Moody

How many roots are present on the maxillary molars?

Three roots

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What are the roots present on the maxillary molars?

Two buccal, one lingual

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In maxillary molars what root is the largest?

The one lingual

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Label the views of these maxillary molars:

Buccal; lingual

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The maxillary second molar has ____ cusps, while the maxillary first molar has ____ cusps

Four, five

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What cusp is the largest in maxillary molars

Mesiolingual

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What are the four cusps of the maxillary second molar:

Distobuccal
Distolingual
Mesiobuccal
Mesiolingual

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In maxillary molars what cusps form a trigon or primary cusp triangle:

Mesiolingual
Mesiobuccal
Distobuccal

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In maxillary molars the ML, MB & DB cusps form a:

Trigon/ primary cusp triangle

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In maxillary molars the ____ cusp is the smallest & ______ in size from 1st to 3rd molar

Distolingual
Decreases

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In maxillary molars, the crowns are broader ____ than ____

Buccolingually than mesiodistally

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In maxillary molars, the crowns are relatively short:

Occlusion-cervically

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In maxillary molars the DB cusp is connected to the ML cusp by an:

Oblique ridge

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In maxillary molars what forms the oblique ridge

The DB cusp connected to the ML cusp

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The distal cusp ridge of the mesiolingual cusp, & the triangular ridge of the distobuccal cusp make up the ________ on what tooth?

Oblique ridge
Maxillary 1st molar

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What makes up the oblique ridge of the maxillary first molar?

The distal cusp ridge of the mesiolingual cusp & the triangular ridge of the distobuccal cusp

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Label the following views of the maxillary first molar:

Top left- buccal
Top right- lingual
Middle- occlusal
Bottom left- mesial
Bottom right- distal

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Maxillary 1st molar: Buccal

The crown outline is:

Roughly trapezoidal

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Maxillary 1st molar: Buccal

What is visible from this view

Parts of the four major cusps

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Maxillary 1st molar: Buccal

The distal profile is:
The mesial profile is:

Convex
Convex & flat

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What view is this from? Where is mesial & where is distal:

Buccal view

Left- distal
Right- mesial

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Maxillary 1st molar: Buccal

Compare the MB & DB cusps:

MB cusp is larger & DB cusp is more pointed

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Maxillary 1st molar: Buccal

MB & DB cusps are separated by:

Buccal developmental groove

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Maxillary 1st molar: Buccal

The buccal developmental groove separates:

MB & DB cusps

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Maxillary 1st molar: Buccal Where are the mesial & distal contacts located?

Both in middle 1/3

Maxillary 1st molar: Buccal Which contact is slightly more cervical?

Distal contact

Maxillary 1st molar What does the blue line represent? What view is this from?

Buccal developmental groove Buccal aspect

Maxillary 1st molar: Buccal An interesting fact regarding the maxillary 1st molar is that there is often a concavity present at the:

Cervical area on the distal surface of the cusp

Maxillary 1st molar: Buccal What is often present at the cervical area on the distal surface of the DB cusp

Concavity

What is significant about the often present concavity at the cervical area on the distal surface of the DB cusp (2)

1- can complicate restorations 2- difficult to remove calculus

Maxillary 1st molar: Buccal How many roots are visible from this view?

Three

Maxillary 1st molar: Buccal Root that is straight, curves distally & apex is in line with the MB tip

Mesiobuccal root

Maxillary 1st molar: Buccal The smallest, distal inclination, then mesial root

Distobuccal root

Maxillary 1st molar: Buccal The longest; in line with the buccal groove (root)

Lingual/palatal

Maxillary 1st molar: Buccal The root trunk takes up ____ the length of the root

1/3

Maxillary 1st molar: Buccal The point of point of bifurcation is:

4mm apical CEJ

Maxillary 1st molar: Buccal The roots of this tooth are: (relative to crown)

2x as long as the crown

Maxillary 1st Molar: roots The lingual, MB, & DB roots are splayed:

Wider than the crown width

Maxillary 1st Molar: roots List the roots longest to shortest

L>MB>DB

Maxillary 1st Molar: roots How many canals are present in each of the roots:

MB: two canals (90-95% of cases) DB: 1 canal Lingual: 1 canal

Label the following transverse sections of the maxillary 1st molar roots:

Left: DB Middle: Lingual Right: MB

Maxillary 1st Molar: Lingual From this view what cusps are visible?

ML & DL cusps

Maxillary 1st Molar: Lingual The Mesiolingual & distolingual cusps are separated by a:

Lingual groove

Maxillary 1st Molar: Lingual The ML & DL cusps are separated by a lingual groove that ends in the:

Middle of the lingual surface

Maxillary 1st Molar: Lingual What is this blue line depicting:

Lingual groove

Maxillary 1st Molar: Lingual The ML cusp = ____ width of tooth

3/5 mesiodistal

Maxillary 1st Molar: Lingual The ML cusp is _______ & _____ compared to the DL cusp

Broader & longest

Maxillary 1st Molar: Lingual The ML cusp contains:

Cusp of Carabelli (5th cusp)

Maxillary 1st Molar: Lingual The DL cusp is:

Spheroidal

The fifth cusp located on the ML cusp of the maxillary first molar

Cusp of carabelli

What view allows you to see the cusp of carabelli?

Lingual view of the maxillary molar

The green line is showing ____ while the blue line is showing _____

Green- cusp of Carabelli Blue- lingual groove

Maxillary 1st Molar: Lingual How many roots are visible? Which root is the longest?

Three roots visible; longest= lingual

Maxillary 1st Molar: Lingual What root is in line with the lingual groove?

Lingual root

Maxillary 1st Molar: Lingual What is present on the lingual aspect from the terminus of the lingual groove extending to the middle 1/3 of the root

Shallow depression

Maxillary 1st Molar: Mesial What is the geometrical outline

Trapezoidal

Maxillary 1st Molar: Mesial From this view, the tooth converges:

Occlusally

Maxillary 1st Molar: Mesial From this view, the tooth converges occlusally with the maximum BL width at the:

Cervix

Maxillary 1st Molar: Mesial What cusps are visible from this view?

MB & ML (+cusp of carabelli)

What view of the maxillary 1st molar is this?

Mesial view

Maxillary 1st Molar: Mesial From this view what is the: Buccal height of contour? Lingual height of contour? Mesial contact area?

Buccal height of contour- cervical 1/3 Lingual height of contour- middle 1/3 Mesial contact area- middle 1/3 offset to buccal

Maxillary 1st Molar: Mesial What roots are visible from this view? What root is covered?

Visible- MB & Lingual root DB root is hidden (by MB root)

Maxillary 1st Molar: Mesial From this view where do we see the level of bifurcation?

3 mm apical to the CEJ

Maxillary 1st Molar: Mesial From this view, what root do we describe as banana shaped? Why?

Lingual root Narrow BL & 50% of the time curves buccally

Maxillary 1st Molar: Distal The crown constricts towards the:

Distal

Maxillary 1st Molar: Distal Due to the crown constricting towards the distal the _____ aspect is visible

Buccal

Maxillary 1st Molar: Distal What cusps are visible?

4 major cusps

Maxillary 1st Molar: Distal How many roots are visible from this view?

Three roots

Maxillary 1st Molar: Distal The bifurcation is about:

5mm apical to CEJ

Maxillary 1st Molar: Distal The distal contact are is in the:

Middle 1/3 & offset buccally

Maxillary 1st Molar: Distal What is anatomical feature is present in the cervical area?

DB concavity

Maxillary 1st Molar: Occlusal What is the geometric outline?

Rhomboidal

Maxillary 1st Molar: Occlusal For the rhomboidal geometric outline what contributes to the acute angles & what contributes to the obtuse angles?

Acute angles: MB & DL Obtuse angles: ML & DB

Maxillary 1st Molar: Occlusal The crown is wider _____ than ______

Buccolingually than mesiodistally

Maxillary 1st Molar: Occlusal The _____ aspect is greater than the ____ aspect

Mesial aspect > distal aspect

The maxillary first molar is the only tooth which broadens:

Toward the lingual

On the maxillary first molar, describe the MD width lingually & buccally

MD width is greater on the lingual side than on the buccal side

Label the lingual & buccal sides of this image

Top- Buccal (narrower) Bottom- Lingual (Wider)

Maxillary 1st Molar: Occlusal Rank the cusps in order of largest to smallest:

(Largest) ML > MB > DB > DL > Cusp of Carabelli

Maxillary 1st Molar: Occlusal The ML, MB & DB cusps form the:

Primary molar triangle (trigon)

Maxillary 1st Molar: Occlusal What forms the trigon?

ML, MB, DB cusps

Distal cusp ridge of the ML cusp & the triangular ridge of the DB cusp form the:

Oblique ridge

Maxillary 1st Molar: Occlusal What are the two major fossae present?

Central fossa & distal fossa

Fossa that lies in the center of the trigon mesial to the oblique ridge & rougly triangular

Central fossa

Maxillary 1st Molar: Occlusal The central fossa lies in the center of the trigon ____ to the ______

Mesial to the oblique ridge

Maxillary 1st Molar: Occlusal Fossa that is distal to the oblique ridge & roughly linear

Distal fossa

Maxillary 1st Molar: Occlusal The distal fossa is _____ to the ____ ridge

Distal; oblique

Maxillary 1st Molar: Occlusal In addition to the two major fossa, _____ minor fossa are also present

two

Maxillary 1st Molar: Occlusal The two minor fossa include:

Mesial triangular fossa Distal triangular fossa

Label all four of the occlusal fossa on the maxillary first molar & categorize as major or minor:

Left blue: distal triangular fossa (minor) Right blue: mesial triangular fossa (minor) Center red: central fossa (major) Red oval: distal fossa (major)

Maxillary 1st Molar: Occlusal At junction of central developmental groove, buccal groove, & transverse groove of oblique ridge

Central pit

Maxillary 1st Molar: Occlusal The central pit is located at the junction of:

Central developmental groove, buccal groove, transverse groove of the oblique ridge

Maxillary 1st Molar: Occlusal At junction of the distal oblique groove & lingual groove

Distal pit

Maxillary 1st Molar: Occlusal The distal pit is at the juntion of the:

Distal oblique groove & lingual groove

When root divides into three roots

Trifuraction

Maxillary first molar: root Name each level of Furcation & which is the greatest:

Mesial, buccal, distal Distal = greatest

Maxillary 1st molar Proximal contacts Mesial: Distal: Heights of contour Buccal: Lingual

Mesial @ Middle 1/3 offset to buccal Distal @ Middle 1/3 offset to buccal Buccal @ cervical 1/3 Lingual @ middle 1/3

Label the following views of this tooth; what tooth is this?

Maxillary 1st molar Top left: buccal Top right: lingual Bottom left: mesial Bottom right: distal Middle: occlusal

Maxillary 2nd molars: Compared to the maxillary first molar the crown is:

Smaller, shorter, more rhomboidal

Maxillary 2nd molars: How many occlusal types, name them & what is the most common:

2 occlusal types Rhomboidal & Heart shaped Rhomboidal= most common

Maxillary 2nd molars: The rhomboidal occlusal type resembles the _____ molars The heart-shaped occlusal type resembles the _____ molars

1st molars 3rd molars

Maxillary 2nd molars: Compared to the maxillary 1st molar, the DL cusp on the maxillary second is:

Smaller

Maxillary 2nd molars: What cusp is not present on this tooth when compared to the maxillary 1st molar

Cusp of Carabelli

Maxillary 2nd molars: Compared to the maxillary 1st molar, the crown is:

Shorter

Maxillary 2nd molars: Compared to the maxillary first molar, the roots are ____ & are more _____

As long or longer; more distally inclined

What tooth is shown, label each view:

Maxillary 2nd molar Top left- buccal Top right- lingual Bottom left- mesial Bottom right- distal Middle- occlusal

Maxillary 2nd molars: Buccal Compared to the maxillary first mole: 1- the crown is _____ & narrower _____ 2- the DB cusp is _______ 3- the roots are more _____ 4- the roots are more inclined to the ______ 5- the MB root apex is in line with _____

1- shorter; narrower MD 2- smaller 3- parallel 4- inclined to distal 5- buccal groove

Maxillary 2nd molars: lingual The DL cusp is ______ compared to the maxillary 1st molar

Smaller

Maxillary 2nd molars: lingual The lingual root is _______ MD

Narrower

Maxillary 2nd molars: lingual The lingual root is inclined ____

Distally

In the maxillary 2nd molar the apex of the root lines up with the ______ while in the maxillary 1st molar the apex of the root lines up with the ______

DL cusp tip Lingual groove

Maxillary 2nd molars: lingual What cusp is not present in this tooth

Cusp of carabelli

Maxillary 2nd molars: Mesial This view is similar to the maxillary 1st molar but the crown height is:

Shorter

Maxillary 2nd molars: Mesial The BL width is _____ compared to the maxillary 1st molar

The same

Maxillary 2nd molars: Mesial The roots do not diverge as much meaning that they are:

Confined within the crown width

Maxillary 2nd molars: mesial The contact area is in:

Middle 1/3 offset to buccal

Maxillary 2nd molars: distal The crown converges toward:

Distal

Maxillary 2nd molars: distal Compared to the maxillary first molar the DB & DL cusps are:

Smaller

Maxillary 2nd molars: distal From this view, why is more of the occlusal surface & ML cusp visible (compared to maxillary 1st)

Because the DB & DL cusps are smaller

Maxillary 2nd molars: distal The distal contact area is in:

Middle 1/3 offset buccally

Maxillary 2nd molars: distal How many roots visible from this view?

All three roots visible

Maxillary 2nd molars: Occlusal The geometrical outline is more _____ compared to the maxillary first

Rhomboidal

Maxillary 2nd molars: Occlusal Compared to the maxillary first the _____ dimension is similar while the _____ dimension is smaller

Buccolingual Mesiodistal

Maxillary 2nd molars: Occlusal Compared to the maxillary 1st molar, the DB & DL cusps are:

Less developed

Maxillary 2nd molars: Occlusal The tooth contracts towards the ______ & converges towards the ______

Distal Lingual

Maxillary 2nd molars: Occlusal Compared to the maxillary 1st molar this tooth overall showed a more variable _____ & _____ anatomy

Pit & groove

Maxillary 2nd molars: Occlusal Some maxillary second molars have no _____ resulting in a ____ shape

DL cusp Heart shaped

Maxillary 2nd molars: Roots Most of the time how canals are present in the following roots: MB: DB: Lingual:

MB: 1 (most of the time) DB: 1 Lingual: 1

Name the cross section of these roots- what tooth is this for?

Maxillary 2nd molar Left: DB Middle: lingual Right: MB

Maxillary 2nd molar: Proximal contacts Mesial: Distal: Height of contour Buccal: Lingual:

Mesial @ middle 1/3 offset to buccal Distal @ middle 1/3 offset to buccal Buccal @ cervical 1/3 Lingual @ middle 1/3