title: Volumetric analysis of root fillings using spiral computed tomography: an in vitro study.
abstract: OBJECTIVE
  To analyse volumetrically using spiral computed tomography (SCT) the efficacy of various techniques to fill root canals.
  
  
  METHODS
  Root canals in 40 maxillary central incisors were instrumented with K-files to size 60 and the volume of the canal measured using SCT. The teeth were divided into four groups of 10 each and root filled by lateral compaction, Thermafil, Obtura II and System B techniques, respectively. AH plus was used as sealer with all techniques. The filled volume in each canal was measured using SCT and the percentage of obturated volume (POV) was calculated. The data were statistically analysed using Kruskal-Wallis test and Mann-Whitney U-test.
  
  
  RESULTS
  The four groups were comparable in canal volume. The overall POV was 80.4%, 93.3%, 84.8% and 93.7% for lateral compaction, Thermafil, Obtura II and System B, respectively (P < 0.05).
  
  
  CONCLUSIONS
  The greatest POV was obtained with System B and Thermafil. Voids were seen in all root fillings.
authors.affiliation: Department of Conservative Dentistry & Endodontics, Maduravoyal, Chennai, Tamilnadu, India.
authors.forename: R
authors.initials: R
authors.lastname: Anbu
authors.forename: S
authors.initials: S
authors.lastname: Nandini
authors.forename: N
authors.initials: N
authors.lastname: Velmurugan
mesh_terms: D003786:Dental Pulp Cavity / Q000000981:diagnostic imaging*; D004853:Epoxy Resins; D006801:Humans; D021621:Imaging, Three-Dimensional / Q000379:methods; D007180:Incisor; D016062:Porosity; D012387:Root Canal Filling Materials; D012389:Root Canal Obturation / Q000379:methods*; D018915:Root Canal Preparation / Q000379:methods; D036542:Tomography, Spiral Computed
chemical_list: D004853:Epoxy Resins; D012387:Root Canal Filling Materials; C534916:epoxy resin-based root canal sealer