| 摘要 |
The invention relates to a tensioning system for an orthodontic outer brace (21), comprising resilient means, and coupling means (9) for transmitting a tensile force exerted by the resilient means to the outer brace. The resilient means comprise a resilient element (5). The tensioning system comprises an arc-shaped guide path (4), along which the resilient element (5) is freely movable. Coupling means can be fixed on one side to the outer brace and are connected to one another on the other side via the resilient element, such a way that the resilient element moves along the guide path when the patient turns his or her head. The guide path can comprise a tube or an arc-shaped strip of metal or can be formed in some other way. Preferably, the guide path is so flexible that the arc shape thereof can be adjusted to the curvature of the patient's neck. The resilient element preferably has a spring constant which decreases or is zero on further extension after a specific spring force or extension is reached. The resilient element is preferably a helical spring.
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