Journal of Endodontics
Volume 18, Issue 3 , Pages 128-132, March 1992

Effects of carbamide peroxide on dental luting agents*

  • Kathy L. Jefferson, DDS, MS

      Affiliations

    • Dr. Jefferson is assistant professor endodontics, Department of Primary Patient Care, School of Dentistry, University of Louisville, Louisville, KY.
    • Corresponding Author InformationAddress requests for reprints to Dr. Kathy L. Jefferson, University of Louisville, School of Dentistry, 501 South Preston St., Louisville, KY 40292.
    • ,
  • Robert B. Zena, DMD

      Affiliations

    • Dr. Zena is assistant clinical professor of postgraduate prosthodontics, Department of Reconstructive Dentistry, University of Louisville.
    • ,
  • Beverly Giammara, MS

      Affiliations

    • Ms. Giammara is director, Analytical Electron Microscopy Laboratory, Graduate Programs and Research, University of Louisville.

Vital bleaching of natural dentition using a 10% carbamide peroxide in solution may adversely effect restorative materials such as the luting agents. The purpose of this study is to examine surface structure and alterations of atomic weight percentages of elements in (a) zinc phosphate, (b) glass-ionomer, and (c) resin cements after contact with the solution. Dry samples of cement were immersed in a 10% carbamide peroxide solution (pH 4.15) for 1, 6, and 24 h and compared with controls.

Observations by light microscopy, energy-dispersive X-ray microanalysis, and scanning electron microscopy were recorded. Scanning electron microcopic analysis indicated an eroded matrix in the ZnPO4 and glass ionomer samples exposed to carbamide peroxide. Energy-dispersive X-ray microanalysis data indicate a definite time-dependent decrease in the aluminum content for both cements. Surface integrity and atomic weight percentage of elements in resin cement were relatively unchanged after treatment with the peroxide solution or water.

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* This research was supported by grants from the University of Louisville, School of Dentistry Research Foundation, and United States Navy Grant ONR N00014-87-K-0139 and NIH Grant DE07199.

PII: S0099-2399(06)81313-0

doi:10.1016/S0099-2399(06)81313-0

Journal of Endodontics
Volume 18, Issue 3 , Pages 128-132, March 1992

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