300 Dental Anatomy: Maxillary Molars Flashcards
The occlusal outline form of an occlusal view for the maxillary 1st molar is what shape?
Rhomboidal
MX 1M: The Mesiofacial (MF) and Distolingual (DL) angles from the occlusal outline tend to be:
Acute
MX 1M: The Mesiolingual (ML) and Distofacial (DF) angles from the occlusal outline tend to make what type of angle?
Obtuse
What angles make up the oblique ridge?
ML + DF
*obtuse angles
Maxillary 1st molar tends to taper towards the ____.
Buccal
The ____ embrasure is larger is MX 1M.
buccal
The side most prone to caries on the MX 1M is the:
Lingual
The largest root of the maxillary first molar is the:
Palatal (lingual)
The smallest root of the maxillary first molar is the:
Distobuccal
From the facial view, the apex of the lingual root is in line with the ______ of the maxillary 1st molar.
facial groove
From the lingual view, the palatal root is in line with the _______ of the maxillary 1st molar.
Midpoint of the MD diameter
When a 4th pulp canal is prsent in a maxillary 1st molar it is located in which canal?
MB canal
Which furcation is the closest to the cervical line in a maxillary first molar?
Mesial
Which furcation is the furthest from the cervical line in a maxillary 1st molar?
Distal
The oblique ridge of the maxillary 1st molar develops which boundary of the central fossa?
Distal boundary of the central fossa
The obtuse corners of the maxillary 1st molar coincide with:
The direction of the oblique ridge
The center of the oblique ridge on a maxillary 1st molar is at the same level as the height of the:
Marginal ridge
The oblique ridge connects which cusps?
ML + DB
The ML cusp of the maxillary 1st molar occludes in:
central fossa of the mandibular molars
Greatest FL diameter of the crown for ALL teeth:
Maxillary 1st molar
*think cusp of carabelli
Maxillary 1st molar has a wider MD width toward the ___
lingual
*MD width is longer on lingual side than buccal side
The only cusp that is not a part of the molar cusp triangle of the maxillary first molar:
DL
Largest and longest posterior cusp of the maxillary 1st molar is:
ML
Which tooth is most likely forced into the maxillary sinus during extraction?
MX 1M
Which tooth has a DISTAL concavity that can pose special problems in matrix placement?
MX 1M
Which tooth has a MESIAL concavity that can pose special problems in matrix placement?
MX 1PM
Which tooth has a shorter DL groove: Maxillary 1st Molar or Maxillary 2nd molar?
MX 1M
Which cusp is the only one not a part of the molar cusp triangle of the maxillary 2nd molar?
DL
*same as MX 1M!
If the DL cusp is not present on the maxillary 2nd molar, you will have what shape?
Heart-shaped! (3-cusp type)
The roots of the maxillary 2nd molar tend to be:
Less divergent and have greater distal inclinations
*Basically, the roots are more smushed between the two molars - so they drift towards the back more (distally)
The cross sectional outline at the cervical for maxillary 2nd molar is what shape?
Triangular
