DR. J.P. CASTEYDE / CNRI / SCIENCE PHOTO LIBRARY DR. J.P. CASTEYDE / CNRI / SCIENCE PHOTO LIBRARY
Dental cavities. Close-up of cavities in the upper (maxillary) molars. Cavities, or caries, are caused by acid produced by bacteria as they ferment food debris accumulated on the tooth surface, resulting in demineralisation and destruction of the hard tooth tissues.
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