Influence of different photoinitiators on polymerization kinetics and marginal microleakage in restorations using photopolymerizable dental composites

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dc.creatorHugo Henrique Alvim
dc.creatorNatalia Mendes Campos
dc.creatorWalison Arthuso Vasconcellos
dc.creatorVírgínia Angélica Silva
dc.creatorAllyson Nogueira Moreira
dc.creatorAlexandre Gatti
dc.date.accessioned2022-09-19T17:36:26Z
dc.date.accessioned2025-09-08T23:50:07Z
dc.date.available2022-09-19T17:36:26Z
dc.date.issued2017-07-19
dc.format.mimetypepdf
dc.identifier.doi10.4034/PBOCI.2017.171.24
dc.identifier.issn15190501
dc.identifier.urihttps://hdl.handle.net/1843/45293
dc.languageeng
dc.publisherUniversidade Federal de Minas Gerais
dc.relation.ispartofPesquisa Brasileira em Odontopediatria e Clínica Integrada
dc.rightsAcesso Aberto
dc.subjectPhotoinitiators dental
dc.subjectTooth
dc.subjectComposite resins
dc.subjectDental leakage
dc.subject.otherPhotoinitiators
dc.subject.otherDental
dc.subject.otherComposite resins
dc.subject.otherDental leakage.
dc.titleInfluence of different photoinitiators on polymerization kinetics and marginal microleakage in restorations using photopolymerizable dental composites
dc.typeArtigo de periódico
local.citation.epage9
local.citation.issue1
local.citation.spage1
local.citation.volume17
local.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 rates
local.publisher.countryBrasil
local.publisher.departmentFAO - DEPARTAMENTO DE ODONTOLOGIA RESTAURADORA
local.publisher.initialsUFMG
local.url.externahttps://www.redalyc.org/articulo.oa?id=63749543027

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