New 3D-Printed aligners take on traditional trays in Teeth-Straightening showdown

This study tested two kinds of shape-memory aligners—one directly 3D-printed and one made by thermoforming—to see which straightens crowded lower front teeth faster and more accurately. Sixteen adults with mild to moderate crowding took part. The main goal was to measure how much crowding was relieved over the treatment time. The study also looked at how well patients followed instructions and how stable the aligner color stayed.