Private equity firms Thomas H. Lee Partners and Linden Capital Partners, completed the investment in $1.2bn in Smile Doctors, an orthodontics clinic chain operator. “Along with our existing partners at Linden, we are excited about the opportunity to create new partnerships with thriving practices and continue to expand our services through this new relationship. This partnership allows our team members to remain committed to providing excellent care in our communities with all-inclusive orthodontic treatment that results in beautiful, confident smiles and genuine, unforgettable experiences," J. Hedrick, Smile Doctors CEO.