Discoloration of manually fabricated resins and industrially fabricated CAD/CAM blocks versus glass-ceramic: effect of storage media, duration, and subsequent polishing.

Abstract:

:This study determined the discoloration of five CAD/CAM resins, four manually polymerized resins, and glass-ceramic as control group. Specimens were divided into three groups (N=300, n=30) to be stored in coffee, black tea and red wine (n=10). The discoloration was measured using a spectrophotometer after 1, 7, 29, 90, 180 days storage. All tested groups showed color change (ΔE) at all time points. The manually polymerized resin composites GD (Gradia) and CM (CronMix K), and the CAD/CAM resin composite HC (Blanc High-class) showed significantly higher ΔE compared to all other groups in all tested media. The discoloration was extrinsic and decreased after polishing for the majority of the tested materials. Except CAD/CAM resin HC (Blanc High-class), all CAD/CAM resins showed similar color stability compared to the control group.

journal_name

Dent Mater J

journal_title

Dental materials journal

authors

Stawarczyk B,Sener B,Trottmann A,Roos M,Ozcan M,Hämmerle CH

doi

10.4012/dmj.2011-238

subject

Has Abstract

pub_date

2012-01-01 00:00:00

pages

377-83

issue

3

eissn

0287-4547

issn

1881-1361

pii

DN/JST.JSTAGE/dmj/2011-238

journal_volume

31

pub_type

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