title: Comparing gray and white mineral trioxide aggregate as a repair material for furcation perforation: an in vitro dye extraction study.
abstract: BACKGROUND
  Furcation perforation can have a negative impact on the prognosis of the affected tooth by compromising the attached apparatus. Hence these perforations require immediate repair. A variety of materials have been suggested for repair, of that MTA is the most promising material. The purpose of this study was to compare the ability of Gray and White MTA to seal furcation perforations using a dye extraction method under spectrophotometer.
  
  
  METHODS
  A total of 60 permanent mandibular molars were randomly divided into four experimental groups of 15 samples each as follows: Group A: Perforation repaired with White MTA. Group B: Perforation repaired with Gray MTA. Group C: Perforation left unsealed (positive). Group D: without perforation (negative). Dye extraction was performed using full concentration nitric acid. Dye absorbance was measured at 550 nm using spectrophotometer. The data analyzed using one-way-Anova Ratio and Unpaired t-test showing statistically significance difference among the groups.
  
  
  RESULTS
  It was seen that Group D samples without perforation showed least absorbance followed by Group A (perforation repaired with White MTA) and Group B (perforation repaired with Gray MTA). Group C (perforation left unsealed) showed highest absorbance.
  
  
  CONCLUSIONS
  The White and Gray Mineral Trioxide Aggregate performed similarly as a furcation perforation repair material. There was no significant difference between the Gray MTA and White MTA.
authors.affiliation: Senior Lecturer, Department of Conservative Dentistry & Endodontics, College of Dental Sciences , Manipur, Ahmedabad, India .
authors.forename: Nishtha
authors.initials: N
authors.lastname: Patel
authors.affiliation: Senior Lecturer, Department of Oral & Maxillofacial Surgery, College of Dental Sciences , Manipur, Ahmedabad, India .
authors.forename: Kiran
authors.initials: K
authors.lastname: Patel
authors.affiliation: Professor, Department of Conservative Dentistry & Endodontics, Subharati Dental College , Meerut, India .
authors.forename: Suheel Manzoor
authors.initials: SM
authors.lastname: Baba
authors.affiliation: Reader, Department of Conservative Dentistry & Endodontics, Subharati Dental College , Meerut, India .
authors.forename: Shikha
authors.initials: S
authors.lastname: Jaiswal
authors.affiliation: Professor and Head of Department, Department of Pedodontics and Preventive Dentistry, College of Dental Sciences , Manipur, Ahmedabad, India .
authors.forename: Karthik
authors.initials: K
authors.lastname: Venkataraghavan
authors.affiliation: Post-Graduate Student, Department of Oral & Maxillofacial Surgery, College of Dental Sciences , Manipur, Ahmedabad, India .
authors.forename: Mehul
authors.initials: M
authors.lastname: Jani
keywords: Collacote; Furcation perforation; Gray MTA; Spectrophotometer; White MTA