Abstract: An orthodontic's hand instrument for installing a lingual bar on the lower arch of a patient's teeth. The hand instrument includes a handle having a first end and a second end with a clamp connected to the second end of the handle. A portion of the clamp extends a distance downwardly from the handle and another portion of the clamp extends a distance back toward the first end of the handle terminating with a clamp end. The clamp is movable to an opened position whereby a portion of the clamp near the clamp end is insertable over a portion of the lingual bar and the clamp is movable to a closed position whereby a portion of the clamp near the clamp end is clampingly closed over a portion of the lingual bar for clampingly holding the lingual bar. The clamp holding the lingual bar is movable into the patient's mouth and lowerable to position the lingual bar near the lingual side of the patient's lower teeth for connecting opposite ends of the lingual bar to the patient's lower teeth.