Contact angle and surface free energy of experimental resin-based dental restorative materials after chewing simulation

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• 作者：Stefan Rü ; ttermann ; Thomas Beikler ; Ralf Janda ; ^{Ralf.Janda@uni-duesseldorf.de" class="auth_mail} ; ^{ralf.janda@hotmail.de" class="auth_mail}
• 关键词：Dental resin composite ; Chewing simulation ; Contact angle ; Surface free energy
• 刊名：Dental Materials
• 出版年：June 2014
• 年：2014
• 卷：30
• 期：6
• 页码：702-707
• 全文大小：647 K

文摘

To investigate contact angle and surface free energy of experimental dental resin composites containing novel delivery systems of polymeric hollow beads and low-surface tension agents after chewing simulation test.

Methods

A delivery system of novel polymeric hollow beads differently loaded with two low-surface tension agents was used in different amounts to modify commonly formulated experimental dental resin composites. The non-modified resin was used as standard. Surface roughness R  _a, contact angle 螛  , total surface free energy 纬  _S, its apolar yJSB inlineImage" height="17" width="25" alt="View the MathML source" title="View the MathML source" src="/sd/grey_pxl.gif" data-inlimgeid="1-s2.0-S0109564114000852-si9.gif">${纬}_{\text{S}}^{\text{LW}}$, polar abea49e5d8666d71de06e03">yJSB inlineImage" height="17" width="23" alt="View the MathML source" title="View the MathML source" src="/sd/grey_pxl.gif" data-inlimgeid="1-s2.0-S0109564114000852-si10.gif">${纬}_{\text{S}}^{\text{AB}}$, Lewis acid yJSB inlineImage" height="17" width="17" alt="View the MathML source" title="View the MathML source" src="/sd/grey_pxl.gif" data-inlimgeid="1-s2.0-S0109564114000852-si11.gif">${纬}_{\text{S}}^{+}$ and base yJSB inlineImage" height="13" width="17" alt="View the MathML source" style="margin-top: -5px; vertical-align: middle" title="View the MathML source" src="/sd/grey_pxl.gif" data-inlimgeid="1-s2.0-S0109564114000852-si12.gif">${纬}_{\text{S}}^{-}$ terms were determined and the results prior to and after chewing simulation test were compared. Significance was p < 0.05.

Results

After chewing simulation R  _a increased, 螛   decreased, R  _a increased for two test materials and 纬  _S decreased or remained constant for the standard or the test materials after chewing simulation. R  _a of one test material was higher than of the standard, 螛   and 纬  _S of the test materials remained lower than of the standard and, indicating their highly hydrophobic character (螛   &asymp; 60–75°, 纬  _S &asymp; 30 mJ m⁻²). yJSB inlineImage" height="17" width="25" alt="View the MathML source" title="View the MathML source" src="/sd/grey_pxl.gif" data-inlimgeid="1-s2.0-S0109564114000852-si13.gif">${纬}_{\text{S}}^{\text{LW}}$, and yJSB inlineImage" height="13" width="17" alt="View the MathML source" style="margin-top: -5px; vertical-align: middle" title="View the MathML source" src="/sd/grey_pxl.gif" data-inlimgeid="1-s2.0-S0109564114000852-si14.gif">${纬}_{\text{S}}^{-}$ of the test materials were lower than of the standard. Some of the test materials had lower yJSB inlineImage" height="17" width="23" alt="View the MathML source" title="View the MathML source" src="/sd/grey_pxl.gif" data-inlimgeid="1-s2.0-S0109564114000852-si15.gif">${纬}_{\text{S}}^{\text{AB}}$ and yJSB inlineImage" height="17" width="17" alt="View the MathML source" title="View the MathML source" src="/sd/grey_pxl.gif" data-inlimgeid="1-s2.0-S0109564114000852-si16.gif">${纬}_{\text{S}}^{+}$ than of the standard.

Significance

Delivery systems based on novel polymeric hollow beads highly loaded with low-surface tension agents were found to significantly increase contact angle and thus to reduce surface free energy of experimental dental resin composites prior to and after chewing simulation test.