Micrographic and spectroscopic analyses of the application of methyl methacrylate-p-styrene sulfonic acid copolymer-based desensitizing agents to bovine dentin
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- Kameyama Atsushi
- Department of Operative Dentistry, Endodontology, and Periodontology, School of Dentistry, Matsumoto Dental University, Shiojiri, Japan Department of Operative Dentistry, Cariology and Pulp Biology, Tokyo Dental College, Tokyo, Japan
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- Haruyama Akiko
- Department of Operative Dentistry, Cariology and Pulp Biology, Tokyo Dental College, Tokyo, Japan
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- Nakazawa Yuichi
- Department of Operative Dentistry, Cariology and Pulp Biology, Tokyo Dental College, Tokyo, Japan
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- Furusawa Masahiro
- Department of Endodontics, Tokyo Dental College, Tokyo, Japan
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- Muramatsu Takashi
- Department of Operative Dentistry, Cariology and Pulp Biology, Tokyo Dental College, Tokyo, Japan
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Abstract
<p>Purpose: This study compared the ability of three methyl methacrylate (MMA)-p-styrene sulfonic acid copolymer (MS polymer)-based desensitizers (Pain-Free Gel Dentin Desensitizer; PF-Gel, No-Mix Pain-Free Desensitizer; PF, No-Mix Pain-Free F Desensitizer; PF-F) to occlude dentinal tubules. Materials and Methods: Dentin disc specimens were prepared from bovine incisors and the desensitizers were applied. After dehydration for 24 h or immersion for 1 week in artificial saliva, the surfaces were observed by scanning electron microscope (SEM). PF-Gel specimens also underwent SEM/energy dispersive X-ray spectroscopy (EDS). Results: Application of the desensitizers produced complete occlusion of the dentinal tubules. Most dentinal tubules re-opened after immersion for 1 week in artificial saliva (PF and PF-F samples), but in PF-Gel samples, the dentinal tubules remained occluded. SEM/EDS analysis demonstrated that the granular crystals adhering to the dentin surface contained oxygen, carbon, and calcium, and the plugs occluding the dentinal tubules contained calcium and phosphorus. Conclusion: The findings in this study confirm the sustainable effect of PF-Gel on the occlusion of dentinal tubules.</p>
Journal
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- Asian Pacific Journal of Dentistry
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Asian Pacific Journal of Dentistry 19 (2), 51-57, 2019
Asian Pacific Journal of Dentistry (ICJD Japan Editorial Office)