Temporomandibular Joint Imaging

2020 ◽  
pp. 582-697
Author(s):  
Mark Piper, DMD MD
Keyword(s):  
Magnetic Resonance ◽  
Soft Tissue ◽  
Temporomandibular Joint ◽  
Mr Images ◽  
Anatomical Structures ◽  
Temporomandibular Joints ◽  
Key Concepts ◽  
Masticatory System ◽  
The Relationship ◽  
Insight Into

Computerized tomography (CT) and magnetic resonance (MR) imaging of the temporomandibular joint are often not a routine part of a dental patient's pain and clinical evaluation. As a result, the most poorly understood region within the masticatory system is the temporomandibular joint foundation. Unfortunately, patient care and occlusal management are often compromised because of a lack of insight into the relationship between the anatomy of the temporomandibular joints and the occlusion. This chapter's four distinct sections review the key concepts about the temporomandibular joint foundation anatomical structures, detail structurally intact and structurally altered temporomandibular joint anatomy, clarify how structurally altered temporomandibular joints influence occlusal function, and classify the stages of temporomandibular joint structural degeneration. The concept of joint-based malocclusion is explored with numerous temporomandibular joint foundation anomalous software renderings, and sample CT and MR images, which together illustrate in detail how soft tissue and bony abnormalities in a structurally altered temporomandibular joint can create distortions in the occlusion. Lastly, the chapter addresses the specific requirements a clinician must technically master to perform a comprehensive CT or MR examination.

scholarly journals Soft Tissue Sarcomas of Extremities - MRI Role in the Diagnostic Evaluation

2018 ◽  
Vol 1 (Supplement) ◽  
pp. 45
Author(s):  
A.M. Bratu ◽  
I.A. Sălcianu ◽  
C. Zaharia ◽  
G. Iana ◽  
A.N. Marinescu
Keyword(s):  
Soft Tissue ◽  
Malignant Tumors ◽  
Soft Tissue Sarcomas ◽  
Oblique Muscle ◽  
Special Importance ◽  
Fatty Tissue ◽  
Anatomical Structures ◽  
Bony Pelvis ◽  
Female Predominance ◽  
The Relationship

Abstract Introduction. Soft tissue sarcomas (STS) are rare entities of soft tissue cancers. Their incidence is low, of only 1% of the malignant tumors. In terms of localization, most of the STS affect the extremities, and their incidence is much higher in children than in adults. Material and method. The present paper is a retrospective study that includes tumors with lower limb localizations, including the bony pelvis, over a 3-year period (2013-2016). The study group consisted of 29 patients who, following the MRI examination, were diagnosed with softtissue tumors. Of the 29 patients, 17 patients had a MRI (magnetic resonance imaging) and an anatomopathological diagnosis of leiomyosarcoma. The location of the tumor, its characteristics, and the relationship with the adjacent anatomical structures were analyzed in all cases. Results. The ages of the final group of 17 patients ranged between 28 and 84 years, with female predominance. In terms of localization, one showed a muscle tumor in the pelvis, namely left oblique muscle, other cases being located in the thigh and knee. A special importance was given to the superficial and profound location. In 5 cases, the tumor was localized in subcutaneous fatty tissue, thus superficial. In terms of the contours of the tumor, well-defined margins were present in 11 cases, and poorly defined contour in 6 cases. Regarding the size, the leiomyosarcomas in our study had dimensions between 5.2 cm and 18 cm, and their structure was inhomogeneous, with the presence of necrosis and calcifications. Necrosis was found in 14 cases, and calcifications were present in 68%, being more frequent than necrosis. Except for the necrotic areas, the contrast enhancement was intense. Conclusions. Although the diagnosis is always histopathological, the MRI plays an important role in defining a precise localization and tumor characteristics.

scholarly journals CHAINS OF CONNECTION: RETHINKING THE BOURGEOISIE

2017 ◽  
Vol 15 (1) ◽  
pp. 285-301
Author(s):  
THEODORE KODITSCHEK
Keyword(s):  
Graduate School ◽  
The Other ◽  
First Year ◽  
Material World ◽  
Form Of Life ◽  
Key Concepts ◽  
Historical Role ◽  
The One ◽  
The Relationship ◽  
Insight Into

Since his first year in graduate school, Jerrold Seigel has puzzled over the relationship between modernity and the bourgeoisie. Willing to acknowledge the salience of this class in the making of the modern, he grew increasingly troubled by the failure of every effort to give a clear account of its distinctive historical role. To define the bourgeoisie as simply the group(s) in the middle, “all those who are neither peasants nor workers on the one side, nor aristocrats by birth on the other,” might be empirically accurate, he reasoned, but this provided no analytical insight into the processes of history. The Marxist alternative avoids this vacuity, but only by creating a mythology of the ascendant bourgeoisie—a class that by mere dint of its privileged relation to capital is deemed to be capable of entirely transforming the realms of culture, politics, and the material world. Dissatisfied with these conventional approaches, Seigel introduced a fundamentally new way of thinking in his seminal synthesisModernity and Bourgeois Life, which sought to replace the “traditional nominative formulation [of the bourgeoisie's role] with ones that are more adjectival and historical.” Considering “‘bourgeois’, not in terms of the rise of a class,” he has reconceptualized this term to denote “the emergence and elaboration of a certain ‘form of life’.” It is in connection with this project that Seigel developed the two key concepts that will be considered in this essay, “chains of connection” and “networks of means” (MBL, ix, 6, 25).

scholarly journals Malocclusion influence on balance and posture: a systematic review.

2015 ◽  
Vol 13 ◽  
pp. 320
Author(s):  
Tatiane Garcia Stancker ◽  
Andréia Cristina de Oliveira Silva ◽  
Hugo Pasin Neto ◽  
Cristiane Delgado Alves Rodrigues
Keyword(s):  
Systematic Review ◽  
Temporomandibular Joint ◽  
Clinical Application ◽  
Systematic Reviews ◽  
Clinical Studies ◽  
Dynamic Balance ◽  
Body Balance ◽  
The Subject ◽  
Masticatory System ◽  
The Relationship

Introduction: Malocclusion can be defined as an imbalance between the masticatory system and neuromuscular Temporomandibular joint. It is considered as a result of the sum of genetic, environmental and postural elements therefore of multifactorial origin. Objective: To review the existing literature if malocclusion influence in posture and balance of the subject. Methods: This is a systematic review, which searched up clinical studies, published between 2009 and 2014 in English, Portuguese and Spanish, in the databases SciELO, PubMed, Lilacs and Sience Direct, using the keywords malocclusion/posture and malocclusion/body balance. Studies were included that had to evaluate the posture and/or balance in patients with malocclusion, were excluded systematic reviews and studies that did not correspond to the proposed theme. Results: In addition to the articles found in all databases, the corpus generated by the literature consisted of 828 records; 13 of them responded to the proposed theme. About the selected literature, eight studies showed significant results regarding the relationship between malocclusion and posture, and two as malocclusion and body balance. Conclusion: it was concluded that malocclusion is associated with the posture of the changes, since the balance, only two studies presented this outcome and was in a considered positive for the worsening of static equilibrium, but with no clinical application, and another positive for improves dynamic balance.

scholarly journals Assessment of the anterolateral ligament of the knee by 1.5 T magnetic resonance imaging

2018 ◽  
Vol 46 (4) ◽  
pp. 1486-1495 ◽  
Author(s):  
Volkan Kızılgöz ◽  
Ali Kemal Sivrioğlu ◽  
Hasan Aydın ◽  
Türkhun Çetin ◽  
Gökhan Ragıp Ulusoy
Keyword(s):  
Magnetic Resonance ◽  
Standard Error ◽  
Interobserver Reliability ◽  
Cruciate Ligament ◽  
Intraclass Correlation ◽  
Anterolateral Ligament ◽  
Mr Images ◽  
Acl Injuries ◽  
Mean Width ◽  
The Relationship

Objective This study was performed to evaluate the visibility of the knee’s anterolateral ligament (ALL) by magnetic resonance (MR) imaging when evaluating injuries of the ALL in relation to injuries of the anterior cruciate ligament (ACL). Methods Two reviewers retrospectively analyzed MR images for the visibility and dimensions of the ALL and the relationship between ALL and ACL injuries. The intraclass correlation coefficient (ICC) and kappa analysis were used to assess interobserver reliability. The chi-square test was used to assess the relationship between ALL and ACL injuries. Results The entire ALL was viewed on 82% of all MR images. The ICC for ALL visualization ranged from moderate to perfect between the two readers. There was almost perfect agreement between the reviewers when evaluating ALL dimensions. The mean length ± standard error, median thickness, and mean width ± standard error of the ALL were 36.5 ± 0.6 mm, 2.5 mm, and 8.2 ± 0.2 mm, respectively. A statistically significant relationship was observed between ALL and ACL injuries. Conclusion The ALL was visible on most MR images, allowing ALL injuries to be noted during routine MR image interpretation. Radiologists should note concomitant ACL and ALL injuries as part of their assessments.

scholarly journals RECONSTRUCTION OF CONDYLE FOLLOWING SURGICAL CORRECTION OF TEMPOROMANDIBULAR JOINT ANKYLOSIS: CURRENT CONCEPTS AND CONSIDERATIONS FOR THE FUTURE

2014 ◽  
Vol 04 (02) ◽  
pp. 039-046
Author(s):  
Muralee Mohan C. ◽  
B. Rajendra Prasad ◽  
Smitha Bhat ◽  
Shyam S. Bhat
Keyword(s):  
Temporomandibular Joint ◽  
Animal Studies ◽  
Standard Procedure ◽  
Cost Effective ◽  
Anatomical Structures ◽  
Tmj Ankylosis ◽  
Cost Effective Approach ◽  
Masticatory System ◽  
Joint Ankylosis ◽  
Autogenous Grafts

Abstract:Temporomandibular joint (TMJ) ankylosis is one of the most disruptive maladies that can afflict the masticatory system. It is characterized by difficulty or inability to open the mouth due to fusion of the temporal bone and the condyle of the mandible, resulting in facial symmetry/deformity, malocclusion and dental problems. The only treatment option for TMJ ankylosis is surgical with or without condylar reconstruction. Various autogenous grafts are available for condylar reconstruction after freeing the ankylotic mass such as costochondral, fibular, and coronoid. Alloplastic temporomandibular joint (TMJ) prostheses can provide accurate adaptation to the anatomical structures of each individual patient and are a reliable alternative in the treatment of ankylosis. Proving to be a promising method distraction osteogenesis is slowly gaining popularity and may ultimately become the standard procedure, providing a cost-effective approach with low morbidity and excellent functional outcomes. Tissue engineering is another budding field which has shown promising results in animal studies but has not been applied to humans.

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