Dntl Bar's new president and three other dental appointments to know:
1. Roshan Parikh, DDS, was appointed president at New York City-based DSO Dntl Bar.
2. Cindy Roark, DMD, Sage Dental's senior vice president and chief clinical officer, joined Boston-based Harvard School of Dental Medicine's board of fellows.
3. Derek Johnson was selected as the new vice president of Engage Dental, a dental technology company.
4. Purnima Kumar, PhD, was appointed chair of the Department of Periodontics and Oral Medicine at the University of Michigan School of Dentistry in Ann Arbor.