The Effect of pH Cycling on Surface Microhardness and Fluoride Release of Two Modified Nanoclay Glass Ionomer Restorations In Class V Cavities
Abdelaziz, M., Niazy, M., Taher, H. (2020). The Effect of pH Cycling on Surface Microhardness and Fluoride Release of Two Modified Nanoclay Glass Ionomer Restorations In Class V Cavities. EKB Journal Management System, 7(4-C), 511-520. doi: 10.21608/adjg.2020.13538.1163
Monaliza M. Abdelaziz; Maha A. Niazy; Hebaallah M. Taher. "The Effect of pH Cycling on Surface Microhardness and Fluoride Release of Two Modified Nanoclay Glass Ionomer Restorations In Class V Cavities". EKB Journal Management System, 7, 4-C, 2020, 511-520. doi: 10.21608/adjg.2020.13538.1163
Abdelaziz, M., Niazy, M., Taher, H. (2020). 'The Effect of pH Cycling on Surface Microhardness and Fluoride Release of Two Modified Nanoclay Glass Ionomer Restorations In Class V Cavities', EKB Journal Management System, 7(4-C), pp. 511-520. doi: 10.21608/adjg.2020.13538.1163
Abdelaziz, M., Niazy, M., Taher, H. The Effect of pH Cycling on Surface Microhardness and Fluoride Release of Two Modified Nanoclay Glass Ionomer Restorations In Class V Cavities. EKB Journal Management System, 2020; 7(4-C): 511-520. doi: 10.21608/adjg.2020.13538.1163

The Effect of pH Cycling on Surface Microhardness and Fluoride Release of Two Modified Nanoclay Glass Ionomer Restorations In Class V Cavities

Al-Azhar Dental Journal for Girls
Article 1, Volume 7, 4-C, October 2020, Page 511-520  XML PDF (534.71 K)
Document Type: Original Article
DOI: 10.21608/adjg.2020.13538.1163
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Authors
Monaliza M. Abdelaziz email orcid 1; Maha A. Niazy2; Hebaallah M. Taher3
1Assistant lecturer of Conservative Dentistry, Faculty of Dentistry, October 6 University, Cairo, Egypt
2Professor of Operative Dentistry, Faculty of Dental Medicine for Girls, AL-Azhar University, Cairo, Egypt
3Assistant Professor of Conservative Dentistry, Faculty of Dentistry, Cairo University, Cairo, Egypt
Abstract
Purpose: To assess the effect of pH cycling on surface microhardness and fluoride release of two modified nanoclay glass ionomer restorations (in vitro). Materials and Methods: A total of 180 permanent human caries free premolars were used. Class V were prepared on facial surfaces of the teeth. They were classified according to type of glass ionomer used for restoration of the cavities into three groups (60 teeth each); conventional glass ionomer medifill (A1), Dellite 43 modified glass ionomer (A2), and Dellite LVF modified glass ionomer (A3). Each group was moreover subdivided into three subgroups (20 teeth each) relative to the immersion solution used. The First subgroup remained in distilled Water (B1 control), the second subgroup was stored in artificial Saliva (B2) whereas the third subgroup was subjected to PH cycling (B3). Microhardness and fluoride release were measured after 7 and 30 days respectively. Results: There was a significant difference in the mean microhardness and fluoride release between the different materials after pH cycling (p≤0.001). PH cycling reduced the mean microhardness of the materials but induced the highest fluoride release. Conclusion: The proposed pH cycling model affected the microhardness of the tested materials while improved their fluoride release. Although the incorporation of montmorillonite into glass ionomer liquid improved the microhardness of the materials but it had yet, no effect on its fluoride release.
Keywords
Fluoride release; Glass Ionomer; Microhardness; Montmorillonite; Nanoclay
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