Retrospective Database Study: Influence of Post-endodontic Restoration Placement on Survival of Root Canal-treated Teeth

NCT06441058 | Completed

• 2 other identifiers: Timing-post-endodontic20/2/20
• Study Type: observational
• Target: 541
• Locations: 1 country
• Sites: 1

Brief Summary

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.

Conditions

Root Canal Treatment

Outcome Measures

Primary Outcomes (1)

• Success of endodontic treatment

  Success is defined as the time-interval without a subsequent endodontic re-intervention or extraction of the tooth.

  1998-2023

Secondary Outcomes (1)

• Survival of the tooth

  1998-2023

Study Arms (1)

Indirect post-endodontic restorations

Indirect post-endodontic restorations (e.g. crown, partial crown).

Other: No patient treatment is associated with the study

Interventions

No patient treatment is associated with the study OTHER

No patient treatment is associated with the study.

Indirect post-endodontic restorations

Eligibility Criteria

• Sex: all
• Healthy Volunteers: No
• Age Groups: Child (0-17), Adult (18-64), Older Adult (65+)
• Sampling Method: Non-Probability Sample

Study Population

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.

You may qualify if:

• 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.

You may not qualify if:

• None.

Sponsors & Collaborators

• University of Göttingen: lead

Study Sites (1)

University Medical Center Göttingen, Dept. of Preventive Dentistry, Periodontology and Cariology

Göttingen, Lower Saxony, 37075, Germany

Location

Study Design

• Study Type: observational
• Observational Model: COHORT
• Time Perspective: RETROSPECTIVE
• Sponsor Type: OTHER
• Responsible Party: PRINCIPAL INVESTIGATOR
• PI Title: Senior Lecturer

Study Record Dates

• First Submitted: May 28, 2024
• First Posted: June 4, 2024
• Study Start: June 1, 2024
• Primary Completion: June 1, 2025
• Study Completion: June 1, 2025
• Last Updated: January 27, 2026

Record last verified: 2026-01

Data Sharing

• IPD Sharing: Will not share

Locations

DE (1)