Fibre Post

Fibre PostThe  history  of  the  root  canal  fibre  post  begins  in  1983  with  Lovell  and  continues  with  Duret-Reynaud,  who  in  1988  invented  the Composipost system which incorporates carbon fibres in an epoxy resin matrix. Duret  and  colleagues  recognised  the  great  advantage  of  combining  materials  with the  same  physical  and  mechanical  properties in  order  to  create  a  unit  of  tooth-cement-post-restoration  material  which  would  allow  the  functional  load  from  the  prosthesis  to  be absorbed in the same way as with an intact tooth. In fact, the fibre post presents a modulus of elasticity very similar to dentin Fig. 2 thanks to its anisotropic behaviour,  its capacity to adapt its physical properties to the load direction of an endodontically treated, restored tooth undergoing dangerous lateral loads. The post�s anisotropic behaviour, its dentin-like modulus of elasticity and the use of a BisGMA based cement ensure a homogenous structure improving the absorption and distribution of mastication loads. In contrast, materials with a high modulus of elasticity in a restored tooth favour the risk of root fracture as, due to the high rigidity, the loads are concentrated mainly in the apical region and along the walls of the tooth.



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