COMPARISON BETWEEN RETENTION OF ZIRCONIA CROWNS PRODUCED BY CAD CAM SYSTEM CEMENTED ON TIBASE AND CONVENTIONAL TITANIUM UCLAS

Resumo

Introduction: Prostheses over implants in the digital flow have been used in a number of clinical contexts with efficacy both in terms of adaptability and durability. Objective: the present study aims to compare machined zirconia crowns (Ceramill Zolid FX Multilayer - AmannGirrbach), scanned with a bench scanner (Ceramil map 300) and cemented on TiBase, which is currently the traditional method for the retention of these types of crown, and on UCLA, which represents an option to the traditional technique. Methodology: Thirty zirconia crowns divided into two groups (n=15) according to prosthetic component, G1 cemented on TiBase and G2 cemented on titanium UCLA were cemented and submitted to tensile test. Cementing was conducted with dual resinous cement Allcem, FGM. Tests were conducted in a Universal Testing Machine EMIC with load cell of 2000 kgf and speed of 0.5 mm/min. Mann-Whitney test was used to analyze the results. Calculations were done using SPSS 23 (SPSS INC., Chicago, IL, USA) and BioEstat 5.0 (Fundação Mamirauá, Belém, PA, Brasil), with 5% of significance. Results: The analyses of data showed that the zirconia crowns cemented on UCLA presented better retention than those cemented on TiBase. Conclusion: According to results shown here, cementing of zirconia crowns on titanium UCLA present better retention than those cemented on TiBase.