title: Healing of apical periodontitis after endodontic treatment: a comparison between a silicone-based and a zinc oxide-eugenol-based sealer.
abstract: OBJECTIVE
  To assess the treatment results up to 1 year after endodontic treatment of apical periodontitis using a silicone-based sealer in comparison with Grossman's sealer, and to compare the results at 3 months after treatment with the 12-month follow-up to assess the prognostic value of a 3-month control.
  
  
  METHODS
  A total of 199 teeth were treated at three centres. The sealer was randomly chosen at the time of filling. Treatment results were evaluated clinically and radiographically 3 and 12 months after root-canal filling. The periapical status was evaluated using the periapical index (PAI).
  
  
  CONCLUSIONS
  Average PAI scores decreased from 3.43 at start to 2.21 at 12 months for Grossman's sealer and from 3.40 to 2.26 for the silicon-based material. No significant difference between the groups at start or any of the follow ups was seen. The 3-month control was adequate in establishing significant healing in both groups. The improvement of the periapical condition continued at the 12-month examination.
authors.affiliation: NIOM, Scandinavian Institute of Dental Materials, Haslum, Norway.
authors.forename: S
authors.initials: S
authors.lastname: Huumonen
authors.forename: M
authors.initials: M
authors.lastname: Lenander-Lumikari
authors.forename: A
authors.initials: A
authors.lastname: Sigurdsson
authors.forename: D
authors.initials: D
authors.lastname: Ørstavik
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D003738:Dental Cements; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D010485:Periapical Periodontitis / Q000628:therapy*; D011446:Prospective Studies; D012387:Root Canal Filling Materials; D012390:Root Canal Therapy; D012828:Silicones; D018709:Statistics, Nonparametric; D013997:Time Factors; D015035:Zinc Oxide-Eugenol Cement
chemical_list: D003738:Dental Cements; D012387:Root Canal Filling Materials; D012828:Silicones; D015035:Zinc Oxide-Eugenol Cement; C465381:roeko seal; C045432:Grossman's sealer