title: A comparative evaluation of shear bond strength of different pits and fissure sealants: an in vitro study.
abstract: OBJECTIVE
  The aim of this study was to determine and compare the shear bond strength of three different pits and fssure sealants to enamel namely, Delton, Clinpro and Z350 Filtek fowable composite.
  
  
  METHODS
  Ninety permanent molars were divided into three groups of 30 each. Their proximal surfaces were prepared and stored in 37°C ± 5°C normal saline for 24 hours. Sealant buttons were prepared. The specimens were tested in a shear mode (Lloyds LR100K) at a crosshead speed of 0.5 mm/min. The mean and standard deviations were subjected to an analysis of variance.
  
  
  RESULTS
  The mean shear bond strength of samples of Delton was 10.33 MPa; Clinpro was 8.51 MPa and Z350 Filtek fowable was 12.17 MPa. The mean strength of Delton was signifcantly higher as compared to Clinpro whereas the mean strength of Z350 Filtek was signifcantly higher as compared to Delton and Clinpro (Student t-test, p < 0.001).
  
  
  CONCLUSIONS
  Z350 Filtek fowable composite had maximum shear bond strength than Delton FS sealant followed by Clinpro sealant. Clinical signifcance: In this study, we compare the bond strength of three pits and fssure sealant, Clinpro yielded lower bond strength than Delton. This outcome can be described due to the presence of fllers in Delton, since these particles increase the resistance of the material to abrasion and also increase the mechanical resistance of the material.
authors.affiliation: Senior Lecturer, Department of Pedodontics and Preventive Dentistry Saraswati Dental College and Hospital, Lucknow, Uttar Pradesh, India e-mail: nitinpedopost@yahoo.in.
authors.forename: Nitin
authors.initials: N
authors.lastname: Singh
authors.affiliation: Senior Lecturer, Department of Conservative Dentistry and Endodontics, Dr. Hedgewar Smruti Runna Sewa Mandal's Dental College and Hospital, Hingoli, Maharashtra, India.
authors.forename: Govind
authors.initials: G
authors.lastname: Agrawal
authors.affiliation: Reader, Department of Oral and Maxillofacial Pathology, Sree Sai Dental College and Research Institute, Srikakulam, Andhra Pradesh, India.
authors.forename: Av
authors.initials: A
authors.lastname: Subhash
authors.affiliation: Reader, Department of Oral and Maxillofacial Pathology, Sree Sai Dental College and Research Institute, Srikakulam, Andhra Pradesh, India.
authors.forename: S
authors.initials: S
authors.lastname: Suneela
authors.affiliation: Professor and Head, Department of Prosthodontics, VYWS Dental College and Hospital, Amravati, Maharashtra, India.
authors.forename: Aparna S
authors.initials: AS
authors.lastname: Barabde
authors.affiliation: Reader, Department of Prosthodontics, Army College of Dental Sciences, Secunderabad, Andhra Pradesh, India.
authors.forename: G Ajay
authors.initials: GA
authors.lastname: Kumar
mesh_terms: D000134:Acid Etching, Dental / Q000379:methods; D017438:Bisphenol A-Glycidyl Methacrylate / Q000737:chemistry; D003188:Composite Resins / Q000737:chemistry; D001840:Dental Bonding; D003743:Dental Enamel / Q000648:ultrastructure*; D003799:Dental Stress Analysis / Q000295:instrumentation; D006801:Humans; D055115:Light-Curing of Dental Adhesives / Q000379:methods; D010756:Phosphoric Acids / Q000737:chemistry; D010895:Pit and Fissure Sealants / Q000737:chemistry*; D058105:Polymerization; D033081:Shear Strength; D013314:Stress, Mechanical; D013696:Temperature; D013997:Time Factors
chemical_list: C500418:Clinpro Sealant; D003188:Composite Resins; D010756:Phosphoric Acids; D010895:Pit and Fissure Sealants; C533204:filtek Z350; D017438:Bisphenol A-Glycidyl Methacrylate; C030242:phosphoric acid