Quick Assessment Tests (packed cell volume, total solids, blood urea nitrogen) and blood gas analysis were within normal limits. Abbreviated thoracic and abdominal ultrasounds were negative for effusion in the pericardial-, pleural-, or peritoneal spaces. Neurological examination of the cranial nerves showed no signs of traumatic brain injury. Positive direct pupillary light and menace responses were observed. The right eye appeared unharmed although slightly deviated and the nictitans membrane was prolapsed. Physical examination revealed moderate deformation of the right side of his face below the eye, at the level of the zygomatic arch. Vital parameters were within normal limits. CASE REPORTĪ 5-year-old intact male Labrador retriever was presented to the Emergency Service for evaluation of suspected facial fractures after rough play with other dogs and facial trauma. ![]() This paper reports a case of right zygomatic arch fracture in a 5-year-old male Labrador Retriever, diagnosed through 3D CT reconstruction treated surgically with Veterinary Cuttable Plates. Many different surgical implants can be used to repair those fractures (Boudrieau, 2005). Although non displaced zygomatic fractures can often be treated conservatively, depressed fractures and those compromising function or threatening ocular or neurovascular structures should be reduced and stabilized (Boudrieau, 2012). Dissatisfactory imaging could lead to improper diagnosis, lack of or incorrect treatment, which could be pernicious to the patient's restoration of function and cosmetic appearance (Boudrieau, 2005). Nowadays, computed tomography (CT) has become more available to veterinarians and more affordable to pets owners (Bar-Am et al., 2008). For many years, the only diagnostic imaging modality available to assess animals with maxillofacial fractures was conventional radiographic exam however, the skull is a difficult area to study radiographically due to its very complex bone structure which leads to superimposition of important structures and makes detailed examination of individual parts difficult. Miniplate fixation for repair of mandibular and maxillary fractures in 15 dogs and 3 cats. The central structure of the zygomatic arch passes lateral to the vertical ramus of the mandible and if fractured may depress into the mandible and alter mastication while caudal fractures may interfere with the function of the mandibular condyles ( Boudrieau & Kudisch, 1996 BOUDRIEAU, R.J. Cranially, the zygomatic arch contributes to the ventral and lateral rim of the orbit ( Newton, 1985 NEWTON, C.D. The zygomatic arch is constituted cranially by the zygomatic bone and by the zygomatic process of the temporal bone caudally and gives lateral contour to the face and protects important glandular and neurovascular structures. A trauma unit’s experience-1989 fraser B. Complex craniomaxillofacial trauma: evolving concepts in management. Th and 8 th cranial nerves to leave the cranium found in the petrous portion of the bone known as the internal acoustic meatus (canal).Skull fractures in dogs can be related to concurrent trauma to the brain, eyes, and both oral and nasal cavities and may result in loss of support for the orbit, damage to the eye or associated structures ( Gruss, 1990 GRUSS, J. There is also a passageway for nerves found between the mastoid and styloid processes known logically as the stylomastoid foramen. Openings – The largest opening it the external acoustic meatus (canal) which is the tunnel that acts to funnel air vibrations to the tympanic membrane to start the sensing of auditory stimuli. It is on this process that the articular surface for the mandible is found. Just anterior to the mastoid part of the bone is the large opening of the external acoustic meatus (canal) which along with the styloid process are the main landmarks of the tympanic part of the bone.Īnteriorly the temporal bone has a process that is important to dental professionals known as the zygomatic process as it articulates with the zygomatic bone to form the zygomatic arch. This hollow area drains into the middle ear unlike other sinuses in the skull which drain into the nasal cavity. These two parts to combine to form most of the middle cranial fossa.įrom a lateral view or inferior view of the skull we can also see the large mastoid part of the bone which is mainly made up of the mastoid process mentioned earlier. ![]() This part houses the inner ear and acts to separate the middle and posterior cranial fossae. The horizontal portion of the bone that is part of the skull base is the petrous portion. The flat bone portion of the temporal bone is termed the squamous part of the bone. ![]() Parts – There are five parts that can be found in the temporal bone.
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