What material typically restores the proximal surfaces of anterior metal-ceramic crowns?

The restoration of the proximal surfaces of anterior metal-ceramic crowns is primarily achieved using porcelain. This is due to porcelain's excellent aesthetics, which allows for a natural appearance that closely mimics the appearance of natural teeth. The translucency and color matching properties of porcelain make it a preferred choice for cosmetic restorations, particularly in the visible areas of the mouth.

Additionally, porcelain can be layered to achieve the desired shade and translucency, providing better integration with the surrounding natural dentition. It also has good wear resistance and can be effectively bonded to the underlying metal framework of the crown, ensuring structural integrity and longevity of the restoration. This combination of aesthetic quality and functional compatibility with metal frameworks solidifies porcelain as the material of choice for restoring anterior metal-ceramic crowns.