Effect of non‐thermal atmospheric plasma on the dentin‐surface topography and composition and on the bond strength of a universal adhesive

Effect of non‐thermal atmospheric plasma on the dentin‐surface topography and composition and on the bond strength of a universal adhesive

This study investigated the effect of application of non‐thermal atmospheric plasma (NTAP) on the topography and composition of the dentin surface, as well as the microtensile bond strength (μTBS) of a universal adhesive to NTAP‐treated dentin. Exposed flat dentin surfaces from human third molars we...

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Bibliographic Details
Published in:European journal of oral sciences Vol. 126; no. 1; pp. 53 - 65
Main Authors: Ayres, Ana P., Bonvent, Jean J., Mogilevych, Borys, Soares, Luis E. S., Martin, Airton A., Ambrosano, Glaucia M., Nascimento, Fábio D., Van Meerbeek, Bart, Giannini, Marcelo
Format: Journal Article
Language:English
Published: England Wiley Subscription Services, Inc 01-02-2018
Subjects:
Adhesive bonding
Adhesives
Aging
Atomic force microscopy
Bond strength
Bonding strength
Dental Bonding
Dentin
Dentin - anatomy & histology
Dentin - chemistry
Dentin - enzymology
Dentin-Bonding Agents - chemistry
Dentistry
Enzymatic activity
Exposure
Fluorescence
Humans
Microscopy
Microscopy, Electron, Scanning
Molar
Molars
Phosphates
Plasma Gases - pharmacology
Pressure
Simulation
Spectroscopy
spectrum analysis
Teeth
tensile strength
Topography
Water treatment
spectrum analysis
tensile strength
dentin
adhesives
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Summary:This study investigated the effect of application of non‐thermal atmospheric plasma (NTAP) on the topography and composition of the dentin surface, as well as the microtensile bond strength (μTBS) of a universal adhesive to NTAP‐treated dentin. Exposed flat dentin surfaces from human third molars were either treated with NTAP for 10 and 30 s or untreated (control). The dentin‐surface topography and chemical composition were characterized by atomic force microscopy (n = 3) and Raman confocal spectroscopy (n = 5), respectively. The μTBS (n = 8) of Scotchbond Universal to dentin was determined after storage for 24 h and 1 yr, either by direct water exposure or under simulated pulpal pressure. In‐situ zymography was used to evaluate the influence of NTAP on the dentin‐enzymatic activity. Non‐thermal atmospheric plasma produced no remarkable topographical or chemical alterations at the dentin surface; only the amount of phosphate decreased following 10 s of treatment with NTAP. After 1 yr of direct water exposure, the μTBS of NTAP‐treated specimens did not differ statistically significantly from that of untreated controls, whereas simulated pulpal pressure‐aging resulted in a significantly higher μTBS for NTAP‐treated dentin. The dentin‐enzymatic activity appeared to be treatment‐dependent, but the untreated controls showed more intense fluorescence within the hybrid layer. Scotchbond Universal maintained its μTBS strength after 1 yr of direct water exposure and simulated pulpal pressure, although remarkable statistical differences between treatments were observed depending on the aging condition.
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ISSN:0909-8836
1600-0722
DOI:10.1111/eos.12388