Glossoptosis Due to Atresia and Hypotrophy of the Mandible

The article by Eley and Farber1of Boston published in theAmerican Journal of Diseases of Childrenin 1930 seems to me a precise demonstration of the conception which I presented for the first time in 1926 on hypotrophy of the mandible and its consequence, congenital or acquired glossoptosis. Dr. Armand-Delille thought this study interesting and useful and suggested my publishing in the same journal a short notice of our combined research in order to record the results of our experience. For many years I have studied dysmorphosis of the faciocraniovertebral skeleton, in particular that of the mandible. Hypotrophy of this bone is a determining cause of glossoptosis, which through the respiratory insufficiency that it produces leads to a certain physical backwardness which persists throughout infancy, childhood and adult life. In 1902 I first showed to different societies in Paris an apparatus, the "monobloc," which allows the reestablishment of