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  • Title: Comparison of fracture resistance of endodontically treated teeth restored with different aesthetic post and core systems under all ceramic restoration luted with two types of cements.
    Author: Amritha KM, Gopalakrishnan S, Anilkumar S, Chandrababu K.
    Journal: Indian J Dent Res; 2023; 34(1):60-64. PubMed ID: 37417059.
    Abstract:
    CONTEXT: Fracture of endodontically treated teeth is a grave sequela that a clinician should seriously ponder. Suitable selection of restorative materials is a requisite for long-term clinical success. AIMS: To compare the fracture resistance of endodontically treated teeth restored with three different posts luted using two different cements under all ceramic crowns. SETTINGS AND DESIGN: This in vitro study was conducted in the Department of Prosthodontics, Government Dental College, Kottayam, Kerala, India. METHODS AND MATERIAL: Thirty endodontically treated single-rooted mandibular premolars in which post spaces were prepared and divided into three different groups. Group 1 (n = 10): zirconia post group. Group 2 (n = 10): quartz fibre post group. Group 3 (n = 10): glass fibre post group. Each group is sub-divided into two based on the luting system: resin-modified glass ionomer cement (RMGIC) or dual-cure resin cement (DCRC). The fracture resistance testing was performed in a universal testing machine with a crosshead speed of 0.5 mm/min. STATISTICAL ANALYSIS USED: The mean fracture resistance were analysed using independent sample Student t-test and one-way ANOVA. RESULTS: : Within the zirconia post group, the mean fracture resistance was higher in DCRC sub-group compared to the RMGIC sub-group and the difference was statistically significant (p = 0.017). The difference in fracture resistance between three different post systems was not found to be statistically significant with respect to both the luting systems. CONCLUSIONS: It was observed that when zirconia post is used, the mean fracture resistance was higher in dual-cure resin group compared to the resin-modified GIC group.
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