A DSO that added a hygiene director and three other dental leadership moves that have taken place since April 2:
1. Waltham, Mass.-based 42 North Dental appointed Delfi Nieto as chief people officer.
2. Houston-based Smile Source appointed Tom Rimmer as vice president of strategic partnerships.
3. Miami-based Guardian Dentistry Partners promoted Jeremy Smith to director of hygiene.
4. Don Casey, the former CEO of Dentsply Sirona, joined Avista Capital Partners as a strategic executive.