Final answer:
Dentures should generally be left in place during artificial ventilation unless they are loose or obstruct the airway. They can actually improve the seal and support facial structures during mouth-to-mask ventilation.
Step-by-step explanation:
The correct statement regarding artificial ventilation of an apneic patient who has dentures is that dentures should be left in place during artificial ventilation. This is because well-fitting dentures can help maintain a better seal during mouth-to-mask ventilation and may provide support to the facial structures, improving the effectiveness of the ventilation. However, if the dentures are loose and obstruct the airway, or interfere with mask placement and ventilation, they should be removed.