Osteosynthesis instrument

Details Osteosynthesis instrument Osteosynthesis instrument

A - Human Necessities

61

B

A61B 17/84 (2006.01) A61B 17/70 (2006.01) A61B 17/86 (2006.01) A61B 19/00 (2006.01) A61F 2/00 (2006.01) A61F 2/30 (2006.01)

Patent

CA 2175069

Locking plug (1) consisting of two coaxial parts (2, 3) separated by a break start line, mutually coaxial recesses (2, 3) being formed within each part. The first part (1) enables the second part (3) having a thread (5) to be screwed into an implant where it remains fixed after the two parts are separated at line (4), after a predetermined rupture torque is exceeded. Advantageously, the recess (7) in the second part (3) provides for subsequent release, if required, so that the instrument can be removed. A clamping action is obtainable with great precision, in accordance with the requirements of the manufacturer, since the rupture torque can be adjusted to a specified value by precise machining of the break start line (4).

Le bouchon (I) est constitué de deux parties coaxiales (2, 3) séparées d'une ligne d'amorce de rupture, en chaque partie est ménagée une empreinte respective (6, 7) coaxiale à l'autre empreinte, la première partie (1) permettant le vissage de la seconde partie (3), pourvue d'un (5), dans un implant auquel elle doit rester fixée après rupture des deux parties à la ligne (4), lorsqu'un couple de rupture prédéterminé est dépassé. L'empreinte (7) de la seconde partie (3) permet d'assurer un desserrage ultérieur si nécessaire, pour démonter l'instrumentation ce qui constitue un avantage essentiel de ce bouchon. De plus, le serrage peut être obtenu avec une grande précision, conformément aux souhaits du fabricant, car le couple de rupture peut être ajusté à la valeur prévue en usinant de manière précise la ligne (4) d'amorce de rupture.

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