should be identified to prevent damages. The purpose of this work is to present errors in indirect restorative therapies and the possible biomechanical factors involved within the selection of materials and post sorts. Prefabricated and forged metallic posts had an ample use during XX century; nonetheless their excessive modulus of elasticity provide excessive stress focus, rising risk for fractures, along with the lack of adhesive interaction with the dental structure. Glass fiber posts present decrease fracture resistance, modulus of elasticity close to that of dentin and
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