EOS' technique uses 3D data created by intraoral scanners about the patient’s mouth as the basis for the manufacturing process. This is processed without any loss of accuracy using the customised software functions of the new CAMbridge 2012 RPD module from 3Shape. The resulting virtual model is sliced and the digital information is utilised to direct a focussed laser beam to fuse metal powder in successive layers until the prosthesis is complete.
The design for the RPD is ready in around 15 minutes; plus, due to the flexibility of design possible with direct metal lasersintering (DMLS), the manufacturing process does not restrict the capabilities of the modelling software. High strength, rigid parts are produced, including filigree geometries.
The denture is produced to an accuracy of ± 20 µm and is of a consistently high quality. Around 48 units can be produced within 24 hours, corresponding to an average build time of around 30 minutes per unit, making the process economical.
RPDs are made in the EOSINT M 270 machine, and EOS CobaltChrome RPD is the powder metal used. It is a fine grained, biocompatible material free from nickel, beryllium and cadmium.
The EOSINT M 270 can make other prostheses as well as RPDs, using the cobalt-chrome-molybdenum superalloy, EOS CobaltChrome SP2, to manufacture crowns and bridges.
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