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Evaluation of plasma treatment effects on improving adhesive–dentin bonding by using the same tooth controls and varying cross‐sectional surface areas
Author(s) -
Dong Xiaoqing,
Ritts Andrew C.,
Staller Corey,
Yu Qingsong,
Chen Meng,
Wang Yong
Publication year - 2013
Publication title -
european journal of oral sciences
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.802
H-Index - 93
eISSN - 1600-0722
pISSN - 0909-8836
DOI - 10.1111/eos.12052
Subject(s) - dentin , adhesive , molar , bond strength , materials science , dentistry , composite material , dental bonding , scanning electron microscope , medicine , layer (electronics)
The objective of this study was to evaluate and verify the effectiveness of plasma treatment for improving adhesive–dentin interfacial bonding by performing microtensile bond‐strength (μ TBS ) testing using the same‐tooth controls and varying cross‐sectional surface areas. Extracted unerupted human third molars were used after removal of the crowns to expose the dentin surface. One half of each dentin surface was treated with a non‐thermal argon plasma brush, whilst the other was shielded with glass slide and used as an untreated control. Adper Single Bond Plus adhesive and Filtek Z250 dental composite were then applied as directed. The teeth thus prepared were further cut into micro‐bar specimens, with cross‐sectional sizes of 1 × 1 mm 2 , 1 × 2 mm 2 , and 1 × 3 mm 2 , for μ TBS testing. The test results showed that plasma‐treated specimens gave substantially stronger adhesive–dentin bonding than their corresponding same‐tooth controls. Compared with their untreated controls, plasma treatment gave statistically significant higher bonding strength for specimens with a cross‐sectional area of 1 × 1 mm 2 and 1 × 2 mm 2 , with mean increases of 30.8% and 45.1%, respectively. Interface examination using optical and electron microscopy verified that plasma treatment improved the quality of the adhesive–dentin interface by reducing defects/voids and increasing the resin tag length in dentin tubules.