CoCr dental prosthesis WIRONIUM® RP

cobalt-chromiummetalposterior teeth

Product overview
Removable partial denture (RPD) frameworks manufactured from WIRONIUM 4 RP using CAD/CAM workflows and Selective Laser Melting (SLM). Biocompatible, corrosion-resistant cobalt-based alloy specifically developed for additive production of dental RPD frameworks. Approved as a Class IIa medical device.

CAD/CAM processing solution

• 3D printing with metal powder (Selective Laser Melting) for dental applications
• CAD data controls a laser to melt metallic powder layer-by-layer to build frameworks
• Suitable for individual, complex metal frameworks

The alloy: WIRONIUM 4 RP

• Non-precious cobalt-based alloy designed for additive production of RPD frameworks
• Further development of the proven WIRONIUM 4 casting alloy
• Optimised for digital production of dental RPD frameworks using SLM
• Biocompatible and corrosion resistant
• Approved as a Class IIa medical device

Chemical composition (in %)
Co 66.2 · Cr 28.2 · Mo 5.5 · N < 1

Physical material data
Density: 8.5 g/cm³
Modulus of elasticity: 235 GPa
0.2 % Elongation limit (R0.2): 800 MPa
Ductile yield (A5): 13 %
Hardness (HV10): 395

Indications

• Clasp-retained partial dentures for upper and lower jaw, polished
• Clasp-retained partial dentures for upper and lower jaw, unpolished
• Retentions for upper and lower jaw RPD-IFR, polished
• Retentions for upper and lower jaw RPD-IFR, unpolished
• Secondary bar structures, unpolished
• Service parts, RPD repair, unpolished

Notes
Restorations are custom-made products in accordance with Directive 93/42/EEC. WIRONIUM 4 RP is a cobalt-based dental alloy and complies with ISO 22674 and ISO 9693-1.

Warnings
Metal dust is harmful to health. Grinding and blasting should be performed using an appropriate extraction system. Respiratory protection of type FFP3 EN149 is recommended.

Precautions

• In case of approximal or occlusal contact with other metals, electromechanically-related numbness may occur in very rare cases
• No findings on safety and effectiveness of treatment for children or pregnant or breastfeeding women
• WIRONIUM 4 RP may disrupt MRI analyses and should be removed before such examinations

Adverse effects
WIRONIUM 4 RP has no known adverse effects overall. Individual reactions (e.g. allergies or incompatibilities) to components can occur in very rare cases; affected restorations should no longer be used in such cases.

Highlights

• Industrial production process with heat treatment adapted to the alloy ensures an above-average fit of SLM-fabricated RPD frameworks even in complex cases
• High ductility allows activation of clasps similar to cast components; high fatigue strength due to homogeneous, pore-free structure
• High efficiency and design freedom through digitization (CAD design and CAM production); resource-efficient compared to milling
• Excellent polishing properties comparable to cast components; available on request with high-gloss polish for minimal reworking

Add-ons / Portfolio enhancements
Additional modular components for partial denture manufacturing (retentions, repair parts, polished/unpolished retentive grids and repair parts) to support laboratory workflows and customization.

Technical specifications

• Commercial name: WIRONIUM 4 RP
• Alloy type: Non-precious cobalt-based SLM alloy
• Chemical composition: Co 66.2 · Cr 28.2 · Mo 5.5 · N < 1
• Density: 8.5 g/cm³
• Modulus of elasticity: 235 GPa
• 0.2 % Elongation limit (R0.2): 800 MPa
• Ductile yield (A5): 13 %
• Hardness (HV10): 395
• Indications: clasp-retained RPDs, retentions, secondary bar structures, service parts (polished or unpolished)
• Standards / approvals: complies with ISO 22674 and ISO 9693-1; Class IIa medical device
• Processing: Selective Laser Melting (SLM) with adapted heat treatment for improved fit