title: Portland cement with additives in the repair of furcation perforations in dogs.
abstract: OBJECTIVE
  To evaluate the use of Portland cements with additives as furcation perforation repair materials and assess their biocompatibility.
  
  
  METHODS
  The four maxillary and mandibular premolars of ten male mongrel dogs (1-1.5 years old, weighing 10-15 kg) received endodontic treatment (n=80 teeth). The furcations were perforated with a round diamond bur (1016 HL). The perforations involved the dentin, cementum, periodontal ligament, and alveolar bone. A calcium sulfate barrier was placed into the perforated bone to prevent extrusion of obturation material into the periradicular space. The obturation materials MTA (control), white, Type II, and Type V Portland cements were randomly allocated to the teeth. Treated teeth were restored with composite resin. After 120 days, the animals were sacrificed and samples containing the teeth were collected and prepared for histological analysis.
  
  
  RESULTS
  There were no significant differences in the amount of newly formed bone between teeth treated with the different obturation materials (p=0.879).
  
  
  CONCLUSIONS
  Biomineralization occurred for all obturation materials tested, suggesting that these materials have similar biocompatibility.
authors.affiliation: Postgraduate Program in Plastic Surgery, UNIFESP, Sao Paulo, Brazil.
authors.forename: José Dias da
authors.initials: JD
authors.lastname: Silva Neto
authors.forename: Taylor Brandão
authors.initials: TB
authors.lastname: Schnaider
authors.forename: Alfredo
authors.initials: A
authors.lastname: Gragnani
authors.forename: Anderson Paulo de
authors.initials: AP
authors.lastname: Paiva
authors.forename: Neil Ferreira
authors.initials: NF
authors.lastname: Novo
authors.forename: Lydia Masako
authors.initials: LM
authors.lastname: Ferreira
mesh_terms: D017607:Aluminum Compounds / Q000627:therapeutic use; D000818:Animals; D001641:Bicuspid; D001672:Biocompatible Materials / Q000737:chemistry / Q000627:therapeutic use; D001861:Bone Regeneration; D017610:Calcium Compounds / Q000627:therapeutic use; D002133:Calcium Sulfate / Q000737:chemistry / Q000627:therapeutic use; D003738:Dental Cements / Q000737:chemistry / Q000627:therapeutic use*; D004285:Dogs; D004338:Drug Combinations; D017823:Furcation Defects / Q000188:drug therapy*; D008297:Male; D008422:Materials Testing; D010087:Oxides / Q000627:therapeutic use; D012387:Root Canal Filling Materials / Q000737:chemistry / Q000627:therapeutic use*; D012389:Root Canal Obturation / Q000379:methods*; D017640:Silicates / Q000627:therapeutic use; D013997:Time Factors; D014092:Tooth Root / Q000293:injuries*
chemical_list: D017607:Aluminum Compounds; D001672:Biocompatible Materials; D017610:Calcium Compounds; D003738:Dental Cements; D004338:Drug Combinations; D010087:Oxides; D012387:Root Canal Filling Materials; D017640:Silicates; C086631:mineral trioxide aggregate; D002133:Calcium Sulfate