L7 MAND PREMOLARS Flashcards
Numbers of mandibular left and right 1st premolars
Left = 21 Right = 28
Numbers of mandibular left and right 2nd premolars
Left = 20 Right = 29
Do succedaneous or non succedaneous teeth replace primary molars
Succedaneous teeth
Mandibular first premolar develops from how many lobes
4 = 3 facial, 1 lingual
Mandibular second premolar develops from how many lobes
4 or 5 = 3 facial, 1 or 2 lingual
From buccal view of mandibular first premolar, what is iits shape
Trapezoidal
From buccal view of mandibular first premolar, the well developed middle buccal lobe becomes the prominent ____ ridge
Buccal ridge
From buccal view of mandibular first premolar, the buccal cusp resembles the mandibular _______ but the cusp tip is more _____
Resembles mand canine but the cusp is is more rounded
From buccal view of mandibular first premolar, the mesial slope of the buccal cusp is ______ than the distal slope of the buccal cusp
Shorter (this opposite of maxillary 1st PM, the ML is longer the DL)
From buccal view of mandibular first premolar, the mesial and distal outline are slightly ______
Slightly concave
From buccal view of mandibular first premolar, the M and D heights of contour are in the
Middle 1/3
From buccal view of mandibular first premolar, the cervix is much ______ mesiodistally than the crown width at contact areas
Much narrow MD
From buccal view of mandibular first premolar, the cervical line exhibits _____ curvature
Little curvature
From buccal view of mandibular first premolar, buccal surface is ______ especially at the cervical and middle 1/3
Convex
From buccal view of mandibular first premolar, the root length is ____ than the canine.
Root is shorter than canine
From buccal view of mandibular first premolar, the root curves in which direction
Curves distally
From lingual view of mandibular first premolar, crown and root taper toward the ________
Lingual
From lingual view of mandibular first premolar, the lingual cusp is small and may resemble the
Cingulum of a canine
From lingual view of mandibular first premolar, the occlusal surface slopes ____ in a _____ directions.
Slopes lingually in a cervical direction -visible from lingual view
From lingual view of mandibular first premolar, its smoothly _____ in all directions
Convex
From lingual view of mandibular first premolar, M and D outline are concave from where to where
Concave from cervical margin to contact areas
From lingual view of mandibular first premolar, what demarcates the lingual lobe from the mesiobuccal lobe
Mesiolingual developmental groove
From lingual view of mandibular first premolar, what separates the marginal ridge from the lingual cusp
Mesiolingual developmental groove
From lingual view of mandibular first premolar, the root tapers in which direction and what aspects are visible
Tapers lingually, mesial and distal aspects are visible
From lingual view of mandibular first premolar, the root tapers in to a point
Apex
From lingual view of mandibular first premolar, on the mesial side of the root what will you find
Developmental depressions/developmental grooves
From mesial view of mandibular first premolar, what is the outline
Rhomboidal
From mesial view of mandibular first premolar, the buccal outline is very
Curved/convex
From mesial view of mandibular first premolar, the buccal cusp tip located where in relation to the midline
Centered over the midline of the root
From mesial view of mandibular first premolar, the buccal height of contour is
At the junction of the middle and cervical 1/3
From mesial view of mandibular first premolar, the lingual outline is less
Convex
From mesial view of mandibular first premolar, the lingual height of contour is in
The middle 1/3 of the crown height
From mesial view of mandibular first premolar, the lingual height of contour is ______ to the outline of the root
Lingual (overhangs root trunk)
From mesial view of mandibular first premolar, lingual cusp tip on a line with the
Lingual border of the root
From mesial view of mandibular first premolar, the distance from the CEJ to the lingual cusp tip is ____ distance from the CEJ to the buccal cusp tip
2/3 distance
From mesial view of mandibular first premolar, mesial marginal ridge slopes
Cervical from buccal to lingual
From mesial view of mandibular first premolar, mesiolingual development groove separates
Mesiobuccal lobe from the lingual lobe
From mesial view of mandibular first premolar, cervical line curves _____
Occlusally
From mesial view of mandibular first premolar, the mesial surface is smoothly ____ except for ___
Smoothly convex, except for the mesiolingual developmental groove
From mesial view of mandibular first premolar, root outline is tapered to a pointed
Apex
From mesial view of mandibular first premolar, what cane be found of the surface of the root
Deep developmental - depression groove
Explain the height relationship of the mesial and distal marginal ridges of the mandibular first premolar
The distal marginal ridge is higher above the CEJ than the mesial marginal ridge
What is the only tooth in which the mesial marginal ridge is at a lower level than he distal marginal ridge
The mandibular first premolar
From distal view of mandibular first premolar, distal marginal ridges are at what angle to the long axis of the tooth
Almost at right angles to the long axi
From distal view of mandibular first premolar, is smoothly convex but may have a concaviity where
Above the cervical extending buccolingually
From distal view of mandibular first premolar, the distal contact is ______ than mesial
Broader
From distal view of mandibular first premolar, distal height of contour is in
Middle 1/3
From distal view of mandibular first premolar, will the cervical curvature is going to be less, more, or similar to the mesial curvature
Less or similar
From distal view of mandibular first premolar, the root is more ____ than mesial and less _____
More convex and less grooved (they have shallow deep depressions but no deep groove)
From occlusal view of mandibular first premolar, what iis its outline
Diamond
From occlusal view of mandibular first premolar, what ridge and cusp are very pronounced
Buccal cusp and ridge
From occlusal view of mandibular first premolar, what is the size of the lingual cusp
Small
From occlusal view of mandibular first premolar, the mesiobuccal cusp ridge is _____ than Seth distobuccal cusp ridge
MB shorter than DB
From occlusal view of mandibular first premolar, the crown is wider ______ than _______
Wider buccally than lingually
From occlusal view of mandibular first premolar, what converges to form a small lingual cusp
Mesial and distal marginal ridges that are well develop
From occlusal view of mandibular first premolar, MB and DB line angles are prominent and what shape
Rounded
From occlusal view of mandibular first premolar, mesial and distal contacts are centered _____
Buccolingually
From occlusal view of mandibular first premolar, the buccal and lingual triangular ridges join together to for a single ridge called the
Transverse ridge
From occlusal view of mandibular first premolar, is the buccal or lingual triangular ridge larger
Buccal triangular ridge is larger
From occlusal view of mandibular first premolar, cusps are separated by a ______ groove
Central groove like in maxillary premolars
From occlusal view of mandibular first premolar, the transverse ridge separates what two things
Mesial occlusal fossa from the distal occlusal fossa
Occlusal = triangular !
From occlusal view of mandibular first premolar, which occlusal (triangular) fossa is larger, mesial or distal
Distal occlusal fossa is larger
From occlusal view of mandibular first premolar, what separates the mesial marginal ridge from the lingual cusp
Mesiolingual developmental groove
How many roots on a mandibular first premolar
Single root
What is the shape of the root of a mandibular 1st premolar
Rounded
Which direction does the root of a mandibular 1st premolar curve
Curves distally
The root of a mandibular 1st premolar is grooved _______ on the mesial and distal surface-which is more marked
Grooved longitudinally. Mesial is more marked
How many cusps types can an mandibular second premolar have
Three cusp = 5 lobes
Two cusp = 4 lobes
From buccal view of mandibular second premolar, the buccal cusp is ______ and _____ pointed than the cusp of the first premolar
Buccal cusp is short and less pointed
From buccal view of mandibular second premolar, mesial and distal contacts appear higher on the crown due to the
Smaller buccal cusp
From buccal view of mandibular second premolar, what are the mesial and distal contact points
Middle 1/3
From buccal view of mandibular second premolar, the root is _______ mesiodistally compare to mandibular first pre molar
Broader mesiodistally
From buccal view of mandibular second premolar, the root apex is ______ blunt compared to the mandibular 1st premolar
Apex is more blunt
From lingual view of mandibular second premolar, the lingual lobes are _____ developed than mand 1st PM
Better devloped
From lingual view of mandibular second premolar, more or less of the occlusal surface is visible compared the mand 1st PM
Less of the occlusal surface is visible
From lingual view of mandibular second premolar, in the 3 cusp type, the two ML and DL cusps are separated by
Lingual groove
From lingual view of mandibular second premolar,the root is _____ mesiodistally
Wide MD but not as wide as buccal aspect
From mesial view of mandibular second premolar, crown and root are ____ buccolingually compared to mandibular 1st PM
Wider BL
From mesial view of mandibular second premolar, buccal cusp tip is or isn’t lingually placed
Isn’t lingually place, differs from Mand 1 PM
From mesial view of mandibular second premolar, the buccal cusper is ____ than seen in Mand 1st PM
Shorter
From mesial view of mandibular second premolar, compared to the man 1st PM, lingual and buccal cusp are more ______ in size
More equal in size
From mesial view of mandibular second premolar, the mesial marginal ridge is at what angel to the long axis of the tooth
Right angle
From mesial view of mandibular second premolar, is there a mesiolingual developmental groove present
No
From mesial view of mandibular second premolar, is the root longer or shorter than Mand 1 PM
Longer and the apex is more blunt
From distal view of mandibular second premolar, why is more of the occlusal surface visible from this view
Because the distal marginal ridge is at a lower level
From occlusal view (3 cusp type) of mandibular second premolar, describe the shape
Square in shape
From occlusal view (3 cusp type) of mandibular second premolar, has two lingual cusp and one buccal, list them from largest to smallest
Buccal > mesiolingual > distolingual
From occlusal view (3 cusp type) of mandibular second premolar, developmental grooves separates the cusps forming a _____ shape on the occlusal surface
Y have = mesial, distal, and lingual developmental grooves
From occlusal view (3 cusp type) of mandibular second premolar, what is the name of the pit the Y shaped grooves create
Central pit
From occlusal view (2 cusp type) of mandibular second premolar, have ____ shaped developmental grooves
H and U shaped
From occlusal view (2 cusp type) of mandibular second premolar, what is the outline shape
Rounded
From occlusal view (2 cusp type) of mandibular second premolar, the mesial and distal marginal ridges converges in what direction
Lingually
From occlusal view (2 cusp type) of mandibular second premolar, is the lingual cusp under or well developed
Well developed
From occlusal view (2 cusp type) of mandibular second premolar, to they have mesial and distal pits where the grooves connect
May or may not
