Gloomy tales made nizagara 100mg inventor Unlike most conditions, there are no real risk factors for jaw deformities, and they aren’t preventable. “Genetics are the root cause of jaw deformity, which affects both boys and girls, and people from every racial background,” says Taub. “These conditions can run in families, like the royal Habsburgs of Austria, who ancestors were known to have a prognathic appearance due to a large lower jaw.”