An orthodontic appliance, for example a fixed orthodontic retainer, is described that uses bonding pads with apertures extending through the bonding pads. The aperture bonding pads permit the use of a radiation curable adhesive, for example an ultra-violet (UV) light curable adhesive, to secure the bonding pads, and thus the orthodontic appliance, to the tooth surfaces. The bonding pads can be formed by a suitable additive manufacturing process, i.e. by 3D printing.