That Morimoto Katsu hadn’t been a dentist in a while was made abundantly clear as soon as he opened his mouth.
Warning: This is one of the grossest videos ever recorded by mankind.
YouTuber campbpar posted all the information you’ll need about this situation below his video:
Katsu shows up last visit with a decade of calcite and plaque built up due to authentic Japanese cuisine, smoking, and having never flossed. Plaque that is not removed can harden into tartar, a hard mineral deposit that forms on teeth and can only be removed through professional cleaning by a dental professional. When this happens, brushing and cleaning between teeth become more difficult, and gum tissue can become swollen or may bleed. This condition is called gingivitis, the early stage of gum disease.
Flossing helps remove debris and interproximal dental plaque, the plaque that collects between two teeth. Dental floss (or dental tape) helps clean these hard-to-reach tooth surfaces and reduces the likelihood of gum disease and tooth decay.
Just brush your teeth, everyone.
(H/T SF Globe)