I want to schedule ultherapy and sculptra but just had a root canal. How long do I need to wait?

If you had dental work I would wait two weeks to make sure that both the swelling and possible nerve side effects are resolved.  Then I would begin with Ulthera or Thermage for Skin Tightening.  I prefer Thermage and have had great results with Thermage CPT total tip which tightens the lower face and lasts up to two years.  A week later you could get your Sculptra injections.  After you are injected with Sculptra you will need to follow the "rule of 5's" where you massage the treated area for five days, five times a day, for five minutes.  For the best results please find a board certified dermatologist with experience in facial injections and cosmetic dermatology.