Work Instruction COMFOUR®

54 OCCLUSALLY SCREW-RETAINED PROSTHETICS ON CAMLOG ® AND CONELOG ® BAR ABUTMENTS BASE FOR BAR ABUTMENT CAST-ON GOLD ALLOY PROPERTIES: Chemical structure (in %): Au 60 Pt 19 Pd 20 Ir 1 Mechanical properties: Density 17.5 g/cm 3 Color white Liquidus 1490° C Solidus 1400° C Coefficient of thermal expansion (25–500 °C) 12.5 m/m· °C Coefficient of thermal expansion (25–600 °C) 12.6 μm/m· °C Modulus of elasticity 136.000 GPa hardened 700 °C/30 min. Hardness HV5 210 0.2 % Elongation limit 450–570 MPa Elongation at break min. 10 % Tensile strength MPa 530–650 SOLDERABLE GOLD ALLOY PROPERTIES: BASE FOR BAR ABUTMENT Chemical structure (in %): Au 68.6 Pt 2.45 Ag 11.85 Pd 3.95 Cu 10.60 Zn 2.50 Ir 0.05 Rh – Ru – Mechanical properties: Color yellow Melting range 880–940 °C Hardness annealed HV5 175 hardened HV5 275 self-hardened HV5 240