What should I do if I have bad breath after getting porcelain-fused-to-metal dental crowns?

If bad breath occurs after surgery, it may be due to the porcelain dental material being incompatible with the oral environment, leading to bacterial growth and resulting in halitosis. It is recommended to thoroughly brush teeth regularly and use mouthwash to maintain oral hygiene; if gum problems are detected, professional dental cleaning and treatment for gum disease may be necessary; regular dental check-ups and routine cleanings should be performed to prevent bad breath; maintaining good oral hygiene habits, such as brushing, flossing, and regular professional teeth cleaning, is essential.