Water sorption, solubility and effect of post-curing of glass fibre reinforced polymers

Miettinen, Varpu M.; Narva, Katja K.; Vallittu, Pekka K.

doi:10.1016/s0142-9612(99)00003-4

Cited by 78 publications

(46 citation statements)

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“…One problem associated with using 6 the polymer-monomer mixture in direct chairside pre-impregnation is the high viscosity that makes handling difficult (Vallittu, 1996). In order to overcome this problem, pre-impregnated FRC systems are developed, meaning that the FRC bundle can be applied as such when taken out of the package (Miettinen et al, 1998;Vallittu, 1998Vallittu, , 1994. Monomers such as UTMA and bis-GMA/PMMA, changes handling properties and cross-linking, thereby, increase the adhesive strength of the FRC to the PFC (Kumbuloglu et al, 2008).…”

Section: Introductionmentioning

confidence: 99%

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Load-bearing capacity of indirect inlay-retained fixed dental prostheses made of particulate filler composite alone or reinforced with E-glass fibers impregnated with various monomers

Özcan¹,

Koekoek²,

Pekkan³

2012

Journal of the Mechanical Behavior of Biomedical Materials

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The load-bearing capacity and failure types of indirect inlay-retained fixed dental prostheses (FDP), made of particulate filler composite (PFC) (Estenia) alone or reinforced with E-glass fibers impregnated with various monomers were evaluated. Indirect inlay-retained FDPs were made between first premolars and first molars (N=30, 10/per group). The inlay parts of the specimens were silica coated and silanized and the specimens were cemented with dual-polymerized resin cement under ultrasonic vibrations. The experimental groups were as follows: Group 1: FRC1 (BR-100, UTMA) + PFC; Group 2: FRC2 (everStick CB, Bis-GMA/PMMA) + PFC; Group 3: PFC only. The specimens were kept in distilled water at 37°C for one month and then subjected to fracture strength test. No significant difference was found between the Group 1 and Group 2 FDPs (1357±301 N and 1213±316 N, respectively) (p>0.05) (ANOVA). Group 3 (856±299 N) showed significantly lower results than those of FRC reinforced groups (p<0.05). Failure analyses revealed no debonding of any of the FDPs from the inlay cavities. FDPs made of PFC only showed mainly catastrophic fracture of the pontic. In the FRC reinforced groups, predominantly delamination of the veneering was observed. The use of silica coating and silanization in combination with the dual-polymerized resin cement used; under ultrasonic cementation procedure provided sufficient adhesion to withstand static loading forces at the cementation interface, since the failures were predominantly delamination of the veneering in the FRC reinforced groups. alone or reinforced with E-glass fibers impregnated with various monomers were evaluated. In the FRC reinforced groups, predominantly delamination of the veneering was observed. Materials and Methods Conclusions:The load-bearing capacity of the indirect inlay-retained FPDs made of PFC reinforced with both BR-100 and everStick C&B revealed statistically similar results that were significantly higher than PFC alone. The use of silica coating and silanization in combination with the dual-polymerized resin cement used; under ultrasonic cementation procedure provides sufficient adhesion to withstand static loading forces at the cementation interface, since the failures were predominantly 3 delamination of the veneering in the FRC reinforced groups.

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Section: Introductionmentioning

confidence: 99%

“…The most important reasons for preferring indirect FDPs to the direct ones are avoiding moisture during cementation that has negative effect on polymerization, and initial shrinkage where the latter outside the mouth gives less stress on the abutments in comparison to direct FDPs (Miettinen et al, 1998).…”

Section: Introductionmentioning

confidence: 99%

Load-bearing capacity of indirect inlay-retained fixed dental prostheses made of particulate filler composite alone or reinforced with E-glass fibers impregnated with various monomers

Özcan¹,

Koekoek²,

Pekkan³

2012

Journal of the Mechanical Behavior of Biomedical Materials

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“…There have been reports that the siloxane bonds in the fillers and the matrices in materials containing macro-fillers or submicron-fillers were influenced by hydrolysis or acids over the course of long-term observation periods (Miettinen, Narva & Vallittu, 1999;Vallittu, 1998;Söderhölm & others, 1984;Söderhölm, Mukherjee & Longmate;1996). Greater APF-induced influence can therefore be presumed, and the use of microfilled type materials that sustain less damage is highly desirable.…”

Section: Discussionmentioning

confidence: 99%

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2002

Operative Dentistry

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Aim and ScopeOperative Dentistry publishes articles that advance the practice of operative dentistry. The scope of the journal includes conservation and restoration of teeth; the scientific foundation of operative dental therapy; dental materials; dental education; and the social, political, and economic aspects of dental practice. Review papers, book reviews, letters, and classified ads for faculty positions are also published. Subscriptions: Fax (317) 852-3162Current pricing for individual, institutional and dental student subscriptions (both USA and all other countries) can be found at our website: www.jopdent.org, or by contacting our subscription manager:Fax 317/852-3162 E-mail: jmatis@indy.rr.com Information on single copies, back issues and reprints is also available. Make remittances payable (in US dollars only) to Operative Dentistry and send to the above address. Credit card payment (Visa, MasterCard, or JCB-Japanese equivalent) is also accepted by providing card type, card number, expiration date, and name as it appears on the card. ContributionsContributors should study the instructions for their guidance printed in this journal and should follow them carefully. PermissionFor permission to reproduce material from Operative Dentistry please apply to Operative Dentistry at the above address.The views expressed in Operative Dentistry do not necessarily represent those of the Academies or of the Editors. Editorial OfficeOperative Dentistry Indiana University School of Dentistry, Room S411 1121 West Michigan Street, Indianapolis, Fax: (317) Dentistry, 2002, 27, 209 T he annual gatherings of the various academies in Chicago have just ended. The many opportunities for reunions that these meetings provide buoy me up and underscore the pure joy of having chosen to be a dentist. It is a time when we share ideas, experiences and concerns and it highlights the core values to which we jointly aspire. These gatherings are also a time to express the cares, concerns and frustrations that those of us in private practice, the military and academia carry in our hearts.One such concern and frustration relates to the dental educational process of tomorrow's dentists. A recent article featured in my alumni journal emphasized the dire need for alumni to offer their services in the clinical area of this Eastern school. While the plea was well put, few are accepting the challenge to teach and train future dentists. Many dentists state that choosing private practice over teaching is an issue of economics.Since private practice certainly provides greater income potential than teaching, it is easy to understand why students who incur more than $100,000 of indebtedness would have a hard time choosing an academic career over establishing their own practice. However, what about those of us who have cleared the early hurdles of indebtedness?We cannot expect the recent graduate to be adequately equipped to teach. We cannot reasonably look to private practitioners to be ready to teach if they have little or no experience in A...

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“…Some authors have observed a reduction in the mechanical properties of FRC after storage in water, 24,32,36,46 due to water sorption of the organic matrix of FRC increasing the matrix volume and also stress on the matrix-fiber interface. [46][47] Still, with regard to the cohesive fracture of the post, utilization of a compression cylinder with a rounded end and a 0.85 mm diameter in the push-out test may have contributed to the extrusion of one part of the fibers and epoxy resin from the post. Utilization of a cylinder with a flat base might reduce the number of cohesive failures of the post.…”

Section: Analysis Ofmentioning

confidence: 99%

Effect of Mechanical Cycling on the Push-out Bond Strength of Fiber Posts Adhesively Bonded to Human Root Dentin

Valandro

Baldissara²,

Galhano³

et al. 2007

Operative Dentistry

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SUMMARYThis study evaluated the effect of mechanical cycling on the bond strength of fiber posts bonded to root dentin. The hypotheses examined were that bond strength is not changed after fatigue testing and bond strength does not present vast variations according to the type of fiber post. Sixty crownless, single-rooted human teeth were endodontically treated, with the space prepared at 12 mm. Thirty specimens received a quartz fiber post (Q-FRC) (DT Light-Post), and the remaining 30 specimens received a glass fiber post (G-FRC) (FRC Postec Plus). All the posts were resin luted (All Bond+Duolink), and each specimen was embedded in a cylinder with epoxy resin. The specimens were divided into six groups: G1-Q-FRC+no cycling; G2-Q-FRC+20,000 cycles (load: 50N; angle of 45°; frequency: 8Hz); G3-Q-FRC+2,000,000 cycles; G4-G-FRC+no cycling; G5-G-FRC+20,000 cycles; G6-G-FRC+2,000,000 cycles. The specimens were cut perpendicular to their long axis, forming 2-mm thick disc-samples, which were submitted to the push-out test. ANOVA (α=.05) revealed that: (a) Q-FRC (7.1±2.2MPa) and G-FRC (6.9±2.1MPa) were statistically similar (p=0.665); (b) the "no cycling" groups (7.0±2.4MPa), "20,000 cycles" groups Clinical RelevanceWhen adhesively cemented, tested fiber posts are fatigue resistant and appear to have no affect on bond strength to root dentin. Thus, the retention strength of these fiber posts could be maintained for an extended period; however, further studies should be conducted. 580Operative Dentistry (7.0±2.1MPa) and "2,000,000 cycles" groups (7.0±2.0MPa) were statistically similar (p=0.996). It concluded that mechanical cycling did not affect the bond strength of two fiber posts bonded to dentin.

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Water sorption, solubility and effect of post-curing of glass fibre reinforced polymers

Cited by 78 publications

References 0 publications

Load-bearing capacity of indirect inlay-retained fixed dental prostheses made of particulate filler composite alone or reinforced with E-glass fibers impregnated with various monomers

Load-bearing capacity of indirect inlay-retained fixed dental prostheses made of particulate filler composite alone or reinforced with E-glass fibers impregnated with various monomers

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Effect of Mechanical Cycling on the Push-out Bond Strength of Fiber Posts Adhesively Bonded to Human Root Dentin

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