The long-term results of implant retained restorations with casted and milled frames were compared in clinical and experimental settings. Electrochemical features of milled and casted titanium by contact with titanium implant were assessed. The biocompatibility of milled and casted titanium was studied in mesenchymal stem cells culture. Cross sections were used to assess the marginal fit precision of milled and casted frames.
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Comparison of Ceramic Bonding to Cobalt-Chromium, Zirconia and Nickel-Chromium Alloys Fabricated Using of Various Techniques.
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Dental Materials Unit, Center for Dental Medicine, Clinic for Masticatory Disorders and Dental Biomaterials, University of Zurich, Zurich, Switzerland.
The purpose of this study was to evaluate the characteristics of the ceramic bonding to cobalt-chromium (Co-Cr) alloys fabricated by casting, milling, and additive manufacturing, compared with zirconia and nickel-chromium. One hundred specimens (N = 100), prepared with the dimensions of 25 × 3 × 0.5 mm, were assigned to five groups (n = 20): presintered milled Co-Cr (Group M), additively manufactured Co-Cr (Group SLM), cast Co-Cr (Group C), presintered zirconia (Group Zi), and cast Ni-Cr (Group Ni).
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Associate Professor, Dental Biomaterials Research Laboratory, Department of Restorative Dentistry, Gerald Niznick College of Dentistry, University of Manitoba, Winnipeg, Manitoba, Canada. Electronic address:
Statement Of Problem: The mechanical properties and microstructure of cobalt chromium (Co-Cr) alloys should be considered when choosing the best alloy for each clinical situation. More information is needed on the digital manufacturing methods of metals in dentistry, such as computer numerical control (CNC), and direct laser metal sintering (DMLS).
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Prosthodontics Department, Faculty of Dentistry, Minia University, Minia, Egypt.
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