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September 1966

Incus Repositioning in Dogs

Author Affiliations

From the departments of otolaryngology and pathology, Veterans Administration Hospital and Baylor University College of Medicine, Houston, Tex. Dr. Shaver's present address is Charlotte, NC.

Arch Otolaryngol. 1966;84(3):316-319. doi:10.1001/archotol.1966.00760030318010

WHEN ABSENCE of the distal portion of the long process of the incus causes discontinuity of the ossicular chain, functional continuity may be reestablished by repositioning of the incus. This is accomplished by removing the incus and placing it between the manubrium of the malleus and the head of the stapes.1-3 Our study is concerned with the structural alterations in the ossicles of dogs after removal and repositioning of the incus.

Materials and Method  Under intravenous sodium pentobarbital (Nembutal) anesthesia, six operations were performed on four dogs. Through a postauricular incision the soft tissues covering the lateral surface of the skull were incised and elevated exposing the posterior aspect of the cartilaginous portion of the auditory canal. The cartilage was then removed, and the skin of the posterior part of the auditory canal was also removed exposing the tympanic membrane. A portion of the overhanging bone of the canal