A debilitating dental condition affecting millions of individuals across the globe is complete edentulism. The introduction of implantolgy has revolutionized dentistry including the overdenture treatment modality with attachments. Dental practitioners and technicians select attachment systems based on their experience and training.The selection of the attaching mechanism for an implant retained over denture depend on: cost effectiveness, amount of retention needed, expected level of oral hygiene, amount of available bone, patient's social status, patient's expectation, maxilla mandibular relationship, inter-implant distance, and status of the antagonistic jaw.