Comparison of the force decay over time of four different brands of elastomeric chains (elongated to 25mm grey/transparent and closed/open): An in-vitro study.

Unlabelled: Elastomeric chains are widely used by orthodontists for incisor retraction and space closure. However, force degradation and permanent deformation are expected to occur.

Objectives: The present study was designed to compare the force degradation of closed, open, grey and transparent power chains from four orthodontic companies (American orthodontics® (AO®), Dentsply®, Ormco® and Rocky Mountain Orthodontics® (RMO®)) over time.