Final answer:
The need for restorative dentistry is indicated by conditions such as tooth decay, pain from thermal stress in fillings, and gum erosion. X-ray imaging helps uncover hidden decay or damage. Prompt treatment is essential for oral and overall health.
Step-by-step explanation:
Conditions indicating the need for restorative dentistry often involve symptoms and signs of oral health issues that require professional attention to prevent further damage and to restore function and aesthetics. These conditions can include visible tooth decay, thermal stress causing pain due to different expansion coefficients of fillings and enamel, and erosion of gums potentially leading to tooth loss. Moreover, x-ray imaging plays a critical role by revealing deeper decay or damage that might not be visible externally. It is important to address these issues promptly to maintain a healthy mouth and overall good health, as poor oral health can lead to malnutrition and complicate other health conditions.