ABSTRACT
Fixed prosthodontics rehabilitation success is closely related to the restoration retention. The latter may be influenced by several factors, such as the selected cement and the spacing between the restoration and the infrastructure. The spacing can be created directly on the working model (using diespacers) or virtually in computer models. Everest® (Kavo®) is a virtual system CAD used in the manufacturing of several oral rehabilitations structures. This study aimed to determine the optimal spacing value using different types of cement. Titanium skullcaps were made in CAD-CAM, by the Everest system (Kavo®) and was investigated the influence of spacing between these skullcaps and the massive pillars (Easy-abutment) with RP platform (Nobel Biocare®, Göterborg, Sweden) in the retention cementation. The cements used were three: zinc phosphate cement, polycarboxylate cement and zinc oxide cement without eugenol. The retention was influenced by the spacing and by the type of cement.
