title: In vitro evaluation of the sealing ability of MTA used for the repair of furcation perforations with and without the use of an internal matrix.
abstract: OBJECTIVE
  To evaluate the effect of matrix on mineral trioxide aggregate (MTA) when used to repair furcal perforations.
  
  
  METHODS
  Forty-five human molars with furcal perforations were randomly divided into 3 groups and repaired with MTA either alone or over a barrier (calcium sulfate or Collaplug). Eight teeth without perforations provided negative control samples. After assessing repair quality, 1 mol/L glucose solution was used as the tracer to detect the leakage. The concentration of leaked glucose was measured after 1, 2, 4, 7, 15, and 20 days using a glucose oxidase method.
  
  
  RESULTS
  No significant difference in either leakage or overfilling was found between the groups with Collaplug and MTA alone (P > .05). Although no overfilling was detected in the group with calcium sulfate, that group had the most leakage (P < .05).
  
  
  CONCLUSIONS
  Neither of the 2 internal matrices improved the sealing ability and reduced the incidence of overfilling simultaneously.
authors.affiliation: State Key Laboratory of Oral Diseases, Sichuan University, Chengdu, China.
authors.forename: Ling
authors.initials: L
authors.lastname: Zou
authors.forename: Jun
authors.initials: J
authors.lastname: Liu
authors.forename: Shihai
authors.initials: S
authors.lastname: Yin
authors.forename: Wei
authors.initials: W
authors.lastname: Li
authors.forename: Jun
authors.initials: J
authors.lastname: Xie
mesh_terms: D017607:Aluminum Compounds / Q000627:therapeutic use*; D017610:Calcium Compounds / Q000627:therapeutic use*; D002133:Calcium Sulfate / Q000627:therapeutic use; D003762:Dental Instruments / Q000009:adverse effects; D003763:Dental Leakage / Q000517:prevention & control*; D004338:Drug Combinations; D005119:Extravasation of Diagnostic and Therapeutic Materials / Q000517:prevention & control; D006801:Humans; D008963:Molar; D010087:Oxides / Q000627:therapeutic use*; D012387:Root Canal Filling Materials / Q000627:therapeutic use*; D018915:Root Canal Preparation / Q000009:adverse effects / Q000295:instrumentation; D017640:Silicates / Q000627:therapeutic use*; D018677:Tooth Injuries / Q000628:therapy*; D014092:Tooth Root / Q000293:injuries*
chemical_list: D017607:Aluminum Compounds; D017610:Calcium Compounds; D004338:Drug Combinations; D010087:Oxides; D012387:Root Canal Filling Materials; D017640:Silicates; C086631:mineral trioxide aggregate; D002133:Calcium Sulfate