A lot of you are asking about 3D Printed Fixed Expanders. I haven’t done one yet, but I see the benefit, no spacers and great retention! It’s also potentially healthier for gums although it may increase the rate of caries.

Here’s more information from recent journal articles.

https://www.jco-online.com/archive/2021/09/571-the-cutting-edge-cementation-and-removal-of-3d-printed-expanders/

https://www.sciencedirect.com/science/article/pii/S1073874621000487

Here are some of the advantages of 3D printed expanders:
Direct mental printing saves time for both doctors and patients. There’s no need for two separate appointments. 3D printed expanders eliminate the need for uncomfortable separator visits prior to expander insertion! Since this appliance does not go in between the teeth, we no longer have to place uncomfortable separators between teeth to make space prior to the expander insertion. They are also directly adapted to the shape and curvature of your tooth anatomy, so they are less likely to collect bacteria and are smoother on your tongue. Since the entire process is digital from scan to manufacturing, there are less chances for fit errors.