Abstract:

The structural theory and fabrication of a self- designed rotating auxiliary spring in edgewise technique were described. Rotating auxiliary spring was applied to correct rotated tooth in clinic. It indicated that rotating auxiliary spring was an easy- fabricated, convenient- manipulated device, and could produce an effective treatment results in correcting rotated tooth, especially in the final adjustment stage.

Key words: rotating auxiliary spring, edgewise technique, rotated tooth, orthodontical treatment