Summary: An adult male (20 years old) came to our clinic with a chief complaint of lower posterior crowding. Clinical examination found mild spacing over the lower anterior teeth and lingually blocked-in lower second premolars. Because the patient didn’t want to receive extraction treatment, ISW (improved superelastic Ti-Ni alloy wire) leveling was performed to relieve lower arch crowding. Sufficient space was created by distalization with open coil spring and crimpable stopper. With ISW MEAW-like wire as reinforced anchorage over the lower arch, a satisfactory result was obtained. Meanwhile, lower left second premolar was derotated with open coil spring and elastic chain. Treatment was completed within 11 months and a stable occlusion was achieved after the active treatment.
Dong, Guan-Ling; Chen, Yuan-Hou; Yu, Jian-Hong; and Chiang, Hsien-Hsiung
"ISW (improved super-elastic Ti-Ni alloy wire) for Non-extraction Treatment of Adult Case with Linguoversion of Bilateral Lower Second Premolars,"
Taiwanese Journal of Orthodontics: Vol. 22:
4, Article 3.
Available at: https://www.tjo.org.tw/tjo/vol22/iss4/3