Comparison Of Internal Adaptation Of Fixed Restorations Fabricated From Four Different Materials By A Three Axis Mill
Uniformed Services University of the Health Sciences Bethesda United States
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Introduction Internal adaptation is the space between the restoration and tooth preparation. Nakamura reported the closer the adaptation between a ceramic restoration and its abutment, the greater a crowns resistance to fracture. Ideal internal adaptation is as minimal as possible while still allowing for complete seating of the restoration. Objective This study compared the internal adaptation of maxillary anterior crowns milled from four different materials on a 3-axis milling machine. It was hypothesized there would be no difference between the test groups.
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