title: Comparison of the reproducibility of results of a new peri-implantitis assessment system (implant success index) with the Misch classification.
abstract: OBJECTIVE
  The present study was conducted to determine the reproducibility of peri-implant tissue assessment using the new implant success index (ISI) in comparison with the Misch classification.
  
  
  METHODS
  In this descriptive study, 22 cases of peri-implant soft tissue with different conditions were selected, and color slides were prepared from them. The slides were shown to periodontists, maxillofacial surgeons, prosthodontists and general dentists, and these professionals were asked to score the images according to the Misch classification and ISI. The intra- and inter-observer reproducibility scores of the viewers were assessed and reported using kappa and weighted kappa (WK) tests.
  
  
  RESULTS
  Inter-observer reproducibility of the ISI technique between the prosthodontists-periodontists (WK=0.85), prosthodontists-maxillofacial surgeons (WK=0.86) and periodontists-maxillofacial surgeons (WK=0.9) was better than that between general dentists and other specialists. In the two groups of general dentists and maxillofacial surgeons, ISI was more reproducible than the Misch classification system (WK=0.99 versus WK non-calculable, WK=1 and WK=0.86). The intra-observer reproducibility of both methods was equally excellent among periodontists (WK=1). For prosthodontists, the WK was not calculable via any of the methods.
  
  
  CONCLUSIONS
  The intra-observer reproducibility of both the ISI and Misch classification techniques depends on the specialty and expertise of the clinician. Although ISI has more classes, it also has higher reproducibility than simpler classifications due to its ability to provide more detail.
authors.affiliation: Department of Periodontics, Dental School, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
authors.forename: Mohammad Reza
authors.initials: MR
authors.lastname: Abrishami
authors.affiliation: Department of Community Oral Health (COH) Clinical Epidemiology, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
authors.forename: Siamak
authors.initials: S
authors.lastname: Sabour
authors.affiliation: Private Practice, Isfahan, Iran.
authors.forename: Maryam
authors.initials: M
authors.lastname: Nasiri
authors.affiliation: Department of Periodontics, Dental School, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
authors.forename: Reza
authors.initials: R
authors.lastname: Amid
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: Bone loss; Classification; Peri-implantitis; Reproducibility