期刊
LASERS IN MEDICAL SCIENCE
卷 32, 期 9, 页码 1981-1993出版社
SPRINGER LONDON LTD
DOI: 10.1007/s10103-017-2302-y
关键词
CO2 9;3 mu m laser; Microsecond short-pulsed; Human enamel; Human dentin; Laboratory study; Shear bond strength; Etch-and-rinse; Self-etch; Scanning electron microscopy
资金
- Convergent Dental, Inc. through the University of California, San Francisco's Contracts & Grants Division
The objective of this study was to evaluate the influence of CO2 9.3 mu m short-pulsed laser irradiation on the shear bond strength of composite resin to enamel and dentin. Two hundred enamel and 210 dentin samples were irradiated with a 9.3 A mu m carbon dioxide laser (Solea, Convergent Dental, Inc., Natick, MA) with energies which either enhanced caries resistance or were effective for ablation. OptiBond Solo Plus [OptiBondTE] (Kerr Corporation, Orange, CA) and Peak Universal Bond light-cured adhesive [PeakTE] (Ultradent Products, South Jordan, UT) were used. In addition, Scotchbond Universal [ScotchbondSE] (3M ESPE, St. Paul, MN) and Peak SE self-etching primer with Peak Universal Bond light-cured adhesive [PeakSE] (Ultradent Products) were tested. Clearfil APX (Kuraray, New York, NY) was bonded to the samples. After 24 h, a single plane shear bond test was performed. Using the caries preventive setting on enamel resulted in increased shear bond strength for all bonding agents except for self-etch PeakSE. The highest overall bond strength was seen with PeakTE (41.29 +/- 6.04 MPa). Etch-and-rinse systems achieved higher bond strength values to ablated enamel than the self-etch systems did. PeakTE showed the highest shear bond strength with 35.22 +/- 4.40 MPa. OptiBondTE reached 93.8% of its control value. The self-etch system PeakSE presented significantly lower bond strength. The shear bond strength to dentin ranged between 19.15 +/- 3.49 MPa for OptiBondTE and 43.94 +/- 6.47 MPa for PeakSE. Etch-and-rinse systems had consistently higher bond strength to CO2 9.3 A mu m laser-ablated enamel. Using the maximum recommended energy for dentin ablation, the self-etch system PeakSE reached the highest bond strength (43.9 +/- 6.5 MPa).
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