EFFECT OF FIBER BUNDLE POSTS USED IN DIFFERENT THICKNESSES ON FRACTURE RESISTANCE
BUNDLE FIBER POSTS RESISTANCE
DOI:
https://doi.org/10.33279/jkcd.v15i02.854Keywords:
bundle post, endodontic treatment, fiber post, fracture resistanceAbstract
Objectives: To evaluate in vitro the effect of three different thicknesses of traditional fibre posts and a novel canal post (bundle post) on the fracture resistance of restored teeth.
Materials and Methods: Ninety-two extracted single-rooted, single-canaled upper incisors were selected and prepared for endodontic treatment. The specimens were divided into six experimental groups (n=14 each) based on post type and thickness: Group I (Bundle Post 0.8 mm), Group II (Bundle Post 1 mm), Group III (Bundle Post 1.2 mm), Group IV (Fibre Post 0.8 mm), Group V (Fibre Post 1 mm), and Group VI (Fibre Post 1.2 mm). Additionally, two control groups were included: a negative control group (n=4, untreated healthy teeth) and a positive control group (n=4, canal prepared but unrestored). Fracture resistance was tested using an Instron device, and results were analyzed statistically.
Results: The negative control group showed the highest fracture resistance (2133.21 ± 317.42 N), significantly greater than the positive control group (1436.08 ± 334.31 N; p < 0.05). Among experimental groups, no statistically significant differences were observed based on post type or thickness (p > 0.05). For 0.8 mm posts, fracture resistance was 1211.14 ± 396.85 N (bundle) and 1276.42 ± 339.02 N (fibre); for 1 mm posts, 1355.49 ± 282.45 N (bundle) vs. 1271.86 ± 323.46 N (fi bre); and for 1.2 mm posts, 1122.74 ± 311.50 N (bundle) vs. 1062.49 ± 163.10 N (fibre), all with p > 0.05.
Conclusion: The fracture resistance of teeth restored with bundle fibre posts of varying thicknesses was comparable to those restored with conventional fibre posts.
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