Money Is SmileDirectClub safe? Teeth-straightening service slams NBC report on ‘painful problems’ February 14, 2020Nathan Bomey, USA TODAYComments Off on Is SmileDirectClub safe? Teeth-straightening service slams NBC report on ‘painful problems’ Is SmileDirectClub's teeth-straightening service medically sound? NBC News called that into question with a report that SDC slammed as misleading.