CAMLOG Hybrid Restorations

63 HYBRID RESTORATIONS WITH THE CAMLOG ® IMPLANT SYSTEM DOUBLE CROWN RESTORATIONS INTRODUCTION For removable superstructures, we recommend inserting at least 6 implants in the maxilla and at least 4 implants in the mandible. The prosthesis design should prevent overloads by extensions. The tension-free seat of a second- ary (double crown) or primary (bar) splinted structure on implants is called as "passive fit". With double crown constructions, this is obtained through intraoral bonding of the secondary copings (e.g. electroformed copings) to a tertiary framework. The tension-free seat of the superstructure is of paramount importance for the long-term prognosis of a prosthetic restora- tion. We recommend bonding secondary copings intraorally in the tertiary framework. PRODUCT DESCRIPTION The rotational stability of the CAMLOG ® Tube-in-Tube™ connection and high precision manufacturing make the CAMLOG ® abutments ideally suited for fabrication of double crown restorations. Two different methods are used for fabricating the secondary copings: • Electroformed secondary copings. • Cast secondary copings similar to the double crown technique. IMPRESSION TAKING AND CAST FABRICATION The impression for double crown restorations with CAMLOG ® universal, telescopic and gold-plastic abutments are taken with CAMLOG ® impres- sion posts, open or closed tray. NOTE For double crown restorations with CAMLOG ® universal abutments PS, the impression is taken with CAMLOG ® impression posts PS, open or closed tray. For cast fabrication, CAMLOG ® lab analogs are used. For information about "Impression taking directly over the CAMLOG ® implant shoulder” and sub- sequent "Cast fabrication with the CAMLOG ® lab analog", see pages 12–15. CAST FABRICATION FOR MILLING TECHNIQUE For milling the CAMLOG ® abutments, we generally recommend creating a separate milling cast. The milling cast is fabricated by transferring the CAMLOG ® lab analog positions from the working cast using CAMLOG ® im- pression posts, which are connected in a transfer construction with suitable acrylic. The construction is connected with acrylic in the retentive area of the impression posts. Acrylic must not get on the fixing screws. Working cast with CAMLOG ® lab analogs Placing the CAMLOG ® impression posts, open tray