| 摘要 |
In a tooth implant comprising a primary crown for mounting on a base carrier implanted into a patient's jaw and a secondary crown mounted onto the primary crown for supporting a bridge or prosthesis, the primary crown has a circular or ball-shaped projection and the secondary crown has a recess of a complementary configuration receiving the projection of the primary crown so that the secondary crown is pivotally supported by the primary crown for permitting adjustments during installation of the prosthesis or bridge onto the secondary crown. |
