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|Maria Jose Jimenez Suarez|
|New York University College of Dentistry, USA|
|ScientificTracks Abstracts: Dentistry|
|The aim of the study was to compare the marginal fit of zirconia copings fabricated with two different CAD/CAM systems: Cerec InLab (Sirona®) and Zirkonzahn (Zirkonzahn®) with a pantograph system Zirkograph 025 ECO (Zirkonzahn®). Material and methods: Cr-Co master model with a zirconia crown preparation of an upper premolar was manufactured. Ten zirconia copings were fabricated for each group following manufacturer’s instructions. Control group consisted of ten metallic copings. A replica technique was used with elite HD+ polyvinyl siloxane (Zhermack®). Measurements were taken using a stereomicroscope at 50x magnification to determine the absolute marginal discrepancy and marginal width of each coping. Statistical analysis was conducted using IBM SPSS® software. T-test study was conducted in order to compare obtained data. Results showed that the mean marginal absolute discrepancy and marginal width were: 92.14±38.59 and 78.62±31.33 μm for Cerec InLab (Sirona®) CAD/CAM system, 38.71±12.62 and 36.91±13.56 μm for Zirkonzahn (Zirkonzahn®) CAD/CAM system, 77.92±38.01 and 69.42±33.23 μm for Zirkograph 025 ECO (Zirkonzahn®) pantograph system. Control group exhibited 44.11 ± 15.36 and 43.74±15.70 μm. With respect to absolute marginal discrepancy and marginal width, statistical significant differences were observed when comparing Cerec InLab (Sirona®) and Zirkograph 025 ECO (Zirkonzahn®) with control group. No statistical significant differences were observed between Zirkonzahn (Zirkonzahn®) CAD/CAM and the control group. Overall level of statistical significance was p>0.001. It can be concluded that Zirkonzahn® CAD/CAM system was the most accurate system of all. CAD/CAM Cerec InLab system (Sirona®) proved to be the less precise system.|
Maria Jose Jimenez Suarez has graduated as a Dentist from the Universidad San Francisco de Quito in Ecuador. She has published her original research study in “Revista Odontologica Mexicana”. She has worked with the intraoral scanner Trios 3SHAPE® and software in fixed prosthesis fabrication using CAD/CAM systems. She is currently attending Advanced Education Program in Prosthodontics at New York University College of Dentistry.
Email: [email protected]
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