Custom made maxillary mouthguards made from thermoplastic materials using dental impressions give valuable protection to the teeth and jaws of participants in contact sports. A bimaxillary mouthguard has been described which offers enhanced protection, but with considerable increase in cost. This paper describes a modification to current maxillary mouthguard design that is comfortable to wear, inexpensive to make and which may provide protection comparable to that of a bimaxillary type, while retaining other desirable features of the more complex appliance.