Technical and biological complications/failures with single crowns and fixed partial dentures on implants: a 10-year prospective cohort study.

Technical and biological complications/failures with single crowns and fixed partial dentures on implants: a 10-year prospective cohort study.
2005
Bragger U, Karoussis I, Persson R, Pjetursson B, Salvi G, Lang N.
Clin Oral Implants Res. 2005 Jun;16(3):326-34.
PubMed
You can view the abstract online. A subscription is required to view the full text or it can be purchased online.
Abstract
Objectives: To assess prospectively over 10 years the incidences of technical and/or biological complications and failures occurring in a cohort of consecutive partially edentulous patients with fixed reconstructions on implants of the ITI((R)) Dental Implant System.
Methods: Eighty-nine patients were available, 34 (38.2%) were male, 55 (61.8%) were female. At the 10-year examination (range 8-12 years), they were 58.9 years old (range 28-88 years).
Results: Single crowns (SC): 48 patients had been restored with 69 SC on 69 implants. Five of the implants with the crowns were lost because of biological failures. Two crowns (2.9%) were remade because of technical failures. Total failure amounted to seven (10%). Implant borne fixed partial dentures (I-I FPD): In 29 patients who had been restored with 33 implant borne suprastructures, the total number of failed I-I FPD was 2 (6.1%). Tooth-implant borne fixed partial dentures (I-T FPD): In 21 patients, 22 mixed tooth-implant borne reconstructions were constructed. The number of failed FPD reached 7 (31.8%). Statistically significantly fewer biological failures occurred with I-I FPD compared with the I-T FPDs (ANOVA, Bonferroni, P=0.022). The I-T FPDs experienced statistically significantly more frequent technical failures compared with the other two groups of suprastructures (P=0.003, 0.031). Consequences of complications: The occurrence of loss of retention as a complication increased the odds ratio (OR) to 17.6 (P<0.001) to end up in a technical failure. Similarly, the event of a porcelain fracture increased the OR for the suprastructure to be a failure at 10 years to 11.0 (P</=0.004). Treatment of periimplantitis increased the OR to 5.44 (P</=0.011) to result in a biological failure compared with implants in which this type of treatment was not applied.
Conclusion: The three groups of suprastructures demonstrated marked differences in their patterns of failures and complications. Complications increased the risk for failure. Support by CRF, University of Berne, Switzerland. To cite this article: Bragger U, Karoussis I, Persson R, Pjetursson B, Salvi G, Lang NP. Technical and biological complications/failures with single crowns and fixed partial dentures on implants: a 10-year prospective cohort study. Clin. Oral Impl. Res. doi: 10.1111/j.1600-0501.2005.01105.x.
PMID: 15877753 [PubMed - in process]