Do porcelain crowns adhere to dentin?

There are numerous isses in your uestion.  First the best bond in dentistry is to enamel.  Having said that we have excellent bonding techniques for dentin.  There is increased risk of sensitivity that can be almost eliminated by utilizing Gluma.The second question is why you only have dentin on the linguals.  This can be caused by acid from many causes including reflux, bulimia, lemon or lime sucking, coke swishing, etc or it can be caused by severe grinding or excessive wear.  These can be problems because the cause of the wear can effect longevity of the crowns.In addition when the teeth are prepared you will be closer to the pulp due to needing space for the porcelain.I suggest you have a neuromuscular dentist evaluate your bite if it is a wear problem.

New advances in porcelain crowns can allow for thin but strong material on the lingual (zirconia) and esthetic ceramic on the facial (labial). Lithium dislocate crowns may also work well here. Newer cements also have an inherent bond to tooth structure. Make sure you see a dentist who is familiar with these characteristics of the new types of crowns.