YOU SAID:
He has grown a little long in the teeth
INTO JAPANESE
彼は歯が少し長くなった
BACK INTO ENGLISH
he got a little longer teeth
INTO JAPANESE
彼は少し長い歯を持っていた
BACK INTO ENGLISH
he had long teeth
INTO JAPANESE
彼は長い歯を持っていた
BACK INTO ENGLISH
he had long teeth
You should move to Japan!