AIM: This paper introduces a new orthodontic forces system with the objective of decreasing or eliminating some secondary effects of the orthodontic mechanics, such as inclinations, extrusions and anchorage loss. Through a critical literature review on biomechanics of tooth movement, and illustrations of the construction and management of the device, its concept and clinical application are presented. CONCLUSIONS: Although other alternatives have been proposed, such as Andrew's "power-arm" or segmented arch mechanics, neither have become unanimous in the daily orthodontic routine. The Centrex might become an alternative to enhance orthodontic mechanics by means of diminishing some of its undesired effects.
Orthodontic anchorage; Mini-implants; Center of resistance
