Polymerization shrinkage and spherical glass mega fillers: effects on cuspal deflection
Identifieur interne : 000107 ( Pmc/Checkpoint ); précédent : 000106; suivant : 000108Polymerization shrinkage and spherical glass mega fillers: effects on cuspal deflection
Auteurs : M. Andreasi Bassi [Italie] ; S. Serra [Italie] ; C. Andrisani [Italie] ; S. Lico [Italie] ; L. Baggi [Italie] ; D. Lauritano [Italie]Source :
- Oral & Implantology [ 1974-5648 ] ; 2017.
Abstract
The Authors analyzed the effect of spherical glass mega fillers (SGMF) on reducing contraction stress in dental composite resins, by means of a cavity model simulating the cuspal deflection which occurs on filled tooth cavity walls in clinical condition.
20 stylized MOD cavities (C-factor = 0.83) were performed in acrylic resin. The inner surface of each cavity was sand blasted and adhesively treated in order to ensure a valid bond with the composite resin. Three different diameter of SGMF were used (i.e. 1, 1,5, 2 mm). The samples were divided in 4 groups of 5 each: Group 1 samples filled with the composite only; Group 2 samples filled with composite added with SGMFs, Ø1mm (16 spheres for each sample); Group 3 samples filled with composite added with SGMFs, Ø1,5 mm (5 spheres for each sample); Group 4 samples filled with composite added with SGMFs, Ø2 mm (2 spheres for each sample). Digital pictures were taken, in standardized settings, before and immediately after the polymerization of the composite material, placed into the cavities. With a digital image analysis software the distances from the coronal reference points of the cavity walls were measured. Then the difference between the first and second measurement was calculated. The data were analyzed by means of the ANOVA test.
A significative reduction on cavity walls deflection, when the composite resin is used in addiction with the SGMFs was observed. The SGMFs of smallest diameter (1mm) showed the better outcome.
The SGMFs are reliable in reducing contraction stress in dental composite resins.
Url:
DOI: 10.11138/orl/2016.9.1S.071
PubMed: 28280535
PubMed Central: 5333744
Affiliations:
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<author><name sortKey="Baggi, L" sort="Baggi, L" uniqKey="Baggi L" first="L." last="Baggi">L. Baggi</name>
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<front><div type="abstract" xml:lang="en"><title>SUMMARY</title>
<sec><title>Purpose</title>
<p>The Authors analyzed the effect of spherical glass mega fillers (SGMF) on reducing contraction stress in dental composite resins, by means of a cavity model simulating the cuspal deflection which occurs on filled tooth cavity walls in clinical condition.</p>
</sec>
<sec><title>Materials and methods</title>
<p>20 stylized MOD cavities (C-factor = 0.83) were performed in acrylic resin. The inner surface of each cavity was sand blasted and adhesively treated in order to ensure a valid bond with the composite resin. Three different diameter of SGMF were used (i.e. 1, 1,5, 2 mm). The samples were divided in 4 groups of 5 each: Group 1 samples filled with the composite only; Group 2 samples filled with composite added with SGMFs, Ø1mm (16 spheres for each sample); Group 3 samples filled with composite added with SGMFs, Ø1,5 mm (5 spheres for each sample); Group 4 samples filled with composite added with SGMFs, Ø2 mm (2 spheres for each sample). Digital pictures were taken, in standardized settings, before and immediately after the polymerization of the composite material, placed into the cavities. With a digital image analysis software the distances from the coronal reference points of the cavity walls were measured. Then the difference between the first and second measurement was calculated. The data were analyzed by means of the ANOVA test.</p>
</sec>
<sec><title>Results</title>
<p>A significative reduction on cavity walls deflection, when the composite resin is used in addiction with the SGMFs was observed. The SGMFs of smallest diameter (1mm) showed the better outcome.</p>
</sec>
<sec><title>Conclusion</title>
<p>The SGMFs are reliable in reducing contraction stress in dental composite resins.</p>
</sec>
</div>
</front>
</TEI>
<pmc article-type="research-article"><pmc-comment>The publisher of this article does not allow downloading of the full text in XML form.</pmc-comment>
<front><journal-meta><journal-id journal-id-type="nlm-ta">Oral Implantol (Rome)</journal-id>
<journal-id journal-id-type="iso-abbrev">Oral Implantol (Rome)</journal-id>
<journal-id journal-id-type="publisher-id">OAI</journal-id>
<journal-title-group><journal-title>Oral & Implantology</journal-title>
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<issn pub-type="ppub">1974-5648</issn>
<issn pub-type="epub">2035-2468</issn>
<publisher><publisher-name>CIC Edizioni Internazionali</publisher-name>
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<article-meta><article-id pub-id-type="pmid">28280535</article-id>
<article-id pub-id-type="pmc">5333744</article-id>
<article-id pub-id-type="doi">10.11138/orl/2016.9.1S.071</article-id>
<article-id pub-id-type="publisher-id">71-79</article-id>
<article-categories><subj-group subj-group-type="heading"><subject>Original Research Article</subject>
</subj-group>
</article-categories>
<title-group><article-title>Polymerization shrinkage and spherical glass mega fillers: effects on cuspal deflection</article-title>
</title-group>
<contrib-group><contrib contrib-type="author"><name><surname>BASSI</surname>
<given-names>M. ANDREASI</given-names>
</name>
<xref ref-type="aff" rid="af1-71-79">1</xref>
</contrib>
<contrib contrib-type="author"><name><surname>SERRA</surname>
<given-names>S.</given-names>
</name>
<xref ref-type="aff" rid="af1-71-79">1</xref>
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<contrib contrib-type="author"><name><surname>ANDRISANI</surname>
<given-names>C.</given-names>
</name>
<xref ref-type="aff" rid="af2-71-79">2</xref>
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<contrib contrib-type="author"><name><surname>LICO</surname>
<given-names>S.</given-names>
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<xref ref-type="aff" rid="af3-71-79">3</xref>
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<contrib contrib-type="author"><name><surname>BAGGI</surname>
<given-names>L.</given-names>
</name>
<xref ref-type="aff" rid="af4-71-79">4</xref>
</contrib>
<contrib contrib-type="author"><name><surname>LAURITANO</surname>
<given-names>D.</given-names>
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<aff id="af1-71-79"><label>1</label>
Private practice in Rome, Italy</aff>
<aff id="af2-71-79"><label>2</label>
Private practice in Matera, Italy</aff>
<aff id="af3-71-79"><label>3</label>
Private practice in Olevano Romano (RM), Italy</aff>
<aff id="af4-71-79"><label>4</label>
Department of Clinical Sciences and Translational Medicine, University of Tor Vergata, Rome, Italy</aff>
<aff id="af5-71-79"><label>5</label>
Department of Medicine and Surgery, University of Milan-Bicocca, Milan, Italy</aff>
<author-notes><corresp id="c1-71-79">Correspondence to: Dorina Lauritano, Department of Medicine and Surgery, Center of Neurosciences of Milan, University of Milan-Bicocca, Via Cadore 48, 20052 Monza, Italy, Phone: +39.0392332301 - Fax: +39. 03923329892, E-mail: <email>dorina.lauritano@unimib.it</email>
</corresp>
</author-notes>
<pub-date pub-type="collection"><season>Jan-Mar</season>
<year>2016</year>
</pub-date>
<pub-date pub-type="epub"><day>14</day>
<month>2</month>
<year>2017</year>
</pub-date>
<volume>9</volume>
<issue>Suppl 1/2016 to N 4/2016</issue>
<fpage>71</fpage>
<lpage>79</lpage>
<permissions><copyright-statement>Copyright © 2016, CIC Edizioni Internazionali</copyright-statement>
<copyright-year>2016</copyright-year>
</permissions>
<abstract><title>SUMMARY</title>
<sec><title>Purpose</title>
<p>The Authors analyzed the effect of spherical glass mega fillers (SGMF) on reducing contraction stress in dental composite resins, by means of a cavity model simulating the cuspal deflection which occurs on filled tooth cavity walls in clinical condition.</p>
</sec>
<sec><title>Materials and methods</title>
<p>20 stylized MOD cavities (C-factor = 0.83) were performed in acrylic resin. The inner surface of each cavity was sand blasted and adhesively treated in order to ensure a valid bond with the composite resin. Three different diameter of SGMF were used (i.e. 1, 1,5, 2 mm). The samples were divided in 4 groups of 5 each: Group 1 samples filled with the composite only; Group 2 samples filled with composite added with SGMFs, Ø1mm (16 spheres for each sample); Group 3 samples filled with composite added with SGMFs, Ø1,5 mm (5 spheres for each sample); Group 4 samples filled with composite added with SGMFs, Ø2 mm (2 spheres for each sample). Digital pictures were taken, in standardized settings, before and immediately after the polymerization of the composite material, placed into the cavities. With a digital image analysis software the distances from the coronal reference points of the cavity walls were measured. Then the difference between the first and second measurement was calculated. The data were analyzed by means of the ANOVA test.</p>
</sec>
<sec><title>Results</title>
<p>A significative reduction on cavity walls deflection, when the composite resin is used in addiction with the SGMFs was observed. The SGMFs of smallest diameter (1mm) showed the better outcome.</p>
</sec>
<sec><title>Conclusion</title>
<p>The SGMFs are reliable in reducing contraction stress in dental composite resins.</p>
</sec>
</abstract>
<kwd-group><kwd>composite fillers</kwd>
<kwd>spherical glass mega fillers</kwd>
<kwd>polymerization shrinkage</kwd>
<kwd>composite shrinkage</kwd>
<kwd>cuspal deflection</kwd>
<kwd>enamel cracks</kwd>
<kwd>elastic modulus</kwd>
</kwd-group>
</article-meta>
</front>
</pmc>
<affiliations><list><country><li>Italie</li>
</country>
<region><li>Latium</li>
<li>Lombardie</li>
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<settlement><li>Milan</li>
<li>Rome</li>
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</list>
<tree><country name="Italie"><noRegion><name sortKey="Bassi, M Andreasi" sort="Bassi, M Andreasi" uniqKey="Bassi M" first="M. Andreasi" last="Bassi">M. Andreasi Bassi</name>
</noRegion>
<name sortKey="Andrisani, C" sort="Andrisani, C" uniqKey="Andrisani C" first="C." last="Andrisani">C. Andrisani</name>
<name sortKey="Baggi, L" sort="Baggi, L" uniqKey="Baggi L" first="L." last="Baggi">L. Baggi</name>
<name sortKey="Lauritano, D" sort="Lauritano, D" uniqKey="Lauritano D" first="D." last="Lauritano">D. Lauritano</name>
<name sortKey="Lico, S" sort="Lico, S" uniqKey="Lico S" first="S." last="Lico">S. Lico</name>
<name sortKey="Serra, S" sort="Serra, S" uniqKey="Serra S" first="S." last="Serra">S. Serra</name>
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