Book

Description

Edentulous patients are often associated with decreased in the masticatory function, loss in vertical dimension, speech impairment and poor esthetics due to loss in facial musculature support. The complete removable denture was the traditional way for treating such cases. However, denture adjustment should be done regularly to compensate the progressive tissue changes. In completely edentulous patients the implant supported overdentures is a common treatment plan which could improve oral function and comfort for edentulous patients. The concept of rehabilitation of full arch on four implants is a useful therapy in the treatment of an edentulous patient. The quadrilateral design showed enhanced results in regard to survival and success rate and minimal strain compared to curved (three implants) or linear (two implants) designs. Tilting the distal implant giving us various advantages as the implant reach a more posterior position so the length of the cantilever is reduced. Also it preserves related vital structures, avoid bone grafting and increases the implant primary stability through using longer implants that due to increased implant-to-bone contact area, the inter-implant space was increased which lead to better distribution of the load.