Work Instruction COMFOUR®

39 OCCLUSALLY SCREW-RETAINED PROSTHETICS ON CAMLOG ® AND CONELOG ® BAR ABUTMENTS BASE FOR BAR ABUTMENT, LASER-WELDABLE Laser-welded bar construction with prefabricated bar bases made of pure titanium (titanium grade 4). The bar base is fixated on the bar lab analog using a brown anodized lab prosthetic screw for bar abutments, hex, corresponding to the diameter. The height of the bar base is 5.3 mm. LASER WELDING The bar elements are cut accordingly and in consideration of a joining gap that is as small as possible fitted between the bar bases. After assembling all the components, the bar segments are welded together with the bar bases under sufficient argon gas purging and the bar is pol- ished to a high gloss. The bar must be seated tension-free on the bar lab analogs. IMPORTANT NOTE ABOUT LASER WELDING Blue discoloration on the welds must be avoided. This points to insuffi- cient purging with argon gas and to oxygen uptake of the titanium. Brittleness and associated weakness in the weld is the result. Observe the operating instructions of the laser devices used! Setting up the bar bases Bar bases with fitted prefabricated bar components made of pure titanium ART. NO. ARTICLE IMPLANT Ø IN MM MATERIAL J2262.4300 J2262.6000 J4013.1601 J4013.2001 J4012.1601 J4012.2001 Base for bar abutment, laser-weldable Lab prosthetic screw for bar abutment, hex, brown anodized Prosthetic screw for bar abutment, hex, light blue anodized 3.3/3.8/4.3 5.0 3.3/3.8/4.3 (Thread M1.6) 5.0 (Thread M2.0) 3.3/3.8/4.3 (Thread M1.6) 5.0 (Thread M2.0) Titanium Grade 4 Titanium alloy Titanium alloy