Oral and Maxillofacial Radiology

Orbital cavity evaluation in a Brazilian population Alanalaiz Magalhaes Pereira, Antonio Azoubel Antunes, Evelyne Pessoa Soriano, Breno Henrique Mara Rodrigues, Vinicius Balan Santos Pereira, Gabriela Granja Porto Journal of Oral and Maxillofacial Radiology 2019 7(1):1-5 Objective: The main objective is to analyze the differences between the orbital cavities according to age and sex in a population from the Northeast of Brazil and compare with a specific Chinese population. Methodology: Linear measurements on 8 points of the orbit were made in a sample of 113 patients, based on each sex and age range (<19, 20–39, 40–59 and ≥ 60 years old). The distances were orbital width, orbital height, medial orbital wall, lateral orbital wall, superior orbital wall, inferior orbital wall, interorbital width, and biorbital width. Results: It was noticed that the orbital cavities of men were higher in all measures than those of women (P < 0.001), except for the orbital height and the distance between the orbits. Younger patients showed a tendency to have smaller orbits. Comparing the measurements obtained for the Brazilian participants with those of Chinese, the orbits of Brazilians were significantly higher on all measures (P < 0.001), except for biorbital breath. Conclusion: There were significant differences between most measures of orbital cavities between men and women in the Brazilian population, while differences were seen in all measurements between Brazilian and Chinese population.

Entrance skin dose of the thyroid gland area following exposure with different protocols of two panoramic and cone-beam computed tomography devices Bardia Vadiati Saberi, Negar Khosravifard, Tahereh Mohtavipour, Farnoosh Khaksari, Sara Abbasi, Ataollah Shahmalakpoor Journal of Oral and Maxillofacial Radiology 2019 7(1):6-11 Background: Cone-beam computed tomography (CBCT) has gained considerable use, while radiation burden remains an important concern. Aims: This study aimed at determining the entrance skin dose of the thyroid gland area through exposure with the normal, soft, and hard modes of Vatech (Pax-i) panoramic device as well as different field of views (FOVs) of Vatech (Pax-i 3D) CBCT system. Materials and Methods: Dose measurements were performed on a head-and-neck phantom by an ion chamber dosimeter. Panoramic imaging was done in three normal, soft, and hard modes, each entailing woman, man, and child options. CBCT examinations were performed with various FOVs, each having normal, soft, and hard modes as well as woman, man, and child choices. Doses obtained from different protocols of the two imaging modalities were compared by paired t-test. Results: All FOVs in CBCT resulted in greater radiation dose than panoramic in each of the normal, soft, and hard exposure modes (P < 0.05). Dose amounts for the child and adult modes differed statistically significant in panoramic radiography as well as 80 × 80 and 90 × 120 FOVs of CBCT while in 50 × 50 maxilla, 50 × 50 mandible, 50 × 80 and 150 × 150 FOVs of CBCT, The child and adult doses were almost similar. Conclusions: Even the smallest size of FOV in the soft exposure mode which is expected to have the lowest amount of radiation among CBCT protocols resulted in greater thyroid exposure compared to panoramic examination. Furthermore, care should be taken in the selection of FOV, particularly for CBCT examinations of the children.

Isolated cysticercosis of masseter muscle in a young boy with trismus: Report of a case misdiagnosed as unilateral temporomandibular joint ankylosis Jyoti Prajapat, Rajesh Prajapat, Puneeta Vohra Journal of Oral and Maxillofacial Radiology 2019 7(1):12-17 Cysticercosis is a parasitic infection caused by the larval stages of Taenia solium. Cysticercosis is a potentially fatal parasitic disease that was rarely found in the maxillofacial region. This report suggests that cysticercosis should be considered in the differential diagnosis of chronic swelling in the oral and maxillofacial region and the importance of noninvasive modality ultrasonography (USG) in diagnosis. This paper reports a case of cysticercosis in the right masseter muscle in an 11-year-old boy who presented with recurrent swelling on the right side of the face with inability to open mouth, its clinical features, diagnostic modalities used, and management of the case. Cysticercosis should be considered in the differential diagnosis of chronic oral and maxillofacial swelling. High-resolution USG is an excellent noninvasive and cost-effective modality for the diagnosis and also suggests that this parasitic infection can be successfully treated with conservative management using antihelminthic medication.

Prostatic adenocarcinoma with mandibular metastasis Kritika Saxena Journal of Oral and Maxillofacial Radiology 2019 7(1):18-20 Metastatic lesions of primary tumors comprise almost 1% of different types of oral cancers. These lesions can affect either bones or soft tissues in the maxillofacial region. Whenever the maxillofacial area is affected, the most common location is in the molar region of the mandible. A 70-year-old male patient, presented with swelling in the jaw region, of acute onset. Clinical, radiological, and histological examinations were carried out. Finally, it was diagnosed to be a metastatic lesion in the jaw, with the primary lesion being in the prostate gland. The clinical presentation of mandibular metastasis follows a pattern characterized by irradiated dental pain in the third molar region. Differential diagnosis and treatment of these patients can be extremely difficult because there are several pathologic conditions with similar symptoms.

Alexandros Sfakianakis
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