That is called Sinodont teeth. The oldest example found is 23,000 years old and was from around Lake Baikal. (the world's deepest lake.) BTW, Kennewick Man has Sundadont teeth.
Anyways, I still got them in a box and just looked at them. I got one root on the top ones and two roots on the bottom ones.
Oh, by the way...the 2 big molars on top, I forget what they are called, are different on Caucasian males than everyone else in the world. Only caucasian males have an extra little bump on the front inside corner of the two big molars. I have these extra little bumps.
So I have hybrid caucasian-chinese teeth.