Smile Doctors Acquires Grinz Orthodontics

Thomas H. Lee Partners and Linden Capital Partners Invest in Smile Doctors

January 5, 2022

Healthcare Services

Smile Doctors, the largest U.S. orthodontics-focused dental support organization with more than 295 locations, announced a strategic investment from Thomas H. Lee Partners. THL is investing alongside existing sponsor Linden Capital Partners in an equal partnership while affiliated orthodontists retain a significant ownership stake to support continued growth and expanded service offerings.

Smile Doctors Acquires myOrthos

March 20, 2025

Healthcare Services

Smile Doctors has acquired myOrthos, an orthodontic support organization with over 70 affiliated locations across 13 states, expanding Smile Doctors' network to more than 550 affiliated locations in 36 states and entering four new states. The acquisition is an add-on to Smile Doctors’ platform to increase provider density in key markets while ensuring continuity of care for myOrthos’ affiliated practices and patients.

Smile Brands Acquires Gateway Dental

March 21, 2019

Dental

Smile Brands Inc., a Gryphon Investors–backed dental support organization based in Irvine, California, has partnered with Gateway Dental in Seattle to provide full-service administrative support while the practice continues to operate under its existing brand. Gateway Dental, founded in 1992 and led by Dr. G. Glenn Buchanan and Dr. John Kim, will keep its existing staff of 14 and retain clinical operations while Smile Brands supplies purchasing, payroll, IT, billing, facilities and marketing support.

Smile Brands Acquires Midwest Dental

December 2, 2020

Healthcare Services

Smile Brands Inc., a portfolio company of Gryphon Investors, completed the acquisition of Midwest Dental, a Dental Support Organization with over 230 offices headquartered in Mondovi, Wisconsin. The combination creates one of the largest DSOs in the U.S., representing approximately 650 offices and over 8,000 employees across 30 states; terms were not disclosed.

Heartland Dental (KKR) Acquires Smile Design Dentistry from Tenex Capital Management

September 5, 2025

Dental

Heartland Dental, a portfolio company of KKR, has acquired Smile Design Dentistry from Tenex Capital Management. Smile Design operates 60 dental practices across Florida with a clinical and support team of more than 300 employees; the deal (an add-on to Heartland's DSO platform) closed on September 5, 2025 and expands Heartland's presence and clinical support capabilities in Florida.

ProSmile (TriSpan-backed) Acquires Four Dental Practices in Maryland, Virginia and Washington D.C.

November 23, 2022

Dental

ProSmile, a TriSpan-backed dental support organization, completed the acquisition of four dental practices located in Maryland, Virginia and Washington D.C., marking the platform's entrance into Washington D.C. and Virginia. The add-on expands ProSmile's Mid-Atlantic footprint and follows several prior add-on acquisitions since TriSpan's initial investment in May 2019.