Introduction to four custom-made mouth protectors constructed of single and double layers for activists in contact sports.

Four mouth protectors are introduced, all manufactured by dentists familiar with small-scale technical work. Mouth protectors made of Erkoflex or Erkoloc sheets are moulded in an Erkopress device under a vacuum, while the TranSheet/Perform and TranSheet/LiteLine mouth protectors are constructed of a hard outer shell (Triad TranSheet, light-cured polyurethane dimethacrylate) and a soft inner part against the labial surface of the front teeth (Perform or LiteLine, both light-cured polyurethane dimethacrylate), thus minimizing the impact on individual teeth and better preventing dental traumas. The technical construction of the mouth protectors is illustrated, as is the need for instrumentation and its costs and the materials required to manufacture these mouth protectors.