The Effect of Substrate and Resin Cement Shades on the Optical Properties of Two Ceramic Laminate Veneer Materials | ||||
| Al-Azhar Dental Journal for Girls | ||||
| Article 7, Volume 8, 2-A, April 2021, Page 223-230 PDF (593.07 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/adjg.2021.23273.1234 | ||||
 View on SCiNiTO | ||||
| Authors | ||||
Hanan M. Yousef  1; Sahar A. Abd El Aziz2; Zienb R. El Sharkawy3
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| 1Dentist at General Authority for Health Insurance, Giza, Egypt. | ||||
| 2Professor of Crowns and Bridges, Faculty of Dental Medicine for Girls, Al-Azhar University, Cairo, Egypt. | ||||
| 3Lecturer of Crowns and Bridges, Faculty of Dental Medicine for Girls, Al-Azhar University, Cairo, Egypt. | ||||
| Abstract | ||||
| Purpose: The current study aimed to investigate the effect of substrate and resin cement shades on the optical properties of two ceramic laminate veneer materials. Materials and Methods: Sixty four thin slices of ceramics were made from the two materials (IPS e.max CAD, Vita Suprinity).They were divided into two equal groups (n=32). Each group was subdivided into two subgroups (n=16) regarding to substrate shade (A3,C4)on which each ceramic slice was cemented. Each Subgroup was further subdivided into 2 divisions (n=8) according to resin cement shade (A1,WO). Color measurement was done after cementation by using reflective spectrophotometer then thermal aging process was done for 5000 cycles.(ΔE) values from a reference color (A1 shade) was calculated.Results: By comparing ceramic types vita suprinity recorded statistically significant lower mean (ΔE) values than IPS e.max CAD.By comparing resin cement shade on (ΔE) ,white opaque cement recorded statistically significant lower mean (ΔE) value than A1 cement. As regards the effect of substrate,C4 composite recorded statistically significant higher mean(ΔE)value than A3 composite. Finally thermal aging effect on (ΔE),color change mean values after aging was statistically non-significant higher than that before aging. Conclusion: The mean color change (ΔE) was clinically acceptable for Vita Suprinity group than E.max CAD group, vita suprinity ceramic can mask dark substrate more than E.max CAD and white opaque cement shade also give better masking effect of dark substrate. After thermo cycling color change was statistically non-significant higher than that before aging. | ||||
| Keywords | ||||
| Dental ceramics; Optical properties; Resin cement; laminate veneer | ||||
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