Clinical Research Directory

The RPD design features of fully digitally fabricated RPD illustrated in Figure 2A. Digital selective tissue placement was performed within the same Exocad design project using the free-form scan-data tool, paint and pull feature to apply the principles of selective tissue pressure technique . Using free form mesh editing tools, the buccal shelf area opposing teeth 37 and 47 was identified, and controlled tissue ward displacement of the mucosal surface was simulated while monitoring the magnitude of displacement on sectional views and with digital measurement tools.

For the CA cast technique, one of the SLM frameworks (MF2) was adapted on the stone master cast and used as a functional impression tray (Acrostone Dental Manufacturing, Cairo, Egypt) over the distal extension areas. A selec-tive pressure impression was made according to the traditional altered cast protocol, with the distal saddle areas repoured in dental stone to obtain the CA cast. This CA was then digitized using a desktop scanner (Dove Technologies, Suzhou, China) to produce the CA cast STL. Wax rims were used to verify the jaw relationship, and the maxillary cast was mounted using a facebow transfer on a semi adjustable articulator (A7 Plus, Bio-Art Equi-pamentos Odontológicos Ltda., São Carlos, SP, Brazil), while the mandibular cast was mounted in maximum intercuspation. Semi anatomic acrylic teeth (Acrostone Dental Manufacturing, Cairo, Egypt.) were arranged, and wax try ins were evaluated intraorally in a conventional manner prior to processing.