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Related Experiment Video

Updated: Feb 25, 2026

Quasistatic Mechanical Testing for Computer-Aided Design and Manufacturing Occlusal Veneers Cemented to Milled Dentin Analog Material

Quasistatic Mechanical Testing for Computer-Aided Design and Manufacturing Occlusal Veneers Cemented to Milled Dentin Analog Material

Published on: December 20, 2024

Post-Retained Single Crowns versus Fixed Dental Prostheses: A 7-Year Prospective Clinical Study.

M Ferrari^1,2, R Sorrentino^1,3, J Juloski^1,4

¹1 Department of Medical Biotechnologies, Division of Fixed Prosthodontics, University of Siena, Siena, Italy.

Journal of Dental Research

|August 4, 2017

Summary

The 7-year survival rate for endodontically treated teeth (ETT) restored with fiber posts is 69.2%. More coronal structure and single crowns improve ETT survival, while less structure and fixed dental prostheses reduce it.

Keywords:

clinical trial dental bonding dental prosthesis dental restoration failure endodontics prosthetic dentistry/prosthodontics

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Area of Science:

Dentistry
Biomaterials Science
Prosthodontics

Background:

Endodontically treated teeth (ETT) often have compromised biomechanical integrity.
Restoration planning requires careful consideration of hard tissue loss and prosthetic type.

Purpose of the Study:

To evaluate the 7-year clinical performance of ETT restored with fiber posts.
To assess the impact of prosthetic restoration type and residual coronal structure on ETT survival.

Main Methods:

Prospective clinical trial involving 120 ETT.
Groups: single unit crowns (SCs) vs. 3-4 unit fixed dental prostheses (FDPs).
Subgroups based on residual coronal structure: >50% (A) vs. <=50% (B).

Main Results:

Overall 7-year survival rate was 69.2%.
Highest survival (90%) in group 1A (SCs, >50% structure).
Lowest survival (56.7%) in group 2B (FDPs, <=50% structure).
Residual coronal structure and its interaction with restoration type significantly impacted survival.

Conclusions:

The amount of residual coronal structure is a critical factor for ETT survival.
The type of prosthetic restoration interacts with residual structure to influence long-term outcomes.
Optimizing restoration strategies based on remaining tooth structure is essential for ETT longevity.