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| Year : 2006 | Volume
: 9
| Issue : 2 | Page : 63-71 |
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Thermal cyclic changes on water sorption and solubility of composite restoratives - An in-vitro study
Aduma Meena Reddy, Dhanya Kumar, Vasundhara Shivanna
Department of Conservative Dentistry and Endodontics, College of Dental Sciences, Davangere 577004, India
Correspondence Address:
Aduma Meena Reddy
Department of Conservative Dentistry and Endodontics, College of Dental Sciences, Davangere 577004
India
 Source of Support: None, Conflict of Interest: None  | Check |
DOI: 10.4103/0972-0707.42360
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Background & Objectives : The aim of the study was to evaluate the effect of thermal cycling on water sorption and solubility of three commercially available composites namely Microfilled (Filtek A110), Hybrid (Z- 100) and Packable (Filtek P-60).
Methodology: Thirty disc specimens of dimension 10 1 mm diameter and I ± 0.1 mm thickness were made using each group of composite and randomly divided into three sub groups. All the specimens were subjected to conditioning in a incubator maintained at 35 ± I °C for 24 hours until a constant mass was achieved and the weight checked using an electronic analytical balance (m,). The subgroups were treated as follows ; Subgroup 1 : Stored in distilled water at 178 hours; Subgroup 2 : stored in distilled water at 35°C for 173 hours and subjected to five hours of thermal cycling with an upper temperature of 60°C. Subgroup 3 : stored in distilled water at 35°C for 173 hours and subjected to five hours of thermal cycling with an upper temperature of 60°C. Mass after treatment were measured anti recorded as m2 and specimens were re-conditioned to constant mass m3. The volume of the specimens was obtained and water sorption and solubility calculated. Data was analysed using factorial ANOVA/ Mann-Whitney test at significance level of 0.05.
Results: Results have shown that highest water sorption was seen for Group B i.e. Z-100 and least for Group C i.e. Filtek P-60. the highest solubility was seen for Group A i.e. Filtek A-1 10 and least for Filtek P-60).
Interpretations and Conclusions: Conclusions from the study can he drawn as the effect of thermal cycling on water sorption and solubility of composite resins was material dependent. A significant increase in water sorption was observed for Filtek-A-110 and Z-100 with thermal cycling whereas solubility was not effected with thermal cycling. |
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