| 摘要 |
A laboratory analog has a pin of a dental prosthesis system screwed into it so that it can be worked. The analog has at least two parts threaded one inside the other, including an upper part, having an upper end reproducing a connecting upper part of an implant implanted in the jawbone of a patient, and a lower part. One of the two parts has a thread for screwing in the pin and the other part includes rotation-preventing means adapted to cooperate through complementary shapes with a pin screw or a threaded part of the pin screwed into the thread to prevent it rotating.
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