Computed Tomography of the Mandibles of a Stranded Offshore Killer Whale (Orcinus orca)

Publication date: April 2019Source: Journal of Comparative Pathology, Volume 168Author(s): K.N. Tang, J.N. Winer, T. McKlveen, M. Etnier, L. Legendre, M. Haulena, M.A. Delaney, J.K. GaydosSummaryA mature, adult female, offshore killer whale (Orcinus orca) was stranded deceased in Portage Bay, Alaska, in October 2015. Full necropsy examination with histopathology was performed. Consistent with previous studies of offshore killer whales, and thought to be a result of their unique elasmobranch diet, all the teeth were significantly abraded and almost flush with the gingival margin. Age was estimated at 30–35 years based on annuli and growth arrest lines in a remaining tooth. The dentate portion of the mandibles were excised en bloc and frozen until imaging could be completed. Radiography and computed tomography revealed lesions consistent with severe abrasion, pulp exposure and evidence of endodontic and/or periodontal disease in nine of the 15 mandibular teeth present (60.0%). Only five (33.3%) teeth were suspected to have been vital at the time of death based on imaging. Lesions were more severe rostrally, with the caudal teeth less affected. Autolysis precluded gingival histopathology and no teeth were analyzed histologically. Necropsy examination revealed a likely multifactorial cause of death, with most significant lesions including the severe chronic periodontal/endodontic disease with abrasion, inanition and emaciation with possible cardiovascular disease. This case...
Source: Journal of Comparative Pathology - Category: Pathology Source Type: research

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Conclusions: During MIS pedicle screw fixation, this study recommends that pedicle screws should not exceed 85% of the vertebral body length on the lateral view for L1, 80% for L2-L4, and 75% for L5; this will minimize the risk of anterior cortical breach yet maximize pedicle screw purchase for fixation stability. PMID: 31309769 [PubMed - as supplied by publisher]
Source: Asian Spine Journal - Category: Orthopaedics Tags: Asian Spine J Source Type: research
Publication date: Available online 16 July 2019Source: Journal of Oral and Maxillofacial Surgery, Medicine, and PathologyAuthor(s): Shunsuke Tanio, Takayuki Tamura, Hiroshi Kasuya, Makoto Kawasaki, Naomi Taniguchi, Kazuma Otsuki, Nobuyuki Fujii, Isamu KodaniAbstractA surgical ciliated cyst, also referred as a locally aggressive lesion, stems from a prior surgery several years later as a delayed complication. It is reported that the cyst develops after orthognathic surgery. A 25-year-old man who had undergone Le Fort I osteotomy and bilateral intraoral vertical osteotomy of the mandible as treatment for jaw deformities in 2...
Source: Journal of Oral and Maxillofacial Surgery, Medicine, and Pathology - Category: ENT & OMF Source Type: research
Publication date: Available online 15 July 2019Source: Oral Surgery, Oral Medicine, Oral Pathology and Oral RadiologyAuthor(s): Andy Wai Kan Yeung, Bruno Azevedo, William C. Scarfe, Michael M. BornsteinAbstractThis case series describes a reconstruction method applied to a cone beam computed tomography (CBCT) projection dataset that uses selected basis projection images to improve diagnostic image quality for patients who moved during radiographic procedure. Reconstructed volumetric data from six patients at two institutions initially exhibited characteristic double contour images due to motion artifacts. For each case, th...
Source: Oral Surgery, Oral Medicine, Oral Pathology and Oral Radiology - Category: ENT & OMF Source Type: research
ConclusionsThe prevalence of OLTS is very high following intra-articular calcaneal fractures. Most lesions occur at anterior or central area of posterior talar facet and are more likely to occur in patients with higher fracture severity. Lesion severity was significantly higher in patients with double lesions than patients with single lesions.
Source: European Journal of Orthopaedic Surgery and Traumatology - Category: Orthopaedics Source Type: research
CONCLUSION: Although functional results demonstrated that multiple CMC joint fracture dislocations can be treated with ORIF, the high rate of osteoarthritis is a disadvantage. PMID: 31291861 [PubMed - in process]
Source: Eklem Hastaliklari ve Cerrahisi - Category: Orthopaedics Tags: Eklem Hastalik Cerrahisi Source Type: research
CONCLUSIONS: 40.5% of patients with single-system facial trauma received both plain radiographs as well as CT imaging. Additionally, 82.1% of all patients who had plain radiographs went on to have a further facial CT. Furthermore, 70% of these patients were surgically managed, inferring that this population may have benefitted from receiving a CT scan from the outset. This is not in line with the standard for pre-operative imaging of midface fractures in the literature, and a clinical pathway could be implemented across the Midland district health boards to guide the clinician in requesting appropriate pre-operative imagin...
Source: New Zealand Medical Journal - Category: General Medicine Tags: N Z Med J Source Type: research
In this study, we focused on the methods to assess image quality of these techniques, except for digital cephalography, in the light of historical issues. We stressed on the importance of the development of a standardized phantom and quantitative analysis of diagnostic image quality using it, especially in the aspect of psychophysical properties of these digital systems. There is no missing link in the image quality assessment in digital intraoral radiography and cone-beam computed tomography in dental use. However, there are missing links between physical and diagnostic image qualities in panoramic radiography. The develo...
Source: Oral Radiology - Category: Radiology Source Type: research
Authors: Terlemez A, Tassoker M, Kizilcakaya M, Gulec M Abstract Purpose: The aims of this study were first, to compare panoramic radiography with cone-beam computed tomography (CBCT) for evaluating topographic relationships, such as the classification of maxillary posterior teeth and their distance to the maxillary sinus floor; and second, to determine the relationship between maxillary sinus pathology and the presence of apical lesions. Materials and Methods: In total, 285 paired CBCT and panoramic radiography records of patients (570 maxillary sinuses) were retrospectively analyzed. Both imaging modalities w...
Source: Imaging Science in Dentistry - Category: Dentistry Tags: Imaging Sci Dent Source Type: research
ConclusionsThe study concluded that the presence of pathology in the maxillary sinus before surgery does not affect the survival rates of dental implants placed simultaneously with sinus augmentation. The most common pathology noted included mucosal thickening (61.4%), which was detected in 35 patients.
Source: Oral Radiology - Category: Radiology Source Type: research
5 years ago, a then 50-year-old woman presented with long-standing fatigue, dyspnoea and a chronic productive cough. Based on a computed tomography scan of the thorax and multiple positive cultures, she was diagnosed with nodular–bronchiectatic Mycobacterium avium pulmonary disease; she was also found to have a heterozygous F508del CFTR gene mutation. She commenced therapy with rifabutin 300 mg once daily, ethambutol 1200 mg once daily and azithromycin 500 mg once daily. After 15 months of ongoing symptoms, radiographic deterioration and persistent culture positivity, clofazimine 100 mg ...
Source: European Respiratory Journal - Category: Respiratory Medicine Authors: Tags: Original Articles: Research letters Source Type: research
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