For denta; equipments, you can go to Olympus Corporation which is at Wujin Century Building, Fumin Lu, Xuhui District for a look.

Thanks David, I went to the place that you suggested. This company runs a dental supply website : come&buy.com. The sales personnel were very knowledgeable and obliging. I placed an order for some items which I collected the following day. I did not manage to find other dental equipments or products suppliers in Shanghai..