Importance

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Abstract

A paraocclusive instrument including two holding jaws laterally applied to the lower dental arch and a basic element in communication with the holding jaws in the form of a rod to transfer movement of the lower jaw to display and/or recording devices. The holding jaws are pivotally connected with pivot arms which are pivotally mounted at the basic element and extend divergingly from this bearing position at the basic element to the connecting points with the holding jaws. A lockable adjustment device is provided at the basic element for setting the mutual position of the pivot arms. The adjustment device includes a rod mounted at or in the basic element which is longitudinally displaceable and articulated to the pivot arms to positively control them and which, if displaced longitudinally, pivots the pivot arms. It is advantageous for the end of the rod facing the pivot arms to be connected with the pivot arms by guide arms. It is further desirable that the basic element be configured as a tube and the rod be displaceably mounted in this tube. The end of the rod remote from the pivot arms projects out of the tubular basic element and is provided with a thread onto which a nut is threaded when the rod is pushed axially into the tube, it forms a stop which lies at the end of the tube. The pivot arms are bent at right angles in the elevational direction and the individual components of the instrument are composed of a high strength light metal, preferably of titanium.

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First Claim