title: Comparative evaluation of surface properties of enamel and different esthetic restorative materials under erosive and abrasive challenges: An in vitro study.
abstract: BACKGROUND
  Noncarious tooth surface loss is a normal physiological process occurring throughout the life, but it can often become a problem affecting function, esthetics or cause pain.
  
  
  OBJECTIVE
  The purpose of this study was to assess the effect of erosive and abrasive challenges on the surface microhardness and surface wear of enamel and three different restorative materials, that is, nanofilled composite, microfilled composite and resin-modified glass ionomer cement (RMGIC) by using Vickers microhardness tester and profilometer respectively.
  
  
  METHODS
  Nanofilled composite (Filtek(™) Z350 × T), microfilled composite (Heliomolar(®)) and RMGIC (Fuji II LC) were used in the study.
  
  
  RESULTS
  Nanofilled composite resin has the best resistance to erosion and/or abrasion among all the materials tested, followed by microfilled composite and RMGIC respectively.
  
  
  CONCLUSIONS
  Toothbrush abrasion has a synergistic effect with erosion on substance loss of human enamel, composites, and RMGIC. The susceptibility to acid and/or toothbrush abrasion of human enamel was higher compared to restorative materials.
authors.affiliation: Department of Conservative and Endodontics, National Dental College and Hospital, Dera Bassi, Punjab, India.
authors.forename: Simranjeet
authors.initials: S
authors.lastname: Kaur
authors.affiliation: Department of Conservative and Endodontics, National Dental College and Hospital, Dera Bassi, Punjab, India.
authors.forename: Sameer
authors.initials: S
authors.lastname: Makkar
authors.affiliation: Department of Conservative and Endodontics, National Dental College and Hospital, Dera Bassi, Punjab, India.
authors.forename: Rajneesh
authors.initials: R
authors.lastname: Kumar
authors.affiliation: Department of Conservative and Endodontics, National Dental College and Hospital, Dera Bassi, Punjab, India.
authors.forename: Shinam
authors.initials: S
authors.lastname: Pasricha
authors.affiliation: Department of Conservative and Endodontics, National Dental College and Hospital, Dera Bassi, Punjab, India.
authors.forename: Pranav
authors.initials: P
authors.lastname: Gupta
keywords: Microfilled composite; nanofilled composite; resin modified glass ionomer cement; soft drink; tooth brush