Which crown is better a porcelain-ceramic substrate or porcelain fused to predominantly base metal?

The choice between a porcelain-ceramic substrate and porcelain fused to predominantly base metal depends on several factors, including aesthetics, strength, and biocompatibility. Porcelain-ceramic substrates typically offer better aesthetics and translucency, making them suitable for front teeth. In contrast, porcelain fused to base metal is generally stronger and more durable, making it a good option for posterior teeth where strength is paramount. Ultimately, the best choice depends on the specific clinical situation and patient needs.