I much prefer the terminology of Negative Model Production than casting or negative casting. In order to make a foot orthotic, then some sort of volumetric model is needed of the foot. There are so many legitimate ways to do this these days as opposed to in the past when we mostly just had the traditional plaster cast. Some of these other methods are old, but are gaining in popularity (eg foam box casting) and some have come about with advances in technology (eg digital scanning). I also like to include the term 'eye balling' as a method of negative model production, as this is the modelling that we do before using a prefabricated foot orthotic.
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