class IV stuff Flashcards
(60 cards)
what needs to match in tooth restorations
Shape
Surface texture
Color
Translucency
distal outline of central incisors shape
Slightly convex
more rounded on the mesial
distoincisal angle shape vs mesial of central incisors
distoincisal is more rounded
location of the crest of curvature of central incisors
in the incisal 1/3 close to the junction of the incisal and middle 1/3
what is the mesial outline of a central incisor
slightly convex to striatght
where is the crest of curvature of central incisors
in the incisal 3rd near the mesioincial angle
shape of the mesioincisal angle in central incisors
Sharp
are central incisors flat
No, 3 lobes with 2 concavities
should class 4 preps be preped ideally
No, should copy the opositng teeth
process of getting the shape of a tooth for class 4
follow outline
primary anatomy: line angles
secondary anatomy: surface changes in the tooth
tertiary anatomy: not smooth, but have perinkema
how do we determine the color of the teeth
Vita classic shade guide
3 dimensiosn of color
Hue
Chroma
Value
chroma
saturation/purity of color
Hue
color tone
Value
high value is light
low value is dark
hue for dentist
Color category of the dentinal body
Chroma for the dentist
Color saturation of the dentinal body
VAlue for the dentist
The degree of whiteness of enamel
A in shade guide
Red-brown
B in shade guide
Red-yellow
C in shade guide
greyish
D in shade guide
Red-grey
when shoudl shade matching be done
Before the teeth are exposed to dehydration
what happens to teeth when dehydrated
become lighter and does not return for 30 minutes of rehydration
