| 摘要 |
An endodontic post has an elongated cylindrical outer surface. One and only one groove having a pitch angle in a range of from about 35 DEG to about 55 DEG is disposed in the cylindrical outer surface. The groove performs three functions. It vents air and/or cement as the post is placed in a prepared post space. It aids in retaining the post in place within the post space after the cement is set. It also acts as a thread so that the post can be unthreaded and removed from the post space if necessary. The dimensions of the groove are such that an ungrooved area of the outer cylindrical surface is substantially greater than a grooved area thereof.
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