Impact Of Simulated Gastric Acid On Color Stability Of Different Types Of Dental Ceramics | ||||
| Egyptian Dental Journal | ||||
| Article 26, Volume 68, Issue 2 - Serial Number 4, April 2022, Page 1767-1773 PDF (386.09 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/edj.2022.125679.2009 | ||||
 View on SCiNiTO | ||||
| Authors | ||||
moaz eltorky1; mahmoud shakal2; Waleed Elshahawy  3
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| 1Assistant Lecturer of Fixed Prosthodontics, Faculty of Dentistry, Tanta University | ||||
| 2Professor of Fixed Prosthodontics, Faculty of Dentistry Tanta University | ||||
| 3Assistant Professor of Fixed Prosthodontics, Faculty of Dentistry, Tanta University | ||||
| Abstract | ||||
| Purpose: The purpose of this in vitro study was to evaluate the impact of simulated gastric acidity on color stability of different types of dental ceramics. Materials and Methods: Fifty specimens were constructed according to type of the material into five groups (n=10), as follows: Partially stabilized zirconia (PSZ) (Prettaue),Fully stabilized zirconia (FSZ) (Prettaue Anterior), lithium disilicate ceramics (IPS. Emax), Zirconia-containing lithium silicate ceramics (ZLS) (Vita Suprinity) and Hybrid ceramics (Vita Enamic). All specimens were cut with a low-speed diamond saw (Isomet) into a rectangular shape with the following dimension: 12mm width x 14mm length x 1 mm thickness. Color stability was evaluated by reflective spectrophotometer. Each specimen was immersed in 5 ml of the simulated acid of ph 1.2 for 96 h in a37◦C incubator. One-way ANOVA was used to compare mean difference between groups. Results: There was highly significant difference (P=0.000) between all groups. Prettaue group showed the least amount of color change (2.97±1.27), while vita enamic group showed the highest color change (5.97±3.29). Conclusions: The gastric acid changed the color of all types of dental ceramics. Except for Partially stabilized zirconia and lithium disilicate ceramics, the color change of all other ceramics was noticeable to the human eye and then was clinically unacceptable. | ||||
| Keywords | ||||
| ceramic restoration; optical properties; gastric reflux; dental ceramics; color stability | ||||
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