title: Non-destructive evaluation of teeth restored with different composite resins using synchrotron based micro-imaging.
abstract: BACKGROUND
  Application of high resolution synchrotron micro-imaging in microdefects studies of restored dental samples.
  
  
  OBJECTIVE
  The purpose of this study was to identify and compare the defects in restorations done by two different resin systems on teeth samples using synchrotron based micro-imaging techniques namely Phase Contrast Imaging (PCI) and micro-computed tomography (MCT). With this aim acquired image quality was also compared with routinely used RVG (Radiovisiograph).
  
  
  METHODS
  Crowns of human teeth samples were fractured mechanically involving only enamel and dentin, without exposure of pulp chamber and were divided into two groups depending on the restorative composite materials used. Group A samples were restored using a submicron Hybrid composite material and Group B samples were restored using a Nano-Hybrid restorative composite material. Synchrotron based PCI and MCT was performed with the aim of visualization of tooth structure, composite resin and their interface.
  
  
  RESULTS
  The quantitative and qualitative comparison of phase contrast and absorption contrast images along with MCT on the restored teeth samples shows comparatively large number of voids in Group A samples.
  
  
  CONCLUSIONS
  Quality assessment of dental restorations using synchrotron based micro-imaging suggests Nano-Hybrid resin restorations (Group B) are better than Group A.
authors.affiliation: UGC- DAE Consortium for Scientific Research, University Campus, Indore (M.P.), India.
authors.forename: A
authors.initials: A
authors.lastname: Fatima
authors.affiliation: Department of Pedodontics and Preventive Dentistry, Modern Dental College, Indore (M.P.), India.
authors.forename: V K
authors.initials: VK
authors.lastname: Kulkarni
authors.affiliation: Department of Pedodontics and Preventive Dentistry, Modern Dental College, Indore (M.P.), India.
authors.forename: N R
authors.initials: NR
authors.lastname: Banda
authors.affiliation: Neutron & X-ray Physics Division, Bhabha Atomic Research Center, Trombay, Mumbai, India.
authors.forename: A K
authors.initials: AK
authors.lastname: Agrawal
authors.affiliation: Neutron & X-ray Physics Division, Bhabha Atomic Research Center, Trombay, Mumbai, India.
authors.forename: B
authors.initials: B
authors.lastname: Singh
authors.affiliation: Neutron & X-ray Physics Division, Bhabha Atomic Research Center, Trombay, Mumbai, India.
authors.forename: P S
authors.initials: PS
authors.lastname: Sarkar
authors.affiliation: UGC- DAE Consortium for Scientific Research, University Campus, Indore (M.P.), India.
authors.forename: S
authors.initials: S
authors.lastname: Tripathi
authors.affiliation: UGC- DAE Consortium for Scientific Research, University Campus, Indore (M.P.), India.
authors.forename: T
authors.initials: T
authors.lastname: Shripathi
authors.affiliation: Neutron & X-ray Physics Division, Bhabha Atomic Research Center, Trombay, Mumbai, India.
authors.forename: Y
authors.initials: Y
authors.lastname: Kashyap
authors.affiliation: Neutron & X-ray Physics Division, Bhabha Atomic Research Center, Trombay, Mumbai, India.
authors.forename: A
authors.initials: A
authors.lastname: Sinha
mesh_terms: D003188:Composite Resins / Q000032:analysis* / Q000737:chemistry*; D003793:Dental Restoration, Permanent; D019544:Equipment Failure Analysis / Q000379:methods*; D006801:Humans; D017356:Synchrotrons; D055114:X-Ray Microtomography / Q000379:methods*
chemical_list: D003188:Composite Resins
keywords: Phase contrast imaging (PCI); composite resin; dental restoration; edge enhancement; micro computed-tomography (MCT)