OPRO was the first and still is the only fully national school and club organisation to arrange for sports players of any age to have custom fit mouthguards made by registered dental surgeons. OPRO has grown to become the largest supplier of custom-fit mouthguards internationally and the first mouthguards in the world to achieve CE Type Certification to the latest standards.

OPRO mouthguards are worn by numerous professional and amateur sportsmen and women worldwide and the England and Leicester Tigers player, Manu Tuilagi has worn one since his youth.