J Korean Dent Sci.  2022 Jun;15(1):84-91. 10.5856/JKDS.2022.15.1.84.

A Digitally Designed All-on-4 Restoration with Screwmentable Concept

• Park K
• Han JS
• Lee JH

• KMID: 2532421
• DOI: http://doi.org/10.5856/JKDS.2022.15.1.84

Abstract

An all-on-4 restoration allows edentulous patients to use a fixed prosthesis with a minimum number of implants. These implant-supported fixed complete dentures have traditionally been fabricated as screw-retained or cementretained prostheses. However, it is difficult to passively fit the long-span full-arch prosthesis using the screw-retained type restoration, and predictable retrievability is not obtained with the cement-retained type. This case report describes a prosthesis fabricated using a combination of the two retention types. The screwmentable method allows the implant-supported fixed complete denture to achieve a passive fit at the connection with retrievability. In addition, a framework with an optimized size was designed by using digital dental technology.

Keyword

Computer-aided design; Computer-aided manufacturing; Dental prosthesis retention; Implant supported denture; Prosthesis design