Purpose: To assess oral functioning,patients satisfaction,condition of peri-implant tissues and implant survival in oral cancer patients with mandibular overdentures on primary implants up to 14 years after insertion.Methods: In a prospective cohort of 164 oral cancer patients endosseous dental implants were inserted in the interforaminal region of the mandible during ablative surgery of the tumour. All patients were evaluated using questionnaires and clinical assessments during a final assessment in 2012.