| 摘要 |
A dental instrument for the extraction of an object from a root canal, comprising a shaft ( 1 ) having an open-end part ( 3 ) designed to receive at least a part of object ( 9 ), this open-end part ( 3 ) able to be deformed to permit seizing object ( 9 ) by clamping and then extracting it from the root canal, is characterized in that open-end part ( 3 ) is tubular and is able to plastically deform, in a manner that involves a reduction of its inner section, under the effect of a given stress.
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