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Effect of denture cleaning on abrasion resistance and surface topography of polymerized CAD CAM acrylic resin denture base

Identifieur interne : 007086 ( Ncbi/Merge ); précédent : 007085; suivant : 007087

Effect of denture cleaning on abrasion resistance and surface topography of polymerized CAD CAM acrylic resin denture base

Auteurs : Lana Ahmed Shinawi

Source :

RBID : PMC:5498689

Abstract

Background

The application of computer-aided design computer-aided manufacturing (CAD CAM) technology in the fabrication of complete dentures, offers numerous advantages as it provides optimum fit and eliminates polymerization shrinkage of the acrylic base. Additionally, the porosity and surface roughness of CAD CAM resins is less compared to conventionally processed resins which leads to a decrease in the adhesion of bacteria on the denture base, which is associated with many conditions including halitosis and aspiration pneumonia in elderly denture wearers.

Aim

To evaluate the influence of tooth brushing with dentifrices on CAD CAM resin blocks in terms of abrasion resistance, surface roughness and scanning electron photomicrography.

Methods

This experimental study was carried out at the Faculty of Dentistry of King Abdulaziz University during 2016. A total of 40 rectangular shaped polymerized CAD CAM resin samples were subjected to 40.000 and 60.000 brushing strokes under a 200-gram vertical load simulating three years of tooth brushing strokes using commercially available denture cleaning dentifrice. Data were analyzed by SPSS version 20, using descriptive statistics and ANOVA.

Results

ANOVA test revealed a statistical significant weight loss of CAD CAM acrylic resin denture base specimens following 40.000 and 60.000 brushing strokes as well as a statistical significant change (p=0.0.5) in the surface roughness following brushing. The CAD CAM resin samples SEM baseline imaging revealed a relatively smooth homogenous surface, but following 40,000 and 60,000 brushing strokes, imaging displayed the presence of small scratches on the surface.

Conclusion

CAD CAM resin displayed a homogenous surface initially with low surface roughness that was significantly affected following simulating three years of manual brushing, but despite the significant weight loss, the findings are within the clinically acceptable limits.


Url:
DOI: 10.19082/4281
PubMed: 28713496
PubMed Central: 5498689

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<title xml:lang="en">Effect of denture cleaning on abrasion resistance and surface topography of polymerized CAD CAM acrylic resin denture base</title>
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<title xml:lang="en" level="a" type="main">Effect of denture cleaning on abrasion resistance and surface topography of polymerized CAD CAM acrylic resin denture base</title>
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<title>Background</title>
<p>The application of computer-aided design computer-aided manufacturing (CAD CAM) technology in the fabrication of complete dentures, offers numerous advantages as it provides optimum fit and eliminates polymerization shrinkage of the acrylic base. Additionally, the porosity and surface roughness of CAD CAM resins is less compared to conventionally processed resins which leads to a decrease in the adhesion of bacteria on the denture base, which is associated with many conditions including halitosis and aspiration pneumonia in elderly denture wearers.</p>
</sec>
<sec>
<title>Aim</title>
<p>To evaluate the influence of tooth brushing with dentifrices on CAD CAM resin blocks in terms of abrasion resistance, surface roughness and scanning electron photomicrography.</p>
</sec>
<sec>
<title>Methods</title>
<p>This experimental study was carried out at the Faculty of Dentistry of King Abdulaziz University during 2016. A total of 40 rectangular shaped polymerized CAD CAM resin samples were subjected to 40.000 and 60.000 brushing strokes under a 200-gram vertical load simulating three years of tooth brushing strokes using commercially available denture cleaning dentifrice. Data were analyzed by SPSS version 20, using descriptive statistics and ANOVA.</p>
</sec>
<sec>
<title>Results</title>
<p>ANOVA test revealed a statistical significant weight loss of CAD CAM acrylic resin denture base specimens following 40.000 and 60.000 brushing strokes as well as a statistical significant change (p=0.0.5) in the surface roughness following brushing. The CAD CAM resin samples SEM baseline imaging revealed a relatively smooth homogenous surface, but following 40,000 and 60,000 brushing strokes, imaging displayed the presence of small scratches on the surface.</p>
</sec>
<sec>
<title>Conclusion</title>
<p>CAD CAM resin displayed a homogenous surface initially with low surface roughness that was significantly affected following simulating three years of manual brushing, but despite the significant weight loss, the findings are within the clinically acceptable limits.</p>
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<pmc article-type="research-article">
<pmc-dir>properties open_access</pmc-dir>
<front>
<journal-meta>
<journal-id journal-id-type="nlm-ta">Electron Physician</journal-id>
<journal-id journal-id-type="iso-abbrev">Electron Physician</journal-id>
<journal-id journal-id-type="publisher-id">Electronic physician</journal-id>
<journal-title-group>
<journal-title>Electronic Physician</journal-title>
</journal-title-group>
<issn pub-type="epub">2008-5842</issn>
<publisher>
<publisher-name>Electronic physician</publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id pub-id-type="pmid">28713496</article-id>
<article-id pub-id-type="pmc">5498689</article-id>
<article-id pub-id-type="doi">10.19082/4281</article-id>
<article-id pub-id-type="publisher-id">epj-09-4281</article-id>
<article-categories>
<subj-group subj-group-type="heading">
<subject>Original Article</subject>
</subj-group>
</article-categories>
<title-group>
<article-title>Effect of denture cleaning on abrasion resistance and surface topography of polymerized CAD CAM acrylic resin denture base</article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname>Shinawi</surname>
<given-names>Lana Ahmed</given-names>
</name>
<xref ref-type="corresp" rid="c1-epj-09-4281"></xref>
</contrib>
</contrib-group>
<aff id="af1-epj-09-4281">
<label>1</label>
BDS MSc. MCD. PhD, Associate Professor and Consultant, Department of Oral and Maxillofacial Prosthodontics, Faculty of Dentistry, King Abdulaziz University, Jeddah, Saudi Arabia</aff>
<author-notes>
<corresp id="c1-epj-09-4281">Corresponding author: Associate Professor Dr. Lana Ahmed Shinawi, Department of Oral and Maxillofacial Prosthodontics, Faculty of Dentistry, King Abdulaziz University, P.O. Box 80209, Jeddah 21589, Saudi Arabia. Tel: +966506613848, Fax: +966695-2847, E mail:
<email>lshinawi@kau.edu.sa</email>
and
<email>lanashinawi@gmail.com</email>
</corresp>
</author-notes>
<pub-date pub-type="collection">
<month>5</month>
<year>2017</year>
</pub-date>
<pub-date pub-type="epub">
<day>25</day>
<month>5</month>
<year>2017</year>
</pub-date>
<volume>9</volume>
<issue>5</issue>
<fpage>4281</fpage>
<lpage>4288</lpage>
<history>
<date date-type="received">
<day>18</day>
<month>2</month>
<year>2017</year>
</date>
<date date-type="accepted">
<day>19</day>
<month>4</month>
<year>2017</year>
</date>
</history>
<permissions>
<copyright-statement>© 2017 The Authors</copyright-statement>
<copyright-year>2017</copyright-year>
<license>
<license-p>This is an open access article under the terms of the
<ext-link ext-link-type="uri" xlink:href="http://creativecommons.org/licenses/by-nc-nd/3.0/">Creative Commons Attribution-NonCommercial-NoDerivs License</ext-link>
, which permits use and distribution in any medium, provided the original work is properly cited, the use is non-commercial and no modifications or adaptations are made.</license-p>
</license>
</permissions>
<abstract>
<sec>
<title>Background</title>
<p>The application of computer-aided design computer-aided manufacturing (CAD CAM) technology in the fabrication of complete dentures, offers numerous advantages as it provides optimum fit and eliminates polymerization shrinkage of the acrylic base. Additionally, the porosity and surface roughness of CAD CAM resins is less compared to conventionally processed resins which leads to a decrease in the adhesion of bacteria on the denture base, which is associated with many conditions including halitosis and aspiration pneumonia in elderly denture wearers.</p>
</sec>
<sec>
<title>Aim</title>
<p>To evaluate the influence of tooth brushing with dentifrices on CAD CAM resin blocks in terms of abrasion resistance, surface roughness and scanning electron photomicrography.</p>
</sec>
<sec>
<title>Methods</title>
<p>This experimental study was carried out at the Faculty of Dentistry of King Abdulaziz University during 2016. A total of 40 rectangular shaped polymerized CAD CAM resin samples were subjected to 40.000 and 60.000 brushing strokes under a 200-gram vertical load simulating three years of tooth brushing strokes using commercially available denture cleaning dentifrice. Data were analyzed by SPSS version 20, using descriptive statistics and ANOVA.</p>
</sec>
<sec>
<title>Results</title>
<p>ANOVA test revealed a statistical significant weight loss of CAD CAM acrylic resin denture base specimens following 40.000 and 60.000 brushing strokes as well as a statistical significant change (p=0.0.5) in the surface roughness following brushing. The CAD CAM resin samples SEM baseline imaging revealed a relatively smooth homogenous surface, but following 40,000 and 60,000 brushing strokes, imaging displayed the presence of small scratches on the surface.</p>
</sec>
<sec>
<title>Conclusion</title>
<p>CAD CAM resin displayed a homogenous surface initially with low surface roughness that was significantly affected following simulating three years of manual brushing, but despite the significant weight loss, the findings are within the clinically acceptable limits.</p>
</sec>
</abstract>
<kwd-group>
<kwd>Denture cleansing</kwd>
<kwd>Denture base materials</kwd>
<kwd>CAD CAM</kwd>
<kwd>Abrasion resistance</kwd>
<kwd>Surface roughness</kwd>
</kwd-group>
</article-meta>
</front>
<floats-group>
<fig id="f1-epj-09-4281" position="float">
<label>Figure 1</label>
<caption>
<p>Acrylic resin specimen inside tooth brushing machine.</p>
</caption>
<graphic xlink:href="EPJ-09-4281-g001"></graphic>
</fig>
<fig id="f2-epj-09-4281" position="float">
<label>Figure 2</label>
<caption>
<p>Surface of CAD CAM resin at baseline (a X350 and b X700 magnification).</p>
</caption>
<graphic xlink:href="EPJ-09-4281-g002"></graphic>
</fig>
<fig id="f3-epj-09-4281" position="float">
<label>Figure 3</label>
<caption>
<p>Surface of CAD CAM resin following 40000 brushing strokes (a X350 and b X700 magnification).</p>
</caption>
<graphic xlink:href="EPJ-09-4281-g003"></graphic>
</fig>
<fig id="f4-epj-09-4281" position="float">
<label>Figure 4</label>
<caption>
<p>SEM of CAD CAM acrylic resin denture base specimen surface after 60000 brushing strokes (a X350 and b X700 magnification).</p>
</caption>
<graphic xlink:href="EPJ-09-4281-g004"></graphic>
</fig>
<table-wrap id="t1-epj-09-4281" position="float">
<label>Table 1</label>
<caption>
<p>The mean values of weight loss (mg) of CAD CAM resin</p>
</caption>
<table frame="box" rules="all">
<thead>
<tr>
<th valign="top" align="left" rowspan="1" colspan="1">Parameter</th>
<th valign="top" align="left" rowspan="1" colspan="1">Baseline</th>
<th valign="top" align="left" rowspan="1" colspan="1">After 40.000</th>
<th valign="top" align="left" rowspan="1" colspan="1">After 60.000</th>
</tr>
</thead>
<tbody>
<tr>
<td valign="top" align="left" rowspan="1" colspan="1">Mean ± SD</td>
<td valign="top" align="left" rowspan="1" colspan="1">8.87±0.09</td>
<td valign="top" align="left" rowspan="1" colspan="1">8.65±0.07</td>
<td valign="top" align="left" rowspan="1" colspan="1">8.47±0.09</td>
</tr>
<tr>
<td valign="top" align="left" rowspan="1" colspan="1">Mean Difference</td>
<td valign="top" align="left" rowspan="1" colspan="1"></td>
<td valign="top" align="left" rowspan="1" colspan="1">0.22</td>
<td valign="top" align="left" rowspan="1" colspan="1">0.4</td>
</tr>
<tr>
<td valign="top" align="left" rowspan="1" colspan="1">p-value</td>
<td colspan="3" valign="top" align="left" rowspan="1"><0.001</td>
</tr>
<tr>
<td valign="top" align="left" rowspan="1" colspan="1">Significance</td>
<td colspan="3" valign="top" align="left" rowspan="1">p1<0.001, p2<0.001, p3<0.001</td>
</tr>
</tbody>
</table>
</table-wrap>
<table-wrap id="t2-epj-09-4281" position="float">
<label>Table 2</label>
<caption>
<p>The mean values of surface roughness (Ra μm) of CAD CAM resin denture</p>
</caption>
<table frame="box" rules="all">
<thead>
<tr>
<th valign="top" align="left" rowspan="1" colspan="1">Parameter</th>
<th valign="top" align="left" rowspan="1" colspan="1">Baseline</th>
<th valign="top" align="left" rowspan="1" colspan="1">After 40.000</th>
<th valign="top" align="left" rowspan="1" colspan="1">After 60.000</th>
</tr>
</thead>
<tbody>
<tr>
<td valign="top" align="left" rowspan="1" colspan="1">Mean ± SD</td>
<td valign="top" align="left" rowspan="1" colspan="1">0.30 ± 0.07</td>
<td valign="top" align="left" rowspan="1" colspan="1">0.36 ± 0.10</td>
<td valign="top" align="left" rowspan="1" colspan="1">0.38 ± 0.09</td>
</tr>
<tr>
<td valign="top" align="left" rowspan="1" colspan="1">p-value</td>
<td colspan="3" valign="top" align="left" rowspan="1">0.004</td>
</tr>
<tr>
<td valign="top" align="left" rowspan="1" colspan="1">Significance</td>
<td colspan="3" valign="top" align="left" rowspan="1">p1<0.044, p2<0.012, p3<0.005</td>
</tr>
</tbody>
</table>
</table-wrap>
</floats-group>
</pmc>
<affiliations>
<list></list>
<tree>
<noCountry>
<name sortKey="Shinawi, Lana Ahmed" sort="Shinawi, Lana Ahmed" uniqKey="Shinawi L" first="Lana Ahmed" last="Shinawi">Lana Ahmed Shinawi</name>
</noCountry>
</tree>
</affiliations>
</record>

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