IL1B and Peri-Implantitis: Corroborating Cosyn et al,5Vaz et al,2Sampaio Fernandes et al,3and He et al9studied that individuals carrying the T allele of IL-1A (−889) (p = 0.006) and IL-1B (+3954) (p = 0.03) have an increased risk of peri-implantitis, based on logistic regression analysis in a nonsmoking Chinese population of 144 patients with peri-implantitis and 174 healthy control patients.9Other authors who also reported the association were Hamdy and Ebrahem,11who observed that polymorphisms in IL-1A (−889) and IL-1B (+3.954) can affect the results of treatment for peri-implantitis in genotype-positive individuals.