São José Dos Campos, Brazil: Orofacial trauma is common in sport, making protective mouth guards essential, and indeed mouth guards have been sold for sports use for over 100 years. A study published in a special issue of Applied Sciences provides a useful overarching review of mouth guard classifications, materials, manufacturing methods and reinforcement techniques involved in fabrication. The overview highlights the significance of standardised manufacturing methods, the need for reinforced materials and the potential of 3D-printing technology to enhance the safety and performance of athletes.