In vivo prediction of temporomandibular joint disc thickness and position changes for different jaw positions.

The objective of this study was to enable researchers to create high resolution representations of all structures of the TMJ and consequently investigate morphological as well as positional changes of the masticatory system. To create meshes of the bony structures, a single computed tomography (CT) scan was acquired. In addition, a high-resolution MRI sequence was produced, which is used to collect the thickness and position change of the disc for various static postures using bite blocks. Changes in thickness of the TMJ disc as well as disc translation were measured. The newly developed workflow successfully allows researchers to create high resolution models of all structures of the TMJ for various static positions, enabling the investigation of TMJ disc translation and deformation. Discs were thinnest in the lateral part and moved mainly anteriorly and slightly medially. The procedure offers the most comprehensive picture of disc positioning and thickness changes reported to date. The presented data can be used for the development of a biomechanical computer model of TMJ anatomy and to investigate dynamic and static loads on the components of the system, which could be useful for the prediction of TMD onset. PMID: 30786005 [PubMed - as supplied by publisher]
Source: Journal of Anatomy - Category: Anatomy Authors: Tags: J Anat Source Type: research

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CONCLUSIONS: It is suggested that ZTE-MRI provides clinically reliable images for bone assessment in TMJ disorder. MRI may become a beneficial diagnostic tool for patients with both TMJ disc and bone pathology, with advantages involving medical costs and radiation dose. PMID: 31670578 [PubMed - as supplied by publisher]
Source: Dentomaxillofacial Radiology - Category: Radiology Tags: Dentomaxillofac Radiol Source Type: research
Tal, Berg / Boaz, FrenkelPage 816 - 820Preauricular swelling followed by limited mouth opening can be a challenging diagnosis. All anatomical structures and related pathologies should be examined. A 41-year-old woman presented to the Emergency Room complaining of limited mouth opening, severe pain that was worse on chewing, and swelling over her right temporomandibular joint (TMJ) that had started 3 days previously. Physical examination revealed localized swelling and redness over her right TMJ. Her right masticatory muscles were very painful and tender on palpation. Mouth opening was slightly limited. A computed tomograph...
Source: Quintessence International - Category: Dentistry Source Type: research
DiscussionRadiographically, 2-D imaging is adequate to establish an initial radiographic diagnosis. However, more advanced modalities (computed tomography/magnetic resonance imaging [CT/MRI) are indicated to better evaluate the orientation of the tumor and assist in the surgical management. The 3-D imaging of the 3 cases presented here emphasize this point. Positron emission tomography/fluorodeoxyglucose (PET/FDG) imaging has also been recommended for specific cases. MRI may overestimate tumor aggressiveness secondary to the influence of bone marrow and soft tissue edema. The recognition of an osteochondroma is significant...
Source: Oral Surgery, Oral Medicine, Oral Pathology and Oral Radiology - Category: ENT & OMF Source Type: research
Conclusions: PET/CT images provide unique quantitative information that cannot be obtained from any other imaging modalities.
Source: Quintessence International - Category: Dentistry Source Type: research
Conclusion: The method of using sutures to reposition and stabilize the articular disc for a patient with comminuted fractures is effective. There is great significance not only for patients with comminuted condylar fractures but for treatment of TMJ dysfunction especially for patients with high psychological pressure who persist in requiring the removal of metallic anchors although there are no clinical symptoms.
Source: Journal of Craniofacial Surgery - Category: Surgery Tags: Brief Clinical Studies Source Type: research
This study was approved by the Animal Experimental Ethics Committee of Southern Medical University, Guangzhou, China (2014-024). All experiments were performed under protocols to meet the requirements of the Association for Assessment and Accreditation of Laboratory Animal Care International and the Experimental Animal Center of Southern Medical University. Male cynomolgus monkeys (Macaca fascicularis) were used, preliminary power analysis being performed to get the proper sample size for three groups (G∗Power 3.1, Heinrich-Heine-Universität Düsseldorf, Germany; alpha = 0.05, power = 0.95; total N = 20 hem...
Source: Frontiers in Physiology - Category: Physiology Source Type: research
CONCLUSIONS:: The CT/CBCT and MR images could be fused to aid detection of TMJ anatomical structures and related lesions. PMID: 30495970 [PubMed - as supplied by publisher]
Source: Dentomaxillofacial Radiology - Category: Radiology Tags: Dentomaxillofac Radiol Source Type: research
Publication date: Available online 13 July 2018Source: International OrthodonticsAuthor(s): Joël Ferri, Julien Potier, Jean-Michel Maes, Hervey Rakotomalala, Ludovic Lauwers, Mickael Cotelle, Romain NicotSummaryRheumatic diseases (RD) of the temporomandibular joints (TMJs) are increasingly frequent affections and unfortunately often confused with “classic” manducatory dysfunctions (disk dislocation, myofascial pain syndroms). Their diagnosis is mandatory, given the major subsequent craniofacial disorders, which may occur (mandibular condylar hypoplasia, facial hyperdivergence, remodelling of the condylar u...
Source: International Orthodontics - Category: Dentistry Source Type: research
We reported the imaging appearance and the pathological findings of 2 male cases with diffuse GCT-TS in the TMJ (52 years for the case 1 and 50 years for the case 2) who complain of the hearing disorders of left ear when presenting to our hospital. Diagnosis: Preoperative computerized tomography (CT) scan revealed an irregular mass in the left temporal fossa with the sizes of approximately 5.8 × 3.8 × 4.6 cm for case 1 and 4.2 × 3.2 × 4.3 cm for case 2, respectively. Magnetic resonance imaging (MRI) findings showed a mass of 6.1 × 4.0 × 5.1 cm and 5.3 &...
Source: Medicine - Category: Internal Medicine Tags: Research Article: Clinical Case Report Source Type: research
CONCLUSIONS The use of ultrasonography in the diagnosis of temporomandibular disorders requires standardizing the method as well as further research to confirm its effectiveness. PMID: 29420457 [PubMed - in process]
Source: Medical Science Monitor - Category: Research Tags: Med Sci Monit Source Type: research
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