INFLUENCE OF FILLER CHARGE ON GLOSS OF COMPOSITE MATERIALS BEFORE AND AFTER IN VITRO TOOTHBRUSHING
Available online 3 May 2013
Abstract
Objectives
this
study evaluated the gloss behavior of experimental resin composites
loaded with different filler percentages, immediately after polishing
and after toothbrushing simulation.
Methods
sixteen
disc-shaped specimens were fabricated for each different-charged
composite (40%, 50%, 60%, 70% and 75%) and polished with SiC abrasive
papers. Gloss measurements were made prior to simulated toothbrushing.
The specimens were subjected to the simulation for 5, 15, 30 and
60 minutes using an electrical toothbrush with a standardized pressure
while being immersed in a toothpaste/artificial saliva slurry.
Results
Baseline
composite gloss values ranged from 69.7 (40%) to 81.3 (75%) GU (gloss
units) and from 18.1 (40%) to 32.3 (75%) GU after one hour of brushing.
Highest gloss values were obtained by 75%-charged resin, while the
lowest values were obtained by the 40%-charged one.
Conclusions
All
tested materials showed a gloss decrease. However, the higher filler
load a composite resin has, the higher gloss it can achieve.
Comments