Disadvantages of using a GRID is:

 # Disadvantages of using a GRID is: 
a. Increased patient exposure 
b. Decreased Patient exposure 
c. Increased fogging of the film 
d. Increased secondary radiation 

The correct answer is A. Increased patient exposure. 

Although radiographic grids reduce scattered radiation and improve contrast and resolution, they result
in higher patient exposure. Cephalometry does not require the use of grids. However, grids could improve the radiographic appearance of fine structures, such as trabecular architecture, and aid in the diagnosis of disease.

Reference: Oral radiology Principles and Interpretation, 7th Edition Stuart C. White, Michael J. Pharoah

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