Try these. You'll have to import the model into Poser and then use the grouping tool to spawn props and then select the individual tooth you want and save it as an individual prop. Someone else can probably explain that process better than I can :-) You'll also have to create a texture - maybe just an slightly off white color would do for what you need. 

I'm not sure what the difference is with the different .obj files is. I used the teeth_max.obj and that worked fine.

Hope the tooth fairy is generous!

Teeth: http://www.sharecg.com/v/57443/view/5/3D-Model/Teeth 

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