Final answer:
Vertical bitewings can be used in both anterior and posterior regions of the mouth, but the need to increase exposure factors when exposing vertical bitewings is usually false as dental X-ray machines use minimal radiation.
Step-by-step explanation:
The statement that vertical bitewings can be used in both anterior and posterior regions of the mouth is true. However, the claim that exposure factors such as kVp, mA, and time need to be increased when exposing vertical bitewings is typically false. Dental X-ray machines are designed to use as low radiation as possible to minimize patient exposure while still obtaining a clear image. Therefore, the same exposure settings are usually adequate for both horizontal and vertical bitewings unless there is a specific clinical need to alter them.