An orthodontic trainer (1) for assisting the correction of the misalignment ofteeth comprising a base member (2) made of nylon having a generally U-shapedform corresponding to the outline of the jaw of a user and a teeth engagingmember (5) that encases the base member (2). The base member (2) has anopen frame structure with curved inner and outer elongate frame members (10,12) interconnected at spaced intervals by transverse frame members (15). Thecontinuous teeth engaging member (5) that is made of silicone rubber or PVCcomprises a web (40) and inner and outer flanges (44, 45) projecting up anddownfrom both upper and lower faces of the web (40). These flanges (44, 45) andtheweb (40) define upper and lower channels within which the upper and lowerteethof the user can be received.
