CAMLOG Hybrid Restorations

71 HYBRID RESTORATIONS WITH THE CAMLOG ® IMPLANT SYSTEM The investment material must be matched with the cast-on alloy and the casting alloy used. We recommend phosphate bound investment materials. The manufacturer's processing instructions must be observed and the mix- ing ratios and preheating times accurately observed. We recommend you do not use any quick heating processes (speed investment materials). The cast delay time must be kept as brief as possible. INSTRUCTIONS FOR THE CAST-ON ALLOYS The cast-on alloy may not exceed the liquidus temperature of 1350°C (2462°F) in its melting range. The melting range of the high-melting cast- on gold alloy of the abutment lies between 1400°C–1490°C (2552°F– 2714°F). The cast-on alloy must be highly gold-bearing in its components and be compatible with the high-melting cast-on gold alloy. Observe the instruc- tions of the alloy manufacturer. The use of other cast-on alloys is not recommended because gold alloys with nickel or cobalt components can destroy the base part. Components of an unsuitable alloy can lead to phases with reduced corro- sion resistance, less stability or a low melting range thanks to "diffusion processes" in the border zone "casting alloy/cast-on alloy". DEVESTMENT After casting, the cast object must be slowly cooled to room temperature and the object gently devested. IMPORTANT NOTE Never use sandblasting to devest the cast; this would destroy the pre- cise fit of the CAMLOG ® abutment on the CAMLOG ® implant shoulder! We recommend gentle devestment in an ultrasonic bath with waterjet or stripping. CASTING QUALITY If the cast object exhibits casting defects after devestment such as incom- plete effluence or casting fins/bubbles over the margin onto the implant shoulder support, the work should be repeated. The precision of the prefab- ricated base part is severely affected and also the long-term success of the prosthetic restoration. TRIMMING After casting, the CAMLOG ® gold-plastic abutments can be processed on a previously prepared milling cast with suitable abrasives in the paral- lelometer.