Abstract
It is a well known fact that the use of osseointegrated dental implants reflect the latest line of thinking with regard to prosthetic restoration. Even if a fixed superstructure is preferred in most cases, an overdenture on the implant is accepted with several advantages. However, prosthetic management of the overdenture has two problems: firstly, the difference in the amount of tissue displacement between tooth and mucosa, and secondly, the presence of soft tissue under the denture base. The displacenent of implant is less than that of the tooth. Therefore, the difference is a crucial factor for the management of implant-retained overdenture.
