M.E.
My son has had a cavity treated with a laser and the dentist did not need to give him a shot to numb the area which was a big plus. My daughter needed a frenectomy to remove the excess tissue between her front teeth so the gap would close. Normally, this would mean sedation, stiches and two weeks of recovery. The dentist used a soft tissue laser and a shot to numb the area. My daughter needed no pain medication afterward and was at school and playing soccer the next day.
The only downside is I couldn't threaten my kids with a trip to the dentist if they tried to slack off on brushing. They LOVE going to the dentist!