Inter-rater agreement in the diagnosis of mucositis and peri-implantitis.

J Clin Periodontol. 2014 Sep;41(9):927-33. doi: 10.1111/jcpe.12291. Epub 2014 Aug 6.

Inter-rater agreement in the diagnosis of mucositis and peri-implantitis.



The objective was to assess the inter-rater agreement in the diagnosis of mucositis and peri-implantitis.


Adult patients with ≥ 1 dental implant were eligible. Three operators examined the patients. One examiner allocated the patients to three groups of nine as follows: nine implants with peri-implantitis, nine implants with mucositis, and 9 implants with healthy mucosa. Each examiner recorded on all 27 patients (one implant per patient) recessions, probing depth, bleeding on probing, suppuration, keratinized tissue depth and bone loss, leading to a final diagnosis of mucositis, peri-implantitis or healthy mucosa. Examiners were independent and blinded to each other.


Fleiss k-statistic with quadratic weight in the diagnosis of peri-implantitis and mucositis was 0.66 [CI95%: 0.45-0.87]. A complete agreement was obtained only in 14 cases (52%). Fleiss k-statistics in bleeding on probing and bone loss were respectively 0.31 [CI95%: 0.20-0.41] and 0.70 [CI95%: 0.45-0.94]. Intra-class correlation coefficients for recession, probing depth and keratinized tissue depth were respectively 0.69 [CI95%: 0.62-0.75], 0.54 [CI95%: 0.44-0.63] and 0.56 [CI95%: 0.27-0.77].


The inter-rater agreement in the diagnosis of peri-implant disease was qualified as merely good. This could also be due in part to the unclear definition of peri-implantitis and mucositis.

© 2014 John Wiley & Sons A/S. Published by John Wiley & Sons Ltd.


dental implant; diagnosis; inter-rater agreement; mucositis; peri-implantitis

PMID: 25041651 [PubMed]
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