Dental Impression tray for preliminary edentulous impression should be selected such that the edentulous stock tray is: A 5 mm larger than outside surface of ridge B 7 mm larger than outside surface of ridge C 3 mm larger than outside surface of ridge D None of the above 💡 Explanation Impression tray for preliminary edentulous impression should be selected such that the edentulous stock tray is: ✓ Correct Answer: A. 5 mm larger than outside surface of ridge