Till about three decades ago conventional complete as well as removable partial dentures was the only option to restore lost teeth , except for the short span edentulous areas where fixed partial dentures could be given . There have been various types of implants and different materials which have been used in past without much success.The development of titanium implants has been a major breakthrough in dental implantology.Conventional dentures have many disadvantages .Retention ,stability and support leave much to be desired in these dentures.Moreover a large area coverage is required.This adversely affects mastication ,phonetics and the appreciation of taste.Introduction of the concept of osseointegration using titanium implants was a major breakthrough in the field of implant dentistry .The retention ,stability and support could be vastly improved.Such overdentures occupy much less space.Implant denture is a far better choice than a removable conventional denture.The book gives an insight into the "past to present" of implant overdenture with their rationale,treatment planning & adv/disadvantages that would be of great help to clinicians and academicians worldwide.