title: Shear bond strength and microleakage results for three experimental self-etching primer compositions for pit and fissure sealing.
abstract: OBJECTIVE
  This in vitro study evaluated the shear bond strength (SBS) and microleakage of three experimental self-etching primers for pit and fissure sealing.
  
  
  METHODS
  The material used three formulations of an experimental fissure primer (EFP) applied without phosphoric acid etching (EFP-1/EFP-2/EFP-3) and one control group with sealant application after 30 s of acid etching. Four groups of sealants (n = 40 specimens/group) were tested for SBS, and a failure analysis was conducted after 1-day water storage, 3-month water storage, and 5000-fold thermocycling. In addition, microleakage was tested.
  
  
  RESULTS
  The SBSs of the EFPs (range 8.2 MPa (standard deviation 4.2) to 15.4 MPa (5.4)) were generally significantly lower than those of conventional fissure sealing (range 15.6 MPa (4.4) to 19.1 MPa (6.2)). The SBS of EFP-3 was better than that of the EFP-1 or EFP-2 formulations. Microleakage was significantly lower in the control group (1.1 %) than in the EFP-1 (3.8 %) and lower than in EFP-3 (7.7 %) group. In the (multiple) linear regression analysis, material and aging significantly influenced SBS.
  
  
  CONCLUSIONS
  The SBS of EFP-3 was 15 to 32 % lower than it was for the corresponding controls.
  
  
  CONCLUSIONS
  The SBS is lower, but the main potential benefit of this new approach is a reduced application time in clinical practice.
authors.affiliation: Department of Conservative Dentistry and Periodontology, Ludwig-Maximilians-University of Munich, Poliklinik für Zahnerhaltung und Parodontologie, Goethestraße 70, 80336, Munich, Germany.
authors.forename: Sebastian
authors.initials: S
authors.lastname: Birlbauer
authors.affiliation: Department of Conservative Dentistry and Periodontology, Ludwig-Maximilians-University of Munich, Poliklinik für Zahnerhaltung und Parodontologie, Goethestraße 70, 80336, Munich, Germany.|Department of Pediatric Dentistry, Chang Gung Memorial Hospital, Taipei, Taiwan.
authors.forename: Meng-Ling
authors.initials: ML
authors.lastname: Chiang
authors.affiliation: Department of Conservative Dentistry and Periodontology, Ludwig-Maximilians-University of Munich, Poliklinik für Zahnerhaltung und Parodontologie, Goethestraße 70, 80336, Munich, Germany.
authors.forename: Christoph
authors.initials: C
authors.lastname: Schuldt
authors.affiliation: Department of Conservative Dentistry and Periodontology, Ludwig-Maximilians-University of Munich, Poliklinik für Zahnerhaltung und Parodontologie, Goethestraße 70, 80336, Munich, Germany.
authors.forename: Vinay
authors.initials: V
authors.lastname: Pitchika
authors.affiliation: Department of Conservative Dentistry and Periodontology, Ludwig-Maximilians-University of Munich, Poliklinik für Zahnerhaltung und Parodontologie, Goethestraße 70, 80336, Munich, Germany.
authors.forename: Reinhard
authors.initials: R
authors.lastname: Hickel
authors.affiliation: Department of Conservative Dentistry and Periodontology, Ludwig-Maximilians-University of Munich, Poliklinik für Zahnerhaltung und Parodontologie, Goethestraße 70, 80336, Munich, Germany.
authors.forename: Nicoleta
authors.initials: N
authors.lastname: Ilie
authors.affiliation: Department of Conservative Dentistry and Periodontology, Ludwig-Maximilians-University of Munich, Poliklinik für Zahnerhaltung und Parodontologie, Goethestraße 70, 80336, Munich, Germany. jkuehn@dent.med.uni-muenchen.de.
authors.forename: Jan
authors.initials: J
authors.lastname: Kühnisch
mesh_terms: D000134:Acid Etching, Dental / Q000379:methods*; D000268:Adhesiveness; D001840:Dental Bonding; D003763:Dental Leakage; D003799:Dental Stress Analysis; D006801:Humans; D066298:In Vitro Techniques; D008422:Materials Testing; D008964:Molar, Third; D010756:Phosphoric Acids / Q000737:chemistry; D010895:Pit and Fissure Sealants / Q000737:chemistry*; D033081:Shear Strength; D013499:Surface Properties
chemical_list: D010756:Phosphoric Acids; D010895:Pit and Fissure Sealants
keywords: Microleakage; Pit and fissure sealant; Shear bond strength