title: Microshear bond strength evaluation of surface pretreated zirconia ceramics bonded to dentin.
abstract: OBJECTIVE
  To comparatively assess the micro shear bond strength (MSBS) of dentin bonded surface pre-treated zirconia ceramics.
  
  
  METHODS
  Zirconia blocks were sectioned into 50 cubical blocks. The blocks were further categorized into five groups (n = 10 each). Group I: No treatment was performed on zirconia samples; Group II: The zirconia samples were sand-blasted; Group III: Group II + etched with 9.8% of hydrofluoric (HF) acid for 60 s; Group IV: The sandblasted zirconia samples were selectively infiltrated with low fusing porcelain; and Group V: Group IV + etched using 9.8% HF acid gel. The zirconia specimens were then bonded to dentin samples, and the samples were tested for MSBS evaluation using universal testing machine.
  
  
  RESULTS
  The MSBS of all the four experimental groups shows greater value than group I. Among the experimental groups, group V and group IV do not show any statistical significant difference, whereas the mean MSBS of groups IV and V were statistically greater than group III and group II. However, groups I, II, and III do not show any statistical significant difference in mean MSBS values between them.
  
  
  CONCLUSIONS
  Selective infiltration etching of zirconia ceramics provides the highest bond strength with resin cement.
authors.affiliation: Department of Conservative Dentistry and Endodontics, Madha Dental College, Kunrathur, Chennai, India.
authors.forename: Shenbagakuttalam
authors.initials: S
authors.lastname: Anand
authors.affiliation: Department of Conservative Dentistry and Endodontics, Madha Dental College, Kunrathur, Chennai, India.
authors.forename: Ambrose Vedamanickam Rajesh
authors.initials: AVR
authors.lastname: Ebenezar
authors.affiliation: Department of Prosthodontics, Rajah Muthiah Dental College and Hospital, Annamalai University, Chidambaram, India.
authors.forename: Nirupa
authors.initials: N
authors.lastname: Anand
authors.affiliation: Department of Conservative Dentistry and Endodontics, SRM Dental, Ramapuram, Chennai, India.
authors.forename: Kothandaraman
authors.initials: K
authors.lastname: Rajkumar
authors.affiliation: Department of Conservative Dentistry and Endodontics, SRM Dental, Ramapuram, Chennai, India.
authors.forename: Sekar
authors.initials: S
authors.lastname: Mahalaxmi
authors.affiliation: Department of Conservative Dentistry and Endodontics, Mahatma Gandhi Post Graduate Institute of Dental Sciences, Pondicherry, India.
authors.forename: Narasimhan
authors.initials: N
authors.lastname: Srinivasan
keywords: Hydrofluoric acid etching; Zirconia blocks; sandblasting; selective infiltration etching