The prevalence of peri-implant diseases around subcrestally placed implants: A cross sectional study.

OBJECTIVES To evaluate the prevalence of peri-implant health, peri-implant mucositis or peri-implantitis for subcrestally placed implants (1-3 mm) on the short-, medium- and long-term. MATERIAL & METHODS Two hundred patients were enrolled in this cross-sectional study that were treated and screened during regular maintenance visits at one university center. A total of 657 implants were evaluated. Peri-implant health and diseases were assessed according to predefined case definitions. Binary logistic regression was used to assess the correlation with local and systemic factors. RESULTS After a median function time of 9.36 ±6.44 years (range: 1 - 26 years), the prevalence of peri-implant mucositis and peri-implantitis was 66.5% and 15.0%, at the patient level, corresponding to 62.6% and 7.5%, at the implant level, respectively. Peri-implantitis was significantly associated with patients' history of periodontitis (odds ratio, OR 5.33). CONCLUSION Peri-implant diseases were a common finding around subcrestally placed implants.