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• W4385708575 abstract "ObjectivesSince one-third of persons suffer a dental trauma, treatment of anterior teeth using post and core (PC) is becoming important. In teeth with extensive destruction, cast PC (CPC) remain the “gold standard”, even though they lead to aesthetic impairment and have a mismatching elastic modulus to that of dentin. Prefabricated fibre-reinforced posts have elastic modulus similar to that of dentin but the accuracy of fit and mechanical stability are worse. This study was aimed to evaluate the deviation and mechanical performance of fibre-reinforced CAD/CAM PC (FRPC) fabricated in a fully digital chairside workflow, compared to those of CPC.MethodsOn 30 teeth, a PC preparation was conducted, and a conventional and digital post impression were taken with an intraoral scanner. Fifteen teeth each were treated with CPC and FRPC, respectively. The deviation was evaluated by superimposing the datasets of the digitalised stone models and digital post impressions. Decementation and root fracture during chewing simulation were analysed by microscopy and X-ray. Statistical analysis was performed by pairwise comparison and Kaplan-Meier analysis.ResultsThe median deviation for the “coronal”, “middle” and “apical” were 14.5, 18.0 and 113.7 μm, respectively. The pairwise comparison for “coronal”/“middle” showed no significance (p = 0.465), whereas that for “coronal”/“apical” and “middle”/“apical” showed highly significant differences (p < 0.001). After chewing simulation, five decementations and two root fractures were detected for CPC. For FRPC, neither decementation nor root fracture were documented.SignificanceWithin the limitations of this study, FRPC performed significantly better than CPC." @default.
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• W4385708575 date "2023-08-01" @default.
• W4385708575 modified "2023-09-25" @default.
• W4385708575 title "Fibre-reinforced Cad/CAM post and cores: The new “gold standard” for anterior teeth with extensive coronal destruction?–A fully digital chairside workflow" @default.
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• W4385708575 doi "https://doi.org/10.1016/j.heliyon.2023.e19048" @default.
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