NFE2L2 and Peri-Implantitis: To the best of our knowledge, only one study evaluated Nrf2 levels in dental peri-implantitis, suggesting an increase in Parkinsonism-associated deglycase 7, which regulates Nrf2, and increased oxidative stress measured with 8-hydroxy-deoxyguanosine, although Nrf2 expression was not altered in peri-implantitis mucosa [41].