The effect of different reinforcements on the fracture toughness of materials for interim restorations

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dc.contributor.authorGeerts, Greta
dc.contributor.authorOverturf, Jan-Hendrik
dc.contributor.authorOberholzer, Theunis
dc.date.accessioned2014-05-25T19:38:55Z
dc.date.available2014-05-25T19:38:55Z
dc.date.issued2008
dc.description.abstractSTATEMENT OF PROBLEM. Fracture of an interim fixed partial denture (FPD) may jeopardize the success of the interim prosthodontic treatment phase and cause patient discomfort. PURPOSE. The purpose of this study was to compare the fracture toughness of a polymethyl methacrylate (PMMA) resin and a bis-acryl composite (BAC) resin reinforced with stainless steel wire, glass, and polyethylene fiber. MATERIAL AND METHODS. Four groups (n=13) of each of the 2 materials were prepared for the single-edge 3-point-bending test. Three groups had the different reinforcements, and the group without reinforcement served as control. Using a universal testing machine, peak load to fracture was recorded and fracture toughness (KIC) was calculated in MNm-1.5. Median KIC values were compared by means of nonparametric ANOVA (Kruskal-Wallis test, α=.05). RESULTs. For the controls, the fracture toughness for PMMA resin (KIC=27.9) was significantly lower (P<.01) than for BAC resin (KIC=31.2). Glass fibers and stainless steel wire reinforcements produced significantly higher fracture toughness for both PMMA (KIC=34.4, P<.01, and KIC=39.0, P<.001, respectively) and BAC resin (KIC=42.3, P<.001, and KIC=44.0, P<.001, respectively), but the polyethylene fibers did not (KIC=33.1, P>.10, for BAC resin and KIC=25.8, P>.10, for PMMA resin). There was no significant difference between the fracture toughness of the wire and glass fiber reinforcements for both interim materials (P>.10 in both instances). CONCLUSIONS. Of the 3 reinforcement methods evaluated, wire and glass fiber reinforced the PMMA and BAC resin materials best.en_US
dc.description.accreditationWeb of Scienceen_US
dc.identifier.citationGeerts, G.A.V.M. ; Overturf, J. & Oberholzer, T. (2008). The effect of different reinforcements on the fracture toughness of materials for interim restorations. The Journal of Prosthetic Dentistry, 99 (6): 461-467en_US
dc.identifier.issn0022-3913
dc.identifier.urihttp://hdl.handle.net/10566/1083
dc.language.isoenen_US
dc.privacy.showsubmitterfalse
dc.publisherElsevieren_US
dc.rightsThis is the author final version, copyright Elsevier.
dc.status.ispeerreviewedtrue
dc.subjectPolymethyl methacrylateen_US
dc.subjectBis-acryl compositeen_US
dc.titleThe effect of different reinforcements on the fracture toughness of materials for interim restorationsen_US
dc.typeArticleen_US

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