Journal of Dentistry
Volume 34, Issue 4 , Pages 269-276, April 2006

Application of DIAGNOdent® as a guide for removing carious dentin with Er:YAG laser

  • Kazuaki Yonemoto

      Affiliations

    • Department of Endodontics and Operative Dentistry, School of Dentistry at Tokyo, Nippon Dental University, 1-9-20 Fujimi Chiyoda-ku Tokyo, 102-8159 Japan
    • Corresponding Author InformationCorresponding author. Tel.: +81 3 3261 5781; fax: +81 3 3261 3924.
    • ,
  • Toru Eguro

      Affiliations

    • Department of Endodontics and Operative Dentistry, School of Dentistry at Tokyo, Nippon Dental University, 1-9-20 Fujimi Chiyoda-ku Tokyo, 102-8159 Japan
    • ,
  • Toru Maeda

      Affiliations

    • Division of General Dentistry, Nippon Dental University Dental Hospital, 2-3-16 Fujimi Chiyoda-ku Tokyo, 102-8158 Japan
    • ,
  • Hisayoshi Tanaka

      Affiliations

    • Department of Endodontics and Operative Dentistry, School of Dentistry at Tokyo, Nippon Dental University, 1-9-20 Fujimi Chiyoda-ku Tokyo, 102-8159 Japan

Received 24 November 2004; received in revised form 25 June 2005; accepted 7 July 2005.

Summary 

Objectives

The purpose of this study was to investigate the DIAGNOdent® values applicable as a guide for removal of outer layer of carious dentin with Er:YAG laser.

Methods

Carious dentin of human extracted molars was removed by bur with Caries Detector® (Group 1: red stained dentin was left, Group 2: light pink stained dentin was left) and by Er:YAG laser with DIAGNOdent® value as a guide (30>Group 3>21, 20>Group 4>11, 10>Group 5). The cavity floor dentin after removing carious dentin was examined using microradiograms, EPMA and SEM.

Results

The cavity floor dentin of group 1,3 showed the decreases in the degree of X-ray absorption. In group 2,4 and 5, decrease of Ca, P were not observed. The decrease of Mg was observed on the more superficial part of the cavity floor for group 3 than for group 4.

Conclusions

When carious dentin was removed using Er:YAG laser, the carious dentin outer layer was ideally removed with DIAGNOdent® values: 11–20. DIAGNOdent® values: 11–20, could indicate the completion of outer layer removal of carious dentin with Er:YAG laser, but there are some problems that must be addressed before the clinical application.

Keywords: Er:YAG laser, Caries removal, Carious dentin, Guide of carious dentin removal, EPMA analysis, Microradiographic observation, SEM observation, DIAGNOdent®

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PII: S0300-5712(05)00144-2

doi:10.1016/j.jdent.2005.07.001

Journal of Dentistry
Volume 34, Issue 4 , Pages 269-276, April 2006

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