Invisalign Power Ridge and Biomechanical Behavior of the Invisalign Aligner

invisalign power ridge

The invisalign ridges power ridge is a special bump that helps the aligner grip your teeth better and move them into place. These little plastic bumps help to increase the accuracy of your Invisalign treatment. However, they can also cause some discomfort when wearing the aligners for an extended period of time. The power ridges come in two shapes: crescent-shaped and rectangular. The crescent-shaped power ridges help to move the crown of your teeth up or down, and the rectangular ones help to move your tooth from side to side.

In this study, the authors investigated how different power ridge depth designs affected the biomechanical behavior of the incisors during invisible orthodontic treatments. They conducted a finite element simulation to reproduce the movement of a patient’s upper central incisors and tested the effects of each of four power ridge depth designs on the displacement patterns of the incisors.

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Results showed that the power ridges improved the accuracy of the incisor movements for all three directions, except for intrusion and axial rotation. Intrusion movements demonstrated the lowest accuracy for all groups, while axial movements of the lateral incisors were highly accurate. The accuracy of the movements was significantly influenced by the power ridge design, staging (movements per aligner), and the amount of planned incisor movement.

This research suggests that the power ridges should be designed to avoid causing discomfort when they are added to clear aligners for lingual root torque. Additionally, it is recommended that the clinician considers the staging and total amount of planned incisor movement when choosing an auxiliary device for achieving certain movements.

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