As discussed in Part I of this series, an easy way to transfer the esthetics and occlusion from the diagnostic wax-up to the mouth is to use the “eggshell” provisional technique. As I explained, rather than lightly prepping the model, I inject the provisional material into the putty itself. Once the material that has been injected into the putty is set, the next step is to trim and hollow the shell. This is done in two distinct steps and can take a little bit of time to do. - See more at: http://www.speareducation.com/spear-review/2013/04/eggshell-provisionals-full-arch-cases-part-ii/#.U3cFjfl_ttw