R_Bibb_Medical_Modelling_The_Application_of_Adv.pdf

5.26 LOM TM model of a partial face.
Table 5.8 Advantages and disadvantages of LOM TM
Advantages Disadvantages
Physical reproduction 95
Relatively cheap machines Labour-intensive post processing
Cheap materials High maintenance and set up time
Clean safe materials Poor for thin walls and small features
Good for large, thick, simple models Waste material removal
cranial defect and the lack of undercuts and internal shape is readily apparent.
Yet, it proves economical and rapid when forming simple, solid shapes
and forms. The principal advantages of machining are its availability and
versatility. A large number of machines exist from very cheap desktop
routers to very large factory-based machine tools. Unlike most RP technologies,
machining is not restricted to a limited range of materials. Almost
any material can be machined ranging from the hardest metals to soft
foams. CNC allows machining to be carried out under computer control