CLINICAL MEDICINE

MEDICINE

RADIOLOGY

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
due to ____ the teeth and surrounding structures results from underangulation of the x-ray beam
A
beam centering errors
B
horizontal alignment errors
C
foreshortening
D
elongation
Explanation: 

Detailed explanation-1: -Elongation or lengthening of the teeth and surrounding structures results from underangulation of the x-ray beam (not enough vertical angle). When elongation occurs using the paralleling technique, the angulation of the x-ray beam is less than the long axis plane of the teeth.

Detailed explanation-2: -Periapical X-rays A periapical X-ray shows your entire tooth, from the crown to the root tip. This type of X-ray helps your dentist detect decay, gum disease, bone loss and any other abnormalities of your tooth or surrounding bone.

Detailed explanation-3: -Elongation and foreshortening are caused by improper vertical angulation. Elongation (teeth look long): the x-ray tube is under Therefore the angulation should be increased. Foreshortening (teeth look short): the x-ray tube is over Therefore the angulation should be decreased.

Detailed explanation-4: -Panoramic radiography, also called panoramic x-ray, is a two-dimensional (2-D) dental x-ray examination that captures the entire mouth in a single image, including the teeth, upper and lower jaws, surrounding structures and tissues.

Detailed explanation-5: -A radiographic image is formed by a controlled burst of X-ray radiation which penetrates oral structures at different levels, depending on varying anatomical densities, before striking the film or sensor. Teeth appear lighter because less radiation penetrates them to reach the film.

There is 1 question to complete.