Final Part TRES-Posteriors Flashcards
Perm Max 1st PM-Mesial Vantage point: The mesial proximal contact area is located just ______ to the facial segment. It is also ______ to the mesial marginal groove.
cervical (so its close to the occlusial surface)…..FACIAL to the Mes Mar Groove
Perm Max 1st PM- Occlusial Pic> The M and D triangular fossae are _______. ALSO they are _____ to the M and D occlusial outlines.
far apart…..but CLOSE to the M and D outlines (makes sense!)
Perm MAX 2nd PM–[Occlusial View]–The triangular ridges are approx ___________ in length.
The same in length
Perm MAX 2nd PM–[Occlusial View]– The point where the triangular ridges meet is slightly ______ to the FL bisector.
Lingual
Perm MAX 2nd PM–[Occlusial View]–Is there a TRUE/CONTINUOUS transverse ridge?
NO… c/o the central groove separating the triangular ridges
Which tooth am I describing? The lingual cusp is not supported by the root structure. In fact, the lingual cusp tip actually is more lingually positioned than the confines of the lingual root surface.
Perm Man 1st PM (very apparent from the M view)
Perm Man 1st PM-Occlusial; The M triangular fossa has a M groove at the bottom of it that is ______ in shape and is continuous with the ___ groove.
Linear….ML groove
Perm Man 2nd PM-Occlusial View–What are the two shapes? What is the deciding factor?
5 sided (pentagonal)-WELL DEVELOPED FACIAL RIDGE or square
Perm Max 1st Molar Lingual view: The M cuspal ridge of the ML cusp meets the relatively straight M outline of the crown at a ___ degree angle.
90 degree
Perm Max 1st Molar{DISTAL} The outline of the lingual (palatal) root will be similar to that seen from a _____ view and its ______ shaped!!
Mesial view…Banana shaped!!
Perm Max 1st Molar{DISTAL} The apex of the lingual root is vertically positioned between the greatest lingual contour of the crown and the tip of the ___ cusp. Which cusp is it NOT lined up with?
In between the greatest lingual contour and the DL cusp….It is NOT in line with the ML cusp AT ALL!!!
Perm Max 1st Molar-Occlusial….. The low point of the oblique ridge is ________ as the depth of the mesial and distal marginal ridges.
at the same level (SO the oblique ridge is the same height as the marginal ridges!)
Perm Max 1st Molar-Occlusial…..What is the name of the groove where the oblique ridge has its lowest point?
The TRANSVERSE groove OF the OBLIQUE ridge…AWESOME name
Perm Max 2nd Molar–‘Occlusial’ What is the most lingually and distally placed cusp?
the DL cusp…not a trick question :)
Perm Max 2nd Molar–‘Occlusial’ The distal oblique groove extends from the distal triangular pit in a lingual direction ______ to the oblique ridge and continues onto the lingual surface as the _______.
parallel…lingual groove!
Perm Manny 1st Molar occlusial–Which half (F or L) of the crown is MUCHO wider? POR QUE?
The facial half of the crown is much wider than the lingual half, because of the three facial cusps. (causes a taper from F to L)
Perm Manny 1st Molar occlusial–The _______ runs MDally in an _______ direction across the occlusial surface from the mesial triangular pit, through the central fossa, and to the distal triangular pit.
central groove….irregular
Perm Manny 1st Molar occlusial–The lingual groove starts in the ______ and travels MINIMALLY over the ______.
Central pit….lingual surface
Perm Mand 2nd Molar, Occlusial: The greatest FL measurement is in the ______ half of the crown because the _______ is more prominent on the MF cusp.
Mesial Half…Cervical Ridge
Perm Mand 2nd Molar, Occlusial: The facial groove and lingual groove meet the central groove at _____ angles dividing the occlusial surface into M and D halves.
Right angles
Perm Mand 2nd Molar, Occlusial: The ___ major grooves present a structure which is said to be a “____” or a “_____” design or even a “____” arrangement because the 4 cusps of equal sign with a plus sign dividing them.
3(tricky tricky)…..”+” or a “cross”….”4+”
