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OrthoForm™ Arch Form Selection

For over a century, there has been a persistent search for the ideal arch form for human dentition. Changes to arch form during treatment may result in instability and subsequent relapse, which can contradict this search for the ideal arch form. In addition, there is an awareness that a great deal of variation exists from one human arch form to another. With this in mind, 3M Unitek provides three distinct arch forms that reconcile the variation in anterior curvature, inter-cuspid width, inter-molar width and the curvature from the cuspid to the second molars.

OrthoForm™ I Tapered Arch Form
OrthoForm I Tapered Arch Form provides the narrowest inter-cuspid width and is indicated in patients with narrow, tapered arch forms.

OrthoForm™ II Square Arch Form
OrthoForm II Square Anatomical Arch form has been designed with the varying bracket base thickness of preadjusted appliances in mind. It features a broad anterior segment and lingually-curved distal segment.

OrthoForm™ III Ovoid Arch Form
When used with settling and retention procedures, the OrthoForm III Ovoid Arch Form is designed to minimise post-treatment relapse.

All three of these arch forms complement the MBT™ Appliance System treatment philosophy. To learn more about OrthoForm arch forms and the MBT archwire sequencing philosophy, visit the Courses and Education page.

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