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Stress distribution in fiber-reinforced composite inlay fixed partial dentures
Giorgio Rappelli1, Lorenzo Scalise, Maurizio Procaccini
1School of Dentistry, University of Ancona, Ancona, Italy. g.rappelli@univpm.it
The Journal of Prosthetic Dentistry
|May 4, 2005
Summary
This study analyzed stress in fiber-reinforced composite inlay fixed partial dentures (FRCIFPDs). Stress concentrates in FRCIFPD connector areas and at the cervical margin of prepared teeth.
Area of Science:
- Biomaterials Science
- Dental Materials
- Mechanical Engineering
Background:
- Fiber-reinforced composite inlay fixed partial dentures (FRCIFPDs) offer a potential prosthetic solution.
- Fabrication procedures are established, but mechanical behavior remains under-investigated.
Purpose of the Study:
- To investigate 3-dimensional (3-D) stress and strain distribution in a 3-unit FRCIFPD using the finite element (FE) method.
- To analyze stress concentrations under vertical and lateral loading conditions.
Main Methods:
- A detailed 3-D FE model of a 3-unit FRCIFPD was created with 227,768 tetrahedral elements.
- Loads of 196 N were applied vertically and laterally to validate the model with mechanical compressive tests.
Main Results:
- Peak stress values were observed in the connector areas of the FRCIFPD.
- Under vertical load, prepared teeth experienced concentrated stress at the cervical margin of the abutment preparation.
Conclusions:
- Stress within FRCIFPDs concentrates at connector areas.
- Peak stress in prepared teeth occurs at the cervical margin of the preparation box.