| 摘要 |
The abutment (1) has an apical base portion (2) with profiled sections bordered on a rotational symmetrical transition portion (4) i.e. truncated cone. The portion (4) extending to a non-circular symmetric section (5) with a wave-shaped upper rim (6), has a crest and soles in respective approximal region, and lingual and a labial section. A non-circular symmetric occlusal portion (7) is bordered coronally on the section (5), and a shoulder of irregular width is placed between the upper rim and a lower rim (8) of the portion (7), to configure the portion (7) with a cross sectional geometry. |
