Final answer:
Periapical x-rays are essential in dentistry as they provide a detailed view of the tooth structure, including the roots and surrounding bone.
Step-by-step explanation:
Periapical x-rays are essential in dentistry. These x-rays are used to examine the entire tooth structure, including the roots and surrounding bone. They are particularly helpful in diagnosing dental infections, abscesses, and other conditions that cannot be easily detected with a visual examination.