EOS: Economic, Precise and Digital Additive Manufacturing (AM) of Removable Partial Dentures (RPD)

by EOS, GmbH

Cologne/Germany-EOS, the technology and market leader for design driven, integrated solutions for additive manufacturing (AM), exhibited at the 35th International Dental Show (IDS), the world’s leading fair for the dental industry.

At the show, EOS showcased its dental solutions and introduced its new removable partial denture (RPD) solution.

Thanks to a time-saving design method, the industrial manufacturing process enables a competitive edge for dental laboratories

Removable partial denture with support structures made from EOS CobaltChrome RPD (Image courtesy of EOS GmbH)

Removable partial denture with support structures made from EOS CobaltChrome RPD (Image courtesy of EOS GmbH)

Martin Bullemer, Business Development Manager Medical at EOS, adds: “A dental laboratory using the EOS AM method for the manufacturing of removable partial dentures will gain a competitive edge compared to a conventional approach. The time-saving design approach offers a more precise manufacturing process and this economic and certified process chain uses a material exclusively developed for this application. As such, RPDs can be manufactured at comparatively low costs.”

If several teeth are missing, a removable dental prosthesis is the most economical solution for the patient.

For the dental laboratory, on the other hand, the conventional manufacture of a model cast prostheses means a lot of work. The preparation of the cast model and the wax modeling based on this often takes more than one hour and the complete casting procedure including finishing is laborious and time-consuming.

The digital production method, alternatively, saves a lot of time: the design for the removable partial denture is ready in around 15 minutes with only a few mouse clicks. Thanks to the Direct Metal Laser-Sintering (DMLS) process, the manufacturing technique is not limited by the design technique. Instead, the freedom of design of the modeling software can be used to full capacity and further implemented for manufacturing. As a result, high-strength, rigid and filigree geometries can be produced and casting errors can be eliminated.

Stages of production for a laser sintered removable partial denture: Dental prosthesis directly after manufacturing, with support structures removed and surface polished, after completion (left to right-Image courtesy of EOS GmbH)

Stages of production for a laser sintered removable partial denture: Dental prosthesis directly after manufacturing, with support structures removed and surface polished, after completion (left to right-Image courtesy of EOS GmbH)

The production of RPD’s via DMLS enables accuracy and therefore makes laboratory work easier. The removable partial denture that is produced has an accuracy of +/- 20 μm and is of a consistently high quality. The method is at the same time economical too. Around 48 units can be produced within 24 hours. This corresponds to an average building time of around 30 minutes per unit.

Removable partial dentures are made with the EOSINT M 270 from EOS, which is already established on the market. The CE-certified EOS CobaltChrome (CE 0537) is used as a material for the manufacturing of RPDs.

The material properties are perfectly suited for this dental application. Density, resilience and elongation at break are well matched with the requirements of dental applications.

For the AM process, the fine powder particles produce a fine-grain structure. Compared to the cast structure the removable partial dentures produced with the aid of computers have a higher strength than a conventional model cast and both the fatigue resistances as well as the risk of a clamp breakage are lower.

The AM dental restorations possess consistent tolerances and reproducible properties, have a very high precision level, and enable a good fitting and a constant part quality. The high level of detail supports the reproduction of pitted structures. Manufacturing parameters are being documented, and part production monitored. Both the material and the machine come from EOS and satisfy the high quality standards that apply for medical products. The finished products comply with the relevant standards EN 1641 as well as EN ISO 22674.

About EOS
Founded in 1989 and headquartered in Germany, EOS is the technology and market leader for design-driven, integrated e-Manufacturing solutions for additive manufacturing (AM, or “Industrial 3D Printing”).

EOS offers a modular solution portfolio including systems, software, materials and material development as well as services (maintenance, training, specific application consulting and support). As an industrial manufacturing process it allows the fast and flexible production of high-end parts based on 3D CAD data at a repeatable industry level of quality. As a disruptive technology it paves the way for a paradigm shift in product design and manufacturing. It accelerates product development, offers freedom of design, optimizes part structures, and enables lattice structures as well as functional integration. As such, it creates significant competitive advantages for its customers. For more information please visit www.eos.info.

Our thanks to Claudia Jordan and EOS, GmbH for permission to publish content of this exciting application of Direct Metal Laser-Sintering (DMLS) process technology.

Contact:

EOS GmbH Electro Optical Systems
Claudia Jordan
Public Relations Specialist
Phone: +49 89 893 36 2134
E-Mail: [email protected]

 

 

 

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