Related Experiment Videos
Invisible supragingival crown margins: an in vitro study
The International Journal of Prosthodontics
|July 1, 1989
Summary
This study presents a novel method for enhancing porcelain crown margins using composite resin. The technique improves esthetics and marginal seal for ceramic restorations.
Area of Science:
- Dental Materials Science
- Restorative Dentistry
- Esthetic Dentistry
Background:
- Porcelain crown margins can present esthetic challenges and potential for microleakage.
- Achieving a seamless transition between ceramic restorations and natural tooth structure is crucial for long-term success.
Purpose of the Study:
- To describe and evaluate a new method for improving the esthetics and marginal seal of porcelain crown margins.
- To assess the predictability of achieving optimal esthetic appearance and marginal integrity with supragingival ceramic restorations.
Main Methods:
- A circumferential shoulder-type preparation entirely in enamel was utilized.
- Cervical enamel and opposing porcelain butt joint were beveled to accommodate composite resin.
- Microleakage analysis and Scanning Electron Microscopy (SEM) evaluation were performed.
Main Results:
- The described marginal design predictably produced an optimal esthetic appearance.
- Excellent marginal seal, contour, and integrity were achieved with supragingival ceramic restorations.
- SEM evaluation confirmed the effectiveness of the composite resin blend.
Conclusions:
- The novel marginal design effectively improves the esthetics and seal of porcelain crown margins.
- This technique offers a predictable method for enhancing supragingival ceramic restorations.
- The procedure ensures optimal marginal integrity and esthetic outcomes.