Exactive Tie-Back - An Accurate Active Tieback.

Active tiebacks using elastomeric modules are preferred for space closure in most cases. Elastomeric ring should be stretched by equal amount on both sides for equalforce delivery and to avoid unwanted complication like shift in mid-line, asymmetric space closure. Elastic tiebacks were originally described using an elastomeric module, stretched to twice its normal size but in clinical situations, stretch of elastomeric rings are diffcult to measure intraorally.