title: Fracture resistance of premolars with one remaining cavity wall restored using different techniques.
abstract: The aim of the study was to compare the fracture resistance of maxillary premolars with one remaining cavity wall restored using different post systems. Forty-eight maxillary premolars were endodontically treated and randomly assigned to four groups for postcore restoration. The first three test groups were restored with polyethylene woven fiber posts, custom-made glass fiber-reinforced composite posts, and titanium posts respectively. In the control Group 4, standardized cavities (3.5 x 1.5 mm) were prepared in the palatal canal entrance and filled with a resin composite. All the specimens were then restored with a resin composite crown seated on the post. Load was applied with a stainless steel ball (1 mm/min), and the failure modes of all specimens were evaluated. There were no significant differences in fracture resistance and failure mode among the different restorative materials (p>0.05). Within the limitations of this in vitro study, it was concluded that the presence and type of post did not influence the fracture load and failure mode of maxillary premolar teeth with one remaining cavity wall.
authors.affiliation: Department of Operative Dentistry and Endodontics, Faculty of Dentistry, Gazi University, Turkey. bagdagulkivanc@gmail.com
authors.forename: Bagdagül Helvacioglu
authors.initials: BH
authors.lastname: Kivanç
authors.forename: Tayfun
authors.initials: T
authors.lastname: Alaçam
authors.forename: Güliz
authors.initials: G
authors.lastname: Görgül
mesh_terms: D000704:Analysis of Variance; D001641:Bicuspid; D003188:Composite Resins; D003737:Dental Cavity Preparation; D019232:Dental Restoration Failure; D003793:Dental Restoration, Permanent / Q000379:methods*; D003799:Dental Stress Analysis; D005898:Glass; D006801:Humans; D008422:Materials Testing; D008437:Maxilla; D011095:Polyethylenes; D011176:Post and Core Technique; D018709:Statistics, Nonparametric; D014025:Titanium; D014082:Tooth Fractures / Q000517:prevention & control*; D019553:Tooth, Nonvital
chemical_list: D003188:Composite Resins; D011095:Polyethylenes; C009753:fiberglass; D014025:Titanium