Dental Clinic closed Sept. 14 Published Aug. 29, 2012 28th Bomb Wing Public Affairs ELLSWORTH AIR FORCE BASE, S.D. -- The 28th Medical Operations Squadron Dental Clinic will be closed for training and an official function, Sept. 14. Airmen and family members with a dental emergency may call the clinic at (605) 385-3657 to contact the on-call dentist and dental technician.