Chulalongkorn University Dental Journal

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Objective The objective of this study was to compare the fracture resistance of teeth with various thickness of dentinal wall restored with fiber reinforced post and composite core. Materials and methods Endodontic preparation was performed on forty mandibular second premolars. The tooth was decoronated and divided into 4 groups (n=10). Group 1 : Dentinal wall was prepared correspond to No. 1 D.T. Light post. Group 2, 3, and 4 had remaining dentinal wall thickness of 2, 1.5 and 1 mm, respectively. All samples were restored with D.T. Light post #1, Multicore flow resin composite and Super-Bond C & B resin cement as luting agent. The specimen was vertically loaded using a universal testing machine until fracture. The maximum fracture load in Newton of all specimens was recorded and analyzed with ANOVA at p < 0.05. Results ANOVA showed that the remaining dentinal thickness in root canal did not affect the fracture resistance. Approximately 80% of fracture mode was within the core part. Conclusion Fracture resistances of endodontically treated teeth with various thickness of dentinal wall restored with fiber reinforced post with composite core does not affect to fracture resistances of endodontically treated teeth.



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