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SURVIVAL RATE OF IMPLANT-SUPPORTED, SINGLE-TOOTH RESTORATIONS BASED ON ZIRCONIA OR METAL ABUTMENT IN PATIENTS WITH
Mandana Hosseini1, Nils Worsaae2, Klaus Gotfredsen1
1Section of Oral Rehabilitation, Department of Odontology, Faculty of Health Science, University of Copenhagen, Copenhagen N-2200, Denmark.
The Journal of Evidence-Based Dental Practice
|May 31, 2024
Summary
Zirconia abutments and all-ceramic crowns show high survival rates for single-tooth implants, offering a reliable alternative to metal restorations. These restorations provide favorable biological and aesthetic outcomes with minimal technical complications.
Area of Science:
- Dental Implantology
- Prosthodontics
- Biomaterials Science
Background:
- Single-tooth implants are a common treatment for tooth agenesis.
- Evaluating the long-term performance of different abutment and crown materials is crucial for clinical success.
- Zirconia and all-ceramic restorations are increasingly used as alternatives to traditional metal-based materials.
Purpose of the Study:
- To compare the survival rates of zirconia versus metal abutments in single-tooth implants.
- To assess the clinical outcomes, including survival, biological, technical, and aesthetic factors, of all-ceramic versus metal-ceramic crowns over a 5-year period.
Main Methods:
- A prospective clinical study involving patients with tooth agenesis was conducted with a 5-year follow-up.
- Evaluated variables included implant and restoration survival, marginal bone level, soft tissue indices, and complications.
- Aesthetic outcomes and patient-reported outcomes were also recorded, with statistical analysis using mixed models.
Main Results:
- Implant and restoration survival rates were high (100% and 96%, respectively) over 5 years.
- No significant biological differences were observed between zirconia and metal abutments.
- All-ceramic crowns showed superior aesthetics (color, morphology), while metal-ceramic crowns had better marginal adaptation; technical complications were infrequent.
Conclusions:
- Zirconia-based single-tooth restorations demonstrate reliability comparable to metal-based restorations.
- These restorations offer favorable biological and aesthetic outcomes.
- Zirconia presents a viable alternative with a low incidence of technical complications.
