Implant-retained overdenture design for the malpositioned mandibular implants

In the rehabilitation of the edentulous mandible, implant-retained overdenture represents a viable and cost-effective treatment. Successful prosthetic integration of this treatment relies on the accurate 3-dimensional position and angulation of the implant fixtures. If these requirements are not fulfilled, implant malposition occurs and negative effects on the function, esthetics, and structural integrity of the prosthesis may follow. Implant malposition commonly results from poor planning, surgical error, inaccuracies in the radiographic/surgical template fabrication, and the instability of the template during surgery. Potential solutions for implant malposition include surgical re-treatment or prosthetic compensation in the form of an altered design of the final prosthesis. This article presents a prosthetic design of an overdenture for malpositioned implants in the anteroposterior plane. Prosthetic compensations included relocating the attachment mechanism into the bulk of the overdenture with the help of an interconnecting implant bar and a metal reinforcing framework for the overdenture.