title: Marginal Adaptation Evaluation of Biodentine and MTA Plus in "Open Sandwich" Class II Restorations.
abstract: OBJECTIVE
  This study aimed at evaluation of two different commercially available calcium silicate materials (Biodentine and mineral trioxide aggregate [MTA] Plus) used as dentin substitute.
  
  
  METHODS
  Sixty Class II cavities were prepared in extracted mandibular third molars, with margins extending 1 mm below the cementum-enamel junction. The samples were divided into three groups on the basis of dentin substitute used: resin modified glass ionomer cement, Biodentine, and MTA Plus. Cavities were restored with composite resins in an "open sandwich" technique. The samples were subjected to alternate aging in phosphate buffered saline and cyclic loading. Marginal adaptation was evaluated in terms of "continuous margin" at the gingival margin, using a low vacuum scanning electron microscope. Statistical analysis was done with two-way analysis of variance with Holm-Sidak's correction for multiple comparisons.
  
  
  RESULTS
  The glass ionomer group and Biodentine group presented an overall 83% and 91% of continuous margins, with no difference between them. MTA Plus showed least values of continuous margins. Granular deposits were seen over the surface of Biodentine and MTA Plus.
  
  
  CONCLUSIONS
  Biodentine and resin-modified glass ionomer cement, when used as a dentin substitute under composite restorations in open sandwich technique, gave satisfactory marginal adaptation values.
  
  
  CONCLUSIONS
  Contemporary calcium silicate materials can be used as dentin substitute materials in "open sandwich" Class II restorations. This study evaluates the marginal adaptation of Biodentine, MTA Plus, and resin modified glass ionomer cement used as dentin substitutes and reports better adaptation obtained with Biodentine and glass ionomer cement.
authors.affiliation: Department of Conservative Dentistry & Endodontics, Faculty of Dentistry, Jamia Millia Islamia, New Delhi, India.
authors.forename: Vivek
authors.initials: V
authors.lastname: Aggarwal
authors.affiliation: Department of Conservative Dentistry & Endodontics, SGT Dental College, Gurgaon, India.
authors.forename: Mamta
authors.initials: M
authors.lastname: Singla
authors.affiliation: Department of Conservative Dentistry & Endodontics, SGT Dental College, Gurgaon, India.
authors.forename: Suman
authors.initials: S
authors.lastname: Yadav
authors.affiliation: Department of Conservative Dentistry & Endodontics, SGT Dental College, Gurgaon, India.
authors.forename: Harish
authors.initials: H
authors.lastname: Yadav
authors.affiliation: Department of Conservative Dentistry & Endodontics, Faculty of Dentistry, Jamia Millia Islamia, New Delhi, India.
authors.lastname: Ragini
mesh_terms: D017607:Aluminum Compounds; D017610:Calcium Compounds; D004338:Drug Combinations; D006801:Humans; D066298:In Vitro Techniques; D008422:Materials Testing; D008855:Microscopy, Electron, Scanning; D008964:Molar, Third; D010087:Oxides; D017640:Silicates
chemical_list: D017607:Aluminum Compounds; D017610:Calcium Compounds; D004338:Drug Combinations; D010087:Oxides; D017640:Silicates; C086631:mineral trioxide aggregate; C506393:tricalcium silicate