title: Survival rate of endodontically treated teeth with posts after prosthetic restoration.
abstract: The purpose of this retrospective clinical study was to evaluate the survival rate of teeth that were endodontically treated and restored with endodontic posts and prosthodontic restorations. A total of 864 teeth in 360 patients were included in the study. Dental records and radiographs of the patients were evaluated and four parameters were documented. The parameters were type of post, type of prosthodontic restoration, observation time, and, in cases of failure, failure mode. Statistical survival analyses were performed according to Kaplan-Meier. The mean observation time was 22.5 +/- 14.9 months. The calculated survival rates of the abutments were statistically significant different for fixed partial dentures (FPDs) and for removable partial dentures (RPDs) with survival rates of 92.7% and 51.0% after 60 months, respectively. Most of the presumed factors influencing the survival rate of endodontically treated abutment teeth only affected the outcome in the RPD group. Teeth restored with post and cores present a high risk for failure when used as abutments for conical-double-crown-retained RPDs.
authors.affiliation: Department of Prosthodontics, Propaedeutics and Dental Materials, Christian-Albrechts University, Kiel, Germany. pwegner@praxis-wegner.de
authors.forename: Pia K
authors.initials: PK
authors.lastname: Wegner
authors.forename: Sandra
authors.initials: S
authors.lastname: Freitag
authors.forename: Matthias
authors.initials: M
authors.lastname: Kern
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D003442:Crowns / Q000706:statistics & numerical data; D000044:Dental Abutments / Q000706:statistics & numerical data*; D017266:Dental Prosthesis / Q000706:statistics & numerical data*; D019232:Dental Restoration Failure; D003830:Denture, Partial, Fixed / Q000706:statistics & numerical data; D003832:Denture, Partial, Removable / Q000706:statistics & numerical data; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D008875:Middle Aged; D011176:Post and Core Technique / Q000706:statistics & numerical data*; D012189:Retrospective Studies; D012390:Root Canal Therapy / Q000706:statistics & numerical data*; D016019:Survival Analysis; D013997:Time Factors; D019553:Tooth, Nonvital / Q000628:therapy*