The Effect of Gamma Sterilization on Radiopacity and Bond Strength of Two Types of Fiber Post

Abstract

iber reinforced posts have been widely used for restoration of endodonticaly treated teeth. Similarity in elastic behavior between fiber posts and the residual root dentin, decreases the rate of root fracture, restoration of an endodontically treated teeth by fiber post and core becomes a common approach nowadays, however clinicians face a lot of challenges regarding the bond strength and the radiopacity especially when sterilization of such posts is essential. Due to a number of reasons the dentist often has to change his initial choice where disinfection and sterilization of the post is necessary for later re-use. Proper and efficient sterilization of materials between each patient is a legal obligation, an ethical responsibility and an essential measure in the fight against cross-infection. Among the most widely used sterilization techniques, exposure to gamma rays is the most commonly used technique to sterilize pharmaceuticals and medical devices because of its high penetrating ability, uniform and time dependent delivery of the required doses without any toxic residue. On the other hand, autoclave sterilization is the most popular method of sterilization and is considered as a gold standard for sterilization procedures. However clinicians face a lot of challenges regarding the bond strength and the radiopacity especially when sterilization of such posts is essential, therefore this study was conducted focusing on gamma and