The Accuracy of High Resolution Ultrasound in the Diagnosis of TMJ Disc Displacement in Comparison With MRI

QJM ◽  
2021 ◽  
Vol 114 (Supplement_1) ◽  
Author(s):  
Hassan Mohamed Mohamed Youssef ◽  
Remon Zaher Elia ◽  
Khaled Ahmed Mohamed Ali
Keyword(s):  
Predictive Value ◽  
Mandibular Condyle ◽  
Temporomandibular Joint Disorders ◽  
Radiology Department ◽  
Disc Displacement ◽  
University Hospitals ◽  
Gold Standard Method ◽  
Anterior Disc Displacement ◽  
The Us ◽  
Tmj Disc

Abstract Background The temporomandibular joint disorders (TMD) have been a major source of pathology. Being only second to chronic low back pain as a cause of pain and disability. MRI is currently considered the gold standard method for imaging of the TMJ. USG is a non-invasive, inexpensive procedure. And can provide a potential sensitive tool for diagnosis of anterior disc displacement. Aim of the work The aim of this study is to compare between the accuracy of ultrasound and MRI in diagnosis of TMJ disc displacement. Patients and Methods This study was carried out at the Radiology Department, Ain Shams University Hospitals. Twenty one patients with clinically suspected TMJ disc displacement underwent ultrasound (US) and MRI examination. Results The overall sensitivity of the US to diagnose disc displacement compared to MRI reached (94.7%), specificity (91.3%), Positive Predictive value (90.0%), Negative Predictive Value (95%) and accuracy (92.9%). The results indicated 1.8 mm was the most accurate cut-off distance between the articular capsule and the anterior surface of the mandibular condyle for diagnosis of MR positive disc displacement.

scholarly journals High-resolution ultrasonography in assessing temporomandibular joint disc position

2018 ◽  
Vol 1 (1) ◽  
pp. 64 ◽  
Author(s):  
Daniel Talmaceanu ◽  
Lavinia Manuela Lenghel ◽  
Nicolae Bolog ◽  
Roxana Popa Stanila ◽  
Smaranda Buduru ◽  
...  
Keyword(s):  
High Resolution ◽  
Temporomandibular Joint ◽  
Predictive Value ◽  
Diagnostic Value ◽  
Degenerative Changes ◽  
Disc Displacement ◽  
Disc Position ◽  
Tmj Disc ◽  
High Resolution Ultrasonography ◽  
Disc Displacement With Reduction

Aims: The purpose of this study was to determine the diagnostic value of high-resolution ultrasonography (US) in temporomandibular joint (TMJ) disc displacements.Materials and methods: A number of 74 patients (148 TMJs) with signs and symptoms of TMJ disorders, according to the Research Diagnostic Criteria for Temporomandibular Disorders, were included in this study. All patients received US and magnetic resonance imaging (MRI) of both TMJs 1 to 5 days after the clinical examination. MRI examinations were performed using 1.5 T MRI equipment (Siemens Avanto, Siemens, Erlangen). Ultrasonographic examination was performed on a Hitachi EUB 8500 (Hitachi Medical Corp., Tokyo, Japan) scanner with L 54 M6.5-13 MHz linear transducer.Results: MRI depicted 68 (45.95%) normal joints, 47 (31.76%) with disc displacement with reduction, 33 (22.3%) with disc displacement without reduction and 34 (22.97%) with degenerative changes. US detected 78 (52.7%) normal joints, 37 (25%) with disc displacement with reduction, 33 (22.3%) with disc displacement without reduction and 21 (14.19%) with degenerative changes. Compared to MRI, US showed a sensitivity of 93.1%, specificity of 87.88%, accuracy of 90.32%, a positive predictive value of 87.1% and a negative predictive value of 93.55% for overall diagnosis of disc displacement. The Youden index was 0.81.Conclusions: Based on our results, high-resolution ultrasonography showed high sensitivity, specificity and accuracy in the diagnosis of TMJ disc displacement. It could be a valuable imaging technique in assessing TMJ disc position. The diagnostic value of high-resolution ultrasonography depends strictly on the examiner’s skills and on the equipment used. 

Thyroid Imaging Reporting And Data System (TIRADS) For Ultrasound Features Of Solitary Thyroid Nodules

QJM ◽  
2021 ◽  
Vol 114 (Supplement_1) ◽  
Author(s):  
Amr Salama A Salah ◽  
Sherif H Abu-Gamrah ◽  
Ahmed M Hussein ◽  
Haytham M Nasser
Keyword(s):  
Predictive Value ◽  
Thyroid Nodules ◽  
Histopathological Examination ◽  
Data System ◽  
Radiology Department ◽  
Histopathological Study ◽  
University Hospitals ◽  
Thyroid Imaging ◽  
Echogenic Foci ◽  
Ultrasound Features

Abstract Purpose to investigate the Thyroid Imaging Reporting and Data System (TIRADS) as a new classification system for solitary thyroid nodules by high resolution Ultrasonography in correlation with histopathological study. Materials and Methods Thirty patients with clinically suspected thyroid nodules referred to Radiology department at Ain shams University hospitals after fulfilling inclusion and exclusion criteria. All thyroid nodules are examined by ultrasound and charactrized according to internal components, margins, echogenicity, shape and evidence of echogenic foci the classified according to the American college of radiology (ACR) TIRADS guidline, then compared with histopathological examination by Fine needle aspiration cytology (FNAC) . Results Many ultrasound features were predeictors of malignancy hypoechoic echopattern, taller than wider shape, punctate echogenic foci, and lobulated and irregular margins with (p < 0.05). Risk of malignancy on TIRADS 1 and 2 nodules were 0%, also on TIRADS 3 nodules was 0%. While on TIRADS 4 and 5 nodules were 11.1% and 88.9% respectively. ROC analysis revealed sensitivity, specificity, positive predictive value (PPV), negative predictive value (NPV) and area under curve (AUC) are 100, 85.71, 75.00, 100.00 and 0.987 respectively when using cut-off value of score <5. Conclusion Our results suggest that ACR TIRADS classification is reliable in predicting thyroid malignancy. It could lead to a significant decrease of the number of unnecessary FNAC.

scholarly journals Pain Management Associated with Posttraumatic Unilateral Temporomandibular Joint Anterior Disc Displacement: A Case Report and Literature Review

2018 ◽  
Vol 2018 ◽  
pp. 1-7
Author(s):  
Arturo Garrocho-Rangel ◽  
Andrea Gómez-González ◽  
Adriana Torre-Delgadillo ◽  
Socorro Ruiz-Rodríguez ◽  
Amaury Pozos-Guillén
Keyword(s):  
Temporomandibular Joint ◽  
Cervical Vertebrae ◽  
Signs And Symptoms ◽  
Temporomandibular Joint Disorders ◽  
Diagnostic Process ◽  
Disc Displacement ◽  
Occlusal Splints ◽  
Anterior Disc Displacement ◽  
Pediatric Dentists ◽  
Disc Displacement With Reduction

The aim of the present article is to review the etiological risk factors and the general and oral management of anterior disc displacement with reduction caused by a chin trauma, and to describe the diagnostic process and the treatment provided to an affected 7-year-old girl. The patient also experienced frequent and severe cephaleas, which may be related to cervical vertebrae deviation. The patient was successfully treated with an intraoral occlusal splint and analgesics. Pediatric dentists must always be aware of the early signs and symptoms of temporomandibular joint disorders in their patients, especially in cases of orofacial trauma history, with the aim of providing an opportune resolution and preventing its progression later in life. Occlusal splints are strongly recommended for the treatment of anterior disc displacement with reduction in children and adolescents.

scholarly journals Association of Estrogen Receptor 1 and Tumor Necrosis Factor α Polymorphisms with Temporomandibular Joint Anterior Disc Displacement without Reduction

2020 ◽  
Vol 2020 ◽  
pp. 1-9
Author(s):  
Bartosz Dalewski ◽  
Agata Kamińska ◽  
Katarzyna Białkowska ◽  
Anna Jakubowska ◽  
Ewa Sobolewska
Keyword(s):  
Temporomandibular Joint ◽  
Temporomandibular Joint Disorders ◽  
Control Group ◽  
Disc Displacement ◽  
Anterior Disc Displacement ◽  
Tnf Α ◽  
Factor Α ◽  
Necrosis Factor

Objectives. The aim of this study was to investigate the role of ESR1 rs1643821 and TNF-α rs1800629 as potential genetic factors regulating anterior disc displacement without reduction-mediated inflammatory pathway. Background. The temporomandibular joint is a complex synovial joint that allows mandibular movement in three directions. Although temporomandibular disorders are widespread, limited data is available on the biochemical characteristics of the displaced disc and quality of the surrounding soft tissue. Changes in degenerative tissue provoke disc displacement which involves secretion of inflammatory markers and sequential conversion of fibroblast-like cells into chondrocyte-like cells. Due to the high occurrence in female adolescents, the potential role of sex hormones in temporomandibular joint disorders has been speculated. Furthermore, anterior disc displacement without reduction severely affects the quality of life. Methods. 124 Caucasian patients with a history of at least one anterior disc displacement without reduction within 3 months were enrolled. Anterior disc displacement without reduction was diagnosed based on clinical examination, diagnostic criteria (DC)/TMD, and cone-beam computed tomography/magnetic resonance imaging (CBCT/MRI). The control group consisted of 126 patients with no temporomandibular joint disorders. Genotyping of two single nucleotide polymorphisms, estrogen receptor 1 (ESR1) rs1643821, and tumor necrosis factor α (TNF-α) rs1800629 was performed. Results. ESR1 rs1643821 showed significant P values (using chi-square analysis) revealing the difference in anterior disc displacement without reduction frequencies while TNF-α rs1800629 polymorphism was found to be statistically insignificant when compared to the control group. Furthermore, patients with a genotype of ESR1 rs1643821 showed a decreased probability ( OR = 0.412 ) against anterior disc displacement without reduction when compared to the GG genotype ( OR = 1 ). Conclusion. ESR1 rs1643821 with A allele frequency was lower in patients with anterior disc displacement without reduction compared to the control group. Thus, the rs1643821 variant is significantly associated with susceptibility to the anterior disc displacement without a reduction in European Caucasians. Conversely, TNF-α rs1800629 was a statistically insignificant factor against anterior disc displacement without reduction when compared to the control group.

scholarly journals Vacuum Dynamics as an Alternative Method for Detection of Bimodal Milk Ejection in Dairy Cows

Animals ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 1860
Author(s):  
Matthias Wieland ◽  
Christina Marie Geary ◽  
Gloria Gioia ◽  
Kerry Lynn Case ◽  
Paolo Moroni ◽  
...  
Keyword(s):  
Dairy Cows ◽  
Predictive Value ◽  
Primary Objective ◽  
Cow Milk ◽  
Kappa Statistics ◽  
Flow Meter ◽  
Flow Curves ◽  
Cross Sectional ◽  
Gold Standard Method ◽  
Milk Flow

The primary objective of our study was to assess the ability of a vacuum recorder to detect the presence of bimodal milk flow curves in dairy cows compared with a portable milk flow meter. In a cross-sectional study, 241 individual cow milking observations were analyzed. We simultaneously collected (1) individual cow vacuum events during milking using portable vacuum recorders, and (2) individual cow milk flow curves by attaching a portable milk flow meter to the same milking unit. Presence of bimodality was assessed with the vacuum recorder visually (BIMVA) and with the gold standard method of a milk flow meter through automatic detection (BIMLA). Kappa statistics revealed moderate agreement between BIMVA and BIMLA [κ, 95% confidence intervals (95% CI) = 0.59 (0.46–0.71)]. Diagnostic test statistics for BIMVA for detection of bimodality indicated moderate performance for sensitivity [0.65 (0.52–0.76)] and positive predictive value [0.71 (0.58–0.82)] and high values for specificity [0.92 (0.87–0.95)] and negative predictive value [0.93 (0.84–0.93)]. We conclude that milking vacuum dynamics are a suitable measure to assess bimodal milk flow curves in dairy cows.

Stress analysis in human temporomandibular joint affected by anterior disc displacement during prolonged clenching

2013 ◽  
Vol 40 (4) ◽  
pp. 239-246 ◽  
Author(s):  
S. Abe ◽  
F. Kawano ◽  
K. Kohge ◽  
T. Kawaoka ◽  
K. Ueda ◽  
...  
Keyword(s):  
Stress Analysis ◽  
Temporomandibular Joint ◽  
Disc Displacement ◽  
Anterior Disc Displacement
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