Translucency Parameter of CAD/CAM Restorative Materials
Objectives: To measure the Translucency Parameter (TP) of CAD/CAM ceramics. Methods: Zirconia [Origin Live HT(OZ), BruxZir(BZ)], resin ceramic [Lava Ultimate A2-HT(LU), Vita Enamic HT(EN)], resin composite [Filtek Supreme Ultra(A2-enamel, FS)], feldspathic ceramic [VITABLOCS Mark II(MII)], and lithium silicate [IPS e.max CAD A3.5-HT(EC), VITA SUPRINITY A2-HT(S)] were tested. Specimens (n=5) were square (12 x 12 mm) with a thickness of 1.0 mm ± 0.05 mm and 0.5 mm ± 0.05 mm (parallel faces). Each material was sintered, crystalized or cured using the manufacturer’s instructions. TP was calculated as the difference in L*a*b* readings of specimens recorded against white and black backgrounds in reflectance mode. The differences between the reflection values against the two backgrounds using a spectrophotometer were calculated at every 10 nm within the 360-750 nm range. Means and standard deviations were determined. The data were analyzed by analysis of variance. Fisher’s PLSD multiple comparison test was calculated at the 0.05 level of significance. Results: TP values are listed in the table. Conclusions: Zirconia was significantly more opaque than the other materials. Thickness affected translucency.
Financial support and/or materials proved by B&D Dental, Glidewell Laboratories and VITA.
Division: IADR/AADR/CADR General Session
Meeting:2015 IADR/AADR/CADR General Session (Boston, Massachusetts) Location: Boston, Massachusetts
Year: 2015 Final Presentation ID:3671 Abstract Category|Abstract Category(s):Dental Materials 11: Color and Appearance (Esthetics)
Authors
Yapp, Ron
( Dental Consultants, Inc.
, Ann Arbor
, Michigan
, United States
)
Aleksic, Aleksandar
( University of Texas Health Science Center
, Houston
, Texas
, United States
)
Paravina, Rade
( University of Texas Health Science Center
, Houston
, Texas
, United States
)
Bunek, Sabiha
( Dental Consultants, Inc.
, Ann Arbor
, Michigan
, United States
)
Powers, John
( Dental Consultants, Inc.
, Ann Arbor
, Michigan
, United States
)
Support Funding Agency/Grant Number: Financial support and/or materials proved by B&D Dental, Glidewell Laboratories and VITA.
Financial Interest Disclosure: NONE
SESSION INFORMATION
Poster Session
Color and Appearance (Esthetics) IV
Saturday,
03/14/2015
, 03:30PM - 04:45PM
TABLES
TP Values
Material Type
Code
TP@0.5 mm*
TP@1.0 mm*
Zirconia
OZ
10.3(0.4)a
7.7(0.1)d
BZ
10.5(0.3)a
7.5(0.1)d
Resin Ceramic
EN
21.1(1.0)c
14.9(0.3)e
LU
24.2(0.8)
16.8(0.3)f
Lithium Silicate
EC
21.9(1.8)b
15.7(0.3)
SP
21.6(0.7)bc
13.8(0.2)
Resin Composite
FS
23.5(1.0)
17.2(0.6)f
Feldspathic Ceramic
MII
19.6(0.2)
14.5(0.2)e
*Means with standard deviations in parentheses. Fisher’s PLSD intervals at the 0.05 level of significance for comparisons of means among products and between thicknesses were 0.6 and 0.3, respectively. Means with the same superscripted letters are statistically the same.