Ultrastructural Changes of Cochlea Nerve Following Gunshot Wound in the Maxillofacial Region / 中华创伤杂志

This experiment was done by using the Sweden trauma model. Ten dogs, divided into two experiment groups, were hit in the lelf maxillofacial region with a small steel sphere (1.03g, 1400m/s). The specimens from the cochlea nerves were examined under electron microscope immediately (the first group) and at 6 hour (the second group) after trauma, respectively. Another four uninjured dogs were used as a crontrol (the third group). Both experiment groups were found to have mitochondrion swell, crista irregularity and break in axons of the cochlea nerves after trauma. The mechanism of the hearing loss following maxillofacial wound by high velocity missile is discussed.