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

• Published in: Clinical oral implants research 2005-06, Vol.16 (3), p.326-334
• Main Authors: Brägger, Urs, Karoussis, Ioannis, Persson, Rutger, Pjetursson, Bjarni, Salvi, Giovanni, Lang, NiklausP
• Format: Article
• Language: English
• Subjects: Adult; Aged; Aged, 80 and over; Analysis of Variance; Cohort Studies; complications; Dental Implants, Single-Tooth - adverse effects; Dental Prosthesis, Implant-Supported - adverse effects; Dental Restoration Failure; Dentistry; Denture, Partial, Fixed - adverse effects; failures; Female; fixed partial dentures; Humans; Male; Middle Aged; Odds Ratio; oral implants; prospective; Prospective Studies; prosthodontics; single crowns
• ISSN: 0905-7161; 1600-0501
• DOI: 10.1111/j.1600-0501.2005.01105.x

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® 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