Peri-implant Health of Dental Implants in the Posterior Region; an Evaluation After 10 Years

* Background Adaptation of a dental implant and its restoration to the existing anatomy in the region of a missing tooth is presumed to be a reliable procedure. During the follow-up it appears that peri-implant bone level is stable, peri-implant soft tissues are healthy and patients are satisfied with the result. However, the number of 10-years studies on implants in the posterior region of maxilla and mandible is limited and much more studies with longer follow-up periods are needed to confirm the positive outcomes. * Main research question The primary objective of the study is marginal bone level changes by radiological assessments at 10-years follow-up. Secondary objectives are implant and restoration survival, condition of peri- implant mucosa and patients' satisfaction. * Design The study design is an observational study of a group of patients which were treated 10 years ago with a dental implant and an implant-supported restoration because of a missing tooth in the posterior region. Outcomes: primary outcome is the change in marginal peri-implant bone level 10 years after placing the definitive restoration. Secondary outcome measures will be implant and restoration survival, peri-implant mucosa health and patients' satisfaction using a questionnaire. * Expected results Stable peri-implant bone levels, stable peri-implant soft tissue levels, high implant and restoration survival rate and satisfied patients.