title: An in vitro Evaluation of Microleakage of Posterior Teeth Restored with Amalgam, Composite and Zirconomer - A Stereomicroscopic Study.
abstract: BACKGROUND
  Numerous restorative materials are being used in dentistry to achieve adequate strength and restore aesthetics. However, a perfect ideal restorative material has still eluded dentist. Dental amalgam is versatile material with self-sealing property, but is unaesthetic. Other restorative materials like, composites require conservative preparation, but exhibits polymerisation shrinkage resulting in microleakage. To overcome these drawbacks a high strength restorative material reinforced with ceramic and zirconia fillers known as zirconomer has been introduced. The aim of this study was to evaluate the micro-leakage of these three different restorative materials.
  
  
  METHODS
  Thirty non-carious human permanent first and second molars were utilized in this study. Class I cavities were prepared on the occlusal surface; cavities were then restored with amalgam, composite and zirconomer as per manufacture's instruction. All samples were stored for 24 hours in distilled water followed by thermocycling. The entire tooth surface was painted with two coats of varnish to within 1mm of the restoration margins. The teeth were immersed in dye. Teeth were sectioned and observed under stereomicroscope.
  
  
  RESULTS
  In this study the zirconomer exhibited the highest micro leakage as compared to composite and amalgam but composite having higher micro leakage as compared to amalgam and lower micro leakage as compared to zirconomer.
  
  
  CONCLUSIONS
  Even though composite and amalgam are being marketed aggressively and new material like zirconomer are on origin, amalgam still proves to be one of the best materials.
authors.affiliation: Post Graduate Student, Department of Conservative Dentistry and Endodontics, Darshan Dental College , Udaipur, India .
authors.forename: Mayank U
authors.initials: MU
authors.lastname: Patel
authors.affiliation: Reader, Department of Conservative Dentistry and Endodontics, Darshan Dental College , Udaipur, India .
authors.forename: Sandhya Kapoor
authors.initials: SK
authors.lastname: Punia
authors.affiliation: Professor & H.O.D., Department of Conservative Dentistry and Endodontics, Darshan Dental College , Udaipur, India .
authors.forename: Surekha
authors.initials: S
authors.lastname: Bhat
authors.affiliation: Reader, Department of Conservative Dentistry and Endodontics, Darshan Dental College , Udaipur, India .
authors.forename: Gautam
authors.initials: G
authors.lastname: Singh
authors.affiliation: Reader, Department of Conservative Dentistry and Endodontics, Darshan Dental College , Udaipur, India .
authors.forename: Rahul
authors.initials: R
authors.lastname: Bhargava
authors.affiliation: Post Graduate Student, Department of Conservative Dentistry and Endodontics, Darshan Dental College , Udaipur, India .
authors.forename: Pravesh
authors.initials: P
authors.lastname: Goyal
authors.affiliation: Senior Lecturer, Department of Community and Preventive Dentistry, Darshan Dental College , Udaipur, India .
authors.forename: Swapnil
authors.initials: S
authors.lastname: Oza
authors.affiliation: Post Graduate Student, Department of Pedodontics and Preventive Dentistry, Darshan Dental College , Udaipur, India .
authors.forename: Chirag M
authors.initials: CM
authors.lastname: Raiyani
keywords: Aesthetics; Dye penetration; Thermocycling; White amalgam