title: Effect of luting agents and reconstruction techniques on the fracture resistance of pre-fabricated post systems.
abstract: Fracture resistance and fracture modes of endodontically treated maxillary central incisors restored with different post-and-core systems covered with all-ceramic copings were evaluated. Ten samples were prepared for each group. Groups 1, 2 and 3 consisted of tooth-coloured post-and-core, zirconia post (Cosmopost) with a composite core (Tetric Ceram), zirconia post (Cosmopost) with a custom made ceramic core (Cosmo Ingot), glass fibre-reinforced post (FRC Postec) with a composite core (Tetric Ceram), respectively. Group 4 consisted of a titanium post (ERpost) with a composite core (Tetric Ceram). The control group (group 5) consisted of root-filled incisors without posts. Tooth-coloured posts were cemented in the roots using Variolink-2, while titanium posts were cemented in the roots using Harvard cement. The all-ceramic copings were cemented using Variolink-2. Static load was applied to 2 mm below the incisal edge on the palatinal surface of each sample until they were fractured. Fracture data were obtained and statistically analysed with One-way anova and a Tukey's test. The results of the means and standard deviations of the fracture resistance during static loading were: 497.5 +/- 61.94 (1), 474.61 +/- 96.84 (2), 494.61 +/- 104.67 (3), 581.34 +/- 105.36 (4), 420.42 +/- 127.48 (5). There were statistically significant differences between groups 4 and 5. Glass fibre-reinforced posts and composite cores (group 3) showed the most catastrophic failure. Consequently, zirconia ceramic posts can be used in clinical practice.
authors.affiliation: Department of Prosthetic Dentistry, Faculty of Dentistry, Ege University, Bornova-Izmir, Turkey. sunatoksavul@yahoo.com
authors.forename: S
authors.initials: S
authors.lastname: Toksavul
authors.forename: M
authors.initials: M
authors.lastname: Toman
authors.forename: B
authors.initials: B
authors.lastname: Uyulgan
authors.forename: P
authors.initials: P
authors.lastname: Schmage
authors.forename: I
authors.initials: I
authors.lastname: Nergiz
mesh_terms: D000704:Analysis of Variance; D003188:Composite Resins; D003442:Crowns; D003738:Dental Cements; D003776:Dental Porcelain; D019232:Dental Restoration Failure; D003799:Dental Stress Analysis; D005898:Glass; D006801:Humans; D007180:Incisor; D008422:Materials Testing; D011176:Post and Core Technique; D014025:Titanium; D014082:Tooth Fractures / Q000517:prevention & control*; D019553:Tooth, Nonvital; D015040:Zirconium
chemical_list: D003188:Composite Resins; D003738:Dental Cements; C009753:fiberglass; D003776:Dental Porcelain; D015040:Zirconium; D014025:Titanium