Surgery was often needed to make the subjects more adaptable to the driving needs of their surging onlookers.  The demands put upon them meant alterations to eyes, mouth, brain, and often times teeth.  The eyes, mouth and brain are quite obvious.  The teeth however were the most important part of reconstruction, due to their need to reach octives and screech levels far beyond any living creatures ability.  Most of the subjects that went through this laboriuos "Deconstructing of the norm" were then fitted for a special face grip.
Face Grip