الفهرس 
IntroductionOnly 14 pages are availabe for public view
 |  | from | 88 |  |  |
| | | from | 88 | | |
Abstract
”Objective: To assess and compare the 3-year clinical performance of lithium disilicate with that of hybrid resin nano-ceramic in inlay and onlay restorations. Materials and Methods: Twenty patients, each with two inlay/onlay restorations were enrolled in the current study. Forty restorations were placed, 50% for each material: lithium disilicate (Ivoclar Vivadent Schaan, Liechtenstein) and hybrid resin nano ceramic (VOCO GmbH, Cuxhaven, Germany). The restorations were cemented with Dual cure resin cement ( Bisco: Schaumburg, IL, USA). After try in, a single operator was placed, finished / polished all the restorations. Clinical evaluation was carried out at baseline and at early intervals after placement by two other independent examiners utilizing the modified United States Public Health Service (USPHS) criteria after three-years of follow-up. Chi-square and Fisher‘s exact tests were used to analyze the changes in USPHS parameters during the 3-year period. The base line scores were compared versus scores at the recall visits using Cochrane‘s and MC-Nemar‘s tests. The level of significance was set at p 0.05). Results: Chi-square and Fisher‘s exact tests showed no statistically significant difference between Voco Grandio and IPS e.max ceramic restorations for all evaluated parameters during the different follow-up periods (p > 0.05). Cochrane‘s and MC-Nemar‘s tests indicated statistically significant differences regarding color match within the Voco Grandio group. They also indicated statistically significant differences in marginal discoloration, marginal adaptation, surface texture, and postoperative hypersensitivity within both ceramic material groups (p < 0.05). Kaplan-Meier curve indicated that the survival rate of both ceramic materials was 90%. Conclusions: After 3-year, no observable difference seen in overall clinical effectiveness between hybrid resin nano-ceramic and lithium disilicate inlay/onlay restorations. Keywords: IPS e.max, Lithium disilicate, Hybrid ceramic, Resin nano ceramic, Onlays, inlays, Indirect ceramic restorations, Partial coverage ”Objective: To assess and compare the 3-year clinical performance of lithium disilicate with that of hybrid resin nano-ceramic in inlay and onlay restorations. Materials and Methods: Twenty patients, each with two inlay/onlay restorations were enrolled in the current study. Forty restorations were placed, 50% for each material: lithium disilicate (Ivoclar Vivadent Schaan, Liechtenstein) and hybrid resin nano ceramic (VOCO GmbH, Cuxhaven, Germany). The restorations were cemented with Dual cure resin cement ( Bisco: Schaumburg, IL, USA). After try in, a single operator was placed, finished / polished all the restorations. Clinical evaluation was carried out at baseline and at early intervals after placement by two other independent examiners utilizing the modified United States Public Health Service (USPHS) criteria after three-years of follow-up. Chi-square and Fisher‘s exact tests were used to analyze the changes in USPHS parameters during the 3-year period. The base line scores were compared versus scores at the recall visits using Cochrane‘s and MC-Nemar‘s tests. The level of significance was set at p 0.05). Results: Chi-square and Fisher‘s exact tests showed no statistically significant difference between Voco Grandio and IPS e.max ceramic restorations for all evaluated parameters during the different follow-up periods (p > 0.05). Cochrane‘s and MC-Nemar‘s tests indicated statistically significant differences regarding color match within the Voco Grandio group. They also indicated statistically significant differences in marginal discoloration, marginal adaptation, surface texture, and postoperative hypersensitivity within both ceramic material groups (p < 0.05). Kaplan-Meier curve indicated that the survival rate of both ceramic materials was 90%. Conclusions: After 3-year, no observable difference seen in overall clinical effectiveness between hybrid resin nano-ceramic and lithium disilicate inlay/onlay restorations.