I’ve seen a debate between my friends upon which way むしば is usually written, can someone clarify? some claim its 齲 while I’ve seen 虫歯 on NHK which confuses me, if anyone can clear it up, that’d be awesome!
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虫歯 is a common well-known kanji compound.
I had never heard of 齲歯 until seeing this thread.
I’m curious what would give someone the impression that 齲歯 is the more common one.
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yeah, I think I found the solution they were simply trolling the poor guy! 
I just had to make sure I wasn’t tripping or anything
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It’s in my jpdb vocab, which suggests I saw it somewhere. Probably in 骨と墓の考古学 大都市江戸の生活と病 | L39 but possibly in something else that was fond of old/odd kanji choices.
虫歯 is definitely the most common, though; the corpus ngram tool in wwwjdic says
虫歯 1248550 86.0%
むし歯 186943 12.9%
齲歯 1894 0.1%
むしば 14801 1.0%
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