title: Comparison of two techniques for removing fiber posts.
abstract: The purpose of this study was to evaluate the time needed to remove several types of fiber posts using two different bur kits. Estimates refer to the time needed to pass the fiber post until arriving at the gutta-percha. Sixty extracted anterior teeth were treated endodontically. A post space with a standard depth of 10 mm was prepared in each root canal. The sample was randomly divided into 3 groups of 20 specimens each. Three different types of posts were cemented: group 1, Conic 6% tapered fiber posts (Ghimas); group 2, FRC Poster fiber posts (Ivoclar-Vivadent); and group 3, Composipost carbon fiber posts (RTD). To remove the post, for half of each group's specimens the burs from the RTD fiber posts removal kit were used (subgroup A). From the other half of the teeth in each group (subgroup B), posts were removed by using a diamond bur and a Largo bur. Composipost carbon fiber posts (group 3) took significantly less time to remove than the other two types of posts (p < 0.05). For the bur kits, the procedure involving the use of a diamond and a Largo bur (subgroup B) was significantly faster (p < 0.05). The interaction between the type of post and the type of bur kit used was not significant (p > 0.05).
mesh_terms: D000704:Analysis of Variance; D002244:Carbon / Q000737:chemistry; D000077482:Carbon Fiber; D002484:Cementation; D003188:Composite Resins / Q000737:chemistry; D000044:Dental Abutments; D017005:Dental Debonding / Q000295:instrumentation / Q000379:methods*; D003764:Dental Materials / Q000737:chemistry; D017267:Dental Prosthesis Design; D018130:Diamond / Q000737:chemistry; D004867:Equipment Design; D006801:Humans; D008422:Materials Testing; D011176:Post and Core Technique / Q000295:instrumentation*; D019279:Resin Cements / Q000737:chemistry; D013997:Time Factors
chemical_list: D000077482:Carbon Fiber; D003188:Composite Resins; D003764:Dental Materials; D019279:Resin Cements; C452226:tetric flow composite resin; D002244:Carbon; D018130:Diamond