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Mickey 發問時間: 社會與文化語言 · 1 0 年前



The choice of an appropriate post material is controversially discussed: fiber reinforced composite posts have been recommended due to their dentin-likeYoung’s modulus. FRC posts allow teeth to flex under applied loads leading to an improved stress distribution between post and dentin. The risk of root fracture should be reduced , but may concentrate stress between cement and endodontic post resulting in loss of adhesion . Further it is argued that a more rigid post would allow less invasive preparations with smaller post diameters and avoid deformation of the entire post–core assembly . Root fractures have been attributed to extreme differences in rigidity of post and root dentin with stress concentrations inside the root . Torbjorner et al. summarize that there is the choice between a low modulus post possibly leading to reparable failures, or a high modulus post with probably later but more irreparable failures.

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  • 1 0 年前



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