Comparison Between Laceback and Tie-back in Sliding Mechanics (An in vitro study)

Abstract

Aims: The current study aims to investigate the rate of space closure, tipping and rotation of canine during its retraction by laceback and tieback using standard ceramic brackets along 2 types of archwires using typodont simulation system (Ormco). Materials and Methods: The standardization criteria were all typodont teeth situated in well aligned position, covered and immobilized by the acrylic bite except canine, laceback and tieback were used to slide the canine. Results: The present study showed that when slide the canine on 0.017x 0.025 inch archwire 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 archwire, also sliding the canine using laceback as a method of retraction gave rise to a significant decrease in the rate of space closure, degree of tipping and rotation as compared with tieback. Conclusions: It was concluded that canine retraction using laceback retraction method along 0.017x0.025 inch archwire gave rise to a significant decrease in the rate of space closure, degree of tipping and rotation.

Individual canine retraction: RCT comparing Mulligan bypasses arch and Active laceback ligatures

“…Laceback ligatures are usually .009" or .010" stainless steel material which are tied in figure of 8 pattern running from molar, throught premolar into canine. 2 When these ligatures active causes retaction. 3 Mulligan bypass arch are usually made with .018" round stainless steel archwire.…”