Abstract – With the advent of predictable implant support and retention, the implant‐supported overdenture (IOD) has become an accepted treatment modality, but some complications could be observed. We present a case report of squamous cell carcinoma developed in an edentulous ridge in relation to bar retaining IOD chronic trauma, in a patient with no history of previous oral cancer. To our knowledge, this is the first case described in the literature and suggests that primary malignancy can appear as a chronic traumatic ulcer and that a high degree of vigilance is required in the follow up of these patients.