color & shade matching ppt.unlocked (1)
TRANSCRIPT
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(from Chu, SJ et al. Fundamentals of Color: Shade Matchingand Communication In Esthetic Dentistry. Quintessence !!"#
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Color and Shade Selection
Edmond R. Hewlett, D.D.S.
Esthetic Dentistry RT443c
UCLA School of DentistrySrin!, "##$
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%&er&iew
SeeColor science ' ercetion
Tooth otics
Ena(leThe
en&ironment
Comm)nicate*ita Shade +)ideshotos
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-hat is Color
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-hat is Color
Color is defined as the /)ality of an o(0ect
or s)(stance with resect to li!ht reflected(y it, )s)ally determined &is)ally (y
meas)rement of hue, chroma, and value.
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The 1)nsell Color System
rofessor A.H 1)nsell
2asic rinciles first )(lished in
#$
1)nsell Color ComanyEst. 5 to de&elo color standards
Contin)ed de&eloment at 6at7l. 2)rea) of
Standards, %tical Soc. of America
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The 1)nsell Color System
4#7s 8 Re&ised 1)nsell system standardi9ed
(y:
;nternational Commission on ;ll)mination
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The 1)nsell Color System
Color comonents:
H)e
Chroma
*al)e
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H)e
The color itself
The attri()te of acolor (y which we
distin!)ish red from
!reen, (l)e from
yellow, etc
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Chroma
The intensity of the
color
Low chroma >wea?@
Hi!h chroma
>hi!hly8sat)rated@
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*al)e
The (ri!htness of the
color
Hi!h &al)e (ri!hter
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*al)e
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1)nsell Color Sace
Arran!ement of allcolors accordin! h)e,
chroma, and &al)e in
a 38D sace
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%ther Color Terms
%acity
imenetra(le (y li!ht
refective8 neither transarent or
transl)cent
Transarencycaa(le of transmittin!
li!ht
Transl)cencydiff)sed transmission of li!ht
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Color ercetion
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Color ercetion
Similar colors aear different )nder
different conditions d)e to
Li!ht so)rce tye and an!)lationSi9e and shae differences
;nfl)ence of (ac?!ro)nd color ' li!htin!
ercetion an!le
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eye
ercetion
en&ironment o(0ect s)rface
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eye
ercetion
en&ironment o(0ect s)rface
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The H)man Eye
Recetors: rods and cones
Rods con&ey shades of !ray
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The H)man Eye
Color(lindness affects
8in83## females
8in83
males
+et tested
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;ll)mination
E&erythin! that we see is refected light
Full spectrumli!ht is needed to see color
Color missin! in the li!ht so)rce cannot (ereflected
;ma!e from Ch), et al "##4E. Hewlett, DDS
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;ll)mination So)rces
Dayli!ht
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;ll)mination So)rces
Recommended li!htin! for acc)rate shade
ta?in! in dentistry:
$$## FRelicates northern nat)ral midday
dayli!ht
(alances all h)es in the sectral c)r&e
-or?in! distance: " to $ inchesArm7s len!th
Aroriate en&ironment
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Color corrected so)rce
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;ll)mination
Use the aroriate ill)mination so)rceB
incandescent fuorescent
5,500 K
ima!es from Ch), et al "##4E. Hewlett, DDS
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1etamerism
%(0ects that aear similar )nder one
condition ()t different )nder another.
i.e., an o(0ect aears to (e differentcolors when &iewed )nder different li!ht
so)rces
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Color corrected so)rce
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1etameric air
$,$## F l)orescent ;ncandescent
Tooth I5 8 )nrestored
Tooth I 8 crown
ima!es from Ch), et al "##4E. Hewlett, DDS
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1etamerism
Easy to reco!ni9e, imossi(le to control
6ewer materials hel
chameleon effectJ fl)orescence
1ay need to eGlain to atient
or dental ceramics:
1ore oa/)e orcelain
more
metamerismB
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Fey %tical roerties of Teeth
l)orescence
%alescence
Transl)cency
ima!es from Ch), et al "##4E. Hewlett, DDS
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l)orescence
Emission of &isi(le li!ht )on eGos)re to
fl)orescent li!ht
Dentin KK Enamel
ima!es from Ch), et al "##4E. Hewlett, DDS
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l)orescence
Emission of &isi(le li!ht )on eGos)re to
fl)orescent li!ht
Dentin KK Enamel%aceo)s dentin orcelains
Dentin8li?e fl)orescence
Reduced metameric eect
ima!es from Ch), et al "##4E. Hewlett, DDS
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%alescence
A(ility of a translucentmaterial to
aear (l)e in reflected li!ht
aear red8oran!e in reflected li!ht
ima!es from Ch), et al "##4E. Hewlett, DDS
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%alescence
Under direct ill)mination
reflectance of short wa&elen!ths
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%alescence
Under transill)mination
reflectance of lon! wa&elen!ths
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%alescence
Enamel KK Dentin
more transl)cent, more
crystalline
;ncisal orcelainsCan mimic enamel oalescence
ima!es from Ch), et al "##4E. Hewlett, DDS
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Transl)cency
Transmission and diff)sion of li!ht
Con&eys deth
and &itality
ima!e from Ch), et al "##4E. Hewlett, DDS
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Transl)cency
A&oid eGcessi&e transl)cency
lowers &al)e
restoration is too!reydar?
ima!e from Ch), et al "##4E. Hewlett, DDS
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Transl)cency
A&oid inade/)ate transl)cency
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Control the En&ironment
1)st s)rro)nd teeth with color that aids
color ercetion
Use ne)tral colors in oeratoryClose (linds
window li!ht dayli!ht
contamination
Co&er (ri!htly8colored clothin!
6o listic?BE. Hewlett, DDS
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Control the En&ironment
Always )se a (i(
Color sace of nat)ral teeth %ran!e
Comliment to oran!e is (l)eUse blueatient (i(s
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Shade Determination
Shade Comm)nication
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*ita Shade +)ide
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*ita Shade +)ide
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Shade Selection w *itaan Classical
. Select h)e first ".
70% will be A
"#N will (e D
#N will (e 2 or C
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*ita 3D81aster Shade +)ide
;ntrod)ced in 5
Reflects distri()tion
of tooth shades in
nat)re
Systematic and equi-distantco&era!e of
the nat)ral toothshade sectr)m
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*ita 3D81aster Shade +)ide
Desi!n:
$ &al)ele&els
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*ita 3D81aster Shade +)ide
Desi!n:
3O chromale&els
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*ita 3D81aster Shade +)ide
Desi!n:
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*ita 3D81aster Shade +)ide
roced)re
. Select &al)e
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*ita 3D81aster Shade +)ide
roced)re
. Select &al)e
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*ita 3D81aster Shade +)ide
roced)re
. Select &al)e
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*ita 3D81aster Shade +)ide
roced)re
". Select chromafrom
within the selected
&al)e !ro) Use >1@ ta(s from
the selected &al)e
!ro)
Choosin! (etweendil)ted ' sat)rated
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*ita 3D81aster Shade +)ide
roced)re
3. Select h)efrom
within the selected
&al)e !ro) ;s the nat)ral tooth
more reddish
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*ita 3D81aster Shade +)ide
2leached shades nowa&aila(le
#1, #1", #13
2leached shadesocc)y the >leftmost@
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Sh d S l ti F
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Shade Selection Feys
Use correct en&ironment and li!htin!
Select shade at (e!innin! of a7t.
atient sittin! )ri!ht*iewin! distance P$ in. from teeth
atient7s teethdentist7s eyes at same le&el
E. Hewlett, DDS
Sh d S l ti F
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Shade Selection Feys
hoto!rah shade ta(s which match
secific se!ments of teeth
hoto!rah teGt)re6ote secial characteristics
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Sh d S l ti F
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Shade Selection Feys
Loo? for &ariance (etween !in!i&al,
middle, and incisal thirds of teeth.
hi!her chroma ' oacity
less chroma, hi!her &al)e
hi!h transl)cency,lower &al)e
ima!e from Ch), et al "##4 E. Hewlett, DDS
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hoto!rahs for La(Comm)nication
E. Hewlett, DDS
T t h t h
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TeGt)re hoto!rah
Close8) of anteriors with lens to la(ial
s)rface
Emhasi9es s)rface teGt)re and l)ster
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C l h t h
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Color hoto!rah
Close8) of anteriors with lens an!led $8
"#Q to la(ial s)rface
Reflections (o)nce away from camera,
re&ealin! color and characteri9ation
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hoto!rahs with Shade Ta(s
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hoto!rahs with Shade Ta(s
An!le camera to a&oid reflections from ta(
and teeth
Show at least 85 teethTa( at same an!le as teeth
Ta( as close to teeth as ossi(le
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hoto!rahs with Shade Ta(s
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hoto!rahs with Shade Ta(s
Ta( and handle clearly &isi(le, no
reflections
Shoot as many hotos as necessary
different ta(s for different areas of teeth
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hotos for All Ceramic Restorations
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hotos for All8Ceramic Restorations
Shade ta( w teeth (efore rearation
Shade ta( w reared toothteeth
Desired shade
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%ther La( Comm)nication hotos
hotos of ro&isionals
*iews $, , , ' 5 as
indicatedShade hoto of ro&isionals;f restoration doesn7t match, hoto!rah it
in mo)th with ta(s
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Di!ital Shade Ta?in! De&ices
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Di!ital Shade8Ta?in! De&ices
ima!es from Ch), et al "##4E. Hewlett, DDS
Di!ital Shade Ta?in! De&ices
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Di!ital Shade8Ta?in! De&ices
-hat are they
R+2 de&ices, sectrohotometers, orcolorimeters desi!ned or modified for dental
)se
ima!es from Ch), et al "##4E. Hewlett, DDS
Di!ital Shade Ta?in! De&ices
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Di!ital Shade8Ta?in! De&ices
-hat can they do
ro&ide detailed data on shades in different
9ones of a tooth7s s)rface
ima!es from Ch), et al "##4E. Hewlett, DDS
Di!ital Shade8Ta?in! De&ices
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Di!ital Shade8Ta?in! De&ices
Limitations
6ot relia(le for comleG characteristics
s)(8s)rface color
Transl)cency
TeGt)re effects
ima!e from Ch), et al "##4E. Hewlett, DDS
Di!ital Shade8Ta?in! De&ices
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Di!ital Shade8Ta?in! De&ices
2ottom Line
6%T a relacement for traditional methods
2est )sed as an ADU6CT to traditional
methods and hoto!rahy
+ +
ima!es from Ch), et al "##4E. Hewlett, DDS