Effect of surface treatments on color of machinable ceramics | ||||
| Journal of Modern Research | ||||
| Article 10, Volume 3, Issue 1, January 2021, Page 10-14 PDF (961.29 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/jmr.2020.29066.1025 | ||||
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| Authors | ||||
Amna Salem   1; Cherif Mohsen2
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| 1Department of Fixed Prosthodontics, Faculty of Dentistry, Assiut University, 71515 Assiut, Egypt | ||||
| 2Department of Fixed Prosthodontics, Faculty of Dentistry, Minia University, 61519 Minia, Egypt | ||||
| Abstract | ||||
| Aim: The purpose of this study is to evaluate the effect of surface treatments on color of lithium disilicate ceramic (IPS e. max [CAD]) and hybrid ceramic (VITA Suprinity [pc]). Method: Ceramic blocks were sectioned in to one hundred sixty discs; eighty discs of lithium disilicate were randomly subdivided in to four groups according to surface treatment (n= 20). Group C: Control group without surface treatment; group I: using (AL2O3) particles size 50µm; group II: Hydro fluoric (HF) acid etching; group III: tribochemical (TBC) surface treatment. Eighty discs of hybrid ceramic (n= 20) were subdivided in to the same groups. Color measurements were performed with spectrophotometer and repeated after surface treatments. ∆E values were statistically analyzed with one- way ANOVA, Tukey's post hoc test was done to identify significance between groups. Statistically significance was considered when P value ≤ 0.05. Results: Changing color of lithium disilicate specimens were not clinically perceptible except for hydrofluoric acid etching as it was below the clinically accepted threshold (∆E < 2.7). Suprinity hydrofluoric acid etching specimens color changes were clinically acceptable ∆E < 2.7 but air abrasion with Al2O3 50 µm and tribochemical surface treatment specimens showed ∆E > 2.7 which were clinically unaccepted. Conclusion: Different techniques; sand blasting, HF acid etching and tribochemical surface treatments affected color significantly. | ||||
| Keywords | ||||
| Lithium disilicate; suprinity; surface treatment; spectrophotometer; color | ||||
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