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Masticatory muscle pain (MMP) is the most prevalent source of pain related to temporomandibular disorders. Some authors suggest that MMP may be related to the presence of myofascial trigger points (TrPs). Aim. The aim of the present study was to evaluate the immediate effect of masseter (MM) trigger point compressions technique on masticatory muscle activity and pressure pain thresholds (PPT). Material and methods. The participants were 15 healthy adults (10 women and 5 men; mean age 23.1±3.6). All participants included into the study had unilateral latent trigger points (TrPs) in the masseter muscle. Compression technique (CoT) of the latent TrPs in the masseter muscle was performed by pressing with index finger using constant, calibrated pressure of 2 kg/cm2 on the TrPs for 90 seconds. The electrical activity of the examined muscles and pressure pain thresholds for masseter muscles were recorded prior and after CoT. Results. Mean surface electrical activity of the MM muscle with TrPs and both sides of digastric muscle (DA) during resting mandibular position after CoT was significantly lower than before CoT (mean differences: MM 1=-0.783, p=0.001; DA 1=-0.312, p=0.01; DA 2=-0.229, p=0.025). Mean PPT of the MM muscles with TrPs after CoT was significantly higher comparing to baseline (1.819 vs.1.529 kg, respectively; p=0.001). Conclusions. CoT of the TrPs in masseter muscle reduces masticatory muscles resting activity. The use of CoT applied to the TrPs in masseter muscle increases pain pressure threshold. CoT may be effective in the management of MMP. (Ginszt M, Berger M, Gawda P, Bożyk A, Gawda J, Szkutnik J, Suwała M, Majcher P, Kapelan M. The immediate effect of masseter trigger points compression on masticatory muscle activity. Orthod Forum 2017; 13: 79-88).

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A -study Design, B -Data collection, C -statistical analysis, D -Data interpretation, E -Manuscript Preparation, F -literature search, G -Funds collection Background. structures of temporomandibular joints and ear have a common phylogenetic origin. Muscular imbalance in the area of masticatory muscles may lead to tinnitus. Objectives. a comparison of muscular tension and masticatory muscles asymmetry between women with tinnitus and without tinnitus. Material and methods. From a group of 96 examined responders, we found 32 women (aged 22 ± 2 years) who exhibited no temporomandibular joint disorders and who had not been treated otolaryngologically. the examined women were then placed within two groups: with tinnitus (16 people) and without tinnitus (16 people). next, we examined the muscular activity in the temporomandibular muscles by way of seMG at rest, when the teeth were clenched and when the mouth is opened maximally. to assess muscular asymmetry, the asymmetry index was used. Results. Despite the lower bioelectrical muscular tension of masticatory muscles at rest and during the examined functions in people with tinnitus, the results were not important statistically (p > 0.05). however, we observed crucial statistical differences in masseter muscle asymmetry in people with tinnitus when clenching teeth (p = 0.042), and in the number of people with muscle asymmetry in the area of the masticatory muscles at rest (p = 0.012) and when teeth are clenched (p = 0.013), in comparison to a healthy group. Conclusions. there is a relationship between changes in the asymmetry index of the masticatory muscles and the occurrence of tinnitus. in order to confirm the results, we recommend further examination in this area and longer observation time. SummaryISSN 1734-3402, eISSN 2449-8580 this is an open access article distributed under the terms of the creative commons attribution-noncommercial-sharealike 4.0 international (cc BY-nc-sa 4.0). license (http://creativecommons.org/licenses/by-nc-sa/4.0/). zieliński G, suwała M, Ginszt M, szkutnik J, Gawda P. the relationship between masticatory muscles activity and tinnitus -preliminary study. Fam Med Prim Care Rev 2019; 21(1): 66-69, doi: https://doi.

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