Abstract: A fastener comprises a body part, fastening means for fixing the fastener to a first object, a mounting part for mounting a second object to the fastener, and connecting means connecting the body part and the mounting part. The mounting part is rotatable and pivotable relative to the body part so as to assume a predetermined orientation relative to the body part, and the body part is retractable from the mounting part. The fastener is adjustable between at least two operational states, a first operational state, in which the body part and the mounting part are adjacent to each other, or a second operational state, in which the body part is retracted from the mounting part so that the body part and the mounting part are spaced apart from each other.

Abstract: A fastener comprises a body part, fastening means for fixing the fastener to a first object, a mounting part for mounting a second object to the fastener, and connecting means connecting the body part and the mounting part. The mounting part is rotatable and pivotable relative to the body part so as to assume a predetermined orientation relative to the body part, and the body part is retractable from the mounting part. The fastener is adjustable between at least two operational states, a first operational state, in which the body part and the mounting part are adjacent to each other, or a second operational state, in which the body part is retracted from the mounting part so that the body part and the mounting part are spaced apart from each other.

Abstract: A surgical method utilizes a cutting blade having a thickness along a cutting edge of between about 0.0005 inch and about 0.020 inch and preferably between about 0.001 inch and 0.010 inch. The blade is moved in contact with relatively hardly tissues which are disposed adjacent to softer tissues at a surgical site in a patient. The blade is ultrasonically vibrated during the moving of the blades, whereby the hard tissue is cut with a modicum of damage being inflicted on the soft tissue.

Abstract: A surgical method utilizes a cutting blade having a thickness along a cutting edge of between about 0.0005 inch and about 0.020 inch and preferably between about 0.001 inch and 0.010 inch. The blade is moved in contact with relatively hardly tissues which are disposed adjacent to softer tissues at a surgical site in a patient. The blade is ultrasonically vibrated during the moving of the blades, whereby the hard tissue is cut with a modicum of damage being inflicted on the soft tissue.

Abstract: A surgical method utilizes a cutting blade having a thickness along a cutting edge of between about 0.0005 inch and about 0.020 inch and preferably between about 0.001 inch and 0.010 inch. The blade is moved in contact with relatively hardly tissues which are disposed adjacent to softer tissues at a surgical site in a patient. The blade is ultrasonically vibrated during the moving of the blade, whereby the hard tissue is cut with a modicum of damage being inflicted on the soft tissue.

Abstract: The present invention relates to a light beam emission device for a measuring device for changing the optical properties of a light beam as well as to a corresponding method and to a measuring instrument which uses the light beam emission device, wherein the optical properties of the light beam can be changed automatically thereby from one state to another state.