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8 CASE STUDY expected from industrially manufactured abutments. In addition to high precision and reproducibility, users bene t from a broad diversity of materials and a large se- lection of original implant abutment con- nections when cooperating with the fab- rication service provider. One can expect competent support throughout the entire process chain. Standardized please: the bonding of two-piece abutments! The bonding procedure is of leading sig- ni cance here. Emphatic as we are in de- manding “customized” components, we are also explicit in referring to a “stand- ardized” procedure for bonding the tita- nium base and the zirconium oxide sleeve. A consequent protocol is to be complied with. A precondition for a secure connec- tion is given by the precise preparation of the bonding surfaces. The bonding base consists of a bonding surface, the bond- ing shoulder and the implant connection geometry. The bonding surface and the upper side of the bonding shoulder are blasted with aluminum oxide, cleaning is performed with a steam jet and in an ultra- sonic device. Attention: the underside of the bonding shoulder remains untouched from the transition to the implant on- wards. The bonding protocol is illustrated in Figures 2 to 13 . Conclusion A successful implant-prosthetic restora- tion is the result of different parameters interacting – a symphony of the treatment team’s specialist know-how, the materials and fabrication competence. The two- piece abutments can be fabricated in the laboratory, however only under perfect laboratory conditions which are virtually impossible to maintain in normal practice. Alternatively there is the option of com- bining patient-customized design with the bene ts of industrial fabrication by DEDICAM. Outlook After writing about the fabrication preci- sion and bonding of two-piece abutments in the rst part, parts 2 and 3 of the se- ries of articles will focus on precision and surface topography as well as the hygiene protocol. We will answer the questions: why can industrial fabrication be given preference in terms of precision? Does the industrially fabricated abutment need to be reworked and/or nished? Are there concrete speci cations on the rough- ness of the abutment in the sub-mucosal region and how can these be complied with? If you have questions, please send an e-mail to info@sirius-ceramics.com . [1] Gehrke P, Alius J, Fischer C, Erdelt KJ, Beuer F. Retentive strength of two-piece CAD/CAM zirconia implant abutments. Clin Implant Dent Relat Res. 2014 Dec; 16(6):920-5. doi: 10.1111/cid.12060. Epub 2013 Mar 25 LITERATURE Fig. 2: CAD construction of the abutment. Fig. 3: Placement of the titanium base on the model analog. Fig. 9: Both structures are joined after lling with Multilink ® Hybrid. Fig. 8: The bonding surface of the titanium base and the zirconium oxide sleeve are wetted uniformly with Monobond Plus. Fig. 4: Referencing of the zirconium oxide sleeve fabricated by DEDICAM on the model analog. Fig. 10: Glycerin gel is applied prior to light-curing to prevent oxygen inhibition.