Comparison between laceback and tie-back in sliding mechanics : an in vitro study

الملخص EN

Aims : the current study aims to investigate the rate of space closure, tipping and rotation of canine during its retraction by lace back and tieback using standard ceramic brackets along 2 types of arch-wires using typhoon simulation system (Armco).

Materials and Methods: The standardization criteria were all typhoon teeth situated in well aligned position, covered and immobilized by the acrylic bite except canine, lace back and tieback were used to slide the canine.

Results: The present study showed that when slide the canine on 0.017x 0.025 inch arch wire gave rise to significant decrease in the rate of space closure, degree of tipping and rotation as compared when sliding it on 0.020 inch arch wire, also sliding the canine using lace back as a method of retraction gave rise to a significant de-crease in the rate of space closure, degree of tipping and rotation as compared with tieback.

Conclusions : it was concluded that canine retraction using lace back retraction method along 0.017x0.025 inch arch wire gave rise to a significant decrease in the rate of space closure, degree of tipping and rotation.