A. A. There are two main types of dental X-rays: intraoral (meaning the X-ray film is inside the mouth) and extraoral (meaning the X-ray film is outside the mouth). 1  Intraoral X-rays are the most common type of dental X-ray taken.2  Extraoral X-rays show teeth, but their main focus is the jaw and skull.here are two main types of dental X-rays: intraoral (meaning the X-ray film is inside the mouth) and extraoral (meaning the X-ray film is outside the mouth). 1  Intraoral X-rays are the most common type of dental X-ray taken. 2  Extraoral X-rays show teeth, but their main focus is the jaw and skull.
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The force of gravity is the force exerted by the gravitational field of a massive object on any body within the vicinity of its surface.This force is dependent on three factors: the mass of the massive object, the mass of the smaller body, and the separation between the two, measured between their geometrical centers. 1 = mass of the first object (lets assume itâs of the massive one). m 2 = mass of the second object (lets assume itâs of the smaller one). r = the separation between the two masses. Notice that the gravitational force is directly proportional to m 1.