Journal of Prosthodontic Research
Online ISSN : 1883-9207
Print ISSN : 1883-1958
ISSN-L : 1883-1958
Original Articles
Long-term performance of implant-supported metal-ceramic and all-ceramic single crowns
Peter RammelsbergJusto Lorenzo BermejoStefanie KappelAndré MeyerAndreas Zenthöfer
Author information
JOURNAL OPEN ACCESS

2020 Volume 64 Issue 3 Pages 332-339

Details
Abstract

Purpose: To evaluate failure rates and incidence of chipping for metal-ceramic and all-ceramic implant-supported single crowns (SCs).

Methods: Six hundred and fifty-two implant-supported SCs placed in 404 patients (mean age: 57.8 years; 193 male; mean SCs per patient: 1.6) were evaluated up to 12.8 years. The frameworks of the SCs were made from Au alloys (n = 319), CoCr (n = 37), zirconia (n = 286), or lithium disilicate (n = 10). Full-coverage ceramic veneers were placed on 319 Au SCs, 34 CoCr SCs, and 92 zirconia SCs. One hundred and fifty-two monolithic zirconia SCs were not veneered. A partial veneer was placed on the buccal surface only of a further 42 zirconia SCs.

Results: A total of 26 failures were caused by loss of implants (n = 6), ceramic fractures and chipping (n = 15), loosening of the abutment (n = 4), or swallowing of a de-cemented SC (n = 1). Kaplan-Meier analysis revealed a probability of survival of 96% after five years and 92% after 10 years. A greater incidence of failure was observed for lithium disilicate and zirconia SCs than for metal-ceramic SCs (p <.05). Separate analysis of the most frequent complication, chipping (n = 61), revealed that zirconia and lithium disilicate frameworks were significant risk factors for chipping (p < 0.05). Furthermore, a significantly greater incidence of chipping was observed for SCs with full-coverage veneers than for monolithic zirconia SCs and for SCs with partial veneers (p <.05).

Conclusion: Avoidance of full-coverage veneers significantly improves the clinical performance of implant-supported crowns, primarily reduces the incidence of chipping.

Content from these authors

This article cannot obtain the latest cited-by information.

© 2020 Japan Prosthodontic Society

This is an open-access article distributed under the terms of Creative Commons Attribution License 4.0 (CCBY 4.0), which allows users to distribute and copy the material in any format so long as attribution is given to the Japan Prosthodontic Society.
https://creativecommons.org/licenses/by/4.0/
Previous article Next article
feedback
Top