title: The assessment of surface roughness and microleakage of eroded tooth-colored dental restorative materials.
abstract: OBJECTIVE
  To investigate the effect of acidic solution on surface roughness and microleakage of tooth-colored restorative materials.
  
  
  METHODS
  A 160 box-shaped cavities were prepared on the buccal surfaces of 160 human molars, and assigned to four groups: Group A restored with Ketac™ Molar Easymix, Group B with Fuji II™ LC, Group C with Ketac™ N100, and Group D with Filtek™ Z250, and subdivided into study and control groups (n = 20). Study groups were immersed in lemon juice (pH = 2.79) for 24 h, whilst controlgroups in deionized distilled water. All samples were immersed in 2% methylene blue dye, sectioned into two equal halves for surface roughness, and microleakage tests. Data were analyzed using Mann-Whitney and Kruskal-Wallis tests at P < 0.05.
  
  
  RESULTS
  There was a significant difference in surface roughness of Ketac™ Molar, Fuji II™ LC, and Ketac™ N100. No significant difference was found in microleakage of Ketac™ Molar and Fuji II™ LC; however, there were significant differences in the gingival margin of Ketac™ N100, and the occlusal margin of Filtek™ Z250.
  
  
  CONCLUSIONS
  All glass ionomer cements were eroded after exposure to the acidic drink. Filtek™ Z250 and Ketac™ Molar Easymix showed more microleakage. All materials showed more microleakage at the gingival margins.
authors.affiliation: Conservative Unit, School of Dental Sciences, Health Campus, Universiti Sains Malaysia, 16150 Kubang Kerian, Kelantan, Malaysia.
authors.forename: Thulfiqar Ali
authors.initials: TA
authors.lastname: Hussein
authors.affiliation: Conservative Unit, School of Dental Sciences, Health Campus, Universiti Sains Malaysia, 16150 Kubang Kerian, Kelantan, Malaysia.
authors.forename: Wan Zaripah Wan
authors.initials: WZ
authors.lastname: Bakar
authors.affiliation: Prosthodontic Unit, School of Dental Sciences, Health Campus, Universiti Sains Malaysia, 16150 Kubang Kerian, Kelantan, Malaysia.
authors.forename: Zuryati Ab
authors.initials: ZA
authors.lastname: Ghani
authors.affiliation: Biomaterial Unit, School of Dental Sciences, Health Campus, Universiti Sains Malaysia, 16150 Kubang Kerian, Kelantan, Malaysia.
authors.forename: Dasmawati
authors.initials: D
authors.lastname: Mohamad
keywords: Composite resin; erosion; glass ionomer; microleakage; surface roughness