title: Comparison of different obturation techniques for primary molars by digital radiography.
abstract: OBJECTIVE
  The purpose of this study was to compare six methods of root canal filling in primary mandibular second molars via digital radiography.
  
  
  METHODS
  A total of 239 canals were prepared and obturated with zinc-oxide eugenol paste. Obturation methods compared were: anesthetic syringe; NaviTip syringe; pressure syringe; tuberculin syringe; lentulo spiral; and packing with a plugger. The canals were evaluated in photostimulated phosphor radiographs for length of obturation, presence of voids, and number and sum of void sizes. The data were analyzed using chi-square, Kruskal-Wallis and Mann-Whitney tests.
  
  
  RESULTS
  There were significant differences between all groups in the length of obturation (P>.01) and presence of voids (P<.001). The lentulo and tuberculin syringe groups, respectively, showed the best and worst results for length of obturation. Significant differences were also found in the number of voids (P<.001) and mean sum of void sizes in the coronal (P<.001) and middle third (P=.003). For the number and size of the voids, the NaviTip group showed the best results.
  
  
  CONCLUSIONS
  Lentulo produced the best results in terms of length of obturation, while NaviTip syringe produced the best results in controlling paste extrusion from the apical foramen and having the smallest void size and lowest number of voids.
authors.affiliation: Department of Pediatric Dentistry, School of Dentistry, Shiraz University of Medical Sciences, Shiraz, Iran. memarpour@sums.ac.ir
authors.forename: Mahtab
authors.initials: M
authors.lastname: Memarpour
authors.forename: Shoaleh
authors.initials: S
authors.lastname: Shahidi
authors.forename: Razieh
authors.initials: R
authors.lastname: Meshki
mesh_terms: D000293:Adolescent; D002648:Child; D006801:Humans; D008963:Molar / Q000000981:diagnostic imaging / Q000473:pathology*; D011670:Pulpectomy / Q000379:methods*; D019252:Radiography, Dental, Digital / Q000379:methods*; D012389:Root Canal Obturation / Q000295:instrumentation* / Q000379:methods; D018709:Statistics, Nonparametric; D014094:Tooth, Deciduous / Q000000981:diagnostic imaging / Q000473:pathology*; D015035:Zinc Oxide-Eugenol Cement
chemical_list: D015035:Zinc Oxide-Eugenol Cement