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Dentinal Fluid Movement Associated with Loading of Restorations

Department of Operative Dentistry, Asahi University, School of Dentistry, 1851, Hozumi, Hozumicho, Motosugun, Gifu 501-02, Japan

M. Nakashima

Department of Endodontics, Asahi University, School of Dentistry, 1851, Hozumi, Hozumicho, Motosugun, Gifu 501-02, Japan

I. Sekine

Department of Endodontics, Asahi University, School of Dentistry, 1851, Hozumi, Hozumicho, Motosugun, Gifu 501-02, Japan

Y. Mukouyama

Department of Endodontics, Asahi University, School of Dentistry, 1851, Hozumi, Hozumicho, Motosugun, Gifu 501-02, Japan

K. Kimura

Department of Operative Dentistry, Asahi University, School of Dentistry, 1851, Hozumi, Hozumicho, Motosugun, Gifu 501-02, Japan

Post-operative biting sensitivity is a significant clinical problem after placement of posterior resin composites and may be due to dentinal fluid movement. The occlusal surfaces of extracted teeth were filled with amalgam (control) or various posterior resin composites, and the movement of the dentinal fluid induced by the loading of the restorations was studied. In addition, the firing of pulpal nerves induced by the loading of class 5 resin composite restorations in canine teeth of dogs was also investigated.

When the entire cavity was etched with an acid gel and then filled with resin composite, dentinal fluid movement in response to loading was significantly (p<0.01) greater than in the amalgam-filled or unoperated controls. The dog canine tooth filled with resin composite showed firing of pulpal nerves when loaded.

These results suggest that the movement of dentinal fluid induced by masticatory pressure on resin composite restorations may elicit biting sensitivity.

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Journal of Dental Research, Vol. 70, No. 6, 975-978 (1991)
DOI: 10.1177/00220345910700061301


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This Article Abstract Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Email this article to a friend Similar articles in this journal Similar articles in PubMed Alert me to new issues of the journal Add to Saved Citations Download to citation manager Request Permissions Request Reprints Add to My Marked Citations Citing Articles Citing Articles via Google Scholar Citing Articles via Scopus Google Scholar Articles by Hirata, K. Articles by Kimura, K. Search for Related Content PubMed PubMed Citation Articles by Hirata, K. Articles by Kimura, K. Social Bookmarking                         What's this?