Compatibility of dental ceramic masses for veneering, with selective laser melted Co Cr alloy.
Compatibility of dental ceramic masses for veneering, with selective laser melted Co Cr alloy is important in the clinical outcome of metal-ceramic restorative dental prosthesis
For a good adhesion of dental ceramic masses with the metal coping, the thermal expansion factor must be in conformity with the requirements for the ceramic masses used. The Co-Cr alloy (from S&S Scheftner CoS Starbond Powder) that we use, has the CTE value of 14,0μm/mºC and is in accordance with recommendation of most of dental ceramic masses for veneering manufacturers (VITA 13,8-15,2 ; HeraCeram 13,5-14,9 ; Degudent-Dentsply 13,8-15,4; Heraeus Kulzer 13,5-14,9; Ivoclar d.Sign 13,5-14,7; Noritake 13,4-14,5; GC 13,8-14,9; Wieland 13,8-15,1 etc.).
The test made for selective laser melted Co-cr alloy have been made in accordance with ISO 9693 ( Metal-ceramic dental restorative systems). A superior adherence was determined for selective laser melted Co-Cr alloy, better than parts made using the classic method (LWC), based on the appraisal of adherence and fracturing pattern. (reference 1)
TThe selective laser melted Co-Cr alloy coping's used in restorative dental prosthesis have superior adhesion forces (higher then minimal recommended by ISO 9693). (reference 1)
The Co-Cr alloy that we use, is in compliance with the following standards:
DIN EN ISO 14971:2009 Medical devices. Application of risk management to medical devices
DIN EN ISO 22674:2007 Dentistry - Metallic materials for fixed and removable restorations and appliances
DIN EN ISO 980:2008 Symbols for use in the labelling of medical devices
DIN EN ISO 1641:2009 Dentistry. Medical devices for dentistry. Materials
DIN EN ISO 9693:2000 Metal-ceramic dental restorative systems