El-Tahtawi, M., Laithy, A., Soliman, Z., El-Askary, F. (2021). REPAIR DURABILITY OF A WATER-AGED MICROFINE HYBRID RESTORATIVE RESIN COMPOSITE: A NANO-LEAKAGE STUDY. Egyptian Dental Journal, 67(Issue 1 - January (Conservative Dentistry and Endodontics)), 871-881. doi: 10.21608/edj.2020.50498.1351
Marwa El-Tahtawi; Ahmed Laithy; Zainab Soliman; Farid El-Askary. "REPAIR DURABILITY OF A WATER-AGED MICROFINE HYBRID RESTORATIVE RESIN COMPOSITE: A NANO-LEAKAGE STUDY". Egyptian Dental Journal, 67, Issue 1 - January (Conservative Dentistry and Endodontics), 2021, 871-881. doi: 10.21608/edj.2020.50498.1351
El-Tahtawi, M., Laithy, A., Soliman, Z., El-Askary, F. (2021). 'REPAIR DURABILITY OF A WATER-AGED MICROFINE HYBRID RESTORATIVE RESIN COMPOSITE: A NANO-LEAKAGE STUDY', Egyptian Dental Journal, 67(Issue 1 - January (Conservative Dentistry and Endodontics)), pp. 871-881. doi: 10.21608/edj.2020.50498.1351
El-Tahtawi, M., Laithy, A., Soliman, Z., El-Askary, F. REPAIR DURABILITY OF A WATER-AGED MICROFINE HYBRID RESTORATIVE RESIN COMPOSITE: A NANO-LEAKAGE STUDY. Egyptian Dental Journal, 2021; 67(Issue 1 - January (Conservative Dentistry and Endodontics)): 871-881. doi: 10.21608/edj.2020.50498.1351
REPAIR DURABILITY OF A WATER-AGED MICROFINE HYBRID RESTORATIVE RESIN COMPOSITE: A NANO-LEAKAGE STUDY
1Master Degree Student, Operative Dentistry Department, Faculty of Dentistry, Ain Shams University.
2Lecturer, Operative Dentistry Department, Faculty of Dentistry, Ain Shams University.
3Professor, Operative Dentistry Department, Faculty of Dentistry, Ain Shams University
Abstract
To evaluate the effect of two types of flowable composites and storage time on nano-leakage of repaired water aged resin composite. In total, 30 resin composite discs were prepared and stored in distilled water for 6 m. The discs were divided into 6 groups (n=5/group) according to the two experimental factors: Factor 1: Flowable composite, 3 groups (no-flowable, high-viscosity and low-viscosity flowable composites), and Factor 2; Storage time after repair, 2 groups (24 h and 6 m). Repair procedures were carried out using universal adhesive with and without the application of the flowable composite. After repair, half of the specimens were stored for 24 h and the other half were stored for 6 m in distilled water. After storage, each disc was sectioned into 2 halves and each half was prepared for silver nitrate staining to evaluate nano-leakage under SEM. Three photomicrographs were taken for each half-slab (30 photomicrographs/group) then analyzed using ImageJ software. Data were evaluated using Kruskal-Wallis/Mann-Whitney test (P=0.05). Flowable composite had no significant effect on nano-leakage (P=0.129), while storage time showed a statistically significant effect of nano-leakage (P˂0.0001). There was no statistically significant difference regarding the use of flowable resin composite either at 24 h and 6 m storage times (P˃0.05). There was a statistically significant difference between 24 h and 6 m storage periods for all experimental variables (P˂0.05). The two types of flowable composites were not able to prevent the uptake of silver nitrate at the composite/composite interface either after 24 h or 6 m.
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