Effect of tightening torque on the marginal adaptation of cement-retained implant-supported fixed dental prostheses
Identifieur interne : 000E45 ( Pmc/Checkpoint ); précédent : 000E44; suivant : 000E46Effect of tightening torque on the marginal adaptation of cement-retained implant-supported fixed dental prostheses
Auteurs : Jalil Ghanbarzadeh [Iran] ; Hossin Dashti [Iran] ; Reza Karamad [Iran] ; Marzieh Alikhasi [Iran] ; Mohammadreza Nakhaei [Iran]Source :
- Dental Research Journal [ 1735-3327 ] ; 2015.
Abstract
The final position of the abutment changes with the amount of tightening torque. This could eventually lead to loss of passivity and marginal misfit of prostheses. The aim of this study was to evaluate the effect of three different tightening torques on the marginal adaptation of 3-unit cement-retained implant-supported fixed dental prostheses (FDPs).
Two implants (Straumann) were inserted in an acrylic block so that one of the implants was placed vertically and the other at a 15° vertical angle. A straight abutment and a 15° angulated abutment were connected to the vertically and obliquely installed implants, respectively, so that the two abutments were parallel. Then, 10 cement-retained FDPs were waxed and cast. Abutments were tightened with 10, 20, and 35 Ncm torques, respectively. Following each tightening torque, FDPs were luted on respective abutments with temporary cement. The marginal adaptation of the retainers was evaluated using stereomicroscope. FDPs were then removed from the abutments and were sectioned at the connector sites. The retainers were luted again on their respective abutments. Luting procedures and marginal adaptation measurement were repeated. Data were analyzed by ANOVA and least significant difference tests (α = 0.05). After cutting the FDP connectors, the independent samples
Following 10, 20, and 35 Ncm tightening torques, the marginal discrepancy of the retainers of FDPs significantly increased (
Within the limitations of this study, the marginal misfit of cement-retained FDPs increased continuously when the tightening torque increased. After cutting the connectors, the marginal misfit of the ANRs was higher than those of the straight abutment retainers.
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DOI: 10.4103/1735-3327.161458
PubMed: 26288627
PubMed Central: 4533195
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<record><TEI><teiHeader><fileDesc><titleStmt><title xml:lang="en">Effect of tightening torque on the marginal adaptation of cement-retained implant-supported fixed dental prostheses</title><author><name sortKey="Ghanbarzadeh, Jalil" sort="Ghanbarzadeh, Jalil" uniqKey="Ghanbarzadeh J" first="Jalil" last="Ghanbarzadeh">Jalil Ghanbarzadeh</name><affiliation wicri:level="1"><nlm:aff id="aff1">Department of Prosthodontics, School of Dentistry, Mashhad University of Medical Sciences, Mashhad, Iran</nlm:aff><country xml:lang="fr">Iran</country><wicri:regionArea>Department of Prosthodontics, School of Dentistry, Mashhad University of Medical Sciences, Mashhad</wicri:regionArea><wicri:noRegion>Mashhad</wicri:noRegion></affiliation></author><author><name sortKey="Dashti, Hossin" sort="Dashti, Hossin" uniqKey="Dashti H" first="Hossin" last="Dashti">Hossin Dashti</name><affiliation wicri:level="1"><nlm:aff id="aff1">Department of Prosthodontics, School of Dentistry, Mashhad University of Medical Sciences, Mashhad, Iran</nlm:aff><country xml:lang="fr">Iran</country><wicri:regionArea>Department of Prosthodontics, School of Dentistry, Mashhad University of Medical Sciences, Mashhad</wicri:regionArea><wicri:noRegion>Mashhad</wicri:noRegion></affiliation></author><author><name sortKey="Karamad, Reza" sort="Karamad, Reza" uniqKey="Karamad R" first="Reza" last="Karamad">Reza Karamad</name><affiliation wicri:level="1"><nlm:aff id="aff1">Department of Prosthodontics, School of Dentistry, Mashhad University of Medical Sciences, Mashhad, Iran</nlm:aff><country xml:lang="fr">Iran</country><wicri:regionArea>Department of Prosthodontics, School of Dentistry, Mashhad University of Medical Sciences, Mashhad</wicri:regionArea><wicri:noRegion>Mashhad</wicri:noRegion></affiliation></author><author><name sortKey="Alikhasi, Marzieh" sort="Alikhasi, Marzieh" uniqKey="Alikhasi M" first="Marzieh" last="Alikhasi">Marzieh Alikhasi</name><affiliation wicri:level="1"><nlm:aff id="aff2">Department of Prosthodontics and Implant, Dental Research Center, School of Dentistry, Tehran University of Medical Sciences, Tehran, Iran</nlm:aff><country xml:lang="fr">Iran</country><wicri:regionArea>Department of Prosthodontics and Implant, Dental Research Center, School of Dentistry, Tehran University of Medical Sciences, Tehran</wicri:regionArea><wicri:noRegion>Tehran</wicri:noRegion></affiliation></author><author><name sortKey="Nakhaei, Mohammadreza" sort="Nakhaei, Mohammadreza" uniqKey="Nakhaei M" first="Mohammadreza" last="Nakhaei">Mohammadreza Nakhaei</name><affiliation wicri:level="1"><nlm:aff id="aff1">Department of Prosthodontics, School of Dentistry, Mashhad University of Medical Sciences, Mashhad, Iran</nlm:aff><country xml:lang="fr">Iran</country><wicri:regionArea>Department of Prosthodontics, School of Dentistry, Mashhad University of Medical Sciences, Mashhad</wicri:regionArea><wicri:noRegion>Mashhad</wicri:noRegion></affiliation></author></titleStmt><publicationStmt><idno type="wicri:source">PMC</idno><idno type="pmid">26288627</idno><idno type="pmc">4533195</idno><idno type="url">http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4533195</idno><idno type="RBID">PMC:4533195</idno><idno type="doi">10.4103/1735-3327.161458</idno><date when="2015">2015</date><idno type="wicri:Area/Pmc/Corpus">000275</idno><idno type="wicri:explorRef" wicri:stream="Pmc" wicri:step="Corpus" wicri:corpus="PMC">000275</idno><idno type="wicri:Area/Pmc/Curation">000275</idno><idno type="wicri:explorRef" wicri:stream="Pmc" wicri:step="Curation">000275</idno><idno type="wicri:Area/Pmc/Checkpoint">000E45</idno><idno type="wicri:explorRef" wicri:stream="Pmc" wicri:step="Checkpoint">000E45</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en" level="a" type="main">Effect of tightening torque on the marginal adaptation of cement-retained implant-supported fixed dental prostheses</title><author><name sortKey="Ghanbarzadeh, Jalil" sort="Ghanbarzadeh, Jalil" uniqKey="Ghanbarzadeh J" first="Jalil" last="Ghanbarzadeh">Jalil Ghanbarzadeh</name><affiliation wicri:level="1"><nlm:aff id="aff1">Department of Prosthodontics, School of Dentistry, Mashhad University of Medical Sciences, Mashhad, Iran</nlm:aff><country xml:lang="fr">Iran</country><wicri:regionArea>Department of Prosthodontics, School of Dentistry, Mashhad University of Medical Sciences, Mashhad</wicri:regionArea><wicri:noRegion>Mashhad</wicri:noRegion></affiliation></author><author><name sortKey="Dashti, Hossin" sort="Dashti, Hossin" uniqKey="Dashti H" first="Hossin" last="Dashti">Hossin Dashti</name><affiliation wicri:level="1"><nlm:aff id="aff1">Department of Prosthodontics, School of Dentistry, Mashhad University of Medical Sciences, Mashhad, Iran</nlm:aff><country xml:lang="fr">Iran</country><wicri:regionArea>Department of Prosthodontics, School of Dentistry, Mashhad University of Medical Sciences, Mashhad</wicri:regionArea><wicri:noRegion>Mashhad</wicri:noRegion></affiliation></author><author><name sortKey="Karamad, Reza" sort="Karamad, Reza" uniqKey="Karamad R" first="Reza" last="Karamad">Reza Karamad</name><affiliation wicri:level="1"><nlm:aff id="aff1">Department of Prosthodontics, School of Dentistry, Mashhad University of Medical Sciences, Mashhad, Iran</nlm:aff><country xml:lang="fr">Iran</country><wicri:regionArea>Department of Prosthodontics, School of Dentistry, Mashhad University of Medical Sciences, Mashhad</wicri:regionArea><wicri:noRegion>Mashhad</wicri:noRegion></affiliation></author><author><name sortKey="Alikhasi, Marzieh" sort="Alikhasi, Marzieh" uniqKey="Alikhasi M" first="Marzieh" last="Alikhasi">Marzieh Alikhasi</name><affiliation wicri:level="1"><nlm:aff id="aff2">Department of Prosthodontics and Implant, Dental Research Center, School of Dentistry, Tehran University of Medical Sciences, Tehran, Iran</nlm:aff><country xml:lang="fr">Iran</country><wicri:regionArea>Department of Prosthodontics and Implant, Dental Research Center, School of Dentistry, Tehran University of Medical Sciences, Tehran</wicri:regionArea><wicri:noRegion>Tehran</wicri:noRegion></affiliation></author><author><name sortKey="Nakhaei, Mohammadreza" sort="Nakhaei, Mohammadreza" uniqKey="Nakhaei M" first="Mohammadreza" last="Nakhaei">Mohammadreza Nakhaei</name><affiliation wicri:level="1"><nlm:aff id="aff1">Department of Prosthodontics, School of Dentistry, Mashhad University of Medical Sciences, Mashhad, Iran</nlm:aff><country xml:lang="fr">Iran</country><wicri:regionArea>Department of Prosthodontics, School of Dentistry, Mashhad University of Medical Sciences, Mashhad</wicri:regionArea><wicri:noRegion>Mashhad</wicri:noRegion></affiliation></author></analytic><series><title level="j">Dental Research Journal</title><idno type="ISSN">1735-3327</idno><idno type="eISSN">2008-0255</idno><imprint><date when="2015">2015</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en"><sec id="st1"><title>Background:</title><p>The final position of the abutment changes with the amount of tightening torque. This could eventually lead to loss of passivity and marginal misfit of prostheses. The aim of this study was to evaluate the effect of three different tightening torques on the marginal adaptation of 3-unit cement-retained implant-supported fixed dental prostheses (FDPs).</p></sec><sec id="st2"><title>Materials and Methods:</title><p>Two implants (Straumann) were inserted in an acrylic block so that one of the implants was placed vertically and the other at a 15° vertical angle. A straight abutment and a 15° angulated abutment were connected to the vertically and obliquely installed implants, respectively, so that the two abutments were parallel. Then, 10 cement-retained FDPs were waxed and cast. Abutments were tightened with 10, 20, and 35 Ncm torques, respectively. Following each tightening torque, FDPs were luted on respective abutments with temporary cement. The marginal adaptation of the retainers was evaluated using stereomicroscope. FDPs were then removed from the abutments and were sectioned at the connector sites. The retainers were luted again on their respective abutments. Luting procedures and marginal adaptation measurement were repeated. Data were analyzed by ANOVA and least significant difference tests (α = 0.05). After cutting the FDP connectors, the independent samples <italic>t</italic>-test was used to compare misfit values (α = 0.05).</p></sec><sec id="st3"><title>Results:</title><p>Following 10, 20, and 35 Ncm tightening torques, the marginal discrepancy of the retainers of FDPs significantly increased (<italic>P</italic> < 0.05). There was no significant difference between the marginal discrepancies of these two retainers (<italic>P</italic> > 0.05). The marginal gap values of angulated abutment retainers (ANRs) were significantly higher than those of the straight abutment after cutting the connectors (<italic>P</italic> = 0.026).</p></sec><sec id="st4"><title>Conclusion:</title><p>Within the limitations of this study, the marginal misfit of cement-retained FDPs increased continuously when the tightening torque increased. After cutting the connectors, the marginal misfit of the ANRs was higher than those of the straight abutment retainers.</p></sec></div></front><back><div1 type="bibliography"><listBibl><biblStruct><analytic><author><name sortKey="Schwarz, Ms" uniqKey="Schwarz M">MS Schwarz</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Binon, Pp" uniqKey="Binon P">PP Binon</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Scacchi, M" uniqKey="Scacchi M">M Scacchi</name></author><author><name sortKey="Merz, Br" uniqKey="Merz B">BR Merz</name></author><author><name sortKey="Sch R, Ar" uniqKey="Sch R A">AR Schär</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Merz, Br" uniqKey="Merz B">BR Merz</name></author><author><name sortKey="Hunenbart, S" uniqKey="Hunenbart S">S Hunenbart</name></author><author><name sortKey="Belser, Uc" uniqKey="Belser U">UC Belser</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Norton, Mr" uniqKey="Norton M">MR Norton</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Khraisat, A" uniqKey="Khraisat A">A Khraisat</name></author><author><name sortKey="Stegaroiu, R" uniqKey="Stegaroiu R">R Stegaroiu</name></author><author><name sortKey="Nomura, S" uniqKey="Nomura S">S Nomura</name></author><author><name sortKey="Miyakawa, O" uniqKey="Miyakawa O">O Miyakawa</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Maeda, Y" uniqKey="Maeda Y">Y Maeda</name></author><author><name sortKey="Satoh, T" uniqKey="Satoh T">T Satoh</name></author><author><name sortKey="Sogo, M" uniqKey="Sogo M">M Sogo</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Kim, Ks" uniqKey="Kim K">KS Kim</name></author><author><name sortKey="Lim, Yj" uniqKey="Lim Y">YJ Lim</name></author><author><name sortKey="Kim, Mj" uniqKey="Kim M">MJ Kim</name></author><author><name sortKey="Kwon, Hb" uniqKey="Kwon H">HB Kwon</name></author><author><name sortKey="Yang, Jh" uniqKey="Yang J">JH Yang</name></author><author><name sortKey="Lee, Jb" uniqKey="Lee J">JB Lee</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Dailey, B" uniqKey="Dailey B">B Dailey</name></author><author><name sortKey="Jordan, L" uniqKey="Jordan L">L Jordan</name></author><author><name sortKey="Blind, O" uniqKey="Blind O">O Blind</name></author><author><name sortKey="Tavernier, B" uniqKey="Tavernier B">B Tavernier</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Lee, Jh" uniqKey="Lee J">JH Lee</name></author><author><name sortKey="Kim, Dg" uniqKey="Kim D">DG Kim</name></author><author><name sortKey="Park, Cj" uniqKey="Park C">CJ Park</name></author><author><name sortKey="Cho, Lr" uniqKey="Cho L">LR Cho</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Norton, Mr" uniqKey="Norton M">MR Norton</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Nicoll, Rj" uniqKey="Nicoll R">RJ Nicoll</name></author><author><name sortKey="Sun, A" uniqKey="Sun A">A Sun</name></author><author><name sortKey="Haney, S" uniqKey="Haney S">S Haney</name></author><author><name sortKey="Turkyilmaz, I" uniqKey="Turkyilmaz I">I Turkyilmaz</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Semper, W" uniqKey="Semper W">W Semper</name></author><author><name sortKey="Kraft, S" uniqKey="Kraft S">S Kraft</name></author><author><name sortKey="Mehrhof, J" uniqKey="Mehrhof J">J Mehrhof</name></author><author><name sortKey="Nelson, K" uniqKey="Nelson K">K Nelson</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Semper, W" uniqKey="Semper W">W Semper</name></author><author><name sortKey="Kraft, S" uniqKey="Kraft S">S Kraft</name></author><author><name sortKey="Kruger, T" uniqKey="Kruger T">T Krüger</name></author><author><name sortKey="Nelson, K" uniqKey="Nelson K">K Nelson</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Semper, W" uniqKey="Semper W">W Semper</name></author><author><name sortKey="Kraft, S" uniqKey="Kraft S">S Kraft</name></author><author><name sortKey="Kruger, T" uniqKey="Kruger T">T Krüger</name></author><author><name sortKey="Nelson, K" uniqKey="Nelson K">K Nelson</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Semper Hogg, W" uniqKey="Semper Hogg W">W Semper-Hogg</name></author><author><name sortKey="Kraft, S" uniqKey="Kraft S">S Kraft</name></author><author><name sortKey="Stiller, S" uniqKey="Stiller S">S Stiller</name></author><author><name sortKey="Mehrhof, J" uniqKey="Mehrhof J">J Mehrhof</name></author><author><name sortKey="Nelson, K" uniqKey="Nelson K">K Nelson</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Lang, La" uniqKey="Lang L">LA Lang</name></author><author><name sortKey="Sierraalta, M" uniqKey="Sierraalta M">M Sierraalta</name></author><author><name sortKey="Hoffensperger, M" uniqKey="Hoffensperger M">M Hoffensperger</name></author><author><name sortKey="Wang, Rf" uniqKey="Wang R">RF Wang</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Dellinges, Ma" uniqKey="Dellinges M">MA Dellinges</name></author><author><name sortKey="Tebrock, Oc" uniqKey="Tebrock O">OC Tebrock</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Semper, W" uniqKey="Semper W">W Semper</name></author><author><name sortKey="Heberer, S" uniqKey="Heberer S">S Heberer</name></author><author><name sortKey="Mehrhof, J" uniqKey="Mehrhof J">J Mehrhof</name></author><author><name sortKey="Schink, T" uniqKey="Schink T">T Schink</name></author><author><name sortKey="Nelson, K" uniqKey="Nelson K">K Nelson</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Jemt, T" uniqKey="Jemt T">T Jemt</name></author><author><name sortKey="Book, K" uniqKey="Book K">K Book</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Pietrabissa, R" uniqKey="Pietrabissa R">R Pietrabissa</name></author><author><name sortKey="Gionso, L" uniqKey="Gionso L">L Gionso</name></author><author><name sortKey="Quaglini, V" uniqKey="Quaglini V">V Quaglini</name></author><author><name sortKey="Di Martino, E" uniqKey="Di Martino E">E Di Martino</name></author><author><name sortKey="Simion, M" uniqKey="Simion M">M Simion</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Guindy, Js" uniqKey="Guindy J">JS Guindy</name></author><author><name sortKey="Schiel, H" uniqKey="Schiel H">H Schiel</name></author><author><name sortKey="Schmidli, F" uniqKey="Schmidli F">F Schmidli</name></author><author><name sortKey="Wirz, J" uniqKey="Wirz J">J Wirz</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Quirynen, M" uniqKey="Quirynen M">M Quirynen</name></author><author><name sortKey="Bollen, Cm" uniqKey="Bollen C">CM Bollen</name></author><author><name sortKey="Eyssen, H" uniqKey="Eyssen H">H Eyssen</name></author><author><name sortKey="Van Steenberghe, D" uniqKey="Van Steenberghe D">D van Steenberghe</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Misch, Ce" uniqKey="Misch C">CE Misch</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Guichet, Dl" uniqKey="Guichet D">DL Guichet</name></author><author><name sortKey="Caputo, Aa" uniqKey="Caputo A">AA Caputo</name></author><author><name sortKey="Choi, H" uniqKey="Choi H">H Choi</name></author><author><name sortKey="Sorensen, Ja" uniqKey="Sorensen J">JA Sorensen</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Siadat, H" uniqKey="Siadat H">H Siadat</name></author><author><name sortKey="Alikhasi, M" uniqKey="Alikhasi M">M Alikhasi</name></author><author><name sortKey="Mirfazaelian, A" uniqKey="Mirfazaelian A">A Mirfazaelian</name></author><author><name sortKey="Zade, Mm" uniqKey="Zade M">MM Zade</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Oyague, Rc" uniqKey="Oyague R">RC Oyagüe</name></author><author><name sortKey="Turri N, As" uniqKey="Turri N A">AS Turrión</name></author><author><name sortKey="Toledano, M" uniqKey="Toledano M">M Toledano</name></author><author><name sortKey="Monticelli, F" uniqKey="Monticelli F">F Monticelli</name></author><author><name sortKey="Osorio, R" uniqKey="Osorio R">R Osorio</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Barbosa, Ga" uniqKey="Barbosa G">GA Barbosa</name></author><author><name sortKey="Das Neves, Fd" uniqKey="Das Neves F">FD das Neves</name></author><author><name sortKey="De Mattos Mda, G" uniqKey="De Mattos Mda G">G de Mattos Mda</name></author><author><name sortKey="Rodrigues, Rc" uniqKey="Rodrigues R">RC Rodrigues</name></author><author><name sortKey="Ribeiro, Rf" uniqKey="Ribeiro R">RF Ribeiro</name></author></analytic></biblStruct></listBibl></div1></back></TEI><pmc article-type="research-article"><pmc-dir>properties open_access</pmc-dir>
<front><journal-meta><journal-id journal-id-type="nlm-ta">Dent Res J (Isfahan)</journal-id><journal-id journal-id-type="iso-abbrev">Dent Res J (Isfahan)</journal-id><journal-id journal-id-type="publisher-id">DRJ</journal-id><journal-title-group><journal-title>Dental Research Journal</journal-title></journal-title-group><issn pub-type="ppub">1735-3327</issn><issn pub-type="epub">2008-0255</issn><publisher><publisher-name>Medknow Publications & Media Pvt Ltd</publisher-name><publisher-loc>India</publisher-loc></publisher></journal-meta><article-meta><article-id pub-id-type="pmid">26288627</article-id><article-id pub-id-type="pmc">4533195</article-id><article-id pub-id-type="publisher-id">DRJ-12-359</article-id><article-id pub-id-type="doi">10.4103/1735-3327.161458</article-id><article-categories><subj-group subj-group-type="heading"><subject>Original Article</subject></subj-group></article-categories><title-group><article-title>Effect of tightening torque on the marginal adaptation of cement-retained implant-supported fixed dental prostheses</article-title></title-group><contrib-group><contrib contrib-type="author"><name><surname>Ghanbarzadeh</surname><given-names>Jalil</given-names></name><xref ref-type="aff" rid="aff1">1</xref></contrib><contrib contrib-type="author"><name><surname>Dashti</surname><given-names>Hossin</given-names></name><xref ref-type="aff" rid="aff1">1</xref></contrib><contrib contrib-type="author"><name><surname>Karamad</surname><given-names>Reza</given-names></name><xref ref-type="aff" rid="aff1">1</xref></contrib><contrib contrib-type="author"><name><surname>Alikhasi</surname><given-names>Marzieh</given-names></name><xref ref-type="aff" rid="aff2">2</xref></contrib><contrib contrib-type="author"><name><surname>Nakhaei</surname><given-names>Mohammadreza</given-names></name><xref ref-type="aff" rid="aff1">1</xref><xref ref-type="corresp" rid="cor1"></xref></contrib></contrib-group><aff id="aff1"><label>1</label>Department of Prosthodontics, School of Dentistry, Mashhad University of Medical Sciences, Mashhad, Iran</aff><aff id="aff2"><label>2</label>Department of Prosthodontics and Implant, Dental Research Center, School of Dentistry, Tehran University of Medical Sciences, Tehran, Iran</aff><author-notes><corresp id="cor1"><bold>Address for correspondence:</bold> Dr. Mohammadreza Nakhaei, Department of Prosthodontics, School of Dentistry, Vakilabad Blvd, P.O. Box: 91735-984, Mashhad, Iran. E-mail: <email xlink:href="mrn_nakhaei@yahoo.com">mrn_nakhaei@yahoo.com</email> & <email xlink:href="nakhaeemr@mums.ac.ir">nakhaeemr@mums.ac.ir</email></corresp></author-notes><pub-date pub-type="ppub"><season>Jul-Aug</season><year>2015</year></pub-date><volume>12</volume><issue>4</issue><fpage>359</fpage><lpage>364</lpage><history><date date-type="received"><month>5</month><year>2014</year></date><date date-type="accepted"><month>7</month><year>2014</year></date></history><permissions><copyright-statement>Copyright: © Dental Research Journal</copyright-statement><copyright-year>2015</copyright-year><license license-type="open-access" xlink:href="http://creativecommons.org/licenses/by-nc-sa/3.0"><license-p>This is an open-access article distributed under the terms of the Creative Commons Attribution-Noncommercial-Share Alike 3.0 Unported, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.</license-p></license></permissions><abstract><sec id="st1"><title>Background:</title><p>The final position of the abutment changes with the amount of tightening torque. This could eventually lead to loss of passivity and marginal misfit of prostheses. The aim of this study was to evaluate the effect of three different tightening torques on the marginal adaptation of 3-unit cement-retained implant-supported fixed dental prostheses (FDPs).</p></sec><sec id="st2"><title>Materials and Methods:</title><p>Two implants (Straumann) were inserted in an acrylic block so that one of the implants was placed vertically and the other at a 15° vertical angle. A straight abutment and a 15° angulated abutment were connected to the vertically and obliquely installed implants, respectively, so that the two abutments were parallel. Then, 10 cement-retained FDPs were waxed and cast. Abutments were tightened with 10, 20, and 35 Ncm torques, respectively. Following each tightening torque, FDPs were luted on respective abutments with temporary cement. The marginal adaptation of the retainers was evaluated using stereomicroscope. FDPs were then removed from the abutments and were sectioned at the connector sites. The retainers were luted again on their respective abutments. Luting procedures and marginal adaptation measurement were repeated. Data were analyzed by ANOVA and least significant difference tests (α = 0.05). After cutting the FDP connectors, the independent samples <italic>t</italic>-test was used to compare misfit values (α = 0.05).</p></sec><sec id="st3"><title>Results:</title><p>Following 10, 20, and 35 Ncm tightening torques, the marginal discrepancy of the retainers of FDPs significantly increased (<italic>P</italic> < 0.05). There was no significant difference between the marginal discrepancies of these two retainers (<italic>P</italic> > 0.05). The marginal gap values of angulated abutment retainers (ANRs) were significantly higher than those of the straight abutment after cutting the connectors (<italic>P</italic> = 0.026).</p></sec><sec id="st4"><title>Conclusion:</title><p>Within the limitations of this study, the marginal misfit of cement-retained FDPs increased continuously when the tightening torque increased. After cutting the connectors, the marginal misfit of the ANRs was higher than those of the straight abutment retainers.</p></sec></abstract><kwd-group><kwd>Dental implants</kwd><kwd>fixed partial denture</kwd><kwd>implant-supported prosthesis</kwd><kwd>marginal adaptation</kwd><kwd>torque</kwd></kwd-group></article-meta></front></pmc><affiliations><list><country><li>Iran</li></country></list><tree><country name="Iran"><noRegion><name sortKey="Ghanbarzadeh, Jalil" sort="Ghanbarzadeh, Jalil" uniqKey="Ghanbarzadeh J" first="Jalil" last="Ghanbarzadeh">Jalil Ghanbarzadeh</name></noRegion><name sortKey="Alikhasi, Marzieh" sort="Alikhasi, Marzieh" uniqKey="Alikhasi M" first="Marzieh" last="Alikhasi">Marzieh Alikhasi</name><name sortKey="Dashti, Hossin" sort="Dashti, Hossin" uniqKey="Dashti H" first="Hossin" last="Dashti">Hossin Dashti</name><name sortKey="Karamad, Reza" sort="Karamad, Reza" uniqKey="Karamad R" first="Reza" last="Karamad">Reza Karamad</name><name sortKey="Nakhaei, Mohammadreza" sort="Nakhaei, Mohammadreza" uniqKey="Nakhaei M" first="Mohammadreza" last="Nakhaei">Mohammadreza Nakhaei</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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