I've found this kanji during Shodo practice. My teacher (Japanese) didn't know the meaning (she recognized the Tooth bushu/radical but not the "word").
I tried to look it up on the electronic dictionaries I own, both Japanese and Chinese, but while the kanji exists and even has a phonetic associated to it:

there is no actual meaning.
Finally I got something from a Chinese online dictionary. Allegedly (I used Google translate on the whole page) it is an old ideogram for "Milk Teeth".
Now the question(s):
- Does this mean anything in Japanese?
- What would be the current Japanese way to indicate "Milk teeth"?
齓, only for齔. I only found out the two were related after looking it up in Kanjigen. – cypher Sep 09 '12 at 00:00