Objectives: To measure the gloss (GU, gloss units) of CAD/CAM ceramics. Methods: Zirconia [BruxZir(BZ), Lava Plus(LP), Nacera Pearl(NP), NexxZr-T(NT), Zenostar Zr(ZZ), NexxZir Smile(NS)]; resin ceramics [CeraSmart(CS), Lava Ultimate(LU)]; and lithium disilicate [IPS e.max CAD(EC)] were tested. Specimens (n=5) were square (12 x 12 mm) with a thickness of 1.0 mm ± 0.05 mm (parallel faces). Each material was sintered using the heating and cooling profile recommended by the manufacturer. Before polishing, each specimen was sandblasted for 20 seconds over the entire surface with a sandblaster with a silica-modified aluminum oxide at an air pressure from 0.55-0.70 MPa. Specimens were polished using Dialite ZR/LD kits (P1) and Luster Zirconia/e.max kits (P2) with a lab motor and electrical hand piece at 12-15,000 rpm with medium hand pressure. Measurements (GU) were obtained using a gloss-meter (Novo-Curve). Means and standard deviations were determined. Data were analyzed by ANOVA and Fisher’s PLSD test at the 0.05 level of significance. Results: Gloss values (GU) are listed (Table 1). Conclusions: Gloss produced by P1 and P2 of among zirconia products was similar with a few exceptions. Polished zirconia specimens had a higher gloss than the resin ceramics and lithium disilicate ceramic.
Division: IADR/AADR/CADR General Session
Meeting:2015 IADR/AADR/CADR General Session (Boston, Massachusetts) Location: Boston, Massachusetts
Year: 2015 Final Presentation ID:0641 Abstract Category|Abstract Category(s):Dental Materials 11: Color and Appearance (Esthetics)
Authors
Garcia, Marcos
( University of Texas School of Dentistry at Houston
, Houston
, Texas
, United States
)
Frey, Gary
( University of Texas School of Dentistry at Houston
, Houston
, Texas
, United States
)
Yapp, Ron
( Dental Consultants
, Ann Arbor
, Michigan
, United States
)
Powers, John
( Dental Consultants
, Ann Arbor
, Michigan
, United States
)
Paravina, Rade
( University of Texas School of Dentistry at Houston
, Houston
, Texas
, United States
)
Financial Interest Disclosure: none
SESSION INFORMATION
Poster Session
Color and Appearance (Esthetics) I
Thursday,
03/12/2015
, 02:00PM - 03:15PM
TABLES
Gloss Value Results (GU)
Material Type
Code
P1
P2
Zirconia
BZ
164(11)
142(14)d
LP
137(6)c
147(11)de
ZZ
143(21)c
153(12)e
NP
138(4)c
148(12)de
NT
146(15)ac
145(7)ade
NS
144(14)bc
140(15)bd
Resin Ceramics
CS
35(11)
56(6)f
LU
56(7)
68(4)g
Lithium Disilicate
EC
71(9)
61(9)fg
Means with standard deviations in parentheses. Fisher’s PLSD intervals at the 0.05 level of significance for comparisons of means between polishers and among products were 4 and 10 GU, respectively. Means with the same superscripted letters are statistically the same.