Answer (1 of 8): A good dental filling can last even up to 30 or more years. However, do note that the composite filling can become stained or become more yellow with time. When this happens, people often inquire about the need for their replacement; it is evident in discussion threads on online
Present status and future directions – Managing discoloured teeth - Kahler - 2022 - International Endodontic Journal - Wiley Online Library
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Fix a Stained Tooth – How to Treat Discolored Teeth After Root Canal
tooth coloured fillings, Nundah Village Dental
There are dark dots/lines on the edges of my tooth fillings. I've had these fillings for ~6 years. The dentist never said anything when I had my checkups. Is this phenomenon normal?