Abstract
Objectives
Shear wave elastography (SWE) are promising techniques in diagnosing temporomandibular joint (TMJ) disc and masseter muscle disorders. To investigate normative stiffness values of the TMJ disc and masseter muscle by SWE in children and adolescents.
Methods
This prospective study evaluated 123 TMJ discs and masseter muscles in 123 subjects. The stiffnesses of anterior, middle, and posterior parts of the disc and the masseter muscle were measured. This study investigated differences in mean elasticity [kilopascal (kPa)] and velocity [metre/second (m/s)] values of the different disc parts and the masseter muscle in closed and open mouth positions, and the correlations of these SWE values with age, body mass index (BMI), height, and weight of the subjects.
Results
The median stiffness disc values of all participants were 28.7 kPa (elasticity) and 3.07 m/s (velocity) for the anterior, 29.10 kPa and 3.07 m/s for the middle, and 23.2 kPa and 2.77 m/s for the posterior parts. Posterior stiffness was significantly lower than other body regions in all subjects and across all age groups. The mean stiffness values of the muscle were 16.96 ± 9.01 kPa and 2.33 ± 1.2 m/s for the closed mouth, and 28.7 ± 10.2 kPa and 3.23 ± 1.32 m/s for the open mouth.
Conclusion
The stiffness of the TMJ disc was significantly lower in the posterior part than in the anterior or middle parts. The mean stiffness was significantly higher in the open mouth than in the closed mouth position. Neither elasticity nor velocity were associated with age, height, weight, or BMI.
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Study Design was done by MÖ and EÇ; Data Collection was done by EÇ and HAH; Statistical Analysis was carried out by MÖ; Data Interpretation was carried out by EÇ; Manuscript Preparation was done by MÖ and EÇ; Literature Search was done by HAH.
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Department of Pediatric Radiology, İstanbul University, İstanbul School of Medicine, İstanbul, Turkey
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Since the report did not show any identification with the patient involved, there was no need for ethics committee approval.
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The study was approved by the Medical Ethics Committee of the Hospital, and all subjects provided written informed consent.
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All procedures performed on the reported patients were conducted in accordance with good clinical practice respectful of any human rights.
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Since the report did not show any identification with the patient involved, there was no need for ethics committee approval. Nonetheless, all procedures on the reported patient were subjected to informed consent.
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Öztürk, M., Çalışkan, E. & Habibi, H.A. Shear wave elastography of temporomandibular joint disc and masseter muscle stiffness in healthy children and adolescents: a preliminary study. Oral Radiol 37, 618–624 (2021). https://doi.org/10.1007/s11282-020-00501-7
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DOI: https://doi.org/10.1007/s11282-020-00501-7