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

• Conditions: Root Canal Treatment
• Interventions: Other: No patient treatment is associated with the study

• Registration Number: NCT06441058
• Lead Sponsor: University of Göttingen

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.

Detailed Description

Not available

Study Timeline

• Study First Submitted: 2024-05-28
• Study First Submitted QC: 2024-05-28
• Status Verified: 2024-06
• Study Start: 2024-06-01
• Study First Posted: 2024-06-04
• Last Update Submitted: 2024-06-05
• Last Update Posted: 2024-06-07
• Primary Completion: 2025-06
• Study Completion: 2025-06

Recruitment & Eligibility

• Status: ENROLLING_BY_INVITATION
• Sex: All
• Target Recruitment: 1000

Inclusion Criteria

• 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.

Exclusion Criteria

• None.

Study & Design

• Study Type: OBSERVATIONAL
• Study Design: Not specified

Arm && Interventions

Group	Intervention	Description
Indirect post-endodontic restorations	No patient treatment is associated with the study	Indirect post-endodontic restorations (e.g. crown, partial crown).

Primary Outcome Measures

Name	Time	Method
Success of endodontic treatment	1998-2023	Success is defined as the time-interval without a subsequent endodontic re-intervention or extraction of the tooth.

Secondary Outcome Measures

Name	Time	Method
Survival of the tooth	1998-2023	Survival of the tooth is defined as the time-interval without extraction of the tooth.

Trial Locations

Locations (1)

University Medical Center Göttingen, Dept. of Preventive Dentistry, Periodontology and Cariology; 🇩🇪 Göttingen, Lower Saxony, Germany