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Long-term performance of implant-supported metal-ceramic and all-ceramic single crowns
Peter Rammelsberg1, Justo Lorenzo Bermejo2, Stefanie Kappel1
1University of Heidelberg, Dental School, Department of Prosthodontics, Im Neuenheimer Feld 400, Heidelberg 69120, Germany.
Journal of Prosthodontic Research
|December 21, 2019
Summary
To improve implant-supported crown performance, avoid full-coverage veneers. This strategy significantly reduces chipping and enhances the longevity of dental restorations.
Area of Science:
- Dental Materials Science
- Prosthodontics
- Implant Dentistry
Background:
- Implant-supported single crowns (SCs) are crucial for replacing missing teeth.
- Evaluating the long-term success and failure modes of different crown materials is essential for clinical decision-making.
Purpose of the Study:
- To assess failure rates and chipping incidence in metal-ceramic versus all-ceramic implant-supported single crowns (SCs).
Main Methods:
- A longitudinal study evaluated 652 implant-supported SCs in 404 patients over 12.8 years.
- Crown frameworks included gold alloys, CoCr, zirconia, and lithium disilicate, with various veneering techniques (full-coverage, partial, or monolithic).
Main Results:
- Overall survival rates were 96% at 5 years and 92% at 10 years.
- Lithium disilicate and zirconia SCs showed higher failure rates than metal-ceramic SCs.
- Zirconia and lithium disilicate frameworks, along with full-coverage veneers, were significant risk factors for chipping.
Conclusions:
- Avoiding full-coverage veneers significantly enhances the clinical performance of implant-supported crowns.
- This approach primarily reduces the incidence of chipping, improving restoration durability.
