[Case of upper first molar (right side) distal movement].

The patient is a 10-year-old girl (Hellman's developmental stage IIIB) with a deficiency of upper second premolar (right side) erupting space caused by on upper first molar (right side) mesial shift). The treatment was proceeded with the looped lingual arch in the first place, the sectional arch and the open coil spring with the soldered lingual arch for reinforced anchorage in the second place. Consequently, the upper first molar (right side) was moved bodily without curve of the root in a short period, and upper second premolar (right side) erupted in a normal position.