title: Assessment of interleukin-1beta and interleukin-6 in the crevicular fluid around healthy implants, implants with peri-implantitis, and healthy teeth: a cross-sectional study.
abstract: OBJECTIVE
  This study aimed to assess and compare the levels of interleukin-1beta (IL-1β) and interleukin-6 (IL-6) in the crevicular fluid around healthy implants, implants with peri-implantitis, and healthy teeth.
  
  
  METHODS
  This study evaluated 16 dental implants in 8 patients (4 males and 4 females). These patients had at least one healthy implant and one implant with peri-implantitis next to healthy teeth. The crevicular fluid was collected using absorbent cones and transferred to the laboratory. Specimens were evaluated by ELISA for interleukin levels. Data were analyzed using repeated measures ANOVA and Bonferroni tests (P<0.05).
  
  
  RESULTS
  Levels of IL-1β in the crevicular fluid around implants with peri-implantitis were significantly higher than around healthy implants (P=0.002); the latter was significantly higher than around healthy teeth (P=0.015). A significant difference was found in the level of IL-6 in the crevicular fluid around implants with peri-implantitis and healthy implants (P=0.049) and also between implants with peri-implantitis and healthy teeth (P<0.001).
  
  
  CONCLUSIONS
  Within the limitations of this study, significant differences exist in the levels of IL-1β and IL-6 in the crevicular fluid of implants with peri-implantitis, healthy implants, and healthy teeth. More studies with larger sample sizes in different populations are necessary.
authors.affiliation: Department of Periodontics, Tehran University of Medical Sciences, Tehran, Iran. ; Dental Implant Research Center, Tehran University of Medical Sciences, Tehran, Iran.
authors.forename: Siamak
authors.initials: S
authors.lastname: Yaghobee
authors.affiliation: Department of Periodontics, Tehran University of Medical Sciences, Tehran, Iran.
authors.forename: Afshin
authors.initials: A
authors.lastname: Khorsand
authors.affiliation: Department of Periodontics, Tehran University of Medical Sciences, Tehran, Iran.
authors.forename: Amir Alireza
authors.initials: AA
authors.lastname: Rasouli Ghohroudi
authors.affiliation: Private Practice, Tehran, Iran.
authors.forename: Khashayar
authors.initials: K
authors.lastname: Sanjari
authors.affiliation: Department of Periodontics, Dental School, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
authors.forename: Mahdi
authors.initials: M
authors.lastname: Kadkhodazadeh
keywords: Dental implants; Gingival crevicular fluid; Interleukin-1beta; Interleukin-6; Peri-implantitis