title: Evaluation of the bond strength of root-end placed mineral trioxide aggregate and Biodentine in the absence/presence of blood contamination.
abstract: OBJECTIVE
  Mineral trioxide aggregate (MTA) has been accepted as an appropriate root-end filling material in endodontic microsurgery because of setting ability in the wet environment. The aim of this study was to assess the bond strength of root-end placed MTA and Biodentine (Septodont, Saint Maur des Fossés, France) in the absence/presence of blood contamination.
  
  
  METHODS
  Forty-eight single-rooted maxillary incisors were used. subsequent to root-end resection and apical preparation using ultrasonic retro-tips, the specimens were randomly separated into two groups according to the root-end filling materials: MTA (Cerkamed Medical Company, Stalowa, Poland) or Biodentine. The specimens were then separated into two subgroups according to storage condition (absence/presence of blood) (n = 12). After obtaining 2.0 ± 0.1 mm slices, push-out tests were performed. Each slice was examined under a stereomicroscope to evaluate the failure mode. The data were analyzed using two-way analysis of variance and Tukey's post hoc test for multiple comparisons. The failure modes were analyzed using the Chi-square test (P = 0.05).
  
  
  RESULTS
  The bond strength was significantly affected by the presence of blood contamination and root-end filling material type (P < 0.001). Biodentine had better bond strength than MTA (P < 0.001). The most common failure type was adhesive failure. According to the Chi-square test, there were no statistically significant differences among the groups (P = 0.394).
  
  
  CONCLUSIONS
  Biodentine had better bond strength values compared to MTA, and the bond strength of both MTA and Biodentine as root-end filling materials was negatively affected by the presence of blood.
authors.affiliation: Department of Oral and Maxillofacial Surgery, Faculty of Dentistry, Izmir Katip Çelebi University, Izmir, Turkiye.
authors.forename: Huseyin
authors.initials: H
authors.lastname: Akcay
authors.affiliation: Department of Endodontics, Faculty of Dentistry, Ataturk University, Erzurum, Turkiye.
authors.forename: Hakan
authors.initials: H
authors.lastname: Arslan
authors.affiliation: Department of Pedodontics, Faculty of Dentistry, Izmir Katip Çelebi University, Izmir, Turkiye.
authors.forename: Merve
authors.initials: M
authors.lastname: Akcay
authors.affiliation: Department of Pedodontics, Faculty of Dentistry, Izmir Katip Çelebi University, Izmir, Turkiye.
authors.forename: Merve
authors.initials: M
authors.lastname: Mese
authors.affiliation: Department of Pedodontics, Faculty of Dentistry, Izmir Katip Çelebi University, Izmir, Turkiye.
authors.forename: Naciye Nur
authors.initials: NN
authors.lastname: Sahin
keywords: Blood; endodontics; microsurgery; mineral trioxide aggregate; tricalcium silicate