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Nova
Print version ISSN 1794-2470
Abstract
INSIGNARES ORDONEZ, Salvador; DIAZ CABALLERO, Antonio; BELENO QUINTERO, Yureinys and INSIGNARES BUELVAS, Salin. Fracture resistance of analogally made dental crowns vs cad-cam technology. In vitro study. Nova [online]. 2021, vol.19, n.36, pp.133-142. Epub Jan 17, 2022. ISSN 1794-2470. https://doi.org/10.22490/24629448.5296.
Background.
The fracture resistance of the crowns may have an influence on their appearance, according to the method of making them, either analogously or by means of Cad-Cam technology.
Objective.
To compare the resistance to the fracture of the individual crowns made by two manufacturing methods, under computer-aided design and computerized manufacturing (CAD-CAM) and injected.
Methods.
In vitro study. Sample size 20 crowns in two groups: 10 crowns using CAD-CAM technology and 10 crowns injected. Crowns were subjected to compressive loads in a universal testing machine, with a speed of 1mm / min and a cell load of 5kN until obtaining the maximum bill for these. Data were statistically analyzed using the Shapiro Wilk tests, Mann Whitney p = 0.05.
Results.
Crowns manufactured by Cad-Cam obtained a minimum of 602.5 Newton and a maximum of 1093 Newton, while the crowns manufactured analogously obtained a minimum of 525.2 Newton and a maximum of 1773 Newton in the experiment with the machine Universal test to achieve their fracture. A significant difference was obtained in the invoice resistance test between both manufacturing methods (p <0.001).
Conclusion.
Pressed Lithium Disilicate crowns obtained higher fracture resistance than crowns under design and manufacturing by computer (CAD-CAM).
Keywords : (mesh database): dental crown; flexural strength; dentistry; tooth preparation, prosthodontic; laboratories, dental.