List the advantages of IOPA and OPG
a) Advantages of IOPA are as follows
It is a useful high yield modality for ruling out local bone or dental disease
It is of value in identifying critical structures
Advantages of OPG are
Opposing landmarks are easily identified
The vertical height of the bone initialy can be assessed
The procedure is performed with convenience, ease and speed in most dental offices
Gross anatomy of the jaws and any related pathologic findings can be evaluated