R_Bibb_Medical_Modelling_The_Application_of_Adv.pdf

5.15 FDM TM model of the mandible.
Physical reproduction 81
VI) and the European equivalent (ISO 10993). This material, called PC-
ISO, is a polycarbonate, which makes it particularly strong compared to
most other RP materials.
The fact that the materials are opaque makes the identifi cation of internal
voids such as sinuses and nerve canals impossible. However, the white
material does tend to represent bones in a familiar manner, and models of
long bones and joints can be well modelled. These advantages can be clearly
seen in the examples illustrated in Figs 5.16 and 5.17. The advantages and
disadvantages of FDM TM are summarised in Table 5.3.
5.5 Selective Laser Sintering (SLS ® )
5.5.1 Principle
LS is similar to SL except using powders instead of liquid resins. A powerful
laser locally fuses or sinters thin layers of fi ne particulate material. The
build platform is lowered, fresh powder is applied and the next layer