Evaluation of marginal integrity of laminate veneers constructed from two different ceramic materials : In-vitro study /
دقة حواف القشرة الخزفية المصنوعة من مادتين مختلفيتين من السراميك : دراسة معملية
Ibrahim Sameh Mohamed Rady ; Supervised Lamiaa Khierallah , Reham Saied Elbasty
- Cairo : Ibrahim Sameh Mohamed Rady , 2019
- 71 P. : facsimiles , photoghraphs ; 25cm
Thesis (M.Sc.) - Cairo University - Faculty of Oral and Dental Medicine - Department of Prosthodontics
Statement of problem: Zirconia reinforced lithium silicate glass-ceramic is considered as a new ceramic material. although, not widely used for the construction of laminate veneer.it would be a promising material regarding the marginal integrity and fracture resistance of laminate veneer. Aim of the study: To evaluate the vertical marginal gap of laminate veneers constructed with two different ceramic materials Materials and method: A total of 16 freshly extracted central incisor were prepared with veneer but-joint design, mounted in epoxy blocks then divided into two equal groups. (n=8) Group (A): Celtra duo, Group (B): E.max CAD. Laminate veneers were scanned with Omnicam designed with biogeneric option and 4.4 CEREC software fabricated by CEREC MC XL milling machine, fired for a short firing cycles, then cemented with Choice 2 resin cement after surface treatment, Measurements were reported after thermocycling. Result: It was found that Celtra duo group recorded higher marginal gap mean value than e.max group mean value and this was statistically significant as indicated by two-way ANOVA test (P=<0.0001< 0.05). Conclusion: Both Celtra duo and e max cad veneers provide clinically acceptable marginal accuracy. Clinical implication: Celtra duo is a promising material to be used for laminate veneers constructions in the esthetic region
E.max CAD Marginal integrity Vertical marginal gap