Placement ofstainless steel crownswith window facings is the most time-consuming of the anterior esthetically desirable procedures. A two-step procedure is required to place a stainless steel crown with a window facing. The preparation is almost identical to that for a strip crown except that no ...
Covering the crown with porcelain can solve the color issue. These crowns behave similarly to PFM crowns. However, it can cause allergies as the frame is still made from gold. Furthermore, it requires more tooth prepping than a regular gold crown. Besides, there are crowns made entirely of ...
Hence, the establishment of efficient and con- venient synthetic procedure for the main chain-type polyrotaxane (B) is of great significance. In our previ- ous work,17 we have preliminarily disclosed the prep- aration of a main chain-type polyrotaxane (B) com- posed of poly(crown ether)...