One of the most exciting opportunities AM offers is for the production of custom components, specifically for medical applications. Figure 4 in Section 2.3 is a picture of a jawbone reconstruction specifically made for the patient in question. But other applications exist – see the examples in Figure 22.
The key point is that once the design is finalised, the cost and effort required to make a single instance of that design versus a large batch are similar. This is almost unheard of in manufacturing and could be called a paradigm shift.
OpenLearn - Additive manufacturing 
Except for third party materials and otherwise, this content is made available under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 Licence, full copyright detail can be found in the acknowledgements section. Please see full copyright statement for details.