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Glossary of Height of contours

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height of contour
how far the crown overhangs the cervical line (only on facial and lingual)
emergence profile
the cervial line of the height of contour is FLAT!
height of contour on maxillary anteriors
facial-cervial third 1/2 mm

lingual-cervial third 1/2mm
Where are all facial height of contours?
in cervial third
mandibular anterior height of contour
facial is in cervical third and is less than 1/2 mm

lingual is in cervial third and is less than 1/2 mm
What happens if Dr. makes crown with an emergence profile that is not flat?
inflam
functions of proximal contacts and embrasures
1. prevent food impaction
2. protect peridontium
3. stabilize dental arch
4. allow food to excape the occlusal surface
5. distribute forces
what is bigger gingival or incisal embrasure?
always gingival
describe embrasures as you go from ant to post teeth
as go to posterior gingival embrasure gets smaller and incisal get larger (but gingival always bigger)
embrasure of ant teeth
since proximal contact is in incisal third, there is a huge gingival embrasure and a v. small incisal embrasure
describe proximal surface to proximal contact
always flat or concave on all teeth for embrasure
compare facial and lingual embrasures
equal or lingual slightly larger
where are proximal contacts in line with?
facial cusp
what tooth has mesial concavity?
mesial concavity on first premolar needed bc canine is not the same shape
descibe facial/lingual embrasures from ant to post teeth
facial embrasures increase and lingual embrasures decrease as go posteriorly
mandibular anterior proximal contacts
in incisal third
what happens if mandibular anterior teeth get too much wear
insical embrasures disappear
canine proximal contacts
mesial PC in incisal third

distal PC in middle third

this causes occlusal embrasures to get larger and gingival to get smaller as come posteriorly
what happens to embrasure as proximal contacts become more gingival (like in post teeth)
gingival embrasures get smaller and occlusal embrasures get bigger
posterior embrasures vs. ant embrasures
posterior teeth have a smaller facial embrasure bc contacts are more facial and a larger occlual embrasure
max width of arch
1st molar
what teeth of equal facial and lingual embrasures?
mandibular incisors
% of max lateral incisor that should be seen in smile
70%
how much shorter should max lateral incisor be that central?
1 mm
what gives smile youthful appearance
incisal embrasure
why do caries spread rapidly in children?
thinner enamel and dentin and their dentin is less dense
describe primary dentition
thinner enamel and dentin

dentin less dense so whiter teeth

larger pulps and taller pulp horns

longer roots in relation to crown size

roots v. flared
why do primary teeth have flared roots?
bc perm tooth bud sits in that space
primary tooth crown
more bulbous appearance of crown due to small occlusal table and constricted CEJ. HUGE HEIGHT OF CONTOUR
primary first molars
have distinctive mesial facial bulge. looks way different
what do primary second molars look like?
clones of permanet first molars
function of primary teeth
space maintainers so when first pre molars erupt they hold arch so man. molars can come in

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