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One-piece endodontic crown fixed partial denture: Is it possible?
João Paulo M Tribst1, Amanda Maria de O Dal Piva2, Joris Muris2
1Assistant Professor, Department of Oral Regenerative Medicine, Academic Centre for Dentistry Amsterdam (ACTA), Universiteit van Amsterdam and Vrije Universiteit, Amsterdam, the Netherlands.
The Journal of Prosthetic Dentistry
|February 21, 2023
Summary
1-piece endodontic crowns offer a viable alternative for fixed partial dentures (FPDs) on endodontically treated teeth. This approach can decrease fracture risk and offers comparable mechanical behavior to conventional crowns.
Area of Science:
- Dental Materials Science
- Biomaterials Engineering
- Prosthodontics
Background:
- The optimal method for restoring missing teeth with fixed partial dentures (FPDs) using endodontically treated abutments remains under investigation.
- Exploring the efficacy of 1-piece endodontic crowns compared to conventional complete crowns is crucial for improving FPD longevity.
Purpose of the Study:
- To compare the mechanical performance of FPDs fabricated with 1-piece endodontic crowns versus conventional complete crowns.
- To analyze stress distribution within the prosthesis, cement layer, and abutment teeth under simulated occlusal loading.
Main Methods:
- A 3-dimensional finite element analysis (FEA) model was developed using CAD software for a posterior FPD scenario.
- Four FPD designs utilizing lithium disilicate were simulated: conventional complete crown, two 1-piece endodontic crowns, and a hybrid approach.
- Mechanical behavior was evaluated under axial load, analyzing von Mises and maximum principal stresses.
Main Results:
- All FPD designs exhibited similar overall mechanical behavior, with the pontic experiencing the highest stress.
- 1-piece endodontic crowns demonstrated a reduced risk of fracture failure.
- Conventional preparations resulted in lower stress concentration in abutment teeth compared to some 1-piece endodontic crown configurations.
Conclusions:
- 1-piece endodontic crown preparations represent a feasible alternative for retaining 3-unit lithium disilicate FPDs.
- This approach offers potential benefits in reducing fracture risk for endodontically treated abutments.
