Adhesion procedure for CAD/CAM resin crown bonding: Reduction of bond strengths due to artificial saliva contamination
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- Kawaguchi-Uemura Asuka
- Department of Fixed Prosthodontics, Osaka University Graduate School of Dentistry
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- Mine Atsushi
- Department of Fixed Prosthodontics, Osaka University Graduate School of Dentistry
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- Matsumoto Mariko
- Department of Restorative Dentistry Division of Oral Health Science, Hokkaido University Graduate School of Dental Medicine
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- Tajiri Yuko
- Department of Fixed Prosthodontics, Osaka University Graduate School of Dentistry
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- Higashi Mami
- Department of Fixed Prosthodontics, Osaka University Graduate School of Dentistry
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- Kabetani Tomoshige
- Department of Fixed Prosthodontics, Osaka University Graduate School of Dentistry
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- Hagino Ryosuke
- Department of Fixed Prosthodontics, Osaka University Graduate School of Dentistry
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- Imai Dai
- Department of Fixed Prosthodontics, Osaka University Graduate School of Dentistry
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- Minamino Takuya
- Department of Fixed Prosthodontics, Osaka University Graduate School of Dentistry
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- Miura Jiro
- Division for Interdisciplinary Dentistry, Osaka University Dental Hospital
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- Yatani Hirofumi
- Department of Fixed Prosthodontics, Osaka University Graduate School of Dentistry
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説明
<p>Purpose: The present study aimed to elucidate how saliva contamination affects microtensile bond strength of resin cement to CAD/CAM resin blocks and identify a decontamination method that can restore original bond strength.</p><p>Methods: The KATANA AVENCIA block (Kuraray Noritake Dental) was sandblasted on the adherend surface (P-Co group). Then, the block was contaminated with artificial saliva (Saliveht Aerosol, Teijin). Air dry (N-Co), sandblasting (Sb) and phosphate acid cleaning (AT) groups were prepared. After silane treatment, PANAVIA V5 (Kuraray Noritake Dental) was built up and microtensile bond strength (mTBS) was measured after immersion in water (n = 24 per group). Scanning electron microscopy (SEM) analysis, surface roughness and contact angle measurement of each surface were performed.</p><p>Results: The P-Co group showed the highest mTBS value, and bond strength was significantly lower in the N-Co group than the other groups (P < 0.001). In all groups, decreased bond strength resulted from longterm water storage. In the N-Co group, a contaminated layer was observed on the surface by SEM and the contact angle was significantly smaller than the other groups (P < 0.001). In Sb and AT groups, mTBS values that were reduced by artificial saliva contamination significantly increased but did not recover to P-Co group values (P < 0.001). SEM showed no morphological difference between P-Co, Sb and AT groups. The Sb group showed increased surface roughness.</p><p>Conclusion: The long-term durability of bonds between CAD/CAM resin blocks and luting agent cement was significantly reduced by artificial saliva contamination. However, sandblasting or phosphoric acid cleaning can recover bonding effectiveness by 75–85%.</p>
収録刊行物
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- Journal of Prosthodontic Research
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Journal of Prosthodontic Research 62 (2), 177-183, 2018
公益社団法人 日本補綴歯科学会
