The facial deformity is due to inbreeding, finds the study about the Habsburg Dynasty: The Royal Habsburg dynasty, which held the throne of the Holy Roman Empire for more than 300 years had facial deformity due to inbreeding, finds new research. Though the fall of the Habsburg dynasty is well known to be due to inbreeding, this new research adds value to it now. The researchers used the Habsburg dynasty to serve as a human laboratory to come to the finding and recently reported it in the journal Annals of Human Biology.
Professor Roman Vilas is the lead researcher from the University of Santiago de Compostela. He says that the most influential Habsburg dynasty, which was in the throne from 1438 to 1740, is renowned for inbreeding. The finding for the first time shows that there is a clear positive relationship between inbreeding and appearance of the Habsburg jaw. Though the research is based on historical figures, it thoroughly investigates the effects. Since inbreeding is still prevalent in some geographical regions, and among some religious and ethnic groups, the research was needed, is his contention.
The researchers recruited ten maxillofacial surgeons to diagnose 11 features of Habsburg jaw or mandibular prognathism face deformity. They diagnosed 66 online portraits of 15 dynasty members from their 300 years rule. They also diagnosed the seven features of maxillary deficiency, which is the most recognizable prominent lower lip and an overhanging nasal tip.