Fracture resistance of thin-walled roots restored with different post systems

• Published in: International endodontic journal 2009-11, Vol.42 (11), p.997-1003
• Main Authors: Kıvanç, B. H., Alaçam, T., Ulusoy, Ö. İ. A., Genç, Ö., Görgül, G.
• Format: Article
• Language: English
• Subjects: Composite Resins; Dental Stress Analysis; Dentin - pathology; Dentistry; fibre-reinforced composite post; Fracture resistance; Glass; Humans; Incisor - injuries; Metals; Polyethylenes; Post and Core Technique; Root Canal Preparation - methods; thin-walled roots; Tooth Fractures - prevention & control; Tooth Root - injuries; Tooth Root - pathology
• ISSN: 0143-2885; 1365-2591
• DOI: 10.1111/j.1365-2591.2009.01609.x

Aim  To compare the fracture resistance of thin‐walled roots after restoration with different types of post systems. Methodology  One hundred and sixty‐five decoronated maxillary central incisors were root filled and randomly assigned to three groups with respect to the remaining dentine thickness of root (1.0 mm, 1.5 mm, 2.0 mm). Each group was randomly divided into five equal subgroups. The subgroups were restored with one of the following post systems: polyethylene woven fibre (R), composite resin cured by light‐transmitting post + glass fibre post (L), electrical glass fibre post (E), composite corono‐radicular restoration (C) and cast metal post (M). Standard cores were constructed using composite resin in the first four groups. The samples were subjected to a gradually increasing force (1 mm min−1). The force required to fracture was recorded. The data was analysed with anova and Tukey test (P = 0.05). Results  The cast metal post group had the highest fracture strength (P