DOVER AIR FORCE BASE, Del. – Tech. Sgt. Raymond Worl, 436th Dental Squadron NCO in-charge of the dental laboratory, uses a rag wheel to smooth and polish a complete denture. All dental appliances are smoothed to prevent rough areas or pits that could trap food particles for denture-wearing patients. (U.S. Air Force photo/ Airman 1st Class Shen-Chia Chu)
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