Braces, but not as we know them

If anyone on the original Starship Enterprise had needed their teeth straightened, how do you think Bones, the chief medical officer, would have done it? Do you think he’d have gone for metal brackets and wires and elastics, cemented onto the teeth, or would he have chosen wafer thin, 3D printed, transparent aligners that disappear from view so that they seem to be invisible?

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