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At the International Dental Show (IDS) in Cologne, EOS will highlight advanced dental e-Manufacturing solutions for dental crowns, bridges and implants.

EOS will be at booth F48 in hall 4.1 at this year’s International Dental Show (IDS) show, taking place in Cologne, Germany, on 22-26 March 2011.

This digitalised manufacturing workflow, based on laser-sintering technology, enables substantial time savings as well as parts that are characterised by excellent mechanical properties, a constant quality and a high detail resolution.

According to EOS, manufacturing with laser sintering offers the kind of cost control and flexible, rapid product cycles that will determine the future of the dental industry.

During the past year, about 1.5 million individual dental copings and bridges were manufactured in automated manufacturing centres via e-Manufacturing with the EOS laser-sinter technology.

Core of this process is the EOSINT M270, a system that produces cost-efficient dental restorations by using Direct Metal Laser Sintering (DMLS).

With this production process, dental copings and bridges made of CE 0537-certified powder, based on CAD data, can be developed within a very short time, thus enabling a dramatic automation and digitalisation shift in the dental industry.

Dental restorations have historically been produced primarily from metal through the use of casting techniques but today, the use of digital dental technology is on the rise and manufacturing processes are being automated.

Using the conventional casting production process, a dental technician can currently produce only about 20 dental frames per day.

One fully automated laser-sintering system, however, can produce approximately 450 units of dental crowns and bridges within 24 hours.

This corresponds to a production speed of approximately three minutes per unit on an average, making laser sintering an industrial process that ensures high productivity at a reduced cost.

By digitalising the work steps, it is possible to weed out error sources from the assessment of the patient to the production in the lab and to guarantee consistent high quality.

This reduces the risk of incorrect preparation or mouldings, of imprecisions in fit as well as during the finishing work, and costly repetitions.

Digital in data generation, laser sintering at the same time enables a high reproducibility of production properties and a patient-specific serial production.

At the same time, this technology is more cost effective than conventional precision casting.

As such, the software-supported workflow enables reduced processing times, permitting the dental technician to concentrate on the vital peripheral processing steps of value creation such as aesthetic and function-orientated ceramic veneering.

The technological centrepiece of dental e-Manufacturing is the Direct Metal Laser Sintering (DMLS) system EOSINT M 270.

In order to manufacture dental restorations based on this additive manufacturing method, the 3D CAD data is sliced into layers.

The system runs with an Ytterbium-fibre laser with a nominal output of 200W.

The desired geometry of dental crowns or bridges is produced in layers by selectively fusing metal powder and with the possibility of integrating identification tags.

After production has been completed, supports can easily be removed.

Since operating a DMLS system requires personnel only for loading and unpacking the machine, two production cycles per day can be executed.

For the manufacture of dental crowns and bridges, the EOSINT M 270 processes a cobalt chromium molybdenum-based super alloy, EOS Cobalt Chrome SP2.

This CE-certified material is biocompatible and inexpensive compared to precious metal alloys.

The quick solidification after melting leads to a fine and homogenous microstructure, whereas during the casting there is always a risk of overheating and segregation.

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