Kusai Baroudi1, Rasha Said Mahmoud2, Bassel Tarakji3, Mohammed Alsakran Altamimi4. 1. Faculty, Department of Restorative Dental Sciences, Al-Farabi College of Dentistry, Riyadh, Saudi Arabia/Department of Pediatric Dentistry, School of Dentistry, Al-Baath University , Syria . 2. Faculty, Department of restorative dental Sciences, Al-Farabi College of Dentistry , Riyadh, Saudi Arabia . 3. Faculty, Department of Oral Dignosis, Al-Farabi College of Dentistry , Riyadh, Saudi Arabia . 4. Faculty, Department of Restorative Dental Sciences, Al-Farabi College of Dentistry , Riyadh, Saudi Arabia .
Abstract
INTRODUCTION: This study was designed to assess the effect of two bleaching agents on the disintegration tendency of three types of glass ionomers. MATERIALS AND METHODS: A total of 90 specimens were prepared by using a split Teflon ring with an internal diameter of 5 mm and a thickness of 2 mm. The tested materials were applied and bleached according to manufacturer's instructions. Dissolution measurements were made by calculating weight loss through different periods of the test; (one week, one month and three months) and they were analyzed by using one-way analysis of variance (ANOVA), followed by Tukey's post-hoc test. RESULTS: All glass ionomer materials exhibited a degree of dissolution. Opalescence Xtra increased the dissolution of Photac Fil and F2000 significantly, while Opalescence Quick had no effect on dissolution of glass ionomer restoratives. CONCLUSION: Bleaching effect on dissolution of glass ionomers is material and time dependant. Care should be taken by clinicians When bleaching teeth that are restored by glass ionomer, because this dissolution may affect the physical properties of these restorations.
INTRODUCTION: This study was designed to assess the effect of two bleaching agents on the disintegration tendency of three types of glass ionomers. MATERIALS AND METHODS: A total of 90 specimens were prepared by using a split Teflon ring with an internal diameter of 5 mm and a thickness of 2 mm. The tested materials were applied and bleached according to manufacturer's instructions. Dissolution measurements were made by calculating weight loss through different periods of the test; (one week, one month and three months) and they were analyzed by using one-way analysis of variance (ANOVA), followed by Tukey's post-hoc test. RESULTS: All glass ionomer materials exhibited a degree of dissolution. Opalescence Xtra increased the dissolution of Photac Fil and F2000 significantly, while Opalescence Quick had no effect on dissolution of glass ionomer restoratives. CONCLUSION: Bleaching effect on dissolution of glass ionomers is material and time dependant. Care should be taken by clinicians When bleaching teeth that are restored by glass ionomer, because this dissolution may affect the physical properties of these restorations.
Authors: Jimmy Londono; Amara Abreu; Steve Nelson; Jorge Hernandez; Carlos Torres; Donald Mettenburg; Stephen Looney; Frederick Rueggeberg Journal: J Prosthet Dent Date: 2009-09 Impact factor: 3.426