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논문 기본 정보

자료유형
학술저널
저자정보
Cecilia Goracci (University of Siena) Mutlu Özcan (University of Zurich) Lorenzo Franchi (University of Florence) Giuseppe Di Bello (University of Siena) Chris Louca (University of Portsmouth Dental Academy) Alessandro Vichi (University of Portsmouth Dental Academy)
저널정보
대한치과교정학회 대한치과교정학회지 대한치과교정학회지 제49권 제6호
발행연도
2019.11
수록면
404 - 412 (9page)

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초록· 키워드

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Objective: To assess shear bond strength and failure mode (Adhesive Remnant Index, ARI) of orthodontic brackets bonded to polymethylmethacrylate (PMMA) blocks for computer-aided design/manufacture (CAD/CAM) fabrication of temporary restorations, following substrate chemical or mechanical treatment. Methods: Two types of PMMA blocks were tested: CAD-Temp<SUP>®</SUP> (VITA) and Telio<SUP>®</SUP> CAD (Ivoclar-Vivadent). The substrate was roughened with 320-grit sandpaper, simulating a fine-grit diamond bur. Two universal adhesives, Scotchbond Universal Adhesive (SU) and Assure Plus (AP), and a conventional adhesive, Transbond XT Primer (XTP; control), were used in combination with Transbond XT Paste to bond the brackets. Six experimental groups were formed: (1) CADTemp <SUP>®</SUP>/SU; (2) CAD-Temp<SUP>®</SUP>/AP; (3) CAD-Temp<SUP>®</SUP>/XTP; (4) Telio<SUP>®</SUP> CAD/SU; (5) Telio<SUP>®</SUP> CAD/AP; (6) Telio<SUP>®</SUP> CAD/XTP. Shear bond strength and ARI were assessed. On 1 extra block for each PMMA-based material surfaces were roughened with 180-grit sandpaper, simulating a normal/medium-grit (100 mm) diamond bur, and brackets were bonded. Shear bond strengths and ARI scores were compared with those of groups 3, 6. Results: On CAD-Temp<SUP>®</SUP> significantly higher bracket bond strengths than on Telio<SUP>®</SUP> CAD were recorded. With XTP significantly lower levels of adhesion were reached than using SU or AP. Roughening with a coarser bur resulted in a significant increase in adhesion. Conclusions: Bracket bonding to CAD/CAM PMMA can be promoted by grinding the substrate with a normal/medium-grit bur or by coating the intact surface with universal adhesives. With appropriate pretreatments, bracket adhesion to CAD/CAM PMMA temporary restorations can be enhanced to clinically satisfactory levels.

목차

INTRODUCTION
MATERIALS AND METHODS
RESULTS
DISCUSSION
CONCLUSION
REFERENCES

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