###Human: How can I find out if my filled teeth have caries under the restoration? ###Assistant: Hello, Welcome to icliniq.com. Yes, there are possibilities of caries (tooth decay) underneath amalgam restorations. Please check the panoramic radiograph and see if there are any dark patches below the amalgam fillings in the teeth. It would be best if you could send a photograph of your recent panoramic radiograph (OPG), for confirmation. Your panoramic radiograph is more than enough to find out if there is secondary caries (caries underneath restorations) in your molar teeth. Intra Oral Periapical radiograph (IOPA) is the x-ray of an individual tooth. IOPA might be needed for detailed investigation of an individual tooth during later stages of treatment. You could try digital x-rays which have very low-level radiation exposure compared to conventional x-rays.