REPAIR DURABILITY OF A WATER-AGED MICROFINE HYBRID RESTORATIVE RESIN COMPOSITE: A NANO-LEAKAGE STUDY | ||||
| Egyptian Dental Journal | ||||
| Article 10, Volume 67, Issue 1 - January (Conservative Dentistry and Endodontics), January 2021, Page 871-881 PDF (863.72 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/edj.2020.50498.1351 | ||||
 View on SCiNiTO | ||||
| Authors | ||||
Marwa El-Tahtawi  1; Ahmed Laithy2; Zainab Soliman 2; Farid El-Askary3
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| 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. | ||||
| Keywords | ||||
| Resin composite; Aging; Flowable composite; Durability; Nano-leakage | ||||
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