title: Reliability of 2 implant stability measuring methods in assessment of various periimplant bone loss: an in vitro study with the Periotest and Osstell Mentor.
abstract: OBJECTIVE
  The aim of this in vitro study was to evaluate reliability of the Periotest and Osstell Mentor in assessment of periimplant vertical and circular bone loss.
  
  
  METHODS
  Sixteen dental implants were embedded into acrylic resin blocks. The portion of resin around the implant neck was successively removed to mimic periimplant vertical and circular bone loss. Measurement values of 2 devices were compared by assessing the change of Periotest value (PTV) and Implant Stability Quotient (ISQ) values, by calculating correlation analysis and by means of regression analysis referring to increasing bone loss.
  
  
  RESULTS
  Both devices were able to discriminate differences of circular bone loss. However, PTVs were not noticeably changed in buccal, buccal-mesial, and buccal-mesial-distal bone loss. The differences in buccal and buccal-mesial bone loss were not discriminated by Osstell Mentor. As the range of bone loss was increased, there was a noticeable correlation of the PTV and ISQ values.
  
  
  CONCLUSIONS
  The results of this study suggest that both diagnostic devices for implant stability are useful in detecting the circular bone loss. However, the clinical reliability of both devices for detecting the partial vertical bone loss is low.
authors.affiliation: *Graduate Student, Department of Prosthodontics, School of Dentistry, Chosun University, Gwangju, Republic of Korea. †Professor and Chairman, Implant Center, School of Dentistry, Chosun University, Gwangju, Republic of Korea. ‡Professor and Director, Department of Oral and Maxillofacial Surgery, School of Dentistry, Chosun University, Gwangju, Republic of Korea. §Assistant Professor and Director, Department of Prosthodontics, School of Dentistry, Chosun University, Gwangju, Republic of Korea.
authors.forename: Han-Hee
authors.initials: HH
authors.lastname: Choi
authors.forename: Chae-Heon
authors.initials: CH
authors.lastname: Chung
authors.forename: Su-Gwan
authors.initials: SG
authors.lastname: Kim
authors.forename: Mee-Kyoung
authors.initials: MK
authors.lastname: Son
mesh_terms: D016301:Alveolar Bone Loss / Q000175:diagnosis* / Q000453:epidemiology; D015921:Dental Implants / Q000592:standards*; D017268:Dental Prosthesis Retention / Q000379:methods* / Q000592:standards; D006801:Humans; D066298:In Vitro Techniques; D016348:Osseointegration; D015203:Reproducibility of Results
chemical_list: D015921:Dental Implants