Implantology.  2019 Mar;23(1):16-24. 10.32542/implantology.2019002.

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

  • 1Department of Prosthodontics, Dental Research Institute, Institute of Translational Dental Sciences, School of Dentistry, Pusan National University, Yangsan, Korea.


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.


Dental implant; Implant-supported fixed dental prostheses; Retrievability; Residual cementd

MeSH Terms

Dental Implants
Dental Prosthesis*
Follow-Up Studies
Prostheses and Implants
Dental Implants
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