Wisdom tooth is at the very back of our dental arch , which makes it difficult for us to keep it clean . Henceforth , cavity development is more likely even after a filling placement. Also it depends with how much precision the cavity was excavated at first place and filled again as there can be previously perpetuating microbes and marginal leakage leading to deepening of the cavity.
Next Steps
Visit a dentist and get a thorough examination done .