8 of final Flashcards
labiolingual alignment, mesiodistal alighnment, vertical position
factors and forces that determine the tooth position
tooth position based on
1
2
3
- muscles (cheeks, lips, and tongue)
- genetic (size and shape of arch and teeth-> available sace)
- habits
the relationship of the teeth to each other within the dental arch
intra-arch tooth alighment
plane that curves to fit the occlusal surfaces and incisal edges of all the teeth:
is this flat?
plane of occlusion
no NOT flat
concave:
convex:
concave: mand
convex: max
determined by the long axis of the tooth (crown and root)
angulation of the teeth
angulation of mand teeth sagittal plane explain:
anterior teeth= labially inclined 20 degrees
premolars= mesially inclined 6 degrees
molars= mesially inclined (10-15 degrees)
angulation of max teeth sagittal plane explain:
anterior teeth=labially inclined (CI most at 28 degrees)
premolars= mesially inclined 9 degrees
molars= mesially inclined 12 degrees
angulation of mand teeth frontal plane explain:
anterior teeth= vertical inclined 0
premolars= 1st= labial inclined 9
2nd= lingual inclined 9
molars= lingual inclined 20
angulation of max teeth frontal plane explain:
anterior= incisors= distal
canines= mesial
premolars= slight buccal
molars= buccal
antero-posterior curvature of occlusal plane
curve of spee
medio-lateral curve of occlusal plane
curve of wilson
when posterior teeth occlude, they are loaded
axially
what are designed to take heavy lodas, support the occlusal vertical dimension
posterior teeth
when anterior teeth occlude, they ________ through their long axis
are NOT loaded through they long axis (guiding excursive movements)
what are not designed for loading
anterior teeth
the occlusal table is the area defined by the _____and the mesial and distal ____
cusp tips and the M/D cusp ridges/arms
occlusal table is ____% of the buccolungual width of the tooth. facilitates axial loading
50-60
(occlusal table) inclines inside the buccal and lingual cusp ridges
inner inclines
(occlusal table) inclines outside the buccal and lingual cusp ridges
outer inclines
the relationship of the teeth in one arch to those in the other arch
inter-arch tooth alighment
supporting/centric/functional/stamp cusps:
L cusps of max and B cusps of mand
guiding/non-centric/balancing/shearing cusps
B cusps of max and L cusps of mand
imaginary line drawn thru buccal cusp tups of mand teeth
BO line