I suppose it depends on what type of bankai they use, though i don't recall any that would be particularly useful for a dentist, excluding tooth extraction.
Lol, well we don't want Byakuya being ur dentist, now would we?With him saying 'Bankai, Senbonzakura Kageyoshi' in your damn mouth won't help matters. Look no germs...and wow, no brain left either O_O
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