Related Experiment Video
Updated: Mar 2, 2026
07:42
Quasistatic Mechanical Testing for Computer-Aided Design and Manufacturing Occlusal Veneers Cemented to Milled Dentin Analog Material
Published on: December 20, 2024
915
Biomechanical behavior of teeth without remaining coronal structure restored with different post designs and
Angélica Maroli1, Kaue Andreas Lotice Hoelcher1, Vagner Flavio Reginato2
1School of Dentistry, Meridional Faculty - IMED, Passo Fundo, RS, Brazil.
Summary
Restoring teeth without crowns using various posts shows that all post types improve survival under stress. However, cast post and core (CPC) and conical glass-fiber posts (C-FP) offer higher fracture strength but risk irreparable fractures.
Area of Science:
- Dental materials science
- Biomaterials engineering
- Restorative dentistry
Background:
- Teeth lacking coronal structure require post and core restorations for support.
- Evaluating the biomechanical performance of different post materials is crucial for clinical success.
- Understanding stress distribution is key to preventing catastrophic tooth failure.
Purpose of the Study:
- To assess the biomechanical behavior of endodontically treated teeth restored with different post systems.
- To compare the survival rate, fracture strength, and failure patterns of various post materials and configurations.
- To analyze stress distribution within the restored tooth structure using finite element analysis.
Main Methods:
- Fifty bovine teeth were restored with cast post and core (CPC), prefabricated metallic post (PFM), parallel glass-fiber post (P-FP), conical glass-fiber post (C-FP), or composite core (CC).
- Teeth underwent thermomechanical challenging (TC) to evaluate survival rate.
- Fracture strength (FS) and failure pattern (FP) were assessed.
- Finite element models were created to analyze stress distribution under a 100N load.
Main Results:
- All post-restored teeth survived TC, whereas the no-post composite core (CC) group experienced 30% failures.
- Cast post and core (CPC) and conical glass-fiber post (C-FP) exhibited the highest fracture strength.
- Prefabricated metallic post (PFM) and CPC groups showed a higher incidence of irreparable fractures (70% and 60%, respectively).
- Finite element analysis indicated maximum stress concentration in the canal for metallic posts and at the crown contact point for glass-fiber posts and CC.
- CPC restorations resulted in higher cervical dentin stress (modified von Mises), but within safe limits.
Conclusions:
- Post restorations significantly enhance tooth survival compared to no post.
- While CPC and C-FP offer superior fracture strength, careful consideration of potential irreparable fractures is necessary.
- Glass-fiber posts and composite cores may distribute stress more favorably at the coronal level.
- CPC restorations demonstrate good stress distribution at the dentin interface, though with increased cervical stress.
Related Concept Videos
01:21Tooth Anatomy
2.4K
The human tooth enables us to eat a variety of foods, speak clearly, and even aid in shaping our faces. Teeth are composed of various elements that work together. Here's a detailed look at the anatomy of a human tooth.
The Crown, Neck, and Root
The visible part of the tooth is referred to as the crown. It's covered by enamel, the hardest substance in the human body. The crown is uniquely shaped for each type of tooth, allowing for different functions such as cutting, tearing, or...
The Crown, Neck, and Root
The visible part of the tooth is referred to as the crown. It's covered by enamel, the hardest substance in the human body. The crown is uniquely shaped for each type of tooth, allowing for different functions such as cutting, tearing, or...
2.4K
01:15Teeth
1.9K
The formation of teeth, also known as odontogenesis, is a complex process that begins in utero, around the sixth week of embryonic development. There are three stages to this process: the bud stage, the cap stage, and the bell stage.
In the bud stage, the tooth germ (an aggregation of cells) starts to form in the developing jawbone. During the cap stage, the tooth germ differentiates into enamel organ, dental papilla, and dental sac, which will later develop into the tooth's enamel, dentin...
In the bud stage, the tooth germ (an aggregation of cells) starts to form in the developing jawbone. During the cap stage, the tooth germ differentiates into enamel organ, dental papilla, and dental sac, which will later develop into the tooth's enamel, dentin...
1.9K