title: Shear bond strength of composite resin bonded to preformed metal crowns for primary molars using a universal adhesive and two different surface treatments: an in vitro study.
abstract: OBJECTIVE
  This was to determine the shear bond strength of composite resin bonded to preformed metal crowns with a new adhesive. Buccal surfaces of the crowns were roughened by two different methods to increase retention.
  
  
  METHODS
  Typodont mandibular second primary molars (38) were divided into two groups (19 per group). Preformed metal crowns were cemented to the teeth with glass-ionomer cement. To enhance retention, buccal surfaces of the crowns in group I were roughened with cross-cut carbide burs (SS White #56); crowns in group II were sandblasted (aluminium oxide, 50 µm). Scotchbond Universal Adhesive (3 M-ESPE) was used to bond composite resin to the crowns. A universal testing machine tested the maximum shearing force withstood by the veneered composite surfaces.
  
  
  RESULTS
  Sandblasted crowns demonstrated significantly higher resistance (p = 0.001) to shearing force (324.4 N) than did the crowns that were roughened with a bur (234.2 N).
  
  
  CONCLUSIONS
  Chairside veneering of composite resin to pretreated crowns could be a feasible, aesthetically pleasing, and an economical option in paediatric dentistry.
authors.affiliation: Department of Pedodontics, Dr. D. Y. Patil Dental College and Hospital, Sant Tukaram Nagar, Pimpri, Pune, 411018, Maharashtra, India. snehapatil.bds@gmail.com.
authors.forename: S S
authors.initials: SS
authors.lastname: Patil
authors.affiliation: Department of Pedodontics, Dr. D. Y. Patil Dental College and Hospital, Sant Tukaram Nagar, Pimpri, Pune, 411018, Maharashtra, India.
authors.forename: U R
authors.initials: UR
authors.lastname: Kontham
authors.affiliation: Department of Pedodontics, Dr. D. Y. Patil Dental College and Hospital, Sant Tukaram Nagar, Pimpri, Pune, 411018, Maharashtra, India.
authors.forename: A
authors.initials: A
authors.lastname: Kamath
authors.affiliation: Department of Orthodontics, Nair Hospital Dental College, Dr. A. L. Nair Road, Mumbai, 400008, Maharashtra, India.
authors.forename: R
authors.initials: R
authors.lastname: Kontham
mesh_terms: D000269:Adhesives / Q000737:chemistry*; D000537:Aluminum Oxide / Q000737:chemistry; D003188:Composite Resins / Q000737:chemistry*; D003442:Crowns; D003722:Dental Alloys / Q000737:chemistry; D001840:Dental Bonding; D003764:Dental Materials / Q000737:chemistry; D003799:Dental Stress Analysis; D003801:Dental Veneers; D005899:Glass Ionomer Cements / Q000737:chemistry; D006801:Humans; D008422:Materials Testing; D008670:Metals / Q000737:chemistry*; D008963:Molar; D019279:Resin Cements / Q000737:chemistry; D033081:Shear Strength; D013499:Surface Properties; D014094:Tooth, Deciduous
chemical_list: D000269:Adhesives; D003188:Composite Resins; D003722:Dental Alloys; D003764:Dental Materials; D005899:Glass Ionomer Cements; D008670:Metals; D019279:Resin Cements; C041330:Scotchbond; D000537:Aluminum Oxide
keywords: Adhesive; Preformed metal crown; Primary molar; Veneer