Maxillary First Molar Flashcards
Which tooth is known as the 6-year molar?
Maxillary First Molar
Which tooth has the largest crown in the entire mouth?
Maxillary First Molar
Which tooth on the maxillary arch is the largest in overall size?
Maxillary First Molar
Among maxillary molars, which one is least variable n anatomic form?
Maxillary First Molar
What are the dimensions from largest to smallest on a Maxillary First Molar?
FL>MD>OC
What is the geometrical shape of the Maxillary First Molar from lingual and/or facial view?
Trapezoidal (all teeth)
Tapers cervically from facial/lingual view
What is the geometrical shape of the Maxillary First Molar from proximal view?
Trapezoidal and tapers occlusally
What is the geometrical shape of the Maxillary First Molar from occlusal view?
Rhomboidal (but 5 sides)
Leans mesially
Where is the Mesial HOC on a Maxillary First Molar?
Junction of Occlusal and Middle Third
Where is the Distal HOC on a Maxillary First Molar?
Middle Third
Is the entire outer portion of the distal outline from the facial view of the Maxillary First Molar concave or convex?
Distal outline from facial view is convex
What is the comparison of the disco-occlusal an mesial-occlusal angle on a Maxillary First Molar?
Disco-Occlusal angle is more rounded (obtuse)
Mesial-Occlusal angle is much sharper (acute)
From the facial view of a Maxillary First Molar, can one see the distal surface of the tooth?
Distal Surface is visible from facial view due to rhomboidal effect tapering mesially
What is so special about the Cervical line (CEJ) on a facial view of a Maxillary First Molar?
there is a V-Shape dip on a Maxillary First Molar facial view towards the buccal root bifurcation
Which teeth in the entire mouth have the least lingual taper?
Mandibular 2nd premolar 3-cusp variety & Maxillary First Molar
Which cusp is the biggest on a Maxillary First Molar?
Mesiolingual Cusp is the biggest
Which cusp is the sharpest on a Maxillary First Molar?
Distobuccal Cusp is sharpest
Which Tooth has the largest F-L dimension of any tooth?
Maxillary First Molar
What maxillary molar has the least difference between MD & FL? In other words, which maxillary molar has a nearly equal length than any other maxillary molar?
Maxillary First Molar
Which tooth of the maxillary molars does not have lingual taper?
Maxillary First Molar
Which root has the greatest MD dimension in maxillary arch?
Palatal (lingual) root of maxillary molars (First?)
Unique features of maxillary molars only…. (flip over)
Oblique ridge
distolingual groove
Trigone (MB + DB + ML)
Mesiollingual Cusp has 2 ridges (1 from transverse ridge + 1 from oblique ridge)
When we refer to the two facial roots as having a unique shape of pliers, we are speaking about…?
Maxillary First Molar MB + DB roots
Which teeth share a characteristic where the distal proximal contact area is centered both, OC + FL?
Maxillary Lateral Incisor, Canine, First + Second Molar
Mandibular Second Molar
From a facial view a Maxillary First Molar, which cusp can be seen between MB + DB cusp
Mesionlingual cusp
Where is the Facial HOC on a Maxillary First Molar? What is that site called and which way is it more prominent from a facial view?
Facial HOC is located as cervical third due to Bucco-gingival ridge which runs horizontally. It is more prominent mesially
Which groove is found on the lingual surface of the Maxillary First Molar?
Distolingual Groove
Which two cusps does the distolingual groove separate on a Maxillary First Molar?
ML + DL cusps
Which maxillary premolar has a wide MD lingually than facially?
Maxillary First Molar
On which cusp of which tooth is the Cusp of Carabelli found?
Maxillary First Molar ML cusp
What feature does the lingual root of the Maxillary First Molar have that other Maxillary molars do not?
Lingual root of Maxillary First Molar posses a root depression/concavity
From a proximal view of Maxillary First Molar, where does the lingual root lay in comparison to the crown?
Palata root apex is lingual to the crown
From mesial view of the Maxillary First Molar, which cusps are visible?
MB + ML cusps
From distall view of the Maxillary First Molar, which cusps are visible?
all 4 cusps + all of occlusal surface
Does the Maxillary First Molar from the mesial side have a groove?
Maxillary First Molar has a menial groove bisecting the mesial marginal ridge
From which view can one see more of the facial surface and less of the lingual surface on a Maxillary First Molar?
from distal view one can see more facial and less lingual due to its rhomboidal shape (5 sides)
Where is the distal contact of a Maxillary First Molar located on a F-L dimension?
Distal contact area located midway F-L (with other 4 teeth)
Which cusps are acute and obtuse in a Maxillary First Molar?
Acute = MB + DL Obtuse = DB + ML
Which tooth of the entire mouth has the largest F-L dimension of any tooth?
Maxillary First Molar
Of the 3 maxillary molars, which tooth has nearly similar FL and MD dimensions?
Maxillary First Molar has nearly similar FL & MD dimension but FL > MD
Which side of the tooth has a wider MD dimensions on a Maxillary First Molar?
M-D width as wide or wider lingually than facially (Mandibular 2nd premolar as well)
List the largest to smallest cusp size of a Maxillary Molars?
Largest ———————> Smallest
ML > MB > DB > DL
Which cusp of the Maxillary Molars has the most variability from 1st, to 2nd, to 3rd?
DL cusp
Which cusps of the Maxillary First Molar make up the Trigone?
MB + DB + ML
Which tooth (other than the Maxillary Premolar(s)) resembles the Maxillary Premolar
2/3 of the Maxillary First Molar looks like Max Premolar
Which two cusps make up the oblique ridge on a Maxillary First Molar?
DB + ML
True or False
Oblique ridge of the Maxillary First Molar does not have the height as the marginal ridges?
False
Oblique ridge of the Maxillary First Molar has about the same height as the marginal ridge
How many pits and which is the deepest is found on a Maxillary First Molar?
Medial, Central, Distal
Central = Deepest
What are the developmental grooves of a Maxillary First Molar?
Buccal, Central, & Distolingual
How many fossae are found on a Maxillary First Molar?
4 cusps
Medial, Central, Distal, Distolingual
Which root is the longest and largest on a Maxillary First Molar? Widest MD than FL.
Lingual Root is the widest MD than FL of a Maxillary First Molar
Which root has a cervical concavity on a Maxillary First Molar?
DB root
Which root from the three in a Maxillary First Molar can have a possibility of having 2 pulp canals?
MB root of a Maxillary First Molar
