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The virtual biomodel as a complementary resource for the diagnosis of mandibular ankylosis
Published in Paulo Jorge Bártolo, Artur Jorge Mateus, Fernando da Conceição Batista, Henrique Amorim Almeida, João Manuel Matias, Joel Correia Vasco, Jorge Brites Gaspar, Mário António Correia, Nuno Carpinteiro André, Nuno Fernandes Alves, Paulo Parente Novo, Pedro Gonçalves Martinho, Rui Adriano Carvalho, Virtual and Rapid Manufacturing, 2007
C.H.S. Villela, P.Y. Noritomi, A.M. Silva, J.V.L. Silva, M.G.P. Cavalcanti, A.C. Passini, C.A.C. Zavaglia
The main causes for the ankylosis are trauma, local or systemic infections or congenital causes. The trauma in childhood has been related as the most important factor for causing the mandibular ankylosis, with the aggravating of leading to severe facial deformities, like the mandibular retrusion, which means that the mandible has much smaller dimensions when compared to its counterpart (maxilla) causing what is commonly known as a “bird face” (Sales et al., 2007, Manganello-Souza & Mariani, 2003 and Ko et al., 1999). This kind of deformity occurs specially when the pathology affects the condyles of both sides (Manganello-Souza & Mariani, 2003). If the pathology affect just the joint of one side, the deviation of the chin can occur towards the affected side joint with some backward displacement in this same side which contribute for an assymetric face (Ko et al., 1999).
Comparison of stress distribution of TMJ with different mandibular deformities under incisal clenching
Published in Computer Methods in Biomechanics and Biomedical Engineering, 2022
Annan Li, Bingmei Shao, Zhan Liu
Temporomandibular joint (TMJ) is the only bilateral linked joint in the human body that plays a pivotal role in physiological functions, such as chewing, swallowing, speaking and so on. Besides, it is the most frequently used load-bearing joint and can be reshaped through the whole life (Palomar and Doblaré 2006; Liu et al. 2007a, 2008). Abnormal stress distribution caused by mandibular deformities can remodel the TMJs (Inui et al. 1999), and then lead to clinical signs and symptoms, such as temporomandibular disorders (TMD). Mandibular prognathism, retrusion and deviation are three common types of mandibular deformities in the population, with a prevalence percentage of 15–23.3% (Bergersen 1980; Bishara et al. 1994; Li et al. 2011). These deformities are relevant to the symptoms such as ankylosis of TMJs, dysfunction and arthritis with joint clicking and pain (Pirttiniemi 1994; Kobayashi et al. 1999; Kawai et al. 2020). On the other hand, they can also negatively affect the aesthetic appearance of the maxillofacial region and the patient's psychology health.
Morphometric analysis of the sacrum using statistical shape modelling
Published in Computer Methods in Biomechanics and Biomedical Engineering: Imaging & Visualization, 2022
Trevor Pier, Kenneth Milligan, Zachary Wuthrich, R. Dana Carpenter, Reed Ayers, Mary Jesse, Christopher Kleck, Vikas Patel
With IRB approval, 25 female subjects were retrospectively chosen from the same control population of 223 males and females used in Jesse et al. (2017). The subjects had underwent computed tomography (CT) scanning of the kidneys, ureter and bladder (KUB) due to complaints of pain unrelated to the sacrum. The chosen subjects are meant to represent a normal population to study sacrum shape without SI joint pain. As such, subjects were excluded if they had a history of previous lumbar or thoracic fusion procedures, inflammatory/seronegative arthopathy, history of pelvic trauma or surgery, transitional segmentation, SI joint ankylosis, osteoporosis or SI degenerative disease. To create our shape model, subjects were excluded further to only include females to account for changes in shape due to sexual dimorphism. Of the female population, only CT scans with a slice thickness of less than or equal to 1.5 mm were used. Greater slice thickness did not describe the fine details of the structures adequately in preliminary qualitative tests. Finally, the subjects were further reduced to remove any images with significant image artefacts.
Total hip arthroplasty in the setting of tuberculosis infection of the hip: a systematic analysis of the current evidence
Published in Expert Review of Medical Devices, 2019
Assem A. Sultan, Sarah E. Dalton, Erica Umpierrez, Linsen T. Samuel, Emily Rose, Pierre Tamer, Jacob M. Rabin, Michael A. Mont
Major databases (PubMed, EBSCOhost, and EMBASE) were queried to perform a comprehensive literature review. Studies published between 1 October 1960 and 1 December 2017 were included. The following keywords were included along with ‘AND’ and ‘OR’ Boolean operators: ‘tuberculosis’, ‘tuberculous’, ‘total hip replacement’, ‘total hip arthroplasty,’ ‘Ankylosed,’ ‘Ankylosis,’ ‘Fused,’ ‘Fusion,’ ‘Arthrodesis,’ ‘Arthrodesed.’ Criteria for inclusion were reporting of: (1) clinical outcomes; (2) radiographic outcomes; or (3) complications of THA in current or prior TB infection of the hip joint. We excluded studies that were: (1) case reports of one or two patients; (2) not written in the English language; (3) included patients with non-tuberculosis infections; and/or (4) duplicate studies between databases. Studies that reported on THA outcomes in hip ankylosis sequelae to tuberculosis were excluded if they collectively reported on patients from multiple underlying pathologies without specifying endpoints in tuberculosis patients. These inclusion criteria were applied by two co-authors and researchers. If disagreement was encountered, a third senior independent reviewer (A.A.S) was consulted. All available electronic copies of the reports were collected. If a report was not available electronically, a digitally scanned hard copy was requested and provided through the interlibrary loan service. The PRISMA flow chart in Figure 1 illustrates the selection process.