I will suggest you learn about dental clean up and not trust your life with this or any dentist.
All root canals must go, they are DEAD toxic teeth, the dentist puts lead in these.
All bridges must go, they lock up the skull plates and a pile metal that does nothing but harm.
All crowns are a super problem, even if you spend for porcalin at $1,000+ a piece, they are still clued on and the glue is a problem as well.
Dentist are Dentist and I trust not one with my health. You must read and learn and after you find one you can somewhat trust, you tell them what to do and never let them do what they want. Every chemical they use is toxic and most are cancer causing. If you were really rich, you could see the laser type dentist, they can save your teeth with the least amount of damage and cost about $2,000 a root canal rpair or crown repair, etc.