6 News Metal ceramics remain gold standard, review study suggests Researchers from the University of Geneva have found that metal ceramics still present better outcomes than zirconia ceramics. (Photograph: Niranjan Prabhakar) by Dental Tribune International large GENEVA, the remains diffi cult Switzerland: selection Despite of materials available on the implant market today, selecting restorative the best possible solution for clinicians. Up until now, the most investigated restorative material in prosthodontic literature is metal ceramics. Clinicians, however, increasingly tend to use zirconia for the production of implant supported single crowns and fi xed dental prostheses (FDPs). A review study, conducted by the University of Geneva, aimed to compare the long-term outcomes of zirconia ceramics and monolithic zirconia with metal ceramics before they could be considered a standard choice of dental care. For the review study, a fulltext analysis was performed with 240 articles, resulting in 19 studies on implant FDPs that met the criteria. The criteria included, among others, a mean follow-up of at least three years and a clinical examination of patients at the followup visit. The studies reported on 932 metalceramic and 175 zirconia FDPs. Metaanalysis ceramic revealed an estimated 5year survival rate of 98.7 per cent for the metalceramic, implant- supported FDPs, and 93 per cent for the zirconiaceramic, implant- supported FDPs. Thirteen studies, including 781 metalceramic, implantsupported FDPs estimated a 5year rate of ceramic fractures and chippings to be 11.6 per cent compared to a signifi cantly higher complication for zirconia- ceramic implantsupported FDPs of 50 per cent, was reported in a small study with 13 zirconia- ceramic implantsupported FDPs. Signifi cantly more of the zirconia ceramic implantsupported FDPs— 4.1 per cent—were lost due to ceramic fractures compared to only 0.2 per rate and complication rates of zirconia ceramic metalceramic multipleunit dental fi xed prostheses”, was published in the October 2018 issue of Clinical Oral Implants Research. The study was conducted in collaboration with the University of Bern and Peking University. cent of the metalceramic implant supported FDPs. A detailed analysis of factors, such as the number of units of the FDPs or the location in the jaws was not possible due to the heterogeneous nature of the reporting. For implantsupported FDPs, conventionally veneered zirconia should not be considered the material of choice, as the pronounced risk for framework fractures and chipping of the zirconia veneering ceramic was observed. No studies on monolithic zirconia implant supported FDPs met the criteria and were therefore not included in the present review. Therefore, it may be an interesting alternative, but its clinical medium to longterm outcomes have not been evaluated, yet. Hence, metal ceramics seem to remain the industry standard for implantsupported, multipleunit FDPs. The study, titled “A systematic and survival review of the 1/19 IMPRINT PUBLISHER/CHIEF EXECUTIVE OFFICER Torsten R. 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