title: A no-contact vibration device for measuring implant stability.
abstract: OBJECTIVE
  Monitoring implant stability is an important factor in determining the long-term success rate of implants. Periotest values and resonance frequency analysis have been widely used for this purpose, but these indicators mainly reflect the mobility and/or stability of implants. Thus, a no-contact electromagnetic vibration device was developed and tested for monitoring both tooth mobility and periodontal tissue conditions. The aim of this study was to evaluate the ability of a no-contact electromagnetic vibration device to measure implant stability under various peri-implant conditions using mechanical parameters.
  
  
  METHODS
  The device consisted of three components: the vibrator, detector, and analyzer. The mechanical parameters resonant frequency, elastic modulus, and coefficient of viscosity were used to measure simulated atrophic bone defects in periodontal tissues.
  
  
  RESULTS
  The resonant frequency and the elastic modulus increased with an increase in supporting bone height. In contrast, the coefficient of viscosity decreased with bone height. Values for the three parameters for the formed urethane models were lower than those for the urethane models.
  
  
  CONCLUSIONS
  A no-contact electromagnetic vibration device may be capable of monitoring implant stability, and mechanical parameters may be useful for assessing the condition of periodontal tissues around implants.
authors.affiliation: Department of Endodontics, Dental Research Center and Implant Dentistry, Division of Advanced Dental Treatment, Nihon University School of Dentistry, Tokyo, Japan. hayashi-m@dent.nihon-u.ac.jp
authors.forename: Makoto
authors.initials: M
authors.lastname: Hayashi
authors.forename: Chiaki
authors.initials: C
authors.lastname: Kobayashi
authors.forename: Hidehiro
authors.initials: H
authors.lastname: Ogata
authors.forename: Masaru
authors.initials: M
authors.lastname: Yamaoka
authors.forename: Bunnai
authors.initials: B
authors.lastname: Ogiso
mesh_terms: D000054:Acceleration; D016301:Alveolar Bone Loss / Q000473:pathology; D000539:Alveolar Process / Q000473:pathology; D015921:Dental Implants; D003764:Dental Materials / Q000737:chemistry; D017268:Dental Prosthesis Retention; D055119:Elastic Modulus; D054459:Elasticity Imaging Techniques / Q000295:instrumentation; D004574:Electromagnetic Fields; D004867:Equipment Design; D005583:Fourier Analysis; D006801:Humans; D008953:Models, Anatomic; D014025:Titanium / Q000737:chemistry; D014520:Urethane / Q000737:chemistry; D014732:Vibration; D014783:Viscosity
chemical_list: D015921:Dental Implants; D003764:Dental Materials; D014520:Urethane; D014025:Titanium