To enhance the effectiveness of the Mara Appliance in very deep overbite cases the U-Mara is an excellent alternative. In deep overbite cases when the mandible is advanced there is a large posterior open bite making it difficult for the patient to keep the upper elbow and lower loop properly engaged. The “U” modification addresses this problem by reversing the lower loop to provide additional millimeters of vertical engagement between the lower arm and upper elbow.
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