title: Role of enamel deminerlization and remineralization on microtensile bond strength of resin composite.
abstract: OBJECTIVE
  This study is aimed to establish the microtensile bond strength of enamel following exposure to an aerated drink at various time intervals with/without application of remineralization agent. In addition, degree of remineralization and demineralization of tooth enamel has been assessed using polarized light microscopy.
  
  
  METHODS
  Seventy extracted human incisors split into two halves were immersed in aerated beverage (cola drink) for 5 min and stored in saliva until the time of microtensile bond testing. Prepared specimens were divided randomly into two study groups; remineralizing group (n = 70): specimens were treated for remineralization using casein phosphopeptides and amorphous calcium phosphate (CPP-ACP) remineralization agent (Recaldent™; GC Europe) and control group (n = 70): no remineralization treatment; specimens were kept in artificial saliva. All specimens were tested for microtensile bond strength at regular intervals (1 h, 1 days, 2 days, 1 week, and 2 weeks) using a universal testing machine. The results statistically analyzed (P = 0.05) using two-way ANOVA test.
  
  
  RESULTS
  Results showed statistically significant increase in bond strength in CPP-ACP tested group (P < 0.05) at all-time intervals. The bond strength of remineralizing group samples at 2 days (~13.64 megapascals [MPa]) is comparable to that of control group after 1 week (~12.44 MPa).
  
  
  CONCLUSIONS
  CPP-ACP treatment of teeth exposed to an aerated drink provided significant increase in bond strength at a shorter interval compared to teeth exposed to saliva alone.
authors.affiliation: Department of Restorative Dental Sciences, Faculty of Dentistry, Jazan University, Jazan, Saudi Arabia.
authors.forename: Abbas
authors.initials: A
authors.lastname: Rizvi
authors.affiliation: Department of Restorative Dentistry, College of Dentistry, Taibah University, Madinah Al Munawwarah, Saudi Arabia.
authors.forename: Muhammad S
authors.initials: MS
authors.lastname: Zafar
authors.affiliation: Department of Restorative Dentistry, College of Dentistry, Taibah University, Madinah Al Munawwarah, Saudi Arabia.
authors.forename: Yasser
authors.initials: Y
authors.lastname: Al-Wasifi
authors.affiliation: Department of Oral and Maxillofacial Surgery, College of Dentistry, Taibah University, Madinah Al Munawwarah, Saudi Arabia.
authors.forename: Wamiq
authors.initials: W
authors.lastname: Fareed
authors.affiliation: Department of Prosthodontics and Biomaterials, School of Dentistry, King Faisal University, Hafuf, Saudi Arabia.
authors.forename: Zohaib
authors.initials: Z
authors.lastname: Khurshid
keywords: Aerated drinks; microtensile bond strength; remineralization-demineralization; remineralizing agent