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| 2010-22 |
| 22-1 |
ISSN (Print) 1013-9052
EISSN 1658-3558
The Saudi Dental Journal,
P.O. Box 52500,
Riyadh 11563,
Kingdom of Saudi Arabia
P.O. Box 52500,
Riyadh 11563,
Kingdom of Saudi Arabia
| Tel. |
966-1-467-7328 |
| Fax. |
933-1-467-7308 / 966-1-467-7534 |
| Email |
saudidj@ksu.edu.sa |
|
Fouad S. Salama, BDS, MS, DABPD, FAAPD
Surface roughness of restorative materials contributes to plaque adhesion and surface discoloration of esthetic restorations. The purpose of this In vitro Investigation was to measure the effect of home-use bleaching agents on surface texture and roughness of a conventional glass Ionomer (Ketac-FII) and a compomer (Dyrad® AP} restorative material. Twenty-four flat cylindrical specimens of each material were prepared uslngTeflon molds. Specimens of each material were divided into three groups of 8 each. Groups 1 and I served as controls (no bleaching agents). Groups 3 and 4 were treated with 3 applications of Pearl Drops* on Ketac-Fil and Dyract® AP respectively. Groups S and 6 were treated with 3 applications of Natural While® on Ketac-Fil and Dyract® AP respectively. Before testing surface roughness, an impression was taken of each specimen to form a replica. All replicas were then prepared for SEM examination. Surface roughness (Ra value) was evaluated using a surface roughness analyzer. Statistical analysis was done using a non-parametric one-way analysis of variance {Kruskal-Wallts test) with a Tukeys post hoc test. Results showed highly significant differences among the six groups (cKO.0001). Group 4 {Pearl Drops® applied to Dyrad® AP) demonstrated the lowest Ra value compared with all other groups (a<0.001). Groups (Natural White® applied to Ketac-FII) demonstrated the highest Ra value compared with all other groups (a<0.0001). Dyract®AP was slgnificantly smoother than Ketac-Fil for all treatments with a <0.0001, SEM evaluation revealed different degrees of surface texture. It was concluded that Dyrad® AP and Ketac-Fil showed significant differences in surface roughness and texture before ahdafter application of Pearl Drops® and Natural White® home-use bleaching agents.
Saudi Dental Journal 2001;13(2):66-70.
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