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Radiopacity of nonmetallic root canal posts
Haytham Ibrahim1, Omar El-Mowafy, James W Brown
1Faculty of Dentistry, University of Toronto, Ontario, Canada.
The International Journal of Prosthodontics
|February 17, 2006
Summary
This study evaluated the radiopacity of nonmetallic posts used in dentistry. Three of the seven posts evaluated had radiopacity values lower than dentin, indicating insufficient radiopacity for clinical use.
Area of Science:
- Dental Materials Science
- Biomaterials Research
- Radiology
Background:
- Nonmetallic posts are increasingly used in dental restorations.
- Adequate radiopacity is crucial for posts to be visualized on radiographs.
- Assessing radiopacity ensures proper clinical assessment and diagnosis.
Purpose of the Study:
- To determine and compare the radiopacity of various nonmetallic posts.
- To evaluate if their radiopacity meets clinical diagnostic standards.
Main Methods:
- Seven types of nonmetallic posts were tested.
- Radiographic images were captured and analyzed using optical density measurements.
- Radiopacity was quantified and compared to aluminum thickness equivalents.
Main Results:
- Significant differences in radiopacity were found among the tested posts (P < .001).
- One zirconium post exhibited radiopacity exceeding enamel.
- Another post (glass fiber, acrylic resin, fillers) was more radiopaque than dentin but less than enamel.
- Three posts demonstrated radiopacity below that of dentin.
Conclusions:
- Three of the nonmetallic posts evaluated possess insufficient radiopacity for clinical use.
- Material selection is critical to ensure adequate radiographic visualization of dental posts.