An observational study in Root Canal Treatment, sponsored by University of Göttingen. Completed at 1 site in Germany. Per ClinicalTrials.gov, last updated 2026-01-27.
Sponsored by University of Göttingen · Observational
The aim of this study is to assess the influence (i.e. type and timing) of post-endodontic restorations on the survival of root canal-treated teeth and to determine the influence of patient-, tooth-, treatment-, and restoration-specific parameters on longevity.
Patients who received a root-canal treatment between 1998 and 1999 with subsequent placement of an indirect restoration (e.g. crown, partial crown) will be retrospectively analyzed. Patient-, tooth-, treatment-, and restoration-specific parameters will be obtained from digital and paper-based dental records.
Survival and success of the root-canal treatments will be assessed using Kaplan-Meier statistics. Mean annual failure rates (mAFR) and median survival time will be calculated (Kaplan-Meier statistics). Potential predictive factors will be tested using log-rank tests and multi-variate Cox-regression analysis.
University of Göttingen is the lead sponsor of 37 studies on the registry; 3 are open to participants now.
Counted across the registry records on this site, refreshed daily.
Patients who received a root-canal treatment followed by the placement of an indirect post-endodontic restoration (e.g. partial crowns, crowns) within the Department of Preventive Dentistry, Periodontology and Cariology between 1998 and 1999.
Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.
Exclusion Criteria:
Indirect post-endodontic restorations (e.g. crown, partial crown).
Other: No patient treatment is associated with the study
No patient treatment is associated with the study.
Success of endodontic treatment
Success is defined as the time-interval without a subsequent endodontic re-intervention or extraction of the tooth.
Time frame: 1998-2023
Survival of the tooth
Survival of the tooth is defined as the time-interval without extraction of the tooth.
Time frame: 1998-2023
Plan to share: No
No publications or documents are linked to this record.
Ran from Jun 2024 to primary completion in Jun 2025, 12 months.
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This study is completed, as verified in Jan 2026. You cannot join it, but the record below documents what was studied.
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University of Göttingen