Rock Mountain Capital, a private equity firm, completed the investment in Spark Orthodontics, a specialty orthodontics platform. Financial terms were not disclosed. "We have been extremely impressed by Dr. Hartman and the business he has built, and are excited to partner with him to support his growth strategy for Spark Orthodontics. RMC brings extensive experience in working with entrepreneurs, particularly with multi-site healthcare/consumer services roll-up platforms, which we will leverage as we execute on our shared vision," David Stonehill, Rock Mountain Capital Founder and Managing Partner.