Comparative evaluation of postfabrication thickness of thermoformed 3 mm and 4 mm mouthguards on crowded and proclined malocclusion models: An in vitro study.

Thermoforming mouthguards from 3–4 mm EVA sheets caused substantial thickness loss (40–71%), especially at anterior teeth and sulcus regions, with greater thinning in crowded versus proclined dentitions.

A plain-English summary of the study's own findings — we don't add our own claims or interpretation. Read the full paper for the complete methods and results, and apply your own clinical judgement.