R_Bibb_Medical_Modelling_The_Application_of_Adv.pdf

Case studies 199
6.63 The rough (a) and refi ned edges (b) and the fi nal pattern (c).
6.64 The down-facing surface on the left, and up-facing on the right.
The ThermoJet ® machine took approximately two and a half hours to
manufacture one pattern that would cost around £35. Once completed, the
pattern was allowed to cool to room temperature before the supports were
removed using a scalpel. Great care was taken not to damage the pattern
whilst removing the supports, which took around 15 minutes.
Fabrication of the silicone prosthesis
The wax pattern’s fi tting surface was smoothed by warming it briefl y and
lightly using a small fl ame torch. The pattern was then checked for fi t
on the patient (Fig. 6.65) and the fi nal margins determined. The fi t was