Effect of Pouring Time and Storage Temperature on Dimensional Stability of Casts Made from Irreversible Hydrocolloid
Identifieur interne : 003088 ( Pmc/Curation ); précédent : 003087; suivant : 003089Effect of Pouring Time and Storage Temperature on Dimensional Stability of Casts Made from Irreversible Hydrocolloid
Auteurs : M. Farzin [Iran] ; H. PanahandehSource :
- Journal of Dentistry (Tehran, Iran) [ 1735-2150 ] ; 2010.
Abstract
The aim of this study was to evaluate the dimensional stability of casts made from an alginate impression material poured immediately and stored after specific periods.
The common alginate used in Iran (Super; Iralgin, Golchai Co., Tehran, Iran) was tested. A master model was mounted on a special device and used to obtain the impressions. These impressions were stored at 23°C (SD=1) and 4°C (SD=1) in 100% relative humidity, then poured with gypsum immediately and again after 12, 25, 45 and 60 minutes. The casts were measured with a traveling microscope with the precision of 0.5 micrometer.
The dimensional stability of the alginate and impressions were both significantly time and temperature dependent. The impressions were dimensionally stable significantly until 12 minutes of storage at room temperature and until 45 minutes of storage at 4°C (SD=1).
The dimensional stability of the alginate impressions was influenced by the storage time and environment temperature, but a humid environment and 4°C (SD=1) temperature may delay the pouring.
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PubMed: 21998793
PubMed Central: 3184758
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H. Panahandeh<affiliation><nlm:aff id="af2-jod-7-4-179">Dentist, Private Practice</nlm:aff><wicri:noCountry code="subfield">Private Practice</wicri:noCountry></affiliation>Le document en format XML
<record><TEI><teiHeader><fileDesc><titleStmt><title xml:lang="en">Effect of Pouring Time and Storage Temperature on Dimensional Stability of Casts Made from Irreversible Hydrocolloid</title><author><name sortKey="Farzin, M" sort="Farzin, M" uniqKey="Farzin M" first="M." last="Farzin">M. Farzin</name><affiliation wicri:level="1"><nlm:aff id="af1-jod-7-4-179">Assistant Professor, Department of Prosthodontics, School of Dentistry, Shiraz University of Medical Sciences, Shiraz, Iran</nlm:aff><country xml:lang="fr">Iran</country><wicri:regionArea>Assistant Professor, Department of Prosthodontics, School of Dentistry, Shiraz University of Medical Sciences, Shiraz</wicri:regionArea></affiliation></author><author><name sortKey="Panahandeh, H" sort="Panahandeh, H" uniqKey="Panahandeh H" first="H." last="Panahandeh">H. Panahandeh</name><affiliation><nlm:aff id="af2-jod-7-4-179">Dentist, Private Practice</nlm:aff><wicri:noCountry code="subfield">Private Practice</wicri:noCountry></affiliation></author></titleStmt><publicationStmt><idno type="wicri:source">PMC</idno><idno type="pmid">21998793</idno><idno type="pmc">3184758</idno><idno type="url">http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3184758</idno><idno type="RBID">PMC:3184758</idno><date when="2010">2010</date><idno type="wicri:Area/Pmc/Corpus">003088</idno><idno type="wicri:explorRef" wicri:stream="Pmc" wicri:step="Corpus" wicri:corpus="PMC">003088</idno><idno type="wicri:Area/Pmc/Curation">003088</idno><idno type="wicri:explorRef" wicri:stream="Pmc" wicri:step="Curation">003088</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en" level="a" type="main">Effect of Pouring Time and Storage Temperature on Dimensional Stability of Casts Made from Irreversible Hydrocolloid</title><author><name sortKey="Farzin, M" sort="Farzin, M" uniqKey="Farzin M" first="M." last="Farzin">M. Farzin</name><affiliation wicri:level="1"><nlm:aff id="af1-jod-7-4-179">Assistant Professor, Department of Prosthodontics, School of Dentistry, Shiraz University of Medical Sciences, Shiraz, Iran</nlm:aff><country xml:lang="fr">Iran</country><wicri:regionArea>Assistant Professor, Department of Prosthodontics, School of Dentistry, Shiraz University of Medical Sciences, Shiraz</wicri:regionArea></affiliation></author><author><name sortKey="Panahandeh, H" sort="Panahandeh, H" uniqKey="Panahandeh H" first="H." last="Panahandeh">H. Panahandeh</name><affiliation><nlm:aff id="af2-jod-7-4-179">Dentist, Private Practice</nlm:aff><wicri:noCountry code="subfield">Private Practice</wicri:noCountry></affiliation></author></analytic><series><title level="j">Journal of Dentistry (Tehran, Iran)</title><idno type="ISSN">1735-2150</idno><idno type="eISSN">2008-2185</idno><imprint><date when="2010">2010</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en"><sec><title>Objective:</title><p>The aim of this study was to evaluate the dimensional stability of casts made from an alginate impression material poured immediately and stored after specific periods.</p></sec><sec><title>Materials and Methods:</title><p>The common alginate used in Iran (Super; Iralgin, Golchai Co., Tehran, Iran) was tested. A master model was mounted on a special device and used to obtain the impressions. These impressions were stored at 23°C (SD=1) and 4°C (SD=1) in 100% relative humidity, then poured with gypsum immediately and again after 12, 25, 45 and 60 minutes. The casts were measured with a traveling microscope with the precision of 0.5 micrometer.</p></sec><sec><title>Results:</title><p>The dimensional stability of the alginate and impressions were both significantly time and temperature dependent. The impressions were dimensionally stable significantly until 12 minutes of storage at room temperature and until 45 minutes of storage at 4°C (SD=1).</p></sec><sec><title>Conclusion:</title><p>The dimensional stability of the alginate impressions was influenced by the storage time and environment temperature, but a humid environment and 4°C (SD=1) temperature may delay the pouring.</p></sec></div></front><back><div1 type="bibliography"><listBibl><biblStruct><analytic><author><name sortKey="Jamani, Kd" uniqKey="Jamani K">KD Jamani</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Sawyer, Hf" uniqKey="Sawyer H">HF Sawyer</name></author><author><name sortKey="Sandrik, Jl" uniqKey="Sandrik J">JL Sandrik</name></author><author><name sortKey="Neiman, R" uniqKey="Neiman R">R Neiman</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Taylor, Rl" uniqKey="Taylor R">RL Taylor</name></author><author><name sortKey="Wright, Ps" 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Zarb</name></author><author><name sortKey="Bolender, Cl" uniqKey="Bolender C">CL Bolender</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Cohen, Bi" uniqKey="Cohen B">BI Cohen</name></author><author><name sortKey="Pagnillo, M" uniqKey="Pagnillo M">M Pagnillo</name></author><author><name sortKey="Deutsch, As" uniqKey="Deutsch A">AS Deutsch</name></author><author><name sortKey="Musikant, Bl" uniqKey="Musikant B">BL Musikant</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Vojdani, M" uniqKey="Vojdani M">M Vojdani</name></author><author><name sortKey="Derafshi, R" uniqKey="Derafshi R">R Derafshi</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Peters, Mc" uniqKey="Peters M">MC Peters</name></author><author><name sortKey="Tieleman, A" uniqKey="Tieleman A">A Tieleman</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Rudd, Rw" uniqKey="Rudd R">RW 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<front><journal-meta><journal-id journal-id-type="nlm-ta">J Dent (Tehran)</journal-id><journal-id journal-id-type="publisher-id">JDT</journal-id><journal-title-group><journal-title>Journal of Dentistry (Tehran, Iran)</journal-title></journal-title-group><issn pub-type="ppub">1735-2150</issn><issn pub-type="epub">2008-2185</issn><publisher><publisher-name>Tehran University of Medical Sciences</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="pmid">21998793</article-id><article-id pub-id-type="pmc">3184758</article-id><article-id pub-id-type="publisher-id">jod-7-179</article-id><article-categories><subj-group subj-group-type="heading"><subject>Original Article</subject></subj-group></article-categories><title-group><article-title>Effect of Pouring Time and Storage Temperature on Dimensional Stability of Casts Made from Irreversible Hydrocolloid</article-title></title-group><contrib-group><contrib contrib-type="author"><name><surname>Farzin</surname><given-names>M.</given-names></name><xref ref-type="aff" rid="af1-jod-7-4-179"><sup>1</sup></xref><xref ref-type="corresp" rid="c1-jod-7-4-179"></xref></contrib><contrib contrib-type="author"><name><surname>Panahandeh</surname><given-names>H.</given-names></name><xref ref-type="aff" rid="af2-jod-7-4-179"><sup>2</sup></xref></contrib></contrib-group><aff id="af1-jod-7-4-179"><label>1</label>Assistant Professor, Department of Prosthodontics, School of Dentistry, Shiraz University of Medical Sciences, Shiraz, Iran</aff><aff id="af2-jod-7-4-179"><label>2</label>Dentist, Private Practice</aff><author-notes><corresp id="c1-jod-7-4-179">Corresponding author: M. Farzin, Department of Prosthodontics, School of Dentistry, Shiraz University of Medical Sciences, Shiraz, Iran. <email>farzinmitra@yahoo.com</email></corresp></author-notes><pub-date pub-type="collection"><year>2010</year></pub-date><pub-date pub-type="epub"><day>30</day><month>9</month><year>2010</year></pub-date><pub-date pub-type="ppub"><season>Autumn</season><year>2010</year></pub-date><volume>7</volume><issue>4</issue><fpage>179</fpage><lpage>184</lpage><history><date date-type="received"><day>28</day><month>2</month><year>2010</year></date><date date-type="accepted"><day>1</day><month>6</month><year>2010</year></date></history><permissions><copyright-statement>Copyright © Dental Research Center, Tehran University of Medical Sciences</copyright-statement><copyright-year>2010</copyright-year><license license-type="open-access" xlink:href="http://creativecommons.org/licenses/by-nc/3.0/"><license-p>This is an open-access article distributed under the terms of the Creative Commons Attribution NonCommercial 3.0 License (CC BY-NC 3.0), which allows users to read, copy, distribute and make derivative works for non-commercial purposes from the material, as long as the author of the original work is cited properly.</license-p></license></permissions><abstract><sec><title>Objective:</title><p>The aim of this study was to evaluate the dimensional stability of casts made from an alginate impression material poured immediately and stored after specific periods.</p></sec><sec><title>Materials and Methods:</title><p>The common alginate used in Iran (Super; Iralgin, Golchai Co., Tehran, Iran) was tested. A master model was mounted on a special device and used to obtain the impressions. These impressions were stored at 23°C (SD=1) and 4°C (SD=1) in 100% relative humidity, then poured with gypsum immediately and again after 12, 25, 45 and 60 minutes. The casts were measured with a traveling microscope with the precision of 0.5 micrometer.</p></sec><sec><title>Results:</title><p>The dimensional stability of the alginate and impressions were both significantly time and temperature dependent. The impressions were dimensionally stable significantly until 12 minutes of storage at room temperature and until 45 minutes of storage at 4°C (SD=1).</p></sec><sec><title>Conclusion:</title><p>The dimensional stability of the alginate impressions was influenced by the storage time and environment temperature, but a humid environment and 4°C (SD=1) temperature may delay the pouring.</p></sec></abstract><kwd-group><kwd>Alginates</kwd><kwd>Dental</kwd><kwd>Impression Materials</kwd><kwd>Hydrocolloid</kwd></kwd-group></article-meta></front><floats-group><fig id="f1-jod-7-4-179" position="float"><label>Fig 1</label><caption><p>The base and the maxillary dentiform</p></caption><graphic xlink:href="jod-7-179f1"></graphic></fig><fig id="f2-jod-7-4-179" position="float"><label>Fig 2</label><caption><p>A metal perforated tray.</p></caption><graphic xlink:href="jod-7-179f2"></graphic></fig><fig id="f3-jod-7-4-179" position="float"><label>Fig 3</label><caption><p>On each cast, three dies were present. Two measurements (μm) including the anterior-posterior (AP) dimension, and the cross arch (CA) dimension were recorded.</p></caption><graphic xlink:href="jod-7-179f3"></graphic></fig><table-wrap id="t1-jod-7-4-179" position="float"><label>Table 1</label><caption><p>The mean valves and standard deviation of measurements for stone casts made of irreversible hydrocolloid impressions stored in 4°C, 23°C and purred with gypsum stone at interval times.</p></caption><table frame="hsides" rules="groups"><thead><tr><th align="center" valign="middle" rowspan="1" colspan="1"><bold>Group /Dimension</bold></th><th align="center" valign="middle" rowspan="1" colspan="1"><bold>Duration</bold></th><th align="center" valign="middle" rowspan="1" colspan="1"><bold>Mean (μm)</bold></th><th align="center" valign="middle" rowspan="1" colspan="1"><bold>Mean of Absolute value of errors (μm)</bold></th><th align="center" valign="middle" rowspan="1" colspan="1"><bold>Standard Deviation</bold></th></tr></thead><tbody><tr><td align="center" valign="middle" rowspan="5" colspan="1"><bold>A(4°C, SD=1) / AP dimension</bold></td><td align="center" valign="middle" rowspan="1" colspan="1">0</td><td align="center" valign="middle" rowspan="1" colspan="1">48.9613</td><td align="center" valign="middle" rowspan="1" colspan="1">0.0071</td><td align="center" valign="middle" rowspan="1" colspan="1">0.05643</td></tr><tr><td align="center" valign="middle" rowspan="1" colspan="1">12</td><td align="center" valign="middle" rowspan="1" colspan="1">48.9750</td><td align="center" valign="middle" rowspan="1" colspan="1">0.0064</td><td align="center" valign="middle" rowspan="1" colspan="1">0.08718</td></tr><tr><td align="center" valign="middle" rowspan="1" colspan="1">25</td><td align="center" valign="middle" rowspan="1" colspan="1">49.0088</td><td align="center" valign="middle" rowspan="1" colspan="1">0.0103</td><td align="center" valign="middle" rowspan="1" colspan="1">0.05842</td></tr><tr><td align="center" valign="middle" rowspan="1" colspan="1">45</td><td align="center" valign="middle" rowspan="1" colspan="1">49.0100</td><td align="center" valign="middle" rowspan="1" colspan="1">0.0144</td><td align="center" valign="middle" rowspan="1" colspan="1">0.06481</td></tr><tr><td align="center" valign="middle" rowspan="1" colspan="1">60</td><td align="center" valign="middle" rowspan="1" colspan="1">49.0665</td><td align="center" valign="middle" rowspan="1" colspan="1">0.0814</td><td align="center" valign="middle" rowspan="1" colspan="1">0.07572</td></tr><tr><td align="center" valign="middle" rowspan="5" colspan="1"><bold>A(4°C, SD=1) / CA dimension</bold></td><td align="center" valign="middle" rowspan="1" colspan="1">0</td><td align="center" valign="middle" rowspan="1" colspan="1">35.9075</td><td align="center" valign="middle" rowspan="1" colspan="1">0.0125</td><td align="center" valign="middle" rowspan="1" colspan="1">0.03576</td></tr><tr><td align="center" valign="middle" rowspan="1" colspan="1">12</td><td align="center" valign="middle" rowspan="1" colspan="1">35.9038</td><td align="center" valign="middle" rowspan="1" colspan="1">0.0057</td><td align="center" valign="middle" rowspan="1" colspan="1">0.04406</td></tr><tr><td align="center" valign="middle" rowspan="1" colspan="1">25</td><td align="center" valign="middle" rowspan="1" colspan="1">35.8988</td><td align="center" valign="middle" rowspan="1" colspan="1">0.0015</td><td align="center" valign="middle" rowspan="1" colspan="1">0.05249</td></tr><tr><td align="center" valign="middle" rowspan="1" colspan="1">45</td><td align="center" valign="middle" rowspan="1" colspan="1">35.8813</td><td align="center" valign="middle" rowspan="1" colspan="1">0.0094</td><td align="center" valign="middle" rowspan="1" colspan="1">0.05194</td></tr><tr><td align="center" valign="middle" rowspan="1" colspan="1">60</td><td align="center" valign="middle" rowspan="1" colspan="1">35.8661</td><td align="center" valign="middle" rowspan="1" colspan="1">0.0427</td><td align="center" valign="middle" rowspan="1" colspan="1">0.06968</td></tr><tr><td align="center" valign="middle" rowspan="5" colspan="1"><bold>B(23°C, SD=1) / AP dimension</bold></td><td align="center" valign="middle" rowspan="1" colspan="1">0</td><td align="center" valign="middle" rowspan="1" colspan="1">48.9613</td><td align="center" valign="middle" rowspan="1" colspan="1">0.0457</td><td align="center" valign="middle" rowspan="1" colspan="1">0.04039</td></tr><tr><td align="center" valign="middle" rowspan="1" colspan="1">12</td><td align="center" valign="middle" rowspan="1" colspan="1">49.0050</td><td align="center" valign="middle" rowspan="1" colspan="1">0.0079</td><td align="center" valign="middle" rowspan="1" colspan="1">0.03024</td></tr><tr><td align="center" valign="middle" rowspan="1" colspan="1">25</td><td align="center" valign="middle" rowspan="1" colspan="1">49.0500</td><td align="center" valign="middle" rowspan="1" colspan="1">0.0081</td><td align="center" valign="middle" rowspan="1" colspan="1">0.05657</td></tr><tr><td align="center" valign="middle" rowspan="1" colspan="1">45</td><td align="center" valign="middle" rowspan="1" colspan="1">49.0900</td><td align="center" valign="middle" rowspan="1" colspan="1">0.001</td><td align="center" valign="middle" rowspan="1" colspan="1">0.04629</td></tr><tr><td align="center" valign="middle" rowspan="1" colspan="1">60</td><td align="center" valign="middle" rowspan="1" colspan="1">49.1263</td><td align="center" valign="middle" rowspan="1" colspan="1">0.0417</td><td align="center" valign="middle" rowspan="1" colspan="1">0.06802</td></tr><tr><td align="center" valign="middle" rowspan="5" colspan="1"><bold>B(23°C, SD=1) / CA dimension</bold></td><td align="center" valign="middle" rowspan="1" colspan="1">0</td><td align="center" valign="middle" rowspan="1" colspan="1">35.9075</td><td align="center" valign="middle" rowspan="1" colspan="1">0.0099</td><td align="center" valign="middle" rowspan="1" colspan="1">0.03576</td></tr><tr><td align="center" valign="middle" rowspan="1" colspan="1">12</td><td align="center" valign="middle" rowspan="1" colspan="1">35.9034</td><td align="center" valign="middle" rowspan="1" colspan="1">0.0049</td><td align="center" valign="middle" rowspan="1" colspan="1">0.06803</td></tr><tr><td align="center" valign="middle" rowspan="1" colspan="1">25</td><td align="center" valign="middle" rowspan="1" colspan="1">35.9029</td><td align="center" valign="middle" rowspan="1" colspan="1">0.051</td><td align="center" valign="middle" rowspan="1" colspan="1">0.07019</td></tr><tr><td align="center" valign="middle" rowspan="1" colspan="1">45</td><td align="center" valign="middle" rowspan="1" colspan="1">35.9025</td><td align="center" valign="middle" rowspan="1" colspan="1">0.0058</td><td align="center" valign="middle" rowspan="1" colspan="1">0.01282</td></tr><tr><td align="center" valign="middle" rowspan="1" colspan="1">60</td><td align="center" valign="middle" rowspan="1" colspan="1">35.9000</td><td align="center" valign="middle" rowspan="1" colspan="1">0.0027</td><td align="center" valign="middle" rowspan="1" colspan="1">0.03732</td></tr></tbody></table></table-wrap><table-wrap id="t2-jod-7-4-179" position="float"><label>Table 2</label><caption><p>P-values of Dunnett test for dimensional changes of AP and CA distance (μm) compared with the control group.</p></caption><table frame="hsides" rules="groups"><thead><tr><th align="center" valign="middle" rowspan="2" colspan="1"><bold>Duration</bold></th><th colspan="4" align="center" valign="middle" rowspan="1"><bold>Dimension</bold><hr></hr></th></tr><tr><th align="center" valign="middle" rowspan="1" colspan="1"><bold>AP (4°C)</bold></th><th align="center" valign="middle" rowspan="1" colspan="1"><bold>CA (4°C)</bold></th><th align="center" valign="middle" rowspan="1" colspan="1"><bold>AP (23°C)</bold></th><th align="center" valign="middle" rowspan="1" colspan="1"><bold>CA (23°C)</bold></th></tr></thead><tbody><tr><td align="center" valign="top" rowspan="1" colspan="1"><bold>12</bold></td><td align="center" valign="top" rowspan="1" colspan="1">0.984</td><td align="center" valign="top" rowspan="1" colspan="1">0.890</td><td align="center" valign="top" rowspan="1" colspan="1">0.302</td><td align="center" valign="top" rowspan="1" colspan="1">0.686</td></tr><tr><td align="center" valign="top" rowspan="1" colspan="1"><bold>25</bold></td><td align="center" valign="top" rowspan="1" colspan="1">0.461</td><td align="center" valign="top" rowspan="1" colspan="1">0.785</td><td align="center" valign="top" rowspan="1" colspan="1"><sup><xref ref-type="table-fn" rid="tfn1-jod-7-4-179">*</xref></sup>0.007</td><td align="center" valign="top" rowspan="1" colspan="1">0.800</td></tr><tr><td align="center" valign="top" rowspan="1" colspan="1"><bold>45</bold></td><td align="center" valign="top" rowspan="1" colspan="1">0.438</td><td align="center" valign="top" rowspan="1" colspan="1">0.356</td><td align="center" valign="top" rowspan="1" colspan="1"><sup><xref ref-type="table-fn" rid="tfn1-jod-7-4-179">*</xref></sup>0.000</td><td align="center" valign="top" rowspan="1" colspan="1">0.895</td></tr><tr><td align="center" valign="top" rowspan="1" colspan="1"><bold>60</bold></td><td align="center" valign="top" rowspan="1" colspan="1"><sup><xref ref-type="table-fn" rid="tfn1-jod-7-4-179">*</xref></sup>0.015</td><td align="center" valign="top" rowspan="1" colspan="1">0.439</td><td align="center" valign="top" rowspan="1" colspan="1"><sup><xref ref-type="table-fn" rid="tfn1-jod-7-4-179">*</xref></sup>0.000</td><td align="center" valign="top" rowspan="1" colspan="1">0.973</td></tr></tbody></table><table-wrap-foot><fn id="tfn1-jod-7-4-179"><label>*</label><p>The measurement is statistically significant compared with the control group 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