Orthoses are externally applied devices used to modify the structural and functional characteristics of the neuromusculoskeletal systems; prostheses are externally applied devices used to replace, wholly or in part, an absent or deficient body segment. Included are, e.g. body-powered and externally powered external orthoses, prostheses, orthopaedic footwear. Excluded are endo-prostheses, which are not part of this document.

Devices to support the abdomen

Devices to support and hold hernia in place. Included are, e.g. hernia straps, girdles, trusses.

Interface components in direct contact with the user; they transmit the forces between the orthosis and the user which result from its function and may retain the orthosis in place. Included are, e.g. shells, pads, straps.

Finishing components are the means of providing shape, colour and texture to orthoses. Included are, e.g. fillers, covers, sleeves.