Mandibular Molars Flashcards
The mandibular molars are considered the:
Largest mandibular teeth
In the mandibular 1st molar there are generally ___ cusps, while in the mandibular 2nd molar there are generally ____ cusps.
5 cusps; 4 cusps
Mandibular molars are broader ____ than _____.
MD than BL
The mandibular molars are broader ______ while the maxillary molars are broader _____.
MD; FL
The mandibular 1st molar: How many cusps are there? Name them
5 cusps- 3 buccal 2 lingual
Mesiobuccal, distobuccal & distal (buccal)
Mesiolingual & distolingual (lingual)
The mandibular 1st molar How many roots are present? Name them
2 roots- mesial root & distal root
The 2 roots of the mandibular 1st molar are broad:
BL
The mesial root of the mandibular 1st molar curves ___ while the distal root is pointed in a ____ direction
Distally; distal direction
The mandibular 1st molar: Buccal Aspect:
Geometric outline:
Trapezoidal
The mandibular 1st molar: Buccal Aspect:
How many cusps are visible from this view?
All 5 cusps
The mandibular 1st molar: Buccal Aspect:
List the order biggest to smallest of the buccal cusps
MB> DB> distal cusp
The mandibular 1st molar: Buccal Aspect:
How many grooves can be seen from this aspect? Name them:
2 grooves- MB developmental groove & DB developmental groove
The mandibular 1st molar: Buccal Aspect:
The MB developmental groove is ___ compared to the DB developmental groove:
Shorter
The mandibular 1st molar: Buccal Aspect:
The MB developmental groove terminates in the:
The DB developmental groove terminates in the:
Middle 1/3 of tooth
cervical 1/3 of tooth
The mandibular 1st molar: Buccal Aspect:
The cervical line curves:
Apically
The mandibular 1st molar: Buccal Aspect:
The mesial height of contour:
Middle 1/3
The mandibular 1st molar: Buccal Aspect:
Describe the mesial outline:
Convex and concave
The mandibular 1st molar: Buccal Aspect:
Describe distal height of contour:
Middle 1/3 on distal aspect of distal cusp
The mandibular 1st molar: Buccal Aspect:
Describe the distal outline:
Convex and straight
What view of the mandibular 1st molar is this? Label the grooves
Buccal view
A: DB developmental groove
B: MB developmental groove
The mandibular 1st molar: Buccal Aspect: Roots
Name the 2 roots:
Mesial and distal
The mandibular 1st molar: Buccal Aspect: roots
The mesial root is ____ and curves ____ to a ______
Straight; distally; tapered apex
The mandibular 1st molar: Buccal Aspect: Roots
The distal root points ____ to a _____
Points distally to a more tapered apex
The mandibular 1st molar: Buccal Aspect:
The roots are ____ on the buccal than on the lingual
Wider MD
The mandibular 1st molar: Buccal Aspect: Roots
Are there developmental depressions on the roots? If so where at?
Developmental depressions on the mesial and distal aspects of each root
The mandibular 1st molar: Buccal Aspect: roots
There developmental depression buccally on the:
Root trunk from CEJ to furcation
The mandibular 1st molar: Lingual Aspect:
From this aspect how many cusps are visible? Name them
3 visible cusps; ML, DL, and Distal
The mandibular 1st molar: Lingual Aspect:
Describe the sizes of the ML and DL cusps in relation to one another
ML is larger (wider and taller)
The mandibular 1st molar: Lingual Aspect:
What anatomical feature can we see from this aspect?
Lingual developmental groove
The mandibular 1st molar: Lingual Aspect:
Mesial and distal aspects of the crown are visible from the lingual aspect due to the:
Lingual convergence
The mandibular 1st molar: Lingual Aspect:
How many roots can se see from this aspect?
2
The mandibular 1st molar: Lingual Aspect:
The roots measure longer on the ____ than ___
Lingual than buccal
The mandibular 1st molar: Lingual Aspect:
The bifurcation is in line with:
Lingual developmental groove
The mandibular 1st molar: Mesial aspect:
What is the geometric outline:
Rhomboidal
The mandibular 1st molar: Mesial aspect:
What cusps are visible from this aspect?
2 cusps- MB and ML
The mandibular 1st molar: Mesial aspect:
How many roots are visible form this aspect?
1 root- mesial root
The mandibular 1st molar: Mesial aspect:
Describe the buccal height of contour:
In cervical 1/3 (buccal cervical ridge)
The mandibular 1st molar: Mesial aspect:
What is another name for the buccal height of contour (specific to this tooth)
Buccal cervical ridge
This blue dot shows what anatomical feature?
Buccal cervical ridge
The 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 tile to the root axis, this is characteristic of:
Mandibular molars and mandibular premolars
The mandibular 1st molar: Mesial aspect:
The lingual height of contour is:
In middle 1/3
The mandibular 1st molar: Mesial aspect:
The cervical line curves:
Occlusally
The mandibular 1st molar: Mesial aspect:
The cervical line is higher ____ than ____
Lingually than buccally
The mandibular 1st molar: Mesial aspect:
The root apex lies:
Under MB cusp
The mandibular 1st molar: Mesial aspect:
What can be seen on the root?
A slight mesial developmental depression
The mandibular 1st molar: Distal aspect:
Describe the visibility from this aspect compared to the mesial aspect:
More tooth is visible
The mandibular 1st molar: Distal aspect:
What cusp is visible from this aspect?
DB cusp
The mandibular 1st molar: Distal aspect:
How many roots are visible from this aspect
2
The mandibular 1st molar: Distal aspect:
The distal marginal ridge is ___ & dips _____
Shorter and dips cervically
The mandibular 1st molar: Distal aspect:
What groove is visible from this aspect?
DB developmental groove
The mandibular 1st molar: Distal aspect:
From this aspect, the DB developmental groove is visible and end on ____ at the ____
Distal surface at the distobuccal line angle
What groove is seen and what aspect is this?
Distal aspect, DB developmental groove
The mandibular 1st molar: occlusal aspect:
Geometric shape of this aspect?
Hexagonal
The mandibular 1st molar: occlusal aspect:
From this aspect, the width of the crown is greater ____ than ____
MD than BL
The mandibular 1st molar: occlusal aspect:
In MD terms, the crown is wider _____ and tapers ____
Mesially; distally
The mandibular 1st molar: occlusal aspect:
In BL terms, the crown is wider _____ and tapers _____
Buccally; lingually
Label the sides of this image from the occlusal view of the mandibular 1st molar:
Left: mesial
Right: distal
Top: buccal
Bottom: lingual
The mandibular 1st molar: occlusal aspect:
Rank the cusps based on size from largest to smallest:
MB> ML >=DL>DB>D
The mandibular 1st molar: occlusal aspect:
Aside from the occlusal surface, what other surface is mostly visible from this aspect?
Buccal surface
The mandibular 1st molar: occlusal aspect:
How many major fossa are seen? What are the names?
1 major fossa, central fossil
The mandibular 1st molar: occlusal aspect:
Describe the central fossa
Circular & centrally placed between cusp ridges
The mandibular 1st molar: occlusal aspect:
How many minor fossa are present? Specify the names:
2 minor fossa: mesial triangular and distal triangular fossa
The mandibular 1st molar: occlusal aspect:
List the developmental groove visible from this aspect:
Central developmental groove, mesiobuccal developmental groove, distobuccal developmental groove and lingual developmental groove
Label the grooves:
Yellow: MB developmental groove
Orange: central developmental groove
Red: DB developmental groove
Brown: lingual developmental groove
The mandibular 1st molar: occlusal aspect:
What are the boundaries of the central fossa: (6)
- Distal slope of MB cusp
- Mesial and distal slopes of DB cusps
- Mesial slope of distal cusp
- Distal slope of ML cusp
- Mesial slope of DL cusp
- Triangular ridges of the MB, D, DL and ML cusps
Grooves on the mandibular first molar:
Buccal:
Lingual:
Mesial:
Distal:
Buccal- DB and MB developmental grooves
Lingual: Lingual developmental groove
Mesial: none
Distal: DB developmental groove
The mandibular 2nd molar compared to the mandibular first, the size of the mandibular second molar is:
smaller
The mandibular 2nd molar: How many cusps are present? Name them:
4 cusps: MB, ML, DB, DL (no 5th distal cusp)
What is the 5th additional cusp that is present on the mandibular 1st molar but not the second?
Distal cusp
The mandibular 2nd molar: How many roots? Name them:
2 roots: mesial and distal roots
The mandibular 2nd molar: buccal aspect: compared to the 1st mandibular molar this tooth appears:
Shorter and narrower
The mandibular 2nd molar: buccal aspect: How many cusps are visible?
All 4 cusps- ML, MB, DL, DB
The mandibular 2nd molar: buccal aspect: What separates the 2 buccal cusps?
Buccal developmental groove
The mandibular 2nd molar: buccal aspect: The buccal developmental groove separates what 2 cusps
MB and DB cusps
The mandibular 2nd molar: buccal aspect: The mesial and distal contacts:
Middle 1/3
The mandibular 2nd molar: buccal aspect: The cervical line points toward:
Bifurcation
The mandibular 2nd molar: buccal aspect: compared to the mandibular 1st molar, the roots are:
Shorter, closer and more parallel
The mandibular 2nd molar: buccal aspect: compared to the mandibular 1st molar, the roots are more:
More inclined distally
The mandibular 2nd molar: lingual aspect: the converges toward the lingual but:
Less than the mandibular 1st molar
The mandibular 2nd molar: mesial aspect: compared to the mandibular 1st molar the buccal curvature and buccal cervical ridge is:
Less pronounced
The mandibular 2nd molar: mesial aspect: compared to the mandibular 1st molar, the cervical line is:
Less curved
The mandibular 2nd molar: mesial aspect: compared to the mandibular 1st molar, the mesial root is:
More pointed at apex
The mandibular 2nd molar: distal aspect: what is absent in this tooth compared to the mandibular 1st molar?
Distal cusp
The mandibular 2nd molar: distal aspect: describe the distal contact:
Centered BL and the contact is in the middle 1/3 occlusocervically
The mandibular 2nd molar: occlusal aspect: what is the geometric outline?
Rectangular in shape
The mandibular 2nd molar: occlusal aspect- compared to the mandibular 1st, what cusp is more prominent?
DB cusp
The mandibular 2nd molar: occlusal aspect: compare the 4 cusps from this view:
Relatively equal in size
The mandibular 2nd molar: occlusal aspect
What groove are present?
Central groove, lingual groove, buccal groove (no DB groove)
The mandibular 2nd molar: occlusal aspect- what shape do the occlusal grooves form?
Cross
The 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 developed from ____ lobes while the mandibular 2nd molar develops from _____ lobes
5; 4
Both the maxillary and mandibular 3rd molars are considered:
The most variable teeth in the mouth
The mandibular 3rd molars are usually similar to:
The other mandibular molars
Mandibular 3rd molars: list the anomalies often seen:
Oversized crowns
Maxillary 3rd molars: list the anomalies commonly seen:
Undersized crowns
Which molars are commonly impacted?
Mandibular 3rd
Mandibular 3rd molars: from the buccal view, how many cusps and how many roots are seen?
2 cusps; 2 roots
Mandibular 3rd molars: from the lingual aspect are:
Similar to 1st and 2nd mandibular molars
Mandibular 3rd molars: from a mesial view: the root is:
Shorter and more tapered
Mandibular 3rd molars: from a distal view:
Similar to mesial but narrower
Mandibular 3rd molars: from an occlusal view, compared to the other mandibular molars they look:
More rounded