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These with uneven teeth tend to stick the floss while flossing. It takes time to remove the floss. Besides, It's possible to stick a piece of the floss between the teeth and it's hard to get it out. What's worse, the artificial tooth (teeth) might slip out because of a violent move. Thus, the anti-stuck floss stick is equipped with a put-off function. In case the floss gets stuck, the user can easily reel off the floss to solve the annoying problem.
Oriental Institute of Technology