A study of ceramic-metal restoration process

The conventional process of ceramic-metal dental restorations has several drawbacks, produces substandard quality restorations, and may result in frequent failures. The lack of adequate development of nonprecious alloys has limited the bond strength between the coping and opaque to only 14,000 p.s.i. The procelain layer oftentimes contains cracks and gas bubbles, making it weak and hence susceptible to failures even during processing. The restorations, ranging from single-unit to full-arch, undergo severe stresses in a person's mouth, and therefore, a high degree of strength is essential. Attempts are being made to improve the present technique to obtain better restorations. Several modifications have been made to the conventional process, and a much stronger alloy-to-opaque bond and a defect-free ceramic layer have been achieved. Since the work on our technique has not been completed, the detailed description and experimental results will be the subject of a future article.