title: Effect of Mechanical and Chemical Root Surface Treatment on the Shear Bond Strength of Intracanal Post in Primary Anterior Teeth: An In vitro Study.
abstract: BACKGROUND
  Aesthetic restoration of severely mutilated primary anterior teeth still remains as a special challenge to paediatric dentist. Due to increased parent's concern for aesthetic rehabilitation for their children, paediatric dentist are in a state to improve technique sensitive restorative procedure to improve aesthetic rehabilitation in children.
  
  
  OBJECTIVE
  The purpose of the study was to evaluate the effect of different root surface treatment on the shear bond strength of glass fibre reinforced post in primary anterior teeth using Universal Testing Machine (UTM).
  
  
  METHODS
  Twenty single rooted primary anterior teeth were selected. Coronal portions of the teeth were sectioned transversally 2 mm above the Cemento-Enamel Junction (CEJ) and specimens were treated endodontically and obturated using metapex. Then the specimens were randomly divided into four groups. Group 1: Control group; Group 2: Chemical surface treatment of the root with 2% chlorhexidine; Group 3: Mechanical surface treatment with mushroom-shaped undercut; Group 4: Combination of mechanical and chemical surface treatments. Samples were tested for shear bond strength. ANOVA and Post-hoc Tukey test were used for statistical analysis using SPSS version 20.0.
  
  
  RESULTS
  Combination of mechanical and chemical surface treatments exhibited higher mean shear bond strength (8.41 MPa), followed by mechanical surface treatment (4.68 MPa), chemical surface treatment (3.92 MPa) and control group (2.76 MPa).
  
  
  CONCLUSIONS
  Mechanical and chemical surface treatments together led to a improved shear bond strength and increased the retention of the post to the root surface.
authors.affiliation: Postgraduate Student, Department of Paediatric and Preventive Dentistry, Saveetha University , Chennai, Tamil Nadu, India .
authors.forename: Dhanalakshmi
authors.initials: D
authors.lastname: Ravikumar
authors.affiliation: Senior Lecturer, Department of Paediatric and Preventive Dentistry, Saveetha University , Chennai, Tamilnadu, India .
authors.forename: Shanmugaavel
authors.initials: S
authors.lastname: Karthikeyan
authors.affiliation: Professor, Department of Paediatric and Preventive Dentistry, Saveetha University , Chennai, Tamil Nadu, India .
authors.forename: Emg
authors.initials: E
authors.lastname: Subramanian
authors.affiliation: Associate Professor, Department of Paediatric and Preventive Dentistry, Saveetha University , Chennai, Tamil Nadu, India .
authors.forename: Deepa
authors.initials: D
authors.lastname: Gurunathan
keywords: Glass fibre post; Retention of post; Root surface treatments