1 - The more you understand force systems and root resorption the more important controlling the linear forces in orthodontics become. To effectively use the full range of force available, and still stay below the root resorption threshold, is our goal.
To prevent root resorption many Orthodontists keep the resisting force at the apex of the roots below the root resorption threshold by reducing the applied force at the bracket so low that they loose control of the treatment. This is one reason why orthodontic treatment takes so long.
In the OrthoExpress Treatment the range of force that is applied at the bracket ranges from below 20 grams to 100 grams of linear force on each tooth depending on how the force and torque are being delivered to the root of the tooth.
2 - "Straight-Backs" (elastic modules) to apply linear force in the buccal segments that are needed for many orthodontic procedures. The more we know about how linear force at the bracket effects resisting force at the apex of the roots the more control we need to have over those forces. Heavy archwires and force control is what "Straight-Backs" are all about.
3 - OrthoExpress controls orthodontic treatment from the beginning to the end. We start treatment with very low forces until the teeth are aligned. Then the force can be increased as the teeth engage with the archwire and become more and more controlled.
"Straight-Backs" can deliver anywhere from 100 g to 800 g as needed in the buccal segments.
4 - Memory chains are another force system that we use under the archwire. You can see that the chain that goes from the upper right lateral clear to the molar and you can also see it between the upper central incisors. These two memory chains each are putting less then 20 g of force on any of these teeth.
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