Severe rotating maxillary central incisors were aligned by NiTi segmental arch,then 2 ×4 technique was applied to correct rota-ted teeth.The treatment was effective and convenient.%介绍一种矫治上颌中切牙重度扭转的方法。先应用 NiTi 片段弓减轻重度扭转的上颌中切牙，再用2×4矫治技术进一步矫治扭转。矫治效果良好，临床使用方便。
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