title: Radiographic evaluation of furcal perforations sealed with different materials in dogs' teeth.
abstract: OBJECTIVE
  The objective of this work was to evaluate, using radiographic images, the behavior of four materials used to repair root perforations in dogs' teeth.
  
  
  METHODS
  Second and third premolars of 6 dogs were used. The 48 teeth were randomly divided into 4 groups (n=12) and the perforations were sealed with one of the following materials: MTA, AH Plus, Vitremer and gutta-percha. Dogs were submitted to general anesthesia, teeth were radiographed and pulp was accessed. Perforations were done, at the maximum curve of the pulp floor, sealed and the accessed coronal cavity was filled with glass ionomer cement (Vidrion R). After 90 days, the dogs were sacrificed and the last x-ray image was taken. Images were analyzed for the presence/absence of periodontal lesions at the perforation region. Data were analyzed statistically by chi-square test at 5% significance level.
  
  
  RESULTS
  There were no statistically significant differences (p>0.05) among AH Plus, Vitremer and gutta-percha groups. MTA produced the smallest number of periodontal lesions (p<0.05).
  
  
  CONCLUSIONS
  It may be concluded that none of the tested materials was able to preserve the integrity of the periodontal tissues in the furcation region, and the use of MTA resulted in the least formation of adjacent periodontal bone lesions revealed by the radiographic comparisons.
authors.affiliation: Endodontic Integrated Center, Passo Fundo, RS, Brazil.
authors.forename: José Roberto
authors.initials: JR
authors.lastname: Vanni
authors.forename: Alvaro
authors.initials: A
authors.lastname: Della-Bona
authors.forename: José Antônio Poli de
authors.initials: JA
authors.lastname: Figueiredo
authors.forename: Giovani
authors.initials: G
authors.lastname: Pedro
authors.forename: Douglas
authors.initials: D
authors.lastname: Voss
authors.forename: Patrícia Maria Poli
authors.initials: PM
authors.lastname: Kopper
mesh_terms: D000818:Animals; D016009:Chi-Square Distribution; D004285:Dogs; D017823:Furcation Defects / Q000000981:diagnostic imaging / Q000628:therapy*; D005899:Glass Ionomer Cements / Q000627:therapeutic use*; D007049:Iatrogenic Disease / Q000517:prevention & control; D008422:Materials Testing; D011861:Radiography, Dental; D012387:Root Canal Filling Materials / Q000627:therapeutic use*; D014092:Tooth Root / Q000000981:diagnostic imaging / Q000293:injuries*
chemical_list: D005899:Glass Ionomer Cements; D012387:Root Canal Filling Materials