2006 Fiscal Year Final Research Report Summary
Studies on the adhesion system between resin-based luting agents and abutments
| Project/Area Number |
17592049
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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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 | Nihon University |
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Principal Investigator |
KAKEHASHI Yoshiyuki Nihon University, School of Dentistry, Associate Professor, 歯学部, 助教授 (80160993)
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| Co-Investigator(Kenkyū-buntansha) |
KOIZUMI Hiroyasu Nihon University, School of Dentistry, Assistant Professor, 歯学部, 講師 (20339229)
KAWAMOTO Yoshikazu Nihon University, School of Dentistry, Assistant, 歯学部, 助手 (40366604)
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| Project Period (FY) |
2005 – 2006
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| Keywords | resin-based cement / bond strength / temporary cement / surface treatment / luting agent / dentin of bovine tooth / resin-based luting agent / prosthetic ceramics |
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| Research Abstract |
The purpose of this study is to examine the influence of temporary cementation on the strength of the bond formed between resin-based luting agent and dentin of abutment. Three temporary cement and four luting agents were evaluated. An acrylic resin plate was luted to bovine dentin using one of three temporary cements ; HY-Bond Temporary Cement Hard, Freegenol Temporary Pack, and Neodyne T. The control group was not treated with its cement. Following the removal of the temporary cement, each dentin substrate was bonded to a silane-treated IPS Empress (ceramic material) with one of four luting agents; Super-Bond C＆B, Panavia F, Nexus II, and Fuji Luting S.
Correct seating of the restoration is an essential requirement for its proper fitting and retention. This can be achieved provided temporary cement is removed completely from the abutment tooth surface. In the present study a routine clinical procedure was examined in which temporary cement was removed from the dentin surface using a mechanical excavator. Significant remnants of each cement brand tested were detected by scanning electron microscopy. The micrographs suggest that additional instruments and/or methods should be employed to ensure the complete removal of temporary cements, prior to the application of surface conditioning agents.
The strength of the bond between the Super-Bond luting agent and dentin was negatively affected by the eugenol temporary cement. The bond strength of the Panavia luting agent was also reduced following temporary cementation with the HY-Bond polycarboxylate cement. However, bond strength to dentin of four luting agents was not negatively affected through the use of the Freegenol Temporary Pack (no-eugenol temporary cement). The combination of these two factors appears to explain the reduction in bond strength. It is important for clinicians to select a temporary cement which is compatible with the chosen adhesive luting agent.
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