| 摘要 |
<p>A dental model die ejector tool (10) is designed to loosen the individual model dies (25) mounted on a model base (20) with a tapered dowel pin (31) extending through the base, but at the same time not to lift them for any substantial distance. In turn, that loosening step allows for further easy separation of all the model dies with a wax cast as a single unit from the model base for further individual removal of the model dies. At one end, the model die ejector (10) contains a pushing rod (14) equipped with an ejector shank (16) having a length of less than 1 mm and preferably about 0.1 mm for pushing the dowel pin (31) upwardly in the corresponding sleeve for a short distance equal to the length of the shank so that the wax cast is not disturbed but the dowel pin is loosened. On the other end, the die ejector contains another pushing rod (18) with an ejector cavity (19) for loosening another commonly used type of a dowel pin (51) extending from its sleeve after the removal of a protective cap. The depth of the cavity is sufficient to loosen the dowel pin while using the die ejector but not to lift it thus preventing any potential distortion of the wax cast.</p> |
