1. James Kunkemoeller, president and CEO of Great Lakes Dental Technologies, will retire Oct. 31.
2. Bilal Bazzi was appointed the first COO of dental startup company Tend.
3. Planet DDS selected Tim Tyrell-Smith to be its first chief marketing officer.
4. Darren Cassidy was named CEO of online dental supply company Net32.
5. New Hyde Park, N.Y.-based DSO Dental365 appointed Chase Drossos vice president of finance.
