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Vertical Fracture Resistance of
Endodontically Treated Teeth with
Various Remaining Dentinal Wall Thickness
Authors :
- Siriluk Charoenwiriyakul, D.D.S. (Hons)
- Supaboon Purnaveja, D.D.S., M.Sc.
- Mansuang Arksornnukit, D.D.S. (Hons), M.S., Ph.D.
Abstract :
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.
(CU Dent J. 2009;32:123-32)
Keywords :
Endodontically treated teeth; Fracture mode; Fracture resistance; Thickness dentinal wall
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