title: Evaluation of a simplified fiber post removal system.
abstract: BACKGROUND
  This study investigated the influence of clinical experience in relation to the efficacy and effectiveness of removal of 2 different fiber posts.
  
  
  METHODS
  In total, 48 intact single-rooted teeth were treated endodontically and obturated. Then, 10-mm post spaces were prepared, and fiber posts were luted. Twenty-four #1 D.T. Light-Posts were used in group 1, and 24 #2 Hi-Rem Prosthetic Posts were used in group 2. A pullout test (n = 8 per group) was performed by using a universal testing machine to compare bond strength. Then, fiber post removal efficacy and efficiency were tested. Each group was divided into 2 subgroups (n = 8) according to operator experience. In group 1, fiber posts were removed with an ultrasonic handpiece by using a #3 Start-X tip. In group 2, a size 25/0.04 ProFile was used to remove the central soft polymer macrofiber, and a #2 Largo drill was used to remove the fiber post and luting cement remnants. Post removal times were recorded to evaluate efficacy. Weight change was determined, and post space walls were analyzed microscopically to evaluate effectiveness.
  
  
  RESULTS
  Bond strength did not differ significantly (P = .7569) between post systems. Post hoc Tukey tests indicated that removal time was affected significantly by operator experience in group 1 (P < .001) but not in group 2. Weight change was affected significantly by experience level in both groups. No difference in post space wall characteristics was observed between subgroups.
  
  
  CONCLUSIONS
  The Hi-Rem post was easier to remove than the D.T Light-Post.
authors.affiliation: Department of Surgical Sciences, Dental School, University of Turin, Torino, Italy. Electronic address: nicola.scotti@unito.it.
authors.forename: Nicola
authors.initials: N
authors.lastname: Scotti
authors.forename: Emanuele
authors.initials: E
authors.lastname: Bergantin
authors.forename: Mario
authors.initials: M
authors.lastname: Alovisi
authors.forename: Damiano
authors.initials: D
authors.lastname: Pasqualini
authors.forename: Elio
authors.initials: E
authors.lastname: Berutti
mesh_terms: D002484:Cementation / Q000379:methods; D055117:Curing Lights, Dental / Q000145:classification; D001840:Dental Bonding; D003764:Dental Materials / Q000737:chemistry; D017267:Dental Prosthesis Design; D003799:Dental Stress Analysis / Q000295:instrumentation; D020878:Device Removal; D005898:Glass / Q000737:chemistry; D006801:Humans; D006813:Humidity; D055115:Light-Curing of Dental Adhesives / Q000295:instrumentation; D008422:Materials Testing; D011176:Post and Core Technique / Q000295:instrumentation*; D019279:Resin Cements / Q000737:chemistry; D018915:Root Canal Preparation / Q000295:instrumentation / Q000379:methods; D013314:Stress, Mechanical; D013499:Surface Properties; D013696:Temperature; D013997:Time Factors; D014465:Ultrasonics / Q000295:instrumentation; D014732:Vibration
chemical_list: C581302:Clearfil SA; D003764:Dental Materials; D019279:Resin Cements; C009753:fiberglass
keywords: fiber post; operator experience; post removal; pull-out; weight change