Patients were examined at baseline before implant placement as well as at 2 months

Patients were examined at baseline before implant placement as well as at 2 months, 1 year, 3 years and 5 years after implant overdenture insertion to assess the implant, attachment system, and denture status. All maintenance events were recorded in the patients file.
Furthermore, patients were asked to complete 2 patient-based outcome questionnaires at 2 months, 1 year, 3 years and 5 years after implant overdenture insertion. The first patient satisfaction questionnaire used a Visual Analogue scale (VAS) consisting of the following denture-related variables all except speech being assessed separately for both the maxillary and mandibular dentures: y y y a a a