Flexural strength of provisional crown and fixed partial denture resins
Egyptian Journal of Hospital Medicine [The]. 2017; 68 (1): 1003-1009
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| IMEMR
| ID: emr-189936
Biblioteca responsável:
EMRO
Purpose: the purpose of this study was `to appraise the fracture strength of provisional crown and fixed partial denture resins with an in vitro test system
Materials and Methods: bar-type specimens were fabricated according to American National Standards Institute/American Dental Association specification number 27. Reinforcement materials; polyethylene fiber and glass fiber are compared. Provisional crown-bridge materials are autopolymerising Poly Ethyl Metacrylate [PEMA], autopolymerising Poly Methyl Metacrylate [PMMA], bis-acryl composite resin and light cured composite resin]. A total of 150 specimens are arranged for the flexural strength test. The specimens are divided into 5 groups according to the type of resin used [Dentalon Plus, Tetric Ceram, Charisma, Protemp 3, TAB 2000] and then every group was distributed into 3 subgroups rendering to the type of fiber reinforcement [Construct, Fiber-splint ML]. Unreinforcement specimens functioned as the control. Specimens were fractured in a universal testing instrument until the point of rupture. Mean flexural strengths were calculated in MPa. Comparisons were completed with analysis of variance and then Duncan's multiple range tests
Results: mean flexural strengths ranged from 63.45 to 397.8 MPa. There are statistical difference between the groups [Fiber-splint ML, Construct and control]
Conclusion: flexural strengths were material- rather than classification precise. Several, but not all, bis-acryl resins validated expressively superior flexural strength over traditional methacrylate resins. There was significant difference between Fiber-splint ML, Construct and control group
Materials and Methods: bar-type specimens were fabricated according to American National Standards Institute/American Dental Association specification number 27. Reinforcement materials; polyethylene fiber and glass fiber are compared. Provisional crown-bridge materials are autopolymerising Poly Ethyl Metacrylate [PEMA], autopolymerising Poly Methyl Metacrylate [PMMA], bis-acryl composite resin and light cured composite resin]. A total of 150 specimens are arranged for the flexural strength test. The specimens are divided into 5 groups according to the type of resin used [Dentalon Plus, Tetric Ceram, Charisma, Protemp 3, TAB 2000] and then every group was distributed into 3 subgroups rendering to the type of fiber reinforcement [Construct, Fiber-splint ML]. Unreinforcement specimens functioned as the control. Specimens were fractured in a universal testing instrument until the point of rupture. Mean flexural strengths were calculated in MPa. Comparisons were completed with analysis of variance and then Duncan's multiple range tests
Results: mean flexural strengths ranged from 63.45 to 397.8 MPa. There are statistical difference between the groups [Fiber-splint ML, Construct and control]
Conclusion: flexural strengths were material- rather than classification precise. Several, but not all, bis-acryl resins validated expressively superior flexural strength over traditional methacrylate resins. There was significant difference between Fiber-splint ML, Construct and control group
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Índice:
IMEMR
Idioma:
En
Revista:
Egypt. J. Hosp. Med.
Ano de publicação:
2017