| 摘要 |
The present invention relates to a cannula for wedging and spreading, in particular for wedging of the teeth, in the form of a tubular assembly. This wedging cannula is characterised by the fact that it comprises a rear part (1) penetrating into the zone to be spread apart and to be wedged, and a front part (2) which has a wider cross section than the rear part and which permits wedging by virtue of the shoulder (3) thus formed between front part (2) and rear part (1), the tube (4) being bored longitudinally through both parts (1) and (2). <IMAGE>
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