title: Comparative Evaluation of Shear Bond Strength of Orthodontic Brackets on Pretreatment with CPPACP, Fluor Protector and Phosflur: An In-vitro Study.
abstract: OBJECTIVE
  The purpose of this study is to evaluate bond strength, bracket tooth interface of Orthodontic brackets that are bonded for fixed Orthodontic treatment procedure on pretreatment with CPPACP, Fluor Protector and Phosflur. The goal is to assess the adhesive remnants following application of these remineralizing agents using Adhesive Remnant Index.
  
  
  METHODS
  Two hundred freshly extracted premolar teeth each divided into Control, CPP-ACP, Fluor Protector and Phosflur. Teeth were pretreated with these agents prior to bonding procedure. Shear Bond Strength was tested using a Universal Testing Machine. A jig was attached to upper jaw of the machine. The acrylic block containing the embedded teeth was secured in the lower jaw of the machine such that the bracket base of the teeth parallel the direction of the shear force at a crosshead speed of 1 mm/minute until bracket failure. The force required to dislodge the bracket was recorded.
  
  
  RESULTS
  Mean Shear bond strength value is highest for Phosflur (15.3658 ± 2.4546 ) followed by Fluor Protector , CPP-ACP and lowest for Control (7.0462 ± 0.8838 MPa).
  
  
  CONCLUSIONS
  Phosflur, Fluor protector,CPP-ACP have comparable Shear bond strength values in comparison to control.
authors.affiliation: Senior Lecturer, Department of Orthodontics, Institute of Dental Sciences , Sector-8, Kalinganagar, Ghatikia, Bhubaneswar-751030, Odisha, India .
authors.forename: Sumita
authors.initials: S
authors.lastname: Mishra
keywords: CPP-ACP; Fluor Protector; Phosflur; Remineralizing agents; Shear bond strength; Universal testing machine