※ This is not dental floss. Used only 2-3 times, so almost all of it remains. It has been opened, and the number of pieces is unconfirmed, so please refrain from purchasing if you are concerned. Recommended for those undergoing orthodontic treatment who find it difficult to use floss. Floss Threader X Threader for Orthodontics and Bridges *Product Description* Recommended for those undergoing orthodontic treatment or those with bridges. This tool makes it easy to insert floss between orthodontic brackets or under bridges. Please thread floss through the hole and use.