File Download
  Links for fulltext
     (May Require Subscription)
Supplementary

Conference Paper: Effect of water immersion on monomer and strength of FRC

TitleEffect of water immersion on monomer and strength of FRC
Authors
KeywordsMonomer
Strength
FRC
Issue Date2014
PublisherElsevier Inc. The Journal's web site is located at http://www.elsevier.com/locate/dental
Citation
The 2014 Annual Meeting of the Academy of Dental Materials (ADM), Bologna, Italy, 8-11 October 2014. In Dental Materials, 2014, v. 30 suppl. 1, p. e7, abstract no. 13 How to Cite?
AbstractPURPOSE: There is an interest in the use of fiber-reinforced composite (FRC) to support the concept of minimal invasive dentistry. The exposure of FRC to the oral environment causes detrimental effect of water sorption (Takashi et al. Dent Mat 2006 22:291). With time water molecules will act as plasticizers and decrease the mechanical properties (Mese and Guzel. J Prosthet Dent 2008 99:153). Monomer system is the backbone of the dental composite (Garcia et al. Clinical Dentistry 2005: 215) and residual monomer may dissolve in water (Tanaka et al. J Oral Rehab 1991 18:353). Some released monomers are knownto elicit cytotoxic effects (Sakaguchi and Powers. Craig’s Restorative Dental Materials 2012:343), and methyl methacrylate (MMA) is mentioned as cytotoxic (Pradeep and Sreekumar. J Contemp Dent Pract 2012 6:838). This study investigated the effect of water immersion duration on monomer release and the compressive strength of fiber-reinforced composite. METHODS AND MATERIALS: Materials used were: E-glass fibre (Stick Tech, Finland), bis-GMA (Sigma–Aldrich, USA), MMA (ProSciTech, Australia), CQ (Esstech, USA) and CEMA (Esstech, USA). Fifteen specimens (2mm×2mm×25mm) with the composition of: 78.4% bis-GMA+19.6%MMA+ 1.0%CQ + 1.0%CEMA were prepared and divided into 2 groups: compressive strength (CS-12specimens) and residual monomer (RM-3specimens). Each specimen had two fiber rovings of 25mm and placed in a mould, and light-cured with halogen light-curing unit on both sides for 3×40 s. Specimens from each group were divided into three groups based on the water immersion durations (1, 14 and 21 days) and immersed into 10 ml distilled water at 37 ◦C. The three RM-specimens were analyzed using HPLC to test the residual monomer concentration. All CS-specimens were tested using UTM (Torsee’s UTM, Tokyo Testing Machine Mfg., Co., Ltd., Japan) for the compressive strength. RESULTS: The data of MMA concentration was descriptively analyzed. It started on day 1 (2352.96µg/ml) followed by an increase on day14 (3567.15µg/ml) and decreased on day 21 (2427.19µg/ml). Compressive strength showed an average (MPa) for day 1 (93.84±8.30); day 14 (67.83±4.82) and day 21 (51.08±2.10), respectively. Data from the compressive strength was analyzed by ANOVA, and it proved a significant decrease as the water immersion duration increases (p < 0.05). CONCLUSION: The duration of water immersion of e-glass FRC showed different effect on the concentration of released monomer and the compressive strength. Highest concentration of MMA concentration occurred on day 14 and followed by a decrease. As for the compressive strength, it decreased as the water immersion duration increased.
DescriptionThis journal suppl. entitled: Abstracts of the Academy of Dental Materials Annual Meeting, 8-11 October 2014 - Bologna, Italy
Persistent Identifierhttp://hdl.handle.net/10722/209879
ISSN
2015 Impact Factor: 3.931
2015 SCImago Journal Rankings: 1.339

 

DC FieldValueLanguage
dc.contributor.authorSiswomihardjo, W-
dc.contributor.authorSunarintyas, S-
dc.contributor.authorOmar Khatab Khan, AF-
dc.contributor.authorSahidu, NSI-
dc.contributor.authorMatinlinna, JP-
dc.date.accessioned2015-05-18T03:28:32Z-
dc.date.available2015-05-18T03:28:32Z-
dc.date.issued2014-
dc.identifier.citationThe 2014 Annual Meeting of the Academy of Dental Materials (ADM), Bologna, Italy, 8-11 October 2014. In Dental Materials, 2014, v. 30 suppl. 1, p. e7, abstract no. 13-
dc.identifier.issn0109-5641-
dc.identifier.urihttp://hdl.handle.net/10722/209879-
dc.descriptionThis journal suppl. entitled: Abstracts of the Academy of Dental Materials Annual Meeting, 8-11 October 2014 - Bologna, Italy-
dc.description.abstractPURPOSE: There is an interest in the use of fiber-reinforced composite (FRC) to support the concept of minimal invasive dentistry. The exposure of FRC to the oral environment causes detrimental effect of water sorption (Takashi et al. Dent Mat 2006 22:291). With time water molecules will act as plasticizers and decrease the mechanical properties (Mese and Guzel. J Prosthet Dent 2008 99:153). Monomer system is the backbone of the dental composite (Garcia et al. Clinical Dentistry 2005: 215) and residual monomer may dissolve in water (Tanaka et al. J Oral Rehab 1991 18:353). Some released monomers are knownto elicit cytotoxic effects (Sakaguchi and Powers. Craig’s Restorative Dental Materials 2012:343), and methyl methacrylate (MMA) is mentioned as cytotoxic (Pradeep and Sreekumar. J Contemp Dent Pract 2012 6:838). This study investigated the effect of water immersion duration on monomer release and the compressive strength of fiber-reinforced composite. METHODS AND MATERIALS: Materials used were: E-glass fibre (Stick Tech, Finland), bis-GMA (Sigma–Aldrich, USA), MMA (ProSciTech, Australia), CQ (Esstech, USA) and CEMA (Esstech, USA). Fifteen specimens (2mm×2mm×25mm) with the composition of: 78.4% bis-GMA+19.6%MMA+ 1.0%CQ + 1.0%CEMA were prepared and divided into 2 groups: compressive strength (CS-12specimens) and residual monomer (RM-3specimens). Each specimen had two fiber rovings of 25mm and placed in a mould, and light-cured with halogen light-curing unit on both sides for 3×40 s. Specimens from each group were divided into three groups based on the water immersion durations (1, 14 and 21 days) and immersed into 10 ml distilled water at 37 ◦C. The three RM-specimens were analyzed using HPLC to test the residual monomer concentration. All CS-specimens were tested using UTM (Torsee’s UTM, Tokyo Testing Machine Mfg., Co., Ltd., Japan) for the compressive strength. RESULTS: The data of MMA concentration was descriptively analyzed. It started on day 1 (2352.96µg/ml) followed by an increase on day14 (3567.15µg/ml) and decreased on day 21 (2427.19µg/ml). Compressive strength showed an average (MPa) for day 1 (93.84±8.30); day 14 (67.83±4.82) and day 21 (51.08±2.10), respectively. Data from the compressive strength was analyzed by ANOVA, and it proved a significant decrease as the water immersion duration increases (p < 0.05). CONCLUSION: The duration of water immersion of e-glass FRC showed different effect on the concentration of released monomer and the compressive strength. Highest concentration of MMA concentration occurred on day 14 and followed by a decrease. As for the compressive strength, it decreased as the water immersion duration increased.-
dc.languageeng-
dc.publisherElsevier Inc. The Journal's web site is located at http://www.elsevier.com/locate/dental-
dc.relation.ispartofDental Materials-
dc.rightsNOTICE: this is the author’s version of a work that was accepted for publication in Dental Materials. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Dental Materials, v. 30 suppl. 1, 2014. DOI: 10.1016/j.dental.2014.08.014-
dc.rightsCreative Commons: Attribution 3.0 Hong Kong License-
dc.subjectMonomer-
dc.subjectStrength-
dc.subjectFRC-
dc.titleEffect of water immersion on monomer and strength of FRC-
dc.typeConference_Paper-
dc.identifier.emailMatinlinna, JP: jpmat@hku.hk-
dc.identifier.authorityMatinlinna, JP=rp00052-
dc.description.naturepostprint-
dc.identifier.doi10.1016/j.dental.2014.08.014-
dc.identifier.hkuros243179-
dc.identifier.volume30-
dc.identifier.issuesuppl. 1-
dc.identifier.spagee7, abstract no. 13-
dc.identifier.epagee7, abstract no. 13-
dc.publisher.placeUnited States-

Export via OAI-PMH Interface in XML Formats


OR


Export to Other Non-XML Formats