Effectiveness of a universal adhesive for repair bonding to composite and amalgam
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- Kanzow Philipp
- Department of Preventive Dentistry, Periodontology and Cariology, University Medical Center Göttingen
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- Baxter Steffi
- Department of Preventive Dentistry, Periodontology and Cariology, University Medical Center Göttingen
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- Rizk Marta
- Department of Preventive Dentistry, Periodontology and Cariology, University Medical Center Göttingen
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- Wassmann Torsten
- Department of Prosthodontics, University Medical Center Göttingen
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- Wiegand Annette
- Department of Preventive Dentistry, Periodontology and Cariology, University Medical Center Göttingen
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<p>The study aimed to compare the repair bond strength of aged composite and amalgam repaired with resin composite after various mechanical and adhesive surface treatments. Specimens were aged by thermal cycling (10,000 cycles, 5-55°C) and randomly subjected to one of three surface treatments: diamond bur abrasion, aluminum oxide air abrasion, or silica coating. Conventional bonding or a universal adhesive with incorporated silane was applied afterward (each n = 16) and resin composite was attached. In the control groups (each n = 16), resin composite was attached using one of the above adhesives without prior mechanical surface conditioning. After further thermal cycling, the shear bond strength (SBS) and failure modes were assessed. Statistical analyses were performed using ANOVA, Weibull statistics, two sample t-tests, and Chi2-test (P < 0.05). The SBS of the repaired amalgam was significantly lower than that of the composite and mechanical pretreatment significantly increased SBS. The universal adhesive significantly improved the SBS of the repaired amalgam compared to the conventional bonding agent and mechanical pretreatment increased the number of cohesive/mixed failures. Amalgam restorations may be repaired using resin composites, but the resulting SBS is lower than that obtained with composite.</p>
収録刊行物
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- Ｊｏｕｒｎａｌ ｏｆ Ｏｒａｌ Ｓｃｉｅｎｃｅ
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Ｊｏｕｒｎａｌ ｏｆ Ｏｒａｌ Ｓｃｉｅｎｃｅ 61 (2), 343-350, 2019
日本大学歯学部