| Autor: |
Kahnamouei, Mahdi Abed, Gholizadeh, Sarah, Rikhtegaran, Sahand, Daneshpooy, Mehdi, Kimyai, Soodabeh, Oskoee, Parnian Alizadeh, Rezaei, Yashar |
| Předmět: |
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| Zdroj: |
Journal of Dental Research, Dental Clinics, Dental Prospects; Autumn2017, Vol. 11 Issue 4, p222-228, 7p |
| Abstrakt: |
Background. The aim of this study was to investigate the effect of preheating methacrylate- and silorane-based composite resins on their color stability up to 40 times at 55-60°C. Methods. Seventy-six methacrylate and silorane-based composite resin samples, with a diameter of 10 mm and a height of 2 mm, were divided into 4 groups (n=19). After the samples were prepared, their color parameters were determined using a reflective spectrophotometer. The composite resin samples were separately stored in a solution of tea for 40 consecutive days. Then the samples underwent a color determination procedure again using a spectrophotometer and color changes were recorded. Finally two-way ANOVA was used to study the effect of composite temperature on its staining (P<0.05). Independent- samples t-test was used to evaluate changes in conversion rates of preheated composite resin samples compared to non-heated samples at P=0.005 and P=0.029 for silorane-based and Z250 composite resin samples, respectively. Results. Both composite resin type (P=0.014) and preheating (P<0.001) had significant effects on ÄE. Conclusion. Repeated preheating of methacrylate- and silorane-based composite resin samples, up to 55-60°C for 40 rounds, resulted in more color changes compared with unheated composite resin samples. After storage in a solution of tea the color change rate in the composite resin samples of silorane-based was higher than the Z250 composite resin samples. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
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