title: Comparison of flexural strength in three types of denture base resins: An in vitro study.
abstract: OBJECTIVE
  The aim of this study was to evaluate whether the flexural strength of a commercially available, heat polymerized acrylic denture base material could be improved using reinforcements.
  
  
  METHODS
  A total of 30 specimens (65 mm × 10 mm × 3 mm) were fabricated; the specimens were divided into three groups with 10 specimens each. They were Group 1 - conventional denture base resins, Group 2 - high impact denture base resins, and Group 3 - glass reinforced denture base resins. The specimens were loaded until failure on a three-point bending test machine. An one-way analysis of variance was used to determine statistical differences among the flexural strength of three groups. Data were analyzed by SPSS software version 21.0© (IBM Corporation, Armonk, NY, USA) and the results were obtained.
  
  
  RESULTS
  The flexural strength values showed statistically significant differences among experimental groups (P < 0.005).
  
  
  CONCLUSIONS
  Within the limitations of the study polymethyl methacrylate (PMMA) reinforced with glass fibers showed the highest flexural strength values this was followed by PMMA reinforced with butadiene styrene, and the least strength was observed in the conventional denture base resins.
authors.affiliation: Department of Prosthodointics, Rajah Mutiah Dental College, Chidambaram, Tamil Nadu, India.
authors.forename: R Arun
authors.initials: RA
authors.lastname: Jaikumar
authors.affiliation: Department of Prosthodointics, Rajah Mutiah Dental College, Chidambaram, Tamil Nadu, India.
authors.forename: Suma
authors.initials: S
authors.lastname: Karthigeyan
authors.affiliation: Department of Prosthodointics, Rajah Mutiah Dental College, Chidambaram, Tamil Nadu, India.
authors.forename: Syed Asharf
authors.initials: SA
authors.lastname: Ali
authors.affiliation: Department of Oral Medicine and Radiology, Indira Gandhi Institute of Dental Sciences, Puducherry, India.
authors.forename: N Madhulika
authors.initials: NM
authors.lastname: Naidu
authors.affiliation: Department of Oral and Maxillo Facial Surgery, Rajah Mutiah Dental College, Chidambaram, Tamil Nadu, India.
authors.forename: R Pradeep
authors.initials: RP
authors.lastname: Kumar
authors.affiliation: Department of Orthodontics, Adhiparasakthi Dental College, Melmaruvathur, Tamil Nadu, India.
authors.forename: K
authors.initials: K
authors.lastname: Vijayalakshmi
keywords: Dies; flexural strength; glass reinforced denture base resins; high impact denture base resins; polymethyl methacrylate; reinforcements; specimen