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  • Title: [Double scanning method for computer aided design and computer aided manufacture all-ceramic restorations].
    Author: Liu YH, Feng HL, Wang HT, Wang L, Nie YG, Wang T.
    Journal: Zhonghua Kou Qiang Yi Xue Za Zhi; 2010 Mar; 45(3):168-71. PubMed ID: 20450686.
    Abstract:
    OBJECTIVE: To introduce the double scanning for producing computer aided design and computer aided manufacture (CAD-CAM) zirconia crowns, and to compare Procera with Everest CAD-CAM system by observing clinical effects of the crowns. METHODS: Forty CAD-CAM zirconia crowns (10 crowns by Procera, and 30 crowns by Everest) were evaluated, and the examination criteria included: marginal fit, aesthetics, gingival health, retention, and fracture. All of the zirconia copings were produced using double scanning. Procera system and Everest system use contact scanner and optical scanner respectively. RESULTS: The observation time for the crowns ranged from 6 to 24 months. The results of clinic evaluation were acceptable in all restorations. CONCLUSIONS: Double scanning could be used to produce complicated zirconia copings by CAD-CAM in order to get proper symmetrical porcelain length. It was easier to make complicated coping with contact scanner than with optical scanner.
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