Implant-Supported Fixed Dental Prostheses with New Retention Type Using Zirconia Ball and Nickel-Titanium Spring

Copyright © 2019. The Korean Academy of Oral & Maxillofacial Implantology This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons. org/licenses/by-nc/4.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited. OPEN ACCESS EZ Crown system (EZC), a new retention type implant prosthetic system that has not only easy retrievability but also no complication due to residual cement, was developed to overcome the problems of conventional retention mechanisms (screw-retained, cement-retained, and combined screw-and cement-retained) of implant-supported fixed dental prostheses. In this case report, we introduce clinical experience with a 6-month follow-up of zirconia fixed dental prosthesis fabricated with EZC. Under normal oral function, no removal or fracture of the EZC prosthesis was observed and no inflammatory findings were observed in the peri-implant soft tissue due to residual cement. EZC is expected to be used in various clinical cases in the future.