Instrument for removing fractured root canal instruments and pins from tooth root canals, has wire loop changed and tightened with respect to diameter by clamping device, which comprises spring bush, adjusting bush and locking part

摘要

The instrument has a fine wire threaded as a wire loop (7) by a narrow hollow needle (6) and anchoring wire ends in a plastic body (9) that is seated in a hollow cylinder (8). The wire loop is changed and tightened with respect to diameter by a clamping device (2), which comprises a spring bush (3), an adjusting bush (4) and a locking part (5). A hammer-shaped locking rod (12) of the locking part is pushed into a recess of the plastic body of a projection (1). The projection is rotated around 90 degree around a longitudinal axis, so that the projection is locked at the clamping device.