title: Effect of Ultraviolet Irradiation of the Implant Surface on Progression of Periimplantitis--A Pilot Study in Dogs.
abstract: OBJECTIVE
  The objective of this study was to investigate morphologically the progression of periimplantitis around an ultraviolet (UV)-light-irradiated implant in dogs.
  
  
  METHODS
  Pure titanium implants (3.3 mm in diameter and 8 mm long) were placed into dog jawbone bilaterally. Implants on one side were irradiated with UV light for 15 minutes using a photodevice immediately before placement (UV group), whereas those on the other side were not irradiated (non-UV group). Osseointegration was confirmed 90 days after implant placement by radiography. Experimental periimplantitis was induced by the application of dental floss over 90 days. Clinical and radiographic examination and micro-computed tomography (micro-CT) were performed after 90 and 180 days, and bone resorption was measured. The bone-implant interface in tissue sections was examined by light microscopy.
  
  
  RESULTS
  Bone resorption around the UV-irradiated implant was less pronounced than around the non-UV-irradiated implant in the ligature-induced periimplantitis model. Tissue section images revealed no contact and partial destruction at the bone-implant interface.
  
  
  CONCLUSIONS
  Within the limitations of this preliminary investigation, it is suggested that UV-light-irradiated implants suppress spontaneous progression of periimplantitis.
authors.affiliation: *Graduate Student, Department of Prosthodontics and Oral Rehabilitation, Graduate School of Dentistry, Kanagawa Dental University, Yokosuka, Japan. †Associate Professor, Dental Anatomy Division, Department of Oral Science, Graduate School of Dentistry, Kanagawa Dental University, Yokosuka, Japan. ‡Assistant Professor, Department of Prosthodontics and Oral Rehabilitation, Graduate School of Dentistry, Kanagawa Dental University, Yokosuka, Japan. §Associate Professor, Division of Circulation Control for Dentistry, Department of Oral Science, Graduate School of Dentistry, Kanagawa Dental University, Yokosuka, Japan. ¶Assistant Professor, Department of Radiopraxis science, Graduate School of Dentistry, Kanagawa Dental University, Yokosuka, Japan. ‖Professor, Department of Prosthodontics and Oral Rehabilitation, Graduate School of Dentistry, Kanagawa Dental University, Yokosuka, Japan.
authors.forename: Kouken
authors.initials: K
authors.lastname: Ishii
authors.forename: Masato
authors.initials: M
authors.lastname: Matsuo
authors.forename: Noriyuki
authors.initials: N
authors.lastname: Hoshi
authors.forename: Shun-Suke
authors.initials: SS
authors.lastname: Takahashi
authors.forename: Ryota
authors.initials: R
authors.lastname: Kawamata
authors.forename: Katsuhiko
authors.initials: K
authors.lastname: Kimoto
mesh_terms: D000818:Animals; D003758:Dental Implantation, Endosseous / Q000009:adverse effects / Q000379:methods; D004285:Dogs; D005260:Female; D057873:Peri-Implantitis / Q000000981:diagnostic imaging / Q000517:prevention & control*; D010865:Pilot Projects; D011861:Radiography, Dental; D014467:Ultraviolet Therapy / Q000379:methods; D055114:X-Ray Microtomography