DENT 1512-incisors MOSTLY MN

the distal cervical line curves how much for MN LI?

2 mm [less than MN CI]

what is the greatest extent of curvature of the cervical line for any tooth in MN arch

3 mm toward incisal ridge--cervical line curvature

how far does cervical line curve toward incisal ridge for MN CI?

3 mm--same as MN LI

are there depressions on maxillary incisors?

NO

where is facial height of contour for MN LI?

cervical 1/3 just incisal to the cervical line

how is MN LI root shaped?

cone; convex on labial surface

describe crown concavity on for distal/mesial for MN LI:

deeper crown concavity on the distal than the mesial

from an incisal view describe the shape of the crown of mandibular incisors

diamond

what point angle is closer to mdidle of cingulum--MI or DI--for MN LI?

distal incisal

the root of the mandibular incisors is what shape?

hour-glass shaped (wide labiolingually with mesial and distal root depressions)

the lingual outline of the MN CI crown is similar to what

the mesial outline

how does distal aspect of MN CI compare to mesial view

very similar

describe cervical line curvature for MN LI:

curves ~3 mm toward incisal ridge

which direction does the root curve for MN LI?

either distal or mesial

The area of greatest convexity on the mesial and distal surface has been located in what part of the tooth (for mandibular incisors)

incisal one-third almost level with incisal edge

describe lingual aspect of the crown for MN LI.

series of shallow subtle convexities [mesial marginal ridge, distal marginal ridge, cingulum, lingual aspect of incisal ridge] and a concavity

are there depressions on mandibular incisors

yes

is the cingulum prominent in the lingual outline of MN LI crown view?

yes

what separates the 3 lobes on labial surface of MN LI?

2 developmental depressions

how much does distal cervical line curve for MN CI?

2 mm [same as MN LI]

what is visible on labial surface of MN LI?

3 subtle convexities that demarcate the 3 labial lobes

overall root length compared to crown for MN LI?

3.8 mm longer than crown length

from incisal view what is shape of MN LI?

4 point diamond

facial development depressions on MN LI were found on what percentage of lateral incisors?

51%

what/where is the greatest extent of curvature of the cervical line for any tooth in the mandibular arch?

MN CI; 3 mm toward incisal ridge

The mandibular contact areas differ from the maxillary contact areas of the respective central incisors because

The mandibular central incisor's mesial and distal contact areas are the same height

incisors fcn as what

a group in mastication, esthetics and phonetics function in biting and incising as a team.

what does a trapezoidal facial view do for anterior teeth?

allows for long interdental papilla, better aesthetic result

where does root taper occur for MN CI?

apical 1/2 of root

the mandibular central/lateral icnisor bisects the tooth where and where is the incisal edge?

bisect tooth in 1/2 (labiolingually) incisal edge is on lingual side

the mesial of what tooth has greatest curvature of the cervical line and what is the dimension?

central maxillary incisor 3.5 mm

where are the facial/lingual height of contour for the mandibular central/lateral incisors?

cervical one-third just incisal to the cervical line

where are the anterior heights of contour for ALL anterior teeth?

cervical third

MN LI looks rotated o axis, how does this affect cingulum?

cingulum shifted toward distal

on a FL look, the distal icnisal edge of MN LI is closer to what and why?

closer to cingulum bc it slopes cervically

a cross-section of the root of the maxillary incisors is what shape

conical or triangular

describe the dsital surface of the crown of MN LI.

convex

describe the emsial surface of MN LI crown.

convex

describe mesial surface of MN LI crown

convex near height of contour; rest is flat

describe facial outline of crown

crown is evenly convex in this view at the heights of contour

describe the distal surface of the mandibular incisor crown

crown surface is generally convex

compared to MN CI, what exists on the lateral incisor more?

distal bulge/convexity

all distal depressions relate how to the mesial depressions?

distal depressions are deeper than mesial

The area of greatest convexity on distal surface is located how compared to mesial surface of MN LI

distal surface located more cervical; but still in incisal 1/3

how does the MN LI crown tilt on its root?

distally

central incisors have equal what? this indicates what?

equal contact areas, same level incisal gingivally

describe the mesial surfaces of the mandibular incisor crown

generally convex

describe the permanent MN CI relationship between crown length and crown width

greater crown length [cervical incisal] than crown width [mesiodistally]

how does MN LI root taper?

greater taper in apical 1/2

what is the distal ehight of contour for MN LI?

incisal third of crown but more cervical than mesial height of contour

the lingual height of contour for MN LI is where?

incisal to cervical line

the incisal ridge in maxillary incisors is centred

labiolingually

the crowns of the mandibular incisors are wider ____ than ____

labiolingually than mesiodistally

from incisal view how does mN LI taper?

lingual

the mandibular incisor crown tapers in what direction

lingual

mandibular incisors have the incisal ridge

lingual to a line bisecting the root

lingual aspect of incisal ridge [MN LI] aka:

linguo-incisal ridge

MN LI have a distal proximal contact located how in relation to the mesial proximal contact

located further cervically

where is the convex labial height of contour for MN LI?

located in cervical third of the crown

what tooth has the mesial and distal heights of contour or contact areas (for an ideal alignment of the dentition) are at the same level (mesio-incisal and disto-incisal corners)

mandibular central icnisor

what tooth has the smallest permanent dimensions of all teeth/

mandibular central incisor

what tooth is virtually bilaterally symmetrical from the facial and lingual views

mandibular central incisor

in the maxillary arch, the maxillary central incisor is larger than the maxillary lateral incisor...what is true for the mandibular arch?

mandibular central incisor is smaller than mandibular lateral incisor

what tooth has same height incisal/gingivally

mandibular central/incisor

what teeth has the smallest mesial contact width?

mandibular incisors

which is wider...lateral or central mandibular incisor?

mandibular lateral [OPPOSITE OF MAXILLARY]

who has a wider mesiodistal area...max central or lateral

max central

what tooth has a have a deeper, more well-defined lingual fossa

max central incisor

the incisor cingula is more prominent in what arch?

maxillary

the lingual outline of the crown of MN LI is similar to what outline?

mesial outline

where are the mandibular incisors narrowest?

mesio-distally of all of the permanent teeth.

what is the mesial height of contour [contact area] for MN LI?

mesio-incisal corner of the crown

maxillary central and alteral incisors are wider what way compared to the mandibular coutnerparts?

mesiodistally

the crowns of the maxillary incisors are wider ____ than ____

mesiodistally than labiolingually

where is MN CI crown generally convex?

near crest of curvature (mesial surface)

describe the MN CI incisal ridge

normally lingual to a bisecting line of the root (arch trait)

the incisal ride is normally lingual to what for MN LI?

normally lingual to a bisecting root [arch trait]

what is the canine referred to as?

pentagonal

how is the apex of root for MN LI?

slightly blunt

describe mesial outline of MN LI

slightly convex

describe the distal outline of the MN LI crown

slightly convex

5.3 8.8 12.6 [F/L: 5.7]

state the dimensions

describe the lingual surface of MN LI with respect to groves, ridges pits

surface is smooth; NO GROOVES, NO RIDGE,S NO PITS

key characteristic of central mandibular incisor:

symmetry

describe the lingual outline of the crown of the mandibular incisors

the cingulum is prominent in this view

describe the facial outline of the mandicular incisors crown

the crown is evenly convex in this view at the height of contour

for MN LI how does the tooth look on its axis

tilted distally; incisal edge goes more desial to distal bc there is arch form

bolton ratio

total distance of arch; if I straighten all teeth in an arch they may or may not be able to all fit in there together how much room we have in between all the teeth compared to in between all the maxillary?

from the lingual view where does the crown and root taper?

toward lingual

from a facial view, what is the shape of ALL anterior teeth?

trapezoidal

outline form of the crown of the mandibular central incisor is what shape?

trapezoidal

describe the crown shape for MN LI at distal view

triangular

from a mesial view describe the shape of the crown of mandibular incisors

triangular

from mesial view what is shape of MN LI?

triangular

what is shape of MN CI crown from distal view?

triangular

what is the MN CI root shape?

triangular

describe shape of root of MN LI

triangular; root tapers in apical 1/2