Figure 1. (a) Marginal gap measurement: example of a microscope picture (magnification ×40) for measuring marginal and internal gap widths. (b) measurement locations for marginal and internal gap (magnification ×7); (c) master abutment with its antirotational part; (d) cross-section of master abutment and its coping embedded in aluminum block; (e) Coping immediately after cementation under 50 N in universal testing machine; (f) shape and dimension of different parts of the coping.

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