Abstract
The probe point frontal rasp is designed for intranasal operations. The probe point is so small that it will enter the same sized opening that a silver probe can enter, thereby enabling the physician to obtain an entry to the frontal opening, in most cases without forcing an instrument blindly through the floor of the frontal sinus. When the instrument has entered the opening it is gently manipulated, and the floor about the opening is broken down until the larger blunt pointed rasp, or the W. P. Reaves frontal punch, can be inserted. The teeth on these rasps are fine and sharp and cut away the edge of the floor instead of tearing it. The instruments are designed to remove as much of the floor as possible without destroying a large part of the mucosa about the nasofrontal duct. This is accomplished chiefly because the instrument is Fig. 1.—New antrum
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