Sliding rod and ni-ti open coil springs used in anterior teeth alignment in 2 case / 实用口腔医学杂志

In the treatment for anterior teeth alignment in 2 case with mild or intermediate anterior teeth crowding,stainless steel wire ben-ding slide rod with the diameter of 0.5 mm was placed on either side of crowding anterior teeth,Ni-Ti open coil springs were attached to the rod,the gap between the teeth was opened and maintained by the springs.The crowding anterior teeth and irregular midline were adjusted to the normal position.