A meta-analysis [28] reported that among DEFB1 (rs11362, rs1799946, and rs1800972) and MBL2 (rs7096206, rs11003125, and rs1800450) polymorphisms, just MBL2 rs11003125 had an association with the risk of DC, while another meta-analysis [19] found DEFB1 rs11362 polymorphism to be associated with the risk of DC in permanent dentition, not deciduous or mixed dentitions. This evidence concerns the gene DEFB1 and dyskeratosis congenita.