Akademik Veri Yönetim Sistemi
The 48th Annual EPA Congress/ The 27th Scientific TPID Congress, Nevşehir, Türkiye, 11 - 13 Eylül 2025, ss.101, (Özet Bildiri)
INTRODUCTION: Implant-supported restorations are widely used for the rehabilitation of single-tooth losses due to their high success rates. In recent years, hybrid abutment crown restorations, which combine the advantages of both cement retained and screw-retained systems, have gained popularity. These restorations consist of monolithic crowns fabricated from various materials using CAD-CAM technology and cemented extraorally onto titanium bases, featuring a screw access hole on the occlusal surface. The crowns are screw-retained on the implant, and the screw channel is sealed with composite resin. This case series presents the prosthetic rehabilitation process of four patients with single-tooth replacements using zirconia hybrid abutment crowns following the conventional osseointegration period after implant placement.
Case Description: Impressions for single-tooth implants were taken using a closed-tray technique with a silicone impression material, followed by model fabrication. Based on the gingival height and the cervico-occlusal distance on the model, the most suitable titanium bases were selected. The crown portion of the restorations was then designed using CAD software and milled monolithically from zirconia ceramic. After clinical try-in, the crowns were glazed and adhesively cemented onto the titanium bases with resin cement. Subsequently, the hybrid abutment crowns were seated intraorally, and the abutment screws were torqued to the recommended value. The screw access holes were sealed with composite resin. Throughout a six-month follow-up period, no complications were observed, and patients reported satisfaction with both function and esthetics.
Discussion: Conventional fixed partial dentures require preparation of adjacent teeth, while implants preserve tooth structure and bone, making them preferred. Hybrid abutment crowns, cemented extraorally and screw-retained, reduce cement-related risks and allow easy removal. They are ideal for limited spaces, offering good retention and long-term success. This case series showed zirconia hybrid abutment crowns effectively treated single-tooth losses without complications, representing a viable alternative for such restorations.
Keywords: Computer-Aided Design, Implant-Supported Dental Prosthesis, Permanent Dental Restorations, Single Tooth Dental Implants