Anja Zembic1,2, Alexander Otto Hermann Philipp3,4, Christoph Hans Franz Hämmerle1, Arnold Wohlwend5, Irena Sailer6. 1. Clinic of Fixed and Removable Prosthodontics and Dental Material Science, Center for Dental Medicine, University of Zurich, Zurich, Switzerland. 2. Department of Oral Implantology and Prosthetic Dentistry, Academic Center for Dentistry Amsterdam, MOVE Research Institute, Amsterdam, The Netherlands. 3. Effretikon, Switzerland. 4. Clinic for Preventive Dentistry, Periodontology and Cariology, Center for Dental Medicine, University of Zurich, Zurich, Switzerland. 5. Schellenberg, Liechtenstein. 6. Clinic of Fixed Prosthodontics and Biomaterials, School of Dental Medicine, University of Geneva, Geneva, Switzerland.
Abstract
BACKGROUND: Clinical studies on zirconia abutments report very good survival rates and biological and technical results, but few have an observation period of more than 5 years. PURPOSE: The aim of this study was to assess the long-term performance of customized zirconia implant abutments supporting all-ceramic crowns. MATERIALS AND METHODS: Twenty-seven patients receiving 54 single implants were included (25 incisors, 14 canines, 15 premolars in both jaws). Yttria-stabilized zirconia abutments were screwed to the implants with a defined torque. All-ceramic crowns were adhesively cemented onto the abutments. The implants, abutments, and crowns were clinically and radiographically examined after 11 years of use. Modified United States Public Health Service (USPHS) criteria were used to assess technical outcomes: fracture of abutment/crown framework/veneering ceramic, loosening of abutment screw/crown, marginal adaptation, anatomical form, occlusal wear, and abutment fit. The biological parameters were pocket probing depth, plaque control record, bleeding on probing, papilla index, and gingival/mucosal recession at implants and neighboring natural teeth. The cumulative success rate of abutments and crowns was calculated by the Kaplan-Meier method. The results of the USPHS criteria were analyzed descriptively. RESULTS: Sixteen patients with 31 zirconia abutments were examined at 11.3 (±0.9) years after implantation. No abutment or crown was lost. The cumulative success rate was 96.3% for abutments and 90.7% for crowns. Two abutment screws loosened, and three crowns exhibited minor chipping. There were no biological complications. CONCLUSIONS: Customized zirconia single implant abutments exhibited excellent long-term outcomes in anterior and premolar regions.
BACKGROUND: Clinical studies on zirconia abutments report very good survival rates and biological and technical results, but few have an observation period of more than 5 years. PURPOSE: The aim of this study was to assess the long-term performance of customized zirconia implant abutments supporting all-ceramic crowns. MATERIALS AND METHODS: Twenty-seven patients receiving 54 single implants were included (25 incisors, 14 canines, 15 premolars in both jaws). Yttria-stabilized zirconia abutments were screwed to the implants with a defined torque. All-ceramic crowns were adhesively cemented onto the abutments. The implants, abutments, and crowns were clinically and radiographically examined after 11 years of use. Modified United States Public Health Service (USPHS) criteria were used to assess technical outcomes: fracture of abutment/crown framework/veneering ceramic, loosening of abutment screw/crown, marginal adaptation, anatomical form, occlusal wear, and abutment fit. The biological parameters were pocket probing depth, plaque control record, bleeding on probing, papilla index, and gingival/mucosal recession at implants and neighboring natural teeth. The cumulative success rate of abutments and crowns was calculated by the Kaplan-Meier method. The results of the USPHS criteria were analyzed descriptively. RESULTS: Sixteen patients with 31 zirconia abutments were examined at 11.3 (±0.9) years after implantation. No abutment or crown was lost. The cumulative success rate was 96.3% for abutments and 90.7% for crowns. Two abutment screws loosened, and three crowns exhibited minor chipping. There were no biological complications. CONCLUSIONS: Customized zirconia single implant abutments exhibited excellent long-term outcomes in anterior and premolar regions.
Authors: Carina B Tanaka; Hossam Harisha; Marta Baldassarri; Mark S Wolff; Hui Tong; Josete B C Meira; Yu Zhang Journal: Ceram Int Date: 2016-05-15 Impact factor: 4.527
Authors: Riccardo D Kraus; Catharina Espuelas; Christoph H F Hämmerle; Ronald E Jung; Irena Sailer; Daniel S Thoma Journal: Clin Oral Implants Res Date: 2022-03-03 Impact factor: 5.021
Authors: Sofia T Lamperti; Karin Wolleb; Christoph H F Hämmerle; Ronald E Jung; Jürg Hüsler; Daniel S Thoma Journal: Clin Oral Implants Res Date: 2022-02-02 Impact factor: 5.021