| 摘要 |
The primary crown (8) comprises full ceramic and the secondary crown (16) is of a dental alloy, pure titanium or directly applied fine gold. The primary crown and the secondary crown have conical or cylindrical surface (10,22) corresponding with one another. The primary crown may have a stage (14), which is arranged in the area of the gingiva (12). The surface (10) of the primary crown may be polished, particularly a highly smooth polish. The primary crown and/or its connection with an abutment (2) and/or the secondary crown can be industrially prefabricated. |
