Mileidy Gonzalez-Negreira
| Mileidy Gonzalez-Negreira |
Mileidy Gonzalez-Negreira
Julian Conejo
Preventive & Restorative Sciences, University of Pennsylvania School of Dental Medicine
Introduction
Traditionally, cast high-noble dental crowns have been manufactured through investing and casting. However, the advancements in digital systems in dentistry have allowed us to challenge these conventional methods for the acquisition, design, and fabrication of dental restorations. The aim of this study is to present a clinical report of the fabrication of a cast gold crown performed with a fully digital approach.
Methods
A failed existing porcelain fused to metal (PFM) crown needed to be replaced in a 57-year-old woman. Given the patient’s heavy bruxism, occlusal wear of other existing porcelain restorations, and opposing existing gold crowns, gold was the material of choice for the new crown to be fabricated. After the removal of the failed PFM crown and existing mesial decay, the tooth was re-prepared maintaining the existing amalgam core, reducing the margins gingivally, and choosing a chamfer marginal design. A CAD/CAM system was used for the design and fabrication of the crown. Digital scans were obtained using CEREC Omnicam Dentsply Sirona, which the laboratory used to design the final restoration and print the 3D models. The Argen company used these to mill the final restoration in high noble yellow full cast alloy with 58%Au.
Results
The combination of full digital workflow with milled high-noble restoration resulted in an improved fit (marginal and occlusal adjustments) in contrast to the previously used porcelain fused to metal material in a patient with parafunctional habits, specifically bruxism.
Conclusion
The entire restorative and laboratory steps of cast gold fabrication were simplified by the use of digital technologies such as scanners, printers, and milling.