1.New plastic poly-wedges.
2.Round stern with a hole.
3.Easily of being taken.
4.Round edge with unattached.
5.Make the wedges more flexibility to be full filled in different teeth cracks.
6.Much safer and more convenient to insert to the crack of the teeth.
7.The human nature design easily makes the wedges insert into the crack of the crack of the teeth.
8.Protect the gingiva from damage; Square design for bottom more convenient to hold.
9.Anatomically shaped interdental & Soft plastic.
10. Four sizes special design ,can be held firmly.