Production of accurately fitting full-arch implant frameworks: Part I--Clinical procedures.

The production of a full-arch metal casting that seats passively on multiple implant fixtures is technically a considerable undertaking. Despite the most meticulous attention to detail, this procedure may be impossible to obtain every time with the resources presently available. This article describes possible errors and makes recommendations as to how the clinical steps can, through careful clinical procedures, be controlled. The question of whether to cast in one piece or in multiple sections that are soldered is discussed.

Technique for fabrication of the mandibular denture over the staple bone implant using a permanent heat-cured base.

A technique that uses processed bases to which the semiprecision attachments are attached intraorally has been described. The teeth are cured in heat-cured resin directly to the base. Advantages of using heat-cured processed bases are that (1) the base is accurately related to the attachments; (2) there is direct access to the attachments for joining them to the base; (3) extension, retention, and stability can be evaluated prior to completion of the dentures; and (4) accurate jaw relation recordings can be made due to the accuracy of the fit of the bases.