Q4-ManMolars Flashcards
Perm Man 1st Molar, Facial- What is the general outline of the MF cuspal ridges?
Almost a FLAT angle
Perm Man 1st Molar, Facial-What is the most pointed Facial cusp?
the Distal Cusp
Perm Man 1st Molar, Facial–The DF cusp has cuspal ridges that give rise to a more _______ cusp then the MF, but its still ______.
More POINTED then the MF cusp, but still ROUNDED
Perm Man 1st Molar, Facial-Why does the Distal cusp comprise a very small part of the total MD width of the facial surface?
MOST of the cusp is LINGUAL to the DF Line angle (so it is in the D aspect of the tooth)
Perm Man 1st Molar, Facial-Which facial groove is shorter?
MF groove is shorter than the DF groove
Perm Man 1st Molar, Facial-Where does the MF groove terminate? What does it end in?
Half way to the Cervical Line…Ends in a slight DEPRESSION
Perm Man 1st Molar, Facial-There is a _____ present at the terminus of the MF groove that commonly requires restoration that is termed a “____” or a “_____”.
pit….”facial pit” or “buccal pit”
Perm Man 1st Molar, Facial-The root trunk on the facial aspect measures ___mm on the average.
3.0mm
Perm Man 1st Molar, Facial-There is a deep depression that becomes more progressively shallow as it extends ______ from the ________ to the ________.
Occlusially from the BIFURCATION to the Cervical Line
Which surface of the Man 1st molar has a root depression? Does it cross the cervical line?
Perm Man 1st Molar–FACIAL…NO, it does not cross the cervical line.
Perm Man 1st Molar, Facial-The two roots are positioned ______ and _______.
Mesially and distally
Perm Man 1st Molar, Facial-The roots are usually _______ and more _______ than those of the mandibular 2nd and 3rd molar.
longer and more divergent(spaced further apart from each other)
Which surface of the Man 1st molar has a longer root trunk?
Lingual-4.0mm (Facial-3.0mm)
Perm Man 1st Molar, LINGUAL- When measured on the lingual the total root length is _______ (because the roots are measured form the ______ to the _____)
greater….Cervical line to the apex
Which surface of a man 1st molar has a a longer root length?
Lingual
Perm Man 1st Molar, Mesial: What is the mesial crown outline shape?
Rhomboidal
Perm Man 1st Molar, Mesial: The greatest curvature of the facial outline is at the ______ third of the crown. What is its name?
Cervical Third…Cervical Ridge
Perm Man 1st Molar, Mesial: When compared to maxillary molars, the cervical ridge crest is ______.
Higher Occlusially (but still in the cervical third)
Perm Man 1st Molar, Mesial: The angulation of the Triangular Ridge of the ML cusp is approx ___ degrees in relation to What Structure?
30 degrees…the Mesial Marginal Ridge
Perm Man 1st Molar, Mesial: Since the mesial cusps are _____ than the distal cusps on the tooth, very little of the ______ surface can be viewed.
TALLER…occlusial
Perm Man 1st Molar, DISTAL- The facial outline of the distal cusp is located _______ to the facial outline of the taller ___ cusp. This means the entire distal cusp is superimposed onto the ___ cusp.
LINGUAL…DF cusp…DF cusp
Perm Man 1st Molar, DISTAL- WHICH cusp EXCLUSIVELY comprises the distal contact area?
THE DISTAL CUSP
Perm Man 1st Molar, DISTAL- The distal contact area is slightly ______ to the FL bisector of the crown.
slightly facial to the “center” of the crown.
Perm Man 1st Molar, DISTAL-Both the distal and the DF cusp tips are _____ to the apices of the mesial AND distal roots.
FACIAL
Perm Man 1st Molar, Occlusial: What is the most FACIALLY placed cusp?
The DF cusp!
Perm Man 1st Molar, Occlusial: What is the most MESIALLY placed cusp?
The ML cusp!
Perm Man 1st Molar, Occlusial: RANK the cusp sizes from LARGEST to smallest. (bored: go smallest to largest)
Largest:MF—->ML—–>DL—->DF—->D
Permanent SECOND molar, Facial: What divides the MF and DF cusps? What DISTINCT structure does it end in? WHICH THIRD is this distinct structure located?
The Facial (or buccal) Groove…..Ends in the Facial (buccal) Pit…the MIDDLE third of the crown
Permanent SECOND molar, Facial: The facial groove is ______, except for a slight ______ inclination at the facial pit.
VERTICAL….MESIAL
Permanent SECOND molar, Facial: OVERALL the facial groove is located slightly ______ to the vertical line dividing the crown in half(mesiodistally).
distal (this makes the MF cusp wider then the DF cusp)
Permanent SECOND molar, Mesial- The tip of the ___ cusp is closer to the “vertical faciolingual long axis bisector” (center of the crown) than the greatest ______ outline of the crown.
MF cusp…..greatest facial outline (aka-its TILTED in)
Permanent SECOND molar, occlusial: The tips of both facial cusps, ESPECIALLY the MF cusp, are located farther _______ from the facial outline of the crown when compared to the Lingual cusps in relation to the Lingual outline.
LINGUALLY (aka-the facial cusp tips are farther away from the facial outline and the lingual cusp tips are closer to the lingual outline)
Permanent SECOND molar, occlusial: The facial groove and the lingual groove meet the central groove at ______ angles.
Right angles
Permanent SECOND molar, occlusial: What divides the occlusion surface into M and D halves?
the F and L grooves
Permanent SECOND molar, occlusial: The three major grooves meet to form a “____” or “_____” design.
“plus” or cross”
Permanent SECOND molar, occlusial: Since the three major grooves divide the cusps into approximately equal sizes, it is called a “___” arrangement.
“4+”
Permanent SECOND molar, occlusial: The _______ pit forms where the facial, lingual, and central grooves meet.
Central Pit
Permanent SECOND molar, occlusial: The central pit is located on the ______ half of the crown.
LINGUAL
Permanent SECOND molar, occlusial: What anatomical structures are at the ends of the central groove?
Mesial Triangular Fossa and Distal Triangular Fossa
Permanent SECOND molar, occlusial: What anatomical structure is found at both the mesial triangular fossa and the distal triangular fossa?
the mesial triangular PIT and the distal triangular PIT
Permanent SECOND molar, occlusial: Each cusp has M and D ______ ridges extending laterally, as well as a ______ ridge that extends toward the central _____.
cuspal ridges….triangular ridge…central fossa
Permanent SECOND molar, occlusial: On MOST specimens the triangular ridges meet to form two _______ ridges.
2 transverse ridges
Perm Man 3rd Molar, Facial- the 2 facial cusp variety of the facial groove ends in a ______.
Facial Pit
Perm Man 3rd Molar, Facial- The facial pit is in the ______ third.
Middle third.
Perm Man 3rd Molar, Facial- What structure exhibits decay because it is difficult for the Pt to clean in this area of the mouth?
The Facial Pit!
Perm Man 3rd Molar, Mesial: The central groove is positioned ______ to the FL long axis bisector(middle of tooth from mesial view).
LINGUAL (like ALL mandibular molars!)
Perm Man 3rd Molar, Occlusial: The crown is wider ______ than it is ____.
wider MD then FL (so “pinch” facial-lingually)
