| dc.description.abstract | Shade matching in tooth restoration can be done with two methods, visual method using
shade guide and instrumental method using colorimeter or spectrophotometer, both of
this methods posses disadvantages that can cause bias in the shade matching result,
therefore a new method using digital photography was proposed. The camera that is
generally used in digital photography is DSLR camera, but this camera has drawbacks,
such as the size of the camera which is large and heavy making it difficult to operate.
Other types of digital cameras that are growing rapidly nowadays are mirrorless (MS)
and smart phone (SP). These two cameras are smaller, lighter, and easier to operate.
Due to various parameters that must be standardized in digital photography method,
achieving a consistent and adequate photograph is difficult, therefore a color
calibration method is needed before shade matching are carried out. The color
calibration method that can be used in digital photography method is by using crosspolarization
filter (CPF) with and without grey card (GC). The purpose of this study
was to determine the effect of mirrorless and smart phone camera with color calibration
method using CPF with and without GC on the accuracy of shade matching using
digital photography. The research sample was 9 tabs from N-D shade guide. The
sample was photographed using a DSLR camera with CPF and GC as the color
calibration method, the shade tabs L*a*b* was measured using computer software. The
sample group was divided into four groups; Group A (MS+CPF+GC), group B
(MS+CPF), group C (SP+CPF+GC), group D (SP+CPF). The value of shade matching
accuracy (ΔE) was obtained by comparing the L*a*b* value from the control group
with the sample group. The effect of camera type and color calibration method was
tested using paired T-test. The result showed that the most accurate color method was
group C (1,75+0,30) and the least accurate was group D (27,03+1,19). Paired T-test
result showed that there is an effect of MS and SP camera type with color calibration
method using CPF and GC on the shade matching accuracy using digital photography
with p value p=0,008 (P<0,05), there is an effect of the MS and SP camera type with
color calibration method using CPF without GC on the shade matching accuracy using
digital photography with p value p=0,0001 (P<0,05). There is an effect of the color
calibration method using CPF with and without GC using MS camera on the shade
matching accuracy using digital photography with p value p=0,0001 (P<0,05). There
is an effect of the color calibration method using CPF with and without GC using a SP
camera on the shade matching accuracy using digital photography with p value
p=0,0001 (P<0,05). The best shade matching methods was SP+CPF+GC, The shade
matching accuracy of MS+CPF+GC is clinically acceptable, therefore it is also
recommended for clinical shade matching procedure. | en_US |
