Effect of two surface treatments and aging on color stability of repaired hybrid ceramic
At a Glance
Section titled āAt a Glanceā| Metadata | Details |
|---|---|
| Publication Date | 2022-04-01 |
| Journal | Egyptian Dental Journal /Egyptian Dental Journal |
| Authors | Ghada Tokhy, Tarek Salah, Fatma Mohamed |
| Institutions | Ain Shams University |
| Citations | 2 |
Abstract
Section titled āAbstractāSTATEMENT OF PROBLEM: However, the repair of fractured ceramic restoration is the most reasonable and practical alternative treatment, the repair is a challenging clinical situation because after repair the color of the restoration may change as it ages under various physical and chemical conditions. Objective:The aim of the present study was to evaluate the effect of two surface treatments and ageing on the color stability of hybrid ceramic repaired with resin composite. Materials and Methods:The specified vita enamic ceramic blocks (14*14 mm) were sliced into discs with constant thickness of 1mm using a low speed; high precision Isomet diamond saw 4000 **** .Before repair, and specimens were aged for one month at 37 Ā°C in a water bath.Specimens were divided into two equal groups Aaccording to surface treatment, the first group (n=8) treated by 9% HF followed by application of silane coupling agent and universal bond and second group (n=8) treated by 9%HF followed by application of universal bond.Repair was performed by packing the composite repair material using a Split Teflon mold (1mm thickness) placed on treated the hybrid ceramic samples.After repair, the samples were thermocycled (5000 cycles: 5-55Ā°C; cyclic).The repaired samples were immersed in coffee solution under the controlled temperature 37Ā°C.Color stability was measured by VÄ°TA Easy shade Compact.Results: There was significant difference in color stability for repaired samples before and after aging and staining.The color changes of repaired samples in all groups were above the clinically acceptable value (ĪE ā„3.3). Conclusion:Based on the type of composite used in present study, there was perceptible color change in the repaired samples.