IADR Abstract Archives

Self-Sealing Ability of High Copper Amalgams with Self-Etch Adhesives

Objectives: It takes time that microleakage of high copper amalgams being sealed by corrosion products. Acidic self-etched adhesives make better conditions for interfacial corrosion for amalgam restorations. The aim of this study was to evaluate the effect of self-etched adhesives with different pH on interfacial corrosion potential of high-copper amalgams and its self-sealing ability in the early hours using Electro-Chemical Tests (ECTs).

Methods: 30 premolars were cut to make a slice with a cylindrical cavity of 4.7x4.5 mm with a 0.3 mm floor thickness. All surfaces were sealed with resins, except the cavity floor and its opposite surface. There were five main groups based on Adhesive Resin (AR)/liner used. The control group was left without any AR/liner (No). In other testing groups, (AR)/liner that were used included: I-Bond (IB), Clearfil S3 (S3), Single Bond (SB), and Varnish (V). Each group was divided into two subgroups based on the type of the amalgams (ANA and Tytin) used. (ECTs) like Open Circuit Potential (OCP) of each specimen and the linear Polarization Resistance (LPR) test were performed in artificial saliva.

Results: Except Ana-No, the mean OCP values reached steady after 18 hours. OCP values of the Tytin-No and Tytin-IB were the highest and lowest respectively. In LPR tests, Rp values of Ana-V and Tyt-V were the highest (i.e. lowest corrosion rates). Ana-IB and Tyt-IB samples represent the lowest Rp values (i.e. highest corrosion rates).

Conclusions: I-Bond with the lowest pH showed the highest corrosion whilst the Varnish with the highest pH value revealed the lowest corrosion. Clearfil S3 and Varnish demonstrated lower corrosion rates compared to the control groups, therefore, these agents are not proposed for reducing microleakage in amalgam restoration.


Iranian Division Meeting
2013 Iranian Division Meeting (Tehran, Iran)
Tehran, Iran
2013

Scientific Program
  • Moazzami, Saied Mostafa  ( Mashhad University of Medical Sciences, Mashhad, N/A, Iran )
  • Moosavi, Horieh  ( Dental Materials Research Center, Department of Operative Dentistry, Mashhad University of Medical Science, Mashhad, , Iran )
  • Moddaber, Maryam  ( Operative and Esthetic Dentistry Department, yazd, , Iran )
  • Moayed, Mohamad Hadi  ( Department of Materials and Metallurgical Engineering, Ferdowsi University, Mashhad, , Iran )
  • Parvizi, Reza  ( School of Engineering, Faculty of Science and Technology, Deakin University (DU), Geelong, , Australia )
  • Mokhber, Nima  ( Department of Orthodontics, Academic Center of Education, Culture and Research (ACECR), Mashhad, , Iran )
  • Kazemi, Reza  ( Associated Professor, Farmington, CT, USA )
  • Meharry, Michael  ( Loma Linda University, Loma Linda, CA, USA )
    • Oral Session
    Dental Materials/ Restorative Dentistry
    12/13/2013