Abstract
Initial study of the pig`s temporal bone anatomy in order to enable a new experimental model in ear surgery. Dissection of five temporal bones of Sus scrofa pigs obtained from UNIFESP - Surgical Skills Laboratory, removed with hole saw to avoid any injury and stored in formaldehyde 10% for better conservation. The microdissection in all five temporal bone had the following steps: inspection of the outer part, external canal and tympanic membrane microscopy, mastoidectomy, removal of external ear canal and tympanic membrane, inspection of ossicular chain and middle ear. Anatomically it is located at the same position than in humans. Some landmarks usually found in humans are missing. The tympanic membrane of the pig showed to be very similar to the human, separating the external and the middle ear. The middle ear`s appearance is very similar than in humans. The ossicular chain is almost exactly the same, as well as the facial nerve, showing the same relationship with the lateral semicircular canal. The temporal bone of the pigs can be used as an alternative for training in ear surgery, especially due the facility to find it and its similarity with temporal bone of the humans.
Highlights
Cadaver Temporal bone dissection is the base for training ear surgery
The study was accomplished in Temporal Bone Microdissection Laboratory – Federal University of São Paulo (UNIFESP with supervision and monitoring of a veterinary, following the Council for International Organization of Medical Sciences (CIOMS) ethical code for animal experimentation and obeyed the norms of the Federal Law number 6,638/1979
Five temporal bones of Sus scrofa pigs were obtained from UNIFESP - Surgical Skills Laboratory
Summary
Cadaver Temporal bone dissection is the base for training ear surgery. There is a shortage of temporal bones around the world[1]. The current Brazilian legislation establishes that only those cadavers which remain unclaimed for 30 days can be used for research and educational purposes[2]. Animal models are being investigated for otological surgery[1], because there is a constant need for increasing the surgical skills, as well as creation and development of new surgical techniques[3,4]. The greater the morphological similarities between the structures of the model and those of humans, the more valuable the model[2,3]
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