My first presa broke two of his canines (he hated crates). It was also prescribed a root canal, post and crowns for him. WE got the root canal done, but that was it, due to the cost, and he wasn't a working dog. he had enough of the canines left to function adequately. As a dental hygienist, I can also concur to go with the metal crowns. Porcelain crowns have made great strides in the last decade, but even in humans if you have an extremely strong bite, you are going to break them. Typically, they do crowns on police K9s when they break their teeth off in perps ;)