dc.contributorUniversidade de São Paulo (USP)
dc.contributorUniversity of Southern Santa Catarina
dc.contributorAmazonas State University
dc.date.accessioned2022-04-29T08:43:58Z
dc.date.accessioned2022-12-20T03:13:07Z
dc.date.available2022-04-29T08:43:58Z
dc.date.available2022-12-20T03:13:07Z
dc.date.created2022-04-29T08:43:58Z
dc.date.issued2008-01-01
dc.identifierBrazilian Dental Journal, v. 19, n. 4, p. 329-333, 2008.
dc.identifier1806-4760
dc.identifier0103-6440
dc.identifierhttp://hdl.handle.net/11449/231197
dc.identifier10.1590/s0103-64402008000400008
dc.identifier2-s2.0-63249122986
dc.identifier.urihttps://repositorioslatinoamericanos.uchile.cl/handle/2250/5411331
dc.description.abstractThis study evaluated the fracture resistance of weakened roots restored with glass fiber posts, composite resin cores and complete metal crowns. Thirty maxillary canines were randomly divided into 3 groups of 10 teeth each: teeth without weakened roots (control); teeth with partially weakened roots (PWR) and teeth with and largely weakened roots (LWR). The control group was restored with glass fiber posts and a composite resin core. Teeth in the PWR and LWR groups were flared internally to standardized dimensions in order to simulate root weakness. Thereafter, the roots were partially filled with composite resin and restored in the same way as in the control group. The specimens were exposed to 250,000 cycles in a controlled chewing simulator. All intact specimens were subjected to a static load (N) in a universal testing machine at 45 degrees to the long axis of the tooth until failure. Data were analyzed by one-way ANOVA and Dunnett's test for multiple comparisons (p=0.05). There were statistically significant difference differences (p<0.01) among the groups (control group = 566.73 N; PWR = 409.64 N; and LWR = 410.91 N), with significantly higher fracture strength for the control group. There was no statistically significant difference (p>0.05) between the weakened groups. The results of this study showed that thicker root dentin walls significantly increase the fracture resistance of endodontically treated teeth.
dc.languageeng
dc.relationBrazilian Dental Journal
dc.sourceScopus
dc.subjectComposite resins
dc.subjectFracture strength
dc.subjectPost-and-core technique
dc.titleFracture resistance of weakened roots restored with composite resin and glass fiber post
dc.typeArtículos de revistas


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