Shear bond strengths of glass-ionomer cements to sound and to prepared carious dentine |
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Authors: | Beata Czarnecka Patricia Deręgowska-Nosowicz Honorata Limanowska-Shaw John W Nicholson |
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Affiliation: | (1) Department of Biomaterials and Experimental Dentistry, Poznań University of Medical Sciences, Poznań, Poland;(2) Biomaterials Group, School of Science, University of Greenwich, Chatham, Kent, ME4 4TB, UK |
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Abstract: | Summary The aim of this study was determine whether bonding of glass-ionomer cements to non-carious dentine differed from that to
carious dentine. Five commercial cements were used, namely Fuji IX GP, Fuji IX capsulated, Fuji IX Fast capsulated (all GC,
Japan), Ketac-Molar and Ketac-Molar Aplicap (both 3M-ESPE, Germany). Following conditioning of the substrate with 10% poly
(acrylic acid) for 10 s, sets of 10 samples of the cements were bonded to prepared teeth that had been removed for orthodontic
reasons. The teeth used had either sound dentine or sclerotic dentine. Shear bond strengths were determined following 24 h
storage. For the auto-mixed cements, shear bond strength to sound dentine was found not to differ statistically from shear
bond strength to sclerotic dentine whereas for hand-mixed cements, shear bond to sound dentine was found to be higher than
to carious dentine (to at least p < 0.05). This shows that the chemical effects arising from interactions of glass-ionomer cements with the mineral phase of
the tooth are the most important in developing strong bonds, at least in the shorter term. |
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