title: The Reinforcement Effect of Nano-Zirconia on the Transverse Strength of Repaired Acrylic Denture Base.
abstract: Objective. The aim of this study was to evaluate the effect of incorporation of glass fiber, zirconia, and nano-zirconia on the transverse strength of repaired denture base. Materials and Methods. Eighty specimens of heat polymerized acrylic resin were prepared and randomly divided into eight groups (n = 10): one intact group (control) and seven repaired groups. One group was repaired with autopolymerized resin while the other six groups were repaired using autopolymerized resin reinforced with 2 wt% or 5 wt% glass fiber, zirconia, or nano-zirconia particles. A three-point bending test was used to measure the transverse strength. The results were analyzed using SPSS and repeated measure ANOVA and post hoc least significance (LSD) test (P ≤ 0.05). Results. Among repaired groups it was found that autopolymerized resin reinforced with 2 or 5 wt% nano-zirconia showed the highest transverse strength (P ≤ 0.05). Repairs with autopolymerized acrylic resin reinforced with 5 wt% zirconia showed the lowest transverse strength value. There was no significant difference between the groups repaired with repair resin without reinforcement, 2 wt% zirconia, and glass fiber reinforced resin. Conclusion. Reinforcing of repair material with nano-zirconia may significantly improve the transverse strength of some fractured denture base polymers.
authors.affiliation: Department of Substitutive Dental Sciences, College of Dentistry, University of Dammam, P.O. Box 1982, Dammam 31411, Saudi Arabia.
authors.forename: Mohammed
authors.identifier: 0000-0003-3193-2356
authors.initials: M
authors.lastname: Gad
authors.affiliation: Department of Substitutive Dental Sciences, College of Dentistry, University of Dammam, P.O. Box 1982, Dammam 31411, Saudi Arabia.
authors.forename: Aws S
authors.initials: AS
authors.lastname: ArRejaie
authors.affiliation: Department of Substitutive Dental Sciences, College of Dentistry, University of Dammam, P.O. Box 1982, Dammam 31411, Saudi Arabia.
authors.forename: Mohamed Saber
authors.initials: MS
authors.lastname: Abdel-Halim
authors.affiliation: Department of Biomaterial Dental Sciences, College of Dentistry, University of Dammam, P.O. Box 1982, Dammam 31411, Saudi Arabia; Department of Dental Materials, College of Dentistry, Al-Azhar University, P.O. Box 11117, Assiut, Egypt.
authors.forename: Ahmed
authors.initials: A
authors.lastname: Rahoma