Maxillary Molars Flashcards
How many roots are present on the maxillary molars?
Three roots
What are the roots present on the maxillary molars?
Two buccal, one lingual
In maxillary molars what root is the largest?
The one lingual
Label the views of these maxillary molars:
Buccal; lingual
The maxillary second molar has ____ cusps, while the maxillary first molar has ____ cusps
Four, five
What cusp is the largest in maxillary molars
Mesiolingual
What are the four cusps of the maxillary second molar:
Distobuccal
Distolingual
Mesiobuccal
Mesiolingual
In maxillary molars what cusps form a trigon or primary cusp triangle:
Mesiolingual
Mesiobuccal
Distobuccal
In maxillary molars the ML, MB & DB cusps form a:
Trigon/ primary cusp triangle
In maxillary molars the ____ cusp is the smallest & ______ in size from 1st to 3rd molar
Distolingual
Decreases
In maxillary molars, the crowns are broader ____ than ____
Buccolingually than mesiodistally
In maxillary molars, the crowns are relatively short:
Occlusion-cervically
In maxillary molars the DB cusp is connected to the ML cusp by an:
Oblique ridge
In maxillary molars what forms the oblique ridge
The DB cusp connected to the ML cusp
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
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
Label the following views of the maxillary first molar:
Top left- buccal
Top right- lingual
Middle- occlusal
Bottom left- mesial
Bottom right- distal
Maxillary 1st molar: Buccal
The crown outline is:
Roughly trapezoidal
Maxillary 1st molar: Buccal
What is visible from this view
Parts of the four major cusps
Maxillary 1st molar: Buccal
The distal profile is:
The mesial profile is:
Convex
Convex & flat
What view is this from? Where is mesial & where is distal:
Buccal view
Left- distal
Right- mesial
Maxillary 1st molar: Buccal
Compare the MB & DB cusps:
MB cusp is larger & DB cusp is more pointed
Maxillary 1st molar: Buccal
MB & DB cusps are separated by:
Buccal developmental groove
Maxillary 1st molar: Buccal
The buccal developmental groove separates:
MB & DB cusps
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