| 摘要 |
Endodontal contra-angle ( 1 ) equipped with a head ( 2 ) supporting an endodontal instrument ( 3 ), and with attachment means ( 5 ) for attaching a shank ( 4 ) penetrating the head ( 2 ) of the contra-angle ( 1 ), characterized in that said head ( 2 ) of the contra-angle is equipped with a member that is free to rotate ( 6 ), assembled fixedly to the body of said head ( 2 ).
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