title: Sealing ability of mineral trioxide aggregate and Portland cement for furcal perforation repair: a protein leakage study.
abstract: The purpose of this study was to compare the sealing ability of gray mineral trioxide aggregate (GMTA), white MTA (WMTA), and both white and gray Portland cement as furcation perforation repair materials. A total of 120 human mandibular first molars were used. After root canal obturation and preparation of furcal perforations the specimens were randomly divided into four groups of 25 teeth each. In groups A, B, C, and D furcation perforations were filled with WMTA, GMTA, white Portland cement, and type II Portland cement, respectively. Ten teeth were used as positive controls with no filling materials in the perforations and 10 teeth with complete coverage with two layers of nail varnish were used as negative controls. A protein leakage model utilizing 22% bovine serum albumin (BSA) was used for evaluation. Leakage was noted when color conversion of the protein reagent was observed. The controls behaved as expected. Leakage was found in the samples from group A (WMTA), group B (GMTA), and in the two other groups (white and gray Portland cement). There were no statistically significant differences between GMTA and WMTA or white and gray Portland cement, but significant differences were observed between the MTA groups and the Portland cement groups. It was concluded that Portland cements have better sealing ability than MTA, and can be recommended for repair of furcation perforation if the present results are supported by other in vivo and in vitro studies.
authors.affiliation: Department of Endodontics, Tabriz Dental School, Tabriz University (Medical Sciences), Tabriz, Iran. shahriar_shahi@yahoo.com
authors.forename: Shahriar
authors.initials: S
authors.lastname: Shahi
authors.forename: Saeed
authors.initials: S
authors.lastname: Rahimi
authors.forename: Maryam
authors.initials: M
authors.lastname: Hasan
authors.forename: Vahab
authors.initials: V
authors.lastname: Shiezadeh
authors.forename: Majid
authors.initials: M
authors.lastname: Abdolrahimi
mesh_terms: D017607:Aluminum Compounds / Q000627:therapeutic use; D000818:Animals; D017610:Calcium Compounds / Q000627:therapeutic use; D002417:Cattle; D003738:Dental Cements / Q000627:therapeutic use; D003762:Dental Instruments / Q000009:adverse effects; D003763:Dental Leakage / Q000517:prevention & control; D004338:Drug Combinations; D006801:Humans; D007202:Indicators and Reagents; D008963:Molar / Q000293:injuries; D010087:Oxides / Q000627:therapeutic use; D012387:Root Canal Filling Materials / Q000627:therapeutic use*; D018915:Root Canal Preparation / Q000009:adverse effects / Q000295:instrumentation; D012710:Serum Albumin, Bovine; D017640:Silicates / Q000627:therapeutic use; D018677:Tooth Injuries / Q000628:therapy*; D014092:Tooth Root / Q000293:injuries*
chemical_list: D017607:Aluminum Compounds; D017610:Calcium Compounds; D003738:Dental Cements; D004338:Drug Combinations; D007202:Indicators and Reagents; D010087:Oxides; D012387:Root Canal Filling Materials; D017640:Silicates; C472247:accelerated Portland cement; C086631:mineral trioxide aggregate; D012710:Serum Albumin, Bovine