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Related Experiment Videos

Acidic solubility of luting cements.

M Eisenburger1, M Addy, A Rossbach

  • 1Department of Prosthetic Dentistry, Medical University of Hanover, Carl-Neuberg Strasse 1, Hanover, Germany. m.eisenburger@gmx.de

Journal of Dentistry
|March 26, 2003
PubMed
Summary

Zinc phosphate cement and glass ionomer cement showed significant erosion in citric acid, with higher erosion at lower pH. Resin cement resisted erosion, indicating superior durability for dental restorations.

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Area of Science:

  • Dental Materials Science
  • Biomaterials Research
  • Chemical Degradation Studies

Background:

  • Chemical disintegration of luting cements compromises long-term dental restoration success.
  • Understanding cement erosion is crucial for predicting clinical longevity.

Purpose of the Study:

  • To evaluate the erosion susceptibility of zinc phosphate cement (ZPC), glass ionomer cement (GIC), and resin cement (RC) at varying pH levels.
  • To compare the erosion resistance of these dental cements to that of natural dental tissues.

Main Methods:

  • Samples of ZPC and GIC were exposed to 0.3% citric acid at pH 3.0-7.0 and 35°C, with profilometry after 30 min and 1h.
  • RC samples were eroded at pH 3.0 for up to 7 days, with saline controls for all cements.
  • In vitro erosion was compared to enamel and dentine erosion data.

Main Results:

  • ZPC exhibited significantly higher erosion than GIC across all tested pH values, with increased erosion depth at lower pH.
  • No erosion was observed in saline control groups for any cement type.
  • RC showed no surface profile changes after 7 days of erosion, while ZPC erosion exceeded that of enamel and dentine, and GIC erosion was comparable to dental tissues.

Conclusions:

  • Resin cement demonstrates superior resistance to chemical erosion compared to zinc phosphate and glass ionomer cements.
  • Glass ionomer cement shows moderate erosion resistance, while zinc phosphate cement is highly susceptible to acid erosion.
  • These findings highlight the importance of cement selection based on the oral environment's pH for optimal restoration durability.

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