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Biomechanical behavior of weakened roots restored with custom-made post-and-cores of glass fiber and polyetheretherketone.

Isabela G Gontijo,Marcela A Ferretti,Ricardo A Caldas,Vanessa G A Pecorari,Fabiana M G França, Lorena K N Oliveira,Flávio H B Aguiar

Journal of prosthodontics : official journal of the American College of Prosthodontists（2022）

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Abstract
Post type and mechanical aging influence the compression force resistance and fracture pattern of weakened roots. Milled glass fiber and polyetheretherketone post-and-cores exhibited higher compression force resistance and more reparable fractures compared to prefabricated glass fiber posts. Prefabricated glass fiber posts and milled polyetheretherketone post-and-cores showed similar stress distribution.
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Key words
CAD-CAM,Post and core technique,finite element analysis,fracture strength
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