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Please use this identifier to cite or link to this item: http://hdl.handle.net/1843/45293
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dc.creatorHugo Henrique Alvimpt_BR
dc.creatorNatalia Mendes Campospt_BR
dc.creatorWalison Arthuso Vasconcellospt_BR
dc.creatorVírgínia Angélica Silvapt_BR
dc.creatorAllyson Nogueira Moreirapt_BR
dc.creatorAlexandre Gattipt_BR
dc.date.accessioned2022-09-19T17:36:26Z-
dc.date.available2022-09-19T17:36:26Z-
dc.date.issued2017-07-19-
dc.citation.volume17pt_BR
dc.citation.issue1pt_BR
dc.citation.spage1pt_BR
dc.citation.epage9pt_BR
dc.identifier.doi10.4034/PBOCI.2017.171.24pt_BR
dc.identifier.issn15190501pt_BR
dc.identifier.urihttp://hdl.handle.net/1843/45293-
dc.description.resumoObjective: To evaluate the influence of four different photoinitiators on the polymerization kinetics and marginal microleakage in class V restorations using photopolymerizable dental composites. Material and Methods: Four photopolymerizable dental composites based on Bis-GMA (14.5 wt %), UDMA (6.5 wt %) and silanized filler particles (79 wt %) containing different photoinitiators were formulated. Camphorquinone (CQ)/amine, phenyl-propanedione (PPD), monoacylphosphine oxide (Lucirin® TPO) and bisacylphosphine oxide (Irgacure® 819) were used as photoinitiators. Sixteen intact human third molars were selected and divided into four groups. All teeth received class V cavity preparations in their buccal and lingual surfaces and were submitted to a dye leakage test. Data were independently analyzed for both enamel and dentin, and the results were assessed by a Kruskal-Walis test. The polymerization reactions of the four composites were evaluated by differential scanning calorimeter coupled with photocalorimeter accessory. Results: Lucirin® TPO presented the highest scores for microleakage in enamel, whereas the other photoinitiators have not demonstrated statistical differences. The lowest scores were obtained for PPD in dentin while the highest scores have been achieved by Irgacure® 819 and Lucirin® TPO. Photocalorimetric measurements demonstrated a correlation between polymerization reaction rate and marginal leakage, showing that faster reactions cause greater marginal leakage. Conclusion: Marginal microleakage scores in photopolymerizable dental composites can be greatly influenced by different types of photoinitiators through their distinct reaction ratespt_BR
dc.format.mimetypepdfpt_BR
dc.languageengpt_BR
dc.publisherUniversidade Federal de Minas Geraispt_BR
dc.publisher.countryBrasilpt_BR
dc.publisher.departmentFAO - DEPARTAMENTO DE ODONTOLOGIA RESTAURADORApt_BR
dc.publisher.initialsUFMGpt_BR
dc.relation.ispartofPesquisa Brasileira em Odontopediatria e Clínica Integradapt_BR
dc.rightsAcesso Abertopt_BR
dc.subjectPhotoinitiatorspt_BR
dc.subjectDentalpt_BR
dc.subjectComposite resinspt_BR
dc.subjectDental leakage.pt_BR
dc.subject.otherPhotoinitiators dentalpt_BR
dc.subject.otherToothpt_BR
dc.subject.otherComposite resinspt_BR
dc.subject.otherDental leakagept_BR
dc.titleInfluence of different photoinitiators on polymerization kinetics and marginal microleakage in restorations using photopolymerizable dental compositespt_BR
dc.typeArtigo de Periódicopt_BR
dc.url.externahttps://www.redalyc.org/articulo.oa?id=63749543027pt_BR
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