Synthesis of a novel functional monomer and development of an adhesive system appropriate to laser-irradiated dental tissues
| Project/Area Number |
17390517
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
補綴理工系歯学
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| Research Institution | Okayama University |
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Principal Investigator |
SUZUKI Kazuomi Okayama University, Med. Dent. and Pharm Okayama Univ, Prof (30050058)
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| Co-Investigator(Kenkyū-buntansha) |
YOSHIDA Yasuhiro Okayama Univ, Med. Dent. and Pharm, Associate Prof (90281162)
IRIE Masao Okayama Univ, Med. Dent. and Pharm, Assistant Prof (90105594)
TANAKA Jiro Okayama Univ, Med. Dent. and Pharm, Assistant Prof (40171764)
NISHIYAMA Norihiro Dentistry Nihon Univ, Matsudo, Prof. (90112953)
KUBOKI Takuo Okayama Univ, Med. Dent. and Pharm, Prof. (00225195)
峯 篤吏 岡山大学, 医学部歯学部附属病院, 助手 (60379758)
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| Project Period (FY) |
2005 – 2007
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| Project Status |
Completed (Fiscal Year 2007)
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| Budget Amount *help |
¥16,390,000 (Direct Cost: ¥15,700,000、Indirect Cost: ¥690,000)
Fiscal Year 2007: ¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000)
Fiscal Year 2006: ¥2,400,000 (Direct Cost: ¥2,400,000)
Fiscal Year 2005: ¥11,000,000 (Direct Cost: ¥11,000,000)
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| Keywords | Dentin / Laser / Tooth restoration / Composite resin / Adhesion / Surface treatment / Polymer synthesis / Functional monomer / コンポレットレジン / 機械性モノマー |
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| Research Abstract |
Introduction: The use of Er:YAG laser for catty preparations during treatment of dental caries has received attention because there is no unpleasantness of noise and vibration as with air turbine and micromotor, and there is no need of anesthesia for treatment. However, we found that conventional dental adhesive systems do not perform sufficiently well on Er:YAG laser irradiated dental surfaces, and moreover, one of its reasons is the weakness of dental surfaces after laser irradiation. So, due to its importance and clinical significance, we aimed to clarify the dental structure after Er:YAG laser irradiation and its quality as an adhesive surface, along with the development of a new adhesive system appropriate to this surface.
Materials and Methods: 1) Adhesive surfaces preparation: Er:YAG laser (Erwin, Morita Co.) was irradiated with 127mJ, 10pps for 2 sec for enamel and with 69mJ, 10pps for 2 sec for dentin. 2) The primers of the adhesive systems were prepared with triazine-, aminoac
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id-, and epoxy-methacrylate/HEMA and alcohol. 3) The adhesive surfaces above were treated with each type of primer, phosphoric acid esther bonding agent and filled with composite resin (Clearfil APX, Kuraray Co.), then immersed in water at 37□for 24 hours before bond strength measurements.
Results and Discussion: The bond strength of epoxy type primer system to Er:YAG laser irradiated dental adhesive surfaces was 18.6MPa for enamel (control: Megabond/Kuraray Co.; 12MPa), and 17.2MPa for dentin (control: 9MPa). The authors say that these results may be due to oxygen that exists in the space created by microcracks that occurred during laser irradiation of dental adhesive surfaces. As conventional dental adhesives, used in the control group, are of radical polymerization type, the polymerization reaction decrease remarkably in the presence of oxygen. On the other hand, the ring opening polymerization type resin tested in this study may be not much influenced by the presence of oxygen during reaction. Less
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Report
(4 results)
Research Products
(14 results)
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[Journal Article] Spectroscopic characterization of enamel surfaces irradiated with Er : YAG laser2006
Author(s)
Mine, A., Yoshida, Y., Suzuki, K., Nakayama, Y., Yatani, H., Kuboki, T
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Journal Title
Dental Materials journal 25
Pages: 214-218
Description
「研究成果報告書概要(欧文)」より
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[Journal Article] Chemical interacyion of phosphoric acid ester with hydroxyapatite2006
Author(s)
Fukegawa, D., Hayakawa, S., Yoshida,Y., Suzuki, K., Osaka, A., Van Meerbeek, B
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Journal Title
Journal of Dental Research 85
Pages: 941-944
Description
「研究成果報告書概要(欧文)」より
Related Report
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[Presentation] Watts : Effect of Delayed Polishing on Interfacial Gap-formation in Posterior Composites, # 0630, 20062006
Author(s)
M., Irie, K., Suzuki, David, C
Organizer
#0630, 84th Annual Meeting & Exhibition of the IADR
Place of Presentation
Brisbane Convention & Exhibition Centre, Brisbane, Australia
Description
「研究成果報告書概要(欧文)」より
Related Report
