3M Forsus Fatigue Resistant Device Kits, Class II
Fixed Class II correctors built to provide reliable, continuous force throughout orthodontic treatment without relying on patient compliance.
The Forsus Fatigue Resistant Device is a fixed functional appliance used to correct Class II malocclusion by encouraging mandibular growth or repositioning relative to the upper arch, working continuously while attached to the archwire rather than depending on the patient wearing a removable appliance for a set number of hours each day.
Because it is bonded or banded into the fixed appliance system, compliance is largely removed from the equation, which is one of the main reasons clinicians choose a fixed corrector over a removable functional appliance for patients who may not reliably wear a removable device. The kit format bundles the components needed to install the corrector on one side or both sides of the arch, including the spring assembly and mounting hardware, with the wide range of catalog numbers in this listing covering different kit sizes and configurations.
As the product name suggests, the springs are built to resist fatigue and maintain consistent force output over the months a patient wears the appliance, which supports steady progress rather than force that tapers off between adjustment visits. Forsus kits are a routine stock item for orthodontic practices that treat Class II cases with fixed correctors as part of their standard protocol.
