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Bond durability between dentinal bonding agents and tooth structure.

E L Davis1, R B Joynt, G Wieczkowski

  • 1Department of Operative Dentistry, State University of New York, School of Dental Medicine, Buffalo.

The Journal of Prosthetic Dentistry
|September 1, 1989
PubMed
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This study examined the durability of dental bonding agents and glass-ionomer cements. Tenure bonding agent showed the strongest bond strength, which improved with thermocycling, unlike other tested materials.

Area of Science:

  • Dental Materials Science
  • Biomaterials Engineering
  • Restorative Dentistry

Background:

  • Modern dentistry utilizes glass-ionomer cements and dentinal bonding agents for cavity preparations without mechanical retention.
  • The long-term success of these restorations depends critically on the durability of the bond strength.
  • Evaluating the longevity of the chemical bond between restorative materials and tooth structure is essential.

Purpose of the Study:

  • To assess the durability of the chemical bond formed by four different dental materials directly bonded to tooth structure.
  • To compare the bond strength retention and changes over time under simulated oral conditions (thermocycling).

Main Methods:

  • Four dental materials, including Tenure bonding agent, Scotchbond bonding agent, Ketac-Bond glass-ionomer cement, and GC lining cement, were bonded directly to tooth structure.

Related Experiment Videos

  • The durability of the chemical bond was evaluated using thermocycling to simulate aging in the oral environment.
  • Bond strength was measured at different thermocycling time points.

    • Main Results:

    • Tenure bonding agent consistently exhibited the strongest bond strength across all thermocycling intervals.
    • While bond strength remained stable for Scotchbond bonding agent, Ketac-Bond glass-ionomer cement, and GC lining cement, Tenure bonding agent demonstrated an increase in bond strength with prolonged thermocycling.
    • This suggests enhanced chemical bonding over time for Tenure bonding agent.

    Conclusions:

    • Tenure bonding agent offers superior and potentially improving bond durability compared to the other tested materials.
    • The findings highlight the importance of material selection for achieving long-lasting dental restorations, particularly in minimally invasive preparations.
    • Further research into the mechanisms behind Tenure bonding agent's increasing bond strength with thermocycling is warranted.