title: The effect of various backfilling techniques on the fracture resistance of simulated immature teeth performed apical plug with Biodentine.
abstract: OBJECTIVE
  To evaluate the fracture resistance of simulated immature teeth that had been backfilled using different materials after using Biodentine as the apical plug material.
  
  
  METHODS
  Seventy-five single-rooted teeth were divided into five groups (n = 15). The 15 teeth in group 1 served as a negative control group and received no treatment. The remaining 60 teeth were instrumented to a #6 Peeso reamer to obtain a standard internal diameter of 1.5 mm. The apical 4 mm of 60 teeth was filled with Biodentine. The backfilling was then performed on each group as follows: group 2--no backfilling (positive control), group 3--gutta-percha, group 4--fiber post, and group 5--Biodentine. Specimens were then subjected to fracture testing. The force required to fracture each specimen was recorded, and the data were statistically analyzed.
  
  
  RESULTS
  The mean fracture values of groups 1 and 4 were significantly higher than groups 2, 3, and 5 (P < 0.05). The values of groups 3 and 5 were significantly higher than group 2 (P < 0.05).
  
  
  CONCLUSIONS
  The backfilling with fiber post after an apical Biodentine plug provided the highest fracture resistance among all experimental groups.
authors.affiliation: Department of Endodontics, Faculty of Dentistry, Erciyes University, Kayseri, Turkey.
authors.forename: Hüseyin Sinan
authors.initials: HS
authors.lastname: Topçuoğlu
authors.affiliation: Department of Endodontics, Faculty of Dentistry, Erciyes University, Kayseri, Turkey.
authors.forename: Bertan
authors.initials: B
authors.lastname: Kesim
authors.affiliation: Department of Endodontics, Faculty of Dentistry, Erciyes University, Kayseri, Turkey.
authors.forename: Salih
authors.initials: S
authors.lastname: Düzgün
authors.affiliation: Department of Endodontics, Faculty of Dentistry, Erciyes University, Kayseri, Turkey.
authors.forename: Öznur
authors.initials: Ö
authors.lastname: Tuncay
authors.affiliation: Department of Restorative Dentistry, Faculty of Dentistry, Erciyes University, Kayseri, Turkey.
authors.forename: Sezer
authors.initials: S
authors.lastname: Demirbuga
authors.affiliation: Department of Pedodontics, Faculty of Dentistry, Erciyes University, Kayseri, Turkey.
authors.forename: Gamze
authors.initials: G
authors.lastname: Topçuoğlu
mesh_terms: D017610:Calcium Compounds; D003799:Dental Stress Analysis; D006171:Gutta-Percha; D006801:Humans; D066298:In Vitro Techniques; D007180:Incisor; D011176:Post and Core Technique; D012387:Root Canal Filling Materials; D018915:Root Canal Preparation / Q000379:methods*; D017640:Silicates; D014082:Tooth Fractures / Q000517:prevention & control*
chemical_list: D017610:Calcium Compounds; D012387:Root Canal Filling Materials; D017640:Silicates; C506393:tricalcium silicate; D006171:Gutta-Percha