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Comparative evaluation of low-level laser therapy and ultrasound heat therapy in reducing temporomandibular joint disorder pain
摘要： Background: Pain, limitations in opening, asymmetrical jaw movements, and temporomandibular joint (TMJ) sounds are the most common findings in temporomandibular joint disorders (TMDs), which causes excruciating pain, inflammation of the surrounding muscles, posterior fibers, and synovial fluid. This study aimed to evaluate and compare the effects of ultrasound heat therapy and low-level laser therapy (LLLT) in reducing TMD-related pain. Methods: This prospective study included 42 patients (age range, 25–45 years), who were divided into two groups of 21 patients each. All patients were prescribed a non-steroidal anti-inflammatory drug (NSAID) twice a day for 5 days for temporary relief of pain prior to the commencement of treatment. Patients were kept on a soft diet and asked to restrict mouth opening during the same period. Fifteen sessions of LLLT (Group A) or ultrasound therapy (Group B) were administered to the affected side. Results: Post-therapy, the mean visual analog scale score for group A and group B was 4.81 (2.01) and 6.19 (1.20), respectively; the difference was statistically significant and favoring the LLLT group. Similarly, the mean mouth opening for group A and group B was 3.99 (0.40) and 3.65 (0.41), respectively; the difference was statistically significant and favoring the LLLT group. Conclusion: Our study recommends LLLT for treating TMD-related pain with no underlying bony pathology.
关键词： Ultrasonic Therapy,Temporomandibular Joint Disorders,Low-Level Laser Therapy
更新于2025-09-23 15:19:57
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Photobiostimulation activity of different low-level laser dosage on masticatory muscles and temporomandibular joint in an induced arthritis rat model
摘要： This study aimed to investigate the anti-inflammatory effects of different dosage of low-level laser therapy (LLLT) in an experimental model of temporomandibular joint (TMJ) arthritis. One hundred male Wistar rats were used and divided into the following groups: CG, control group; AG, animals group with left TMJ arthritis induced by intra-articular injection of Complete Freund’s adjuvant - CFA; LG5, LG10 and LG20 - animals with arthritis and treated with LLLT at doses 5, 10, and 20 J/cm2, respectively. Morphological analysis was performed by TMJ histological sections stained with hematoxylin-eosin (HE), picrosirius (PSR), and toluidine blue (TB), as well as histomorphometric evaluation of cartilage, articular disc, and masticatory muscles. The amount of feed consumed within 3 weeks was evaluated, and biochemical analysis of TMJ tissues included measurement of sulfated glycosaminoglycans (GAGs), matrix metalloproteinases (MMPs) 2 and 9 zymography, and ELISA for cytokines IL-6, TNF-α, and IL-1β. Only the 20 J/cm2 dose promoted higher feed intake compared to AG. On the other hand, all LLLT doses promoted better organization of articular disc collagen fibers, greater number of proteoglycans in articular cartilage, increased area and diameter of left lateral pterygoid fibers, reduced latent and active MMP 9 and 2 activity, and lower IL-1β concentration compared to AG. Considering the study limitations, it was observed that LLLT treatments were effective in protecting and tissue cleansing joint structures, accelerating tissue repair, especially at lower doses.
关键词： Arthritis,Inflammation,Low-level laser therapy,Masticatory muscles,Temporomandibular joint disorders
更新于2025-09-12 10:27:22
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Application of fused image in detecting abnormalities of temporomandibular joint
摘要： Objectives: To present a method for image fusion of cone-beam computed tomography (CBCT)/computed tomography (CT) and magnetic resonance imaging (MRI) and to explore whether the image data sets fused in such a way could aid the detection of temporomandibular joint (TMJ) anatomical structures and lesions. Methods: There were five cases included in this study. One case was space occupying lesion giant cell tumor of tendon sheaths (GCTTS), one case was chronic inflammation in the condyle, one case was articular disc calcification of the bilateral TMJs, and the other two cases were temporomandibular joint disorders (anterior disc displacement without reduction). The digital imaging and communications in medicine (DICOM) format data of CT/CBCT and MRI of the cases were collected, and then imported to the Amira visual software where the registration process was conducted. Based on the different scan model, the registration process could be separated into automatic registration of CT/CBCT with quadrature slice MR images and the semi-automatic registration of CT/CBCT with oblique slice MR images by altering the registration parameters. Rigid transform model and the similarity metric of normalization mutual information (NMI) was used for registration in the present study. Results: The relationship between the soft mass and hard tissue was shown clearly in the fused images when compared to sole observation of CBCT/CT or MR images. The fused images could define the tumor outline and the destructive bone clearly in the same image. The fused results helped the observers to ensure uncertain defects which could not be confirmed only by one image data set. Conclusions: The CT/CBCT and MR images could be fused to aid detection of TMJ anatomical structures and related lesions.
关键词： multi-detector computed tomography,magnetic resonance imaging,diagnosis,cone-beam computed tomography,temporomandibular joint
更新于2025-09-11 14:15:04
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Imaging of the Temporomandibular Joint || Growth, Development, and Ossification of Mandible and Temporomandibular Joint
摘要： Jaw joint has been the subject of a variety of basic biological researches because of its importance on mandibular development and growth as well as mammalian phylogeny. The problems associated with temporomandibular joint (TMJ) dysfunction syndrome and growth-functional adaptation’s clinical significance have greatly increased today [1]. The role of the mandibular condyle’s secondary cartilage center on the development and growth of the joint is one of the discussion topics. The idea that it is an independent primer growth center such as the epiphyseal growth plate is still sort of a dominant idea today. It is also accepted that condyle cartilage may be compatible with functional or other various factors and can affect the development of jaw-face-related functional changes during growth [1].
关键词： Temporomandibular Joint,Growth,Mandible,Ossification,Development
更新于2025-09-04 15:30:14