| 摘要 |
An endodontic post has at least two graduated stages of decreasing diameter with generally cylindrical outer surfaces. The graduations allow the post to diminish in size as it passes into a prepared post space which can be complementarily graduated. The staged post may also include a single groove having a pitch angle in a range of from about 35 DEG to about 55 DEG disposed in the cylindrical outer surfaces thereof. A graduated endodontic drill has at least two cutting stages of decreasing diameter for cutting through tooth material to make a prepared post space.
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