title: A simplified etching technique to improve the adhesion of fiber post.
abstract: OBJECTIVE
  Numerous methods were used to etch the fiber posts to improve its bonding to root canal dentin. Our aim was to evaluate the efficacy of 37% phosphoric acid in etching fiber posts in comparison with 24% hydrogen peroxide.
  
  
  METHODS
  Ninety human maxillary central incisors were taken and post space preparation was done. Ninety fiber posts were taken and divided into three groups (n=30) based on the surface treatment they received (H3PO4, H2O2, distilled water) and each group was further divided (n=10) based on the time period of application (15 seconds, 30 seconds, 60 seconds). All the posts were luted into canals using Rely X UniCem-2. Each tooth was then sectioned into six slices and subjected to push out test. Data obtained was subjected to statistical analysis at P<.05. The surface topography was evaluated using scanning electron microscopy.
  
  
  RESULTS
  Highest bond strength values were noted in 15 seconds etched phosphoric acid group and 60 seconds etched hydrogen peroxide group with no significant difference between two groups. Surface topography revealed complete epoxy layer removal with no damage to its structural integrity in those groups.
  
  
  CONCLUSIONS
  H3PO4 etching for a period of 15 seconds is an effective alternative in improving the adhesion of fiber post to root dentin.
authors.affiliation: Department of Conservative Dentistry and Endodontics, Mamata Dental College, Khammam, Andhra Pradesh, India.
authors.forename: Chandrakanth
authors.initials: C
authors.lastname: Majeti
authors.affiliation: Department of Conservative Dentistry and Endodontics, Mamata Dental College, Khammam, Andhra Pradesh, India.
authors.forename: Chandrasekhar
authors.initials: C
authors.lastname: Veeramachaneni
authors.affiliation: Department of Conservative Dentistry and Endodontics, Mamata Dental College, Khammam, Andhra Pradesh, India.
authors.forename: Pradeep Kumar
authors.initials: PK
authors.lastname: Morisetty
authors.affiliation: Department of Conservative Dentistry and Endodontics, Mamata Dental College, Khammam, Andhra Pradesh, India.
authors.forename: Saggurti Anitha
authors.initials: SA
authors.lastname: Rao
authors.affiliation: Department of Conservative Dentistry and Endodontics, Mamata Dental College, Khammam, Andhra Pradesh, India.
authors.forename: Muralidhar
authors.initials: M
authors.lastname: Tummala
keywords: Bond strength; Fiber posts; Hydrogen peroxide etching; Phosphoric acid etching; Scanning electron microscopy