title: Effect of citric acid irrigation on the fracture resistance of endodontically treated roots.
abstract: OBJECTIVE
  The aim of this study was to evaluate the effect of citric acid irrigation on root fracture in different concentrations and at various time exposures on root fracture.
  
  
  METHODS
  Forty-eight human mandibular incisors with similar dimensions were selected. The specimens were decoronated, then divided into 6 groups as follows: A group without instrumentation and filling (G1) and the 5 other groups with canal preparation and irrigation of distilled water (G2), 10% citric acid for 1 min (G3), 50% citric acid for 1 min (G4), 10% citric acid for 10 min (G5), and 50% citric acid for 10 min (G6). In the experimental groups, the canals were obturated and subjected to the strength test. Statistical analysis was performed using Kruskal-Wallis test (P = 0.05).
  
  
  RESULTS
  G6 showed the highest fracture resistance (629.97 N), and G3 showed the lowest fracture resistance (507.76 N). However, there was no statistically significant difference among the groups.
  
  
  CONCLUSIONS
  The results of this study suggest that use of citric acid is safe in terms of fracture resistance.
authors: Department of Endodontics, Faculty of Dentistry, Izmir Katip Celebi University, Izmir, Turkiye.
authors: Hakan
authors: H
authors: Arslan
authors: Department of Restorative Dentistry, Faculty of Dentistry, Akdeniz University, Antalya, Turkiye.
authors: Cagatay
authors: C
authors: Barutcigil
authors: Department of Endodontics, Faculty of Dentistry, Ataturk University, Erzurum, Turkiye.
authors: Ertugrul
authors: E
authors: Karatas
authors: Department of Endodontics, Faculty of Dentistry, Erciyes University, Kayseri, Turkiye.
authors: Huseyin Sinan
authors: HS
authors: Topcuoglu
authors: Department of Endodontics, Faculty of Dentistry, Ataturk University, Erzurum, Turkiye.
authors: Kubra Yesildal
authors: KY
authors: Yeter
authors: Department of Endodontics, Faculty of Dentistry, Sifa University, Izmir, Turkiye.
authors: Ibrahim
authors: I
authors: Ersoy
authors: Department of Endodontics, Faculty of Dentistry, Ataturk University, Erzurum, Turkiye.
authors: Leyla Benan
authors: LB
authors: Ayrancı
keywords: Citric acid; endodontics; fracture resistance; root canal