Transactions of the American Otological Society Volume 9-10 (Paperback)

This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated.1907 Excerpt: ... EXHIBITION OF MODELS (READING). 1)R ERNKST DE WOLFE WALES. Boston. Mass. 1. Corrosions made of porcelain showing mastoid cells, vestibule and semi-circular canals and cochlea. Instead of using wax or Wood's metal, dental clay was mixed with water and teased into the vestibular window, then to the antrum, the middle ear and auditory canal. The bone was placed in the sun for several days and then baked in a dental oven. The bone crumbles away leaving a porcelain cast. 2. A phantom useful in teaching the student to incise the drum membrane. With a jeweller's saw, saw perpendicular to the plane of the mastoid to the depth of the antrum, then saw parallel to the long axis of the pyramid cutting through the annulus tympanicus. A sheet of bond paper or gold beaters skin with a drawing of the landmarks of the drum membrane is placed over the inner section and the external section of bone is placed over the paper. If the bones are in apposition the paper seen through the external auditory canal represents the drum membrane. The advantages are (1) The temporal bone is inexpensive. (2) The distances between the drum and the inner tympanic wall are approximately correct. (3) The student has a phantom worthy of study. EXHIBITION OF A BULLET EXTRACTED FROM THE MIDDLE EAR OF PATIENT. Dr. 6. A. Leland: --Exhibited the bullet which a police officer had shot into his right ear. Case reported in Medical and Surgical Reports of Boston City Hospital, Series 15, (1905) and in "Annals of Otology, Rhinology and Laryngology," Dec. 1905, p. 679. It was imbedded in the hard bone below the promontory in such a position that if the jugular bulb had not been located lower than usual, and the carotid canal farther forward, it must have wounded one of them. Only the tip projected from the ...