Cited by 73Temporomandibular Joint DisordersMyofascial pain diagnosis and treatmentMuscle activation and electromyography studies

The Application of Manual Techniques in Masticatory Muscles Relaxation as Adjunctive Therapy in the Treatment of Temporomandibular Joint Disorders

Open access
Urbański, Piotr, Trybulec, Bartosz, Pihut, Małgorzata·2021·International Journal of Environmental Research and Public Health

Abstract

Temporomandibular disorders (TMD) are primarily characterized by pain as well as disorders concerning the proper functioning of individual elements of the stomatognathic system (SS). The aim of the study was to compare the degree of relaxation of the anterior part of the temporal muscles and the masseter muscles, achieved through the use of post-isometric relaxation and myofascial release methods in patients requiring prosthetic treatment due to temporomandibular joint disorders with a dominant muscular component. Sixty patients who met the inclusion criteria were alternately assigned to one of the two study groups, either group I—patients received post-isometric relaxation treatment (PIR), or group II—patients received myofascial release treatment (MR). The series of ten treatments were performed in both groups. The comparative assessment was based on physiotherapeutic examination, a surface electromyography (sEMG) of the anterior temporal and masseter muscles and the intensity of spontaneous masticatory muscle pain, assessed using the Visual Analogue Scale (VAS). We observed a significant decrease in the electrical activity of examined muscles and a significant drop in the intensity of spontaneous pain in the masticatory muscles both in group I and II. There were no significant differences between groups. Both therapeutic methods may be used as successful forms of adjunctive therapy in the prosthetic treatment of TMD. The trial was registered with an international clinical trials register.

AI snapshot

Written from the paper’s full text.

TL;DR

In 60 patients with painful temporomandibular disorders and increased masticatory muscle tension, ten sessions of either post-isometric relaxation (PIR) or myofascial release (MR) significantly reduced sEMG activity of the anterior temporalis and masseter muscles and VAS spontaneous pain, with no significant between-group differences. Both methods may be useful adjuncts to prosthetic TMD treatment.

Key findings

  • Both PIR and MR groups showed a significant decrease in electrical activity of the anterior temporal and masseter muscles on the right and left sides; Bonferroni post hoc tests found significant differences between measurement 1 and 2 and between measurement 1 and 3, but not between measurements 2 and 3.
  • Both groups showed a significant drop in the intensity of spontaneous masticatory muscle pain, with significantly higher VAS values at measurement 1 than at measurements 2 and 3.
  • There were no significant differences between groups in changes in electrical activity of the anterior temporal muscles or in changes in spontaneous pain intensity. A greater decrease in mean masseter electric potentials occurred in group II, but this was not statistically significant (right side p = 0.10; left side p = 0.11).
  • Physiotherapeutic examination showed improvement in both groups: mandibular abduction path/range, lateral mandibular movements, palpation pain in masticatory muscles and temporomandibular joints, and pain during passive mandibular movements.

Methods

  • Comparative study of 60 patients of both sexes, aged 19 to 40, referred to the Dental Prosthetic Clinic of the Institute of Dentistry, Jagiellonian University, Krakow, Poland, for prosthetic treatment of pain-related TMD with increased masticatory muscle tension. Patients were alternately assigned to group I (PIR; 30 patients: 22 women, 8 men; 28 ± 5.31 years) or group II (MR; 30 patients: 25 women, 5 men; 28 ± 5.10 years). Each patient received 10 treatment sessions over 10 consecutive days except Sundays.
  • Inclusion required RDC/TMD Axis I Group Ia with local or myofascial pain and increased masticatory muscle tension, absence of temporomandibular disc displacement, spontaneous masticatory muscle pain for at least one month before treatment, good general health, full dental arches with natural teeth or fixed prostheses, and written consent. Assessments occurred before treatment (measurement 1), after the last of 10 relaxation treatments (measurement 2), and on the 4th day after therapy end (measurement 3); all examinations and treatment sessions occurred before occlusal splint therapy.
  • Outcomes were physiotherapeutic examination using Manual Functional Analysis, surface electromyography (sEMG) of the anterior temporal and masseter muscles using a two-channel NeuroTrac MyoPlus 4 device with a 30-second mean measurement, and 10-point VAS for spontaneous masticatory muscle pain. Statistical analysis used Statistica 12.0 and IBM SPSS Statistics 26.0, with Shapiro–Wilk, Student’s t-test, Mann–Whitney U test, Chi-square, repeated-measures ANOVA with Bonferroni post hoc, Friedman and Wilcoxon tests, and α = 0.05 for two-sided tests. The trial was registered with clinicaltrials.gov (No NCT05091996).

Limitations

  • The authors state that a main limitation was the small sample size and recommend a multicentre study with a larger sample; they also note difficulty ensuring that electrode application points were exactly the same despite anthropometric points and photographic documentation, and that direct comparison of sEMG values with other studies may be limited by different technical parameters of measuring devices, such as sensitivity or frequency of measurement.
  • Evident from the text: no untreated, sham, or usual-care control group is described, so the study cannot isolate treatment effects from natural history or placebo effects; allocation was described as alternating rather than clearly randomized; and follow-up extended only to the 4th day after treatment end, so longer-term durability is not assessed.

Model-written summary. Check it against the paper before relying on it.

Integrity signals

Registry

Crossref · 10.3390/ijerph182412970

Cites

49 of 49 references verified0 citation errors · 0 not checkable

Statistics

Nothing to recompute.

Claims the paper makes

11 of 66 cited sources checked · 4 supported · 1 flagged · accuracy not yet measured

  • Premisecitation

    The use of manual therapy with simultaneous prosthetic treatment significantly accelerates restoration of proper functioning of the masticatory organ.

    “The use of these interventions with simultaneous prosthetic treatment significantly accelerates the restoration of proper functioning of the masticatory organ [1,13,14].”
    Quote in the paperSubstantial claim2 of 3 sources checked
    • cites [1] Okeson, J.P. (2013). Management of Temporomandibular Disorders and Occlusion, Elsevier/Mosby. [7th ed.].

      Couldn’t be matched to a paper in Crossref, so it can’t be checked.

    • cites [13] Silva, 2012, The interrelationship between dentistry and physiotherapy in the treatment of temporomandibular disorders, J. Contemp. Dent. Pr. source

      Materials and Methods describes patients treated with both occlusal splints and physiotherapy, including massage therapy. The Discussion reports pain relief after interdisciplinary treatment, but it does not show that manual therapy alongside prosthetic treatment significantly accelerated recovery or restored masticatory function; the measured outcome was pain. (LLM, conf=0.86)

      Experimental — accuracy not yet measured
    • cites [14] 2016, Psychoeducation training on stress management strategies as an addition to the therapy of temporomandibular joint dysfunction—preliminary studies, Arch. Psychiatry Psychother. source

      The Method (page unavailable) says prosthetic treatment was supplemented with physiotherapeutic procedures, but does not identify them as manual therapy. The Discussion says psychoeducation may improve functional disorders, while the Conclusions report improved emotional status; neither establishes that manual therapy significantly accelerates restoration of masticatory function. (LLM, conf=0.81)

      Experimental — accuracy not yet measured
  • Premisecitation

    Conservative interventions such as physiotherapy and manual therapy directly affect the muscular system to reduce excessive tension and minimize pain in the temporomandibular joints and chewing muscles.

    “These interventions directly affect the muscular system, in order to reduce its excessive tension, and thus minimize pain in the area of the temporomandibular joints, and in muscles involved in the chewing process [1,3,19,20,21,22,23,24,25,26].”
    Quote in the paperSubstantial claim4 of 10 sources checked
    • cites [1] Okeson, J.P. (2013). Management of Temporomandibular Disorders and Occlusion, Elsevier/Mosby. [7th ed.].

      Couldn’t be matched to a paper in Crossref, so it can’t be checked.

    • cites [3] Czerwińska-Niezabitowska, B., and Kulesa-Mrowiecka, M. (2016). Diagnostyka i Leczenie Dysfunkcji Czaszkowo-Żuchwowych w Ujęciu Holistycznym, Medycyna Praktyczna. (In Polish).

      Couldn’t be matched to a paper in Crossref, so it can’t be checked.

    • cites [19] Asquini, 2019, Predictors of pain reduction following manual therapy in patients with temporomandibular disorders: A protocol for a prospective observational study, BMJ Open source
    • cites [20] Bispo, 2019, Short-term effectiveness of conservative therapies in pain, quality of life, and sleep in patients with temporomandibular disorders: A randomized clinical trial, Cranio

      Couldn’t be matched to a paper in Crossref, so it can’t be checked.

    • cites [21] Brochado, 2018, Comparative effectiveness of photobiomodulation and manual therapy alone or combined in TMD patients: A randomized clinical trial, Braz. Oral Res. source
    • cites [22] Pessoa, 2018, Association of facial massage, dry needling, and laser therapy in Temporomandibular Disorder: Case report, Codas source
    • cites [23] Cleland, 2019, Effects of Cervico-Mandibular Manual Therapy in Patients with Temporomandibular Pain Disorders and Associated Somatic Tinnitus: A Randomized Clinical Trial, Pain Med.

      Couldn’t be matched to a paper in Crossref, so it can’t be checked.

    • cites [24] Reynolds, 2020, Effectiveness of Cervical Spine High-Velocity, Low-Amplitude Thrust Added to Behavioral Education, Soft Tissue Mobilization, and Exercise in Individuals with Temporomandibular Disorder (TMD) with Myalgia: A Randomized Clinical Trial, J. Orthop. Sports Phys. Ther. source
    • cites [25] Tuncer, 2013, Effectiveness of manual therapy and home physical therapy in patients with temporomandibular disorders: A randomized controlled trial, J. Bodyw. Mov. Ther. source
    • cites [26] Wieckiewicz, 2015, Reported concepts for the treatment modalities and pain management of temporomandibular disorders, J. Headache Pain source
  • Findingown data

    PIR and MR reduced pain in the masticatory muscles during palpation in both groups.

    “Reduction of the pain in the masticatory muscles during palpation in group I and group II.”
    Quote in the paperSubstantial claim
  • Findingown data

    There were no significant differences between PIR and MR groups in change in intensity of spontaneous pain in the masticatory muscles.

    “There were no significant differences in the change in the intensity of spontaneous pain in the masticatory muscles assessed during the first examination and follow-up examinations between patients in group I and patients in group II (Table 7).”
    Quote in the paperNot a substantial claim
  • Findingown data

    PIR and MR reduced pain in joints, periarticular structures or muscles during passive mandibular movements in both groups.

    “Reduction of pain in joints, periarticular structures or muscles during passive mandibular movements in group I and group II.”
    Quote in the paperSubstantial claim
  • May combine two claims. 15
  • Classified as probably not a substantial claim. 12
  • The quote only partly states this claim. 3
  • May combine two claims.

    Premisecitation

    PIR reduces muscle tension immediately after isometric contraction and minimizes pain sensations related to the muscular system.

    “The PIR method, based mainly on neurophysiological inhibitory (relaxing) mechanisms, allows for reduced muscle tension immediately after their isometric contraction and minimizes pain sensations related to the muscular system [15,27].”
    Quote in the paperSubstantial claim1 of 2 sources checked
    • cites [15] Chaitow, L. (2015). Techniki Energii Mięśniowej, Edra Urban & Partner. [3rd ed.].

      Couldn’t be matched to a paper in Crossref, so it can’t be checked.

    • cites [27] Ballantyne, 2003, The effect of muscle energy technique on hamstring extensibility: The mechanism of altered flexibility, J. Osteopat. Med. source

      The paper’s discussion of MET mechanisms (page unavailable) calls reflex relaxation after isometric contraction poorly supported and cites evidence disputing a neurological mechanism. Its Control Experimental section instead attributes the increased hamstring range of motion to greater tolerance of stretch: the same stretch caused less discomfort, but the study did not show reduced muscle tension or a general reduction in muscular pain. (LLM, conf=0.86)

      Checked by a reasoning model — may be wrong.

      Experimental — accuracy not yet measured
  • Probably not a substantial claim: may not pass S3 (load-bearing). May combine two claims.

    Premisecitation

    PIR and MR are highly effective in improving musculoskeletal function, increasing range of motion, alleviating pain, and decreasing muscle stiffness in trunk and limbs.

    “The reports indicate that PIR and MR are highly effective in improving the functioning of the musculoskeletal system, increasing the range of motion in the joints, alleviating pain and decreasing muscle stiffness.”
    Quote in the paperNot a substantial claim2 of 9 sources checked
    • cites [27] Ballantyne, 2003, The effect of muscle energy technique on hamstring extensibility: The mechanism of altered flexibility, J. Osteopat. Med. source

      The Results (page unavailable) report increased knee range of motion after muscle energy technique in the hamstrings of asymptomatic subjects. The Conclusion (page unavailable) attributes this to greater stretch tolerance, not a biomechanical change. The paper does not establish that both PIR and MR are highly effective, or that they improve general musculoskeletal function, relieve pain, or decrease muscle stiffness in the trunk and limbs. (LLM, conf=0.89)

      Experimental — accuracy not yet measured
    • cites [32] Smith, 2008, A comparison of two muscle energy techniques for increasing flexibility of the hamstring muscle group, J. Bodyw. Mov. Ther. source
    • cites [33] Fryer, 2004, The influence of contraction duration in muscle energy technique applied to the atlanto-axial joint, J. Osteopat. Med. source
    • cites [34] Lenehan, 2003, The effect of muscle energy technique on gross trunk range of motion, J. Osteopat. Med. source

      The Conclusion reports that muscle energy technique (MET) increased restricted trunk rotation in asymptomatic subjects. The study does not establish that PIR and MR are highly effective across the trunk and limbs, or that they alleviate pain or decrease muscle stiffness; the Conclusion calls for future research using pain and disability measures. Page numbers are unavailable in our copy. (LLM, conf=0.88)

      Experimental — accuracy not yet measured
    • cites [35] Ptaszkowski, 2014, Ocena efektów krótkoterminowych tech-niki energii mięśniowej—poizometrycznej relaksacji na aktywność bioelektryczną i elastyczność mięśnia prostego uda—pi-lotażowe badanie randomizowane, Acta Balneol.

      Couldn’t be matched to a paper in Crossref, so it can’t be checked.

    • cites [36] Ajimsha, 2012, Effectiveness of Myofascial Release in the Management of Lateral Epicondylitis in Computer Professionals, Arch. Phys. Med. Rehabil. source
    • cites [37] Ajimsha, 2014, Effectiveness of myofascial release in the management of plantar heel pain: A randomized controlled trial, Foot source
    • cites [38] Ichikawa, 2015, Comparative analysis of ultrasound changes in the vastus lateralis muscle following myofascial release and thermotherapy: A pilot study, J. Bodyw. Mov. Ther. source
    • cites [39] 2011, Effects of myofascial release techniques on pain, physical function, and postural stability in patients with fibromyalgia: A randomized controlled trial, Clin. Rehabil. source
  • May combine two claims.

    Premisecitation

    Reports on trunk and limbs soft-tissue therapy indicate a significant effect of PIR on minimization of pain and increasing range of motion in joints.

    “These reports indicate a significant effect of PIR on the minimization of pain and increasing the range of motion in the joints [16,27,32,33,34], accompanied by a decrease in muscle electrical activity [35].”
    Quote in the paperSubstantial claim2 of 6 sources checked
    • cites [16] Blanco, 2006, Changes in active mouth opening following a single treatment of latent myofascial trigger points in the masseter muscle involving post-isometric relaxation or strain/counterstrain, J. Bodyw. Mov. Ther. source
    • cites [27] Ballantyne, 2003, The effect of muscle energy technique on hamstring extensibility: The mechanism of altered flexibility, J. Osteopat. Med. source

      The Abstract and Results report a significant increase in knee range of motion after muscle energy technique applied to the hamstrings. The participants were asymptomatic, however, and the paper does not report pain reduction or establish an effect across trunk and limb joints. (LLM, conf=0.88)

      Experimental — accuracy not yet measured
    • cites [32] Smith, 2008, A comparison of two muscle energy techniques for increasing flexibility of the hamstring muscle group, J. Bodyw. Mov. Ther. source
    • cites [33] Fryer, 2004, The influence of contraction duration in muscle energy technique applied to the atlanto-axial joint, J. Osteopat. Med. source
    • cites [34] Lenehan, 2003, The effect of muscle energy technique on gross trunk range of motion, J. Osteopat. Med. source

      The Abstract and Conclusion (page numbers unavailable) report a significant increase in restricted trunk rotation after muscle energy technique in asymptomatic volunteers. The paper did not test pain reduction or limb-joint motion, and it does not explicitly identify the intervention as PIR. The Conclusion calls for future research using pain indicators in symptomatic subjects. (LLM, conf=0.88)

      Experimental — accuracy not yet measured
    • cites [35] Ptaszkowski, 2014, Ocena efektów krótkoterminowych tech-niki energii mięśniowej—poizometrycznej relaksacji na aktywność bioelektryczną i elastyczność mięśnia prostego uda—pi-lotażowe badanie randomizowane, Acta Balneol.

      Couldn’t be matched to a paper in Crossref, so it can’t be checked.

  • The quote only partly states this claim.

    Findingown data

    PIR and MR reduced pain in the temporomandibular joints during palpation in both groups.

    “Reduction of pain in the temporomandibular joints during palpation in group I and group II.”
    Quote in the paperSubstantial claim
  • The quote only partly states this claim.

    Findingown data

    PIR and MR improved the range of lateral movements of the mandible in both groups.

    “Improvement of the range of lateral movements of the mandible in group I and group II.”
    Quote in the paperSubstantial claim
  • May combine two claims.

    Findingown data

    PIR and MR both significantly decreased electrical activity of the anterior temporal and masseter muscles (right and left) from baseline to post-treatment and follow-up.

    “We observed a significant decrease in the electrical activity of examined muscles and a significant drop in the intensity of spontaneous pain in the masticatory muscles both in group I and II.”
    • Also stated in: § 3.2. The Results of Electromyographic Examination of the Masticatory Muscles Obtained in Group I and Group II · plain
      “A significant decrease in electrical activity of both muscles was observed, on the right and left, in both groups.”
    • Also stated in: § 3.2. The Results of Electromyographic Examination of the Masticatory Muscles Obtained in Group I and Group II · boosted
      “In both groups, the Bonferroni post hoc tests demonstrated a statistically significant difference in the mean values of the studied parameter between the 1st and 2nd measurement, and between the 1st and 3rd measurement for both the anterior part of the temporal muscles and the masseter muscles, on the right and left sides.”
    Quote in the paperSubstantial claim
  • May combine two claims.

    Findingown data

    PIR and MR both significantly reduced the intensity of spontaneous pain in the masticatory muscles from baseline to post-treatment and follow-up.

    “We observed a significant decrease in the electrical activity of examined muscles and a significant drop in the intensity of spontaneous pain in the masticatory muscles both in group I and II.”
    • Also stated in: § 3.3. The Results of the Evaluation of the Intensity of Pain in the Masticatory Muscles in Group I and Group II · plain
      “In both group I and group II, significantly higher values of the intensity of spontaneous pain in the masticatory muscles were declared by the participants of the study for measurement 1, compared to measurement 2 and measurement 3 (Table 6).”
    Quote in the paperSubstantial claim
    • Rests on an assumption: The 10-point VAS is a valid measure of spontaneous pain intensity in the masticatory muscles.
  • Classified as probably not a substantial claim.

    Study design and conductcitation

    The electrical activity of the anterior temporal and masseter muscles was assessed in accordance with the assumptions of surface electromyography (sEMG).

    “The electrical activity of the anterior part of the temporal and masseter muscles was assessed in accordance with the assumptions of surface electromyography (sEMG) [42,43,44].”
    Quote in the paperSubstantial claim0 of 3 sources checked
    • cites [42] Sobota, 2012, Elektromiografia i jej zastosowanie w zaburzeniach aparatu żucia, Twój Prz. Stomatol.

      Couldn’t be matched to a paper in Crossref, so it can’t be checked.

    • cites [43] Berni, 2015, Accuracy of the surface electromyography RMS processing for the diagnosis of myogenous temporomandibular disorder, J. Electromyogr. Kinesiol. source
    • cites [44] Peter, K. (2007). ABC EMG: Praktyczne Wprowadzenie do Elektromiografii Kinezjologicznej, Technomex. (In Polish).

      Couldn’t be matched to a paper in Crossref, so it can’t be checked.

  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Study design and conductreasoning

    sEMG electrode positions were standardized using anthropometric points and photographic documentation to ensure repeatability.

    “In order to ensure the repeatability of the electrode positions, the relationships of selected anthropometric points were used and a photographic documentation of the sEMG test was created each time.”
    Quote in the paperNot a substantial claim
  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Study design and conductreasoning

    The sEMG test was conducted in the rest position of the mandible to standardize the starting position.

    “The sEMG test was conducted in the rest position of the mandible in order to standardize the starting position for the measurement.”
    Quote in the paperNot a substantial claim
  • May combine two claims.

    Interpretationown data

    Both PIR and MR may be used as successful forms of adjunctive therapy in the prosthetic treatment of TMD.

    “Both therapeutic methods may be used as successful forms of adjunctive therapy in the prosthetic treatment of TMD.”
    Quote in the paperSubstantial claim
    • Rests on an assumption: The observed improvements in muscle activity and pain are attributable to the PIR and MR treatments rather than to natural course, placebo, or other factors.
  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Study design and conductcitation

    The physiotherapeutic examination was performed in compliance with the guidelines of the Manual Functional Analysis (MFA) according to Bumann.

    “The physiotherapeutic examination was performed in compliance with the guidelines of the Manual Functional Analysis (MFA) of the masticatory apparatus according to Bumann [3,41].”
    Quote in the paperNot a substantial claim0 of 2 sources checked
    • cites [3] Czerwińska-Niezabitowska, B., and Kulesa-Mrowiecka, M. (2016). Diagnostyka i Leczenie Dysfunkcji Czaszkowo-Żuchwowych w Ujęciu Holistycznym, Medycyna Praktyczna. (In Polish).

      Couldn’t be matched to a paper in Crossref, so it can’t be checked.

    • cites [41] Bumann, A., and Lotzmann, U. (2002). TMJ Disorders and Orofacial Pain The Role of Dentistry in a Multidisciplinary Diagnostic Approach. Color Atlas of Dental Medicine, Thieme. source
  • Classified as probably not a substantial claim.

    Study design and conductnone given

    All parts of the clinical examination were performed by the same experienced physiotherapist three times.

    “All parts of the clinical examination were performed by the same experienced physiotherapist three times, firstly immediately before commencing treatment (measurement 1), secondly after the last of 10 relaxation treatments (measurement 2), and lastly on the 4th day after the end of therapy (measurement 3).”
    Quote in the paperSubstantial claim
  • May combine two claims.

    Premisecitation

    MR removes restrictions within the myofascial system, thus reducing pain and muscle tension.

    “The MR method, based on the so-called phenomenon of relaxation, removes restrictions within the myofascial system, thus reducing pain and muscles tension [28,29,30,31].”
    Quote in the paperSubstantial claim0 of 4 sources checked
    • cites [28] Chaitow, L., and Delany, J. (2008). Clinical Application of Neuromuscular Techniques, Volume 1: The Upper Body, Churchill Livingstone Elsevier. [2nd ed.].

      Couldn’t be matched to a paper in Crossref, so it can’t be checked.

    • cites [29] Manheim, C.J. (2011). Rozluźnianie Mięśniowo-Powięziowe, WSEiT. (In Polish).

      Couldn’t be matched to a paper in Crossref, so it can’t be checked.

    • cites [30] Myers, T., and James, E. (2012). Rozluźnianie Powięziowe Dla Równowagi Strukturalnej, WSEiT. (In Polish).

      Couldn’t be matched to a paper in Crossref, so it can’t be checked.

    • cites [31] Cantu, R.I., and Grodin, A.J. (2001). Myofascial Manipulation: Theory and Clinical Application, Aspen Pub. [2nd ed.].

      Couldn’t be matched to a paper in Crossref, so it can’t be checked.

  • May combine two claims.

    Study design and conductreasoning

    All clinical examinations and treatment sessions occurred prior to occlusal splint therapy, so PIR and MR were evaluated without impact of the primary treatment.

    “All clinical examinations and treatment sessions occurred prior to the introduction of occlusal splint therapy, which was used as a primary treatment of TMD. Thus, both PIR and MR methods (used as supportive therapies) were evaluated individually, with no impact of the primary treatment on the patients’ condition.”
    Quote in the paperSubstantial claim
  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Study design and conductnone given

    The trial was registered with clinicaltrials.gov (No NCT05091996).

    “The trial was registered with clinicaltrials.gov (No NCT05091996 accessed on 25 October 2021).”
    Quote in the paperNot a substantial claim
  • May combine two claims.

    Premisecitation

    MR is effective in reducing pain and improving the range of movement of the mandible in TMD.

    “On the other hand, the results of studies assessing the clinical effects of MR in the treatment of such disorder show its effectiveness in reducing pain and improving the range of movement of the mandible [17].”
    Quote in the paperSubstantial claim0 of 1 sources checked
    • cites [17] Girao, 2009, Changes in masseter muscle trigger points following strain-counterstrain or neuro-muscular technique, J. Bodyw. Mov. Ther. source
  • May combine two claims.

    Study design and conductown data

    Before therapy, there was no difference between the PIR and MR groups in sex distribution, age, electromyographic tension of the anterior temporal and masseter muscles, and intensity of spontaneous pain in the masticatory muscles.

    “Before the therapy there was found to be no difference between the groups in the distribution of sex, age, electromyographic tension of the anterior part of the temporal and masseter muscles, and the intensity of spontaneous pain in the masticatory muscles (Table 1).”
    Quote in the paperSubstantial claim
  • Classified as probably not a substantial claim.

    Interpretationcitation

    All of the aforementioned findings from the cited reports are consistent with the results of the present study.

    “In the reports that have shown a direct relationship between the level of perceived pain and muscle electrical activity [56,57], all of the aforementioned findings are consistent with the results of the present study.”
    Quote in the paperSubstantial claim
  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Study design and conductreasoning

    Although efforts were made to ensure repeatability of electrode locations, it is difficult to say with certainty that the electrode application points were exactly the same.

    “Although strenuous efforts were made and anthropometric points were used as well as photographic documentation of the sEMG study to ensure the repeatability of the electrode locations, it is difficult to say with certainty that the electrode application points were exactly the same.”
    Quote in the paperNot a substantial claim
  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Premisecitation

    Ibanez-Garcia et al. compared the therapeutic effects of the neuromuscular technique and the positional release method in patients with myofascial trigger points in the masseter muscles.

    “Ibanez-Garcia et al. [17] attempted to compare the therapeutic effects of the neuromuscular technique and the positional release method among patients diagnosed with MTrPs located within the masseter muscles.”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites [17] Girao, 2009, Changes in masseter muscle trigger points following strain-counterstrain or neuro-muscular technique, J. Bodyw. Mov. Ther. source
  • May combine two claims.

    Interpretationown data

    Both PIR and MR methods reduce pain and tension in the masticatory muscles.

    “Both methods reduce pain and tension in the masticatory muscles.”
    Quote in the paperSubstantial claim
  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Premisecitation

    Cuccia et al. and Raiadurai assessed the clinical effectiveness of treatment protocols consisting of several therapeutic techniques.

    “Both authors assessed the clinical effectiveness of treatment protocols consisting of several therapeutic techniques.”
    Quote in the paperNot a substantial claim
  • May combine two claims.

    Interpretationcitation

    The results of this research are confirmed by current scientific reports and indicate positive effects of using both PIR and MR methods in supportive treatment of TMD.

    “Summarizing the above considerations, it should be noted that the results of this research are confirmed by current scientific reports and indicate the positive effects of using both PIR and MR methods in the supportive treatment of TMD.”
    Quote in the paperSubstantial claim
  • May combine two claims.

    Premisecitation

    In Ibanez-Garcia et al.'s study, both methods were highly effective in reducing the pressure pain threshold and increasing the maximum pain-free mandibular active range of motion.

    “Nevertheless, both methods were found to be highly effective in reducing the pressure pain threshold (PPT) and increasing the maximum pain-free mandibular active range of motion, while a moderate effect on reducing the intensity of local pain induced by palpation was observed.”
    Quote in the paperSubstantial claim0 of 1 sources checked
    • cites [17] Girao, 2009, Changes in masseter muscle trigger points following strain-counterstrain or neuro-muscular technique, J. Bodyw. Mov. Ther. source
  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Premisecitation

    Cuccia et al. and Raiadurai investigated the use of PIR and MR methods in TMD patients.

    “Additionally, Cuccia et al. [45] and Raiadurai [46] investigated the use of PIR [45,46] and MR methods [45] in TMD patients.”
    Quote in the paperNot a substantial claim0 of 2 sources checked
    • cites [45] Cuccia, 2010, Osteopathic manual therapy versus conventional conservative therapy in the treatment of temporomandibular disorders: A randomized controlled trial, J. Bodyw. Mov. Ther. source
    • cites [46] Rajadurai, 2010, The Effect of Muscle Energy Technique on Temporomandibular Joint Dysfunction: A Randomized Clinical Trial, Asian J. Sci. Res. source
  • May combine two claims. The quote only partly states this claim.

    Interpretationcitation

    The finding of greater improvement after MR than PIR is reflected in the results of this study and indicates possible greater efficiency of myofascial relaxation in improving functioning of the masticatory system.

    “This finding, reflected also in the results of this study indicates the possible greater efficiency of myofascial relaxation in improving the functioning of the masticatory system.”
    Quote in the paperSubstantial claim
  • May combine two claims.

    Interpretationcitation

    The cited publications demonstrated beneficial effects of both PIR and MR methods in reducing pain sensations and improving masticatory organ function, similar to the present study.

    “Similar to the present study, the cited publications demonstrated the beneficial effects of both PIR and MR methods in reducing pain sensations and improving masticatory organ function.”
    Quote in the paperSubstantial claim
28 of 28
  • The paper relies on this without support.

    The 10-point VAS is a valid measure of spontaneous pain intensity in the masticatory muscles.

    “The intensity of spontaneous pain in the masticatory muscles was assessed based on a 10-point VAS.”
  • The paper relies on this without support.

    The observed improvements in muscle activity and pain are attributable to the PIR and MR treatments rather than to natural course, placebo, or other factors.

    “Both therapeutic methods may be used as successful forms of adjunctive therapy in the prosthetic treatment of TMD.”
  • The paper relies on this without support.

    Comparative studies evaluating the effects of post-isometric muscle relaxation and myofascial release in patients treated for pain-related temporomandibular disorder with increased muscle tension have not been carried out as of yet.

    “To the authors’ knowledge, comparative studies evaluating the effects of the post-isometric muscle relaxation and myofascial release in patients treated for pain-related TMD, accompanied by increased muscle tension, have not been carried out as of yet.”
  • The paper relies on this without support.

    There are few scientific reports in the available literature assessing each of these methods separately in the context of the masticatory muscles.

    “There are few scientific reports in the available literature assessing each of these methods separately in the context of the masticatory muscles.”
  • The paper relies on this without support.

    There are limited data on assessing manual therapy interventions with the use of surface electromyography in this field of medicine.

    “It is also noticeable that there are limited data on assessing manual therapy interventions with the use of sEMG in this field of medicine.”
5 of 5

Self-check

Percentages, sums and reported differences re-computed from the paper’s own numbers.

Each contradiction between two passages listed here was confirmed by an independent check.

  • Statistical analysis attributed to two different software packages

    Minor

    The methods say the statistical analysis used Statistica 12.0, but later say all statistical analyses were performed using IBM SPSS Statistics 26. The text does not explain whether the analyses were duplicated or divided between the programs.

1 of 1

Cites

Flagged first, then by citations

Research works printed but not linked: 3

  1. Okeson, J.P. (2013). Management of Temporomandibular Disorders and Occlusion, Elsevier/Mosby. [7th ed.].
  2. Ptaszkowski, 2014, Ocena efektów krótkoterminowych tech-niki energii mięśniowej—poizometrycznej relaksacji na aktywność bioelektryczną i elastyczność mięśnia prostego uda—pi-lotażowe badanie randomizowane, Acta Balneol., 2, 88
  3. Sobota, 2012, Elektromiografia i jej zastosowanie w zaburzeniach aparatu żucia, Twój Prz. Stomatol., 6, 57

Cited by

Sorted by citations

Authors
Urbański, P., Trybulec, B., & Pihut, M.
Affiliations
Jagiellonian University (PL)
Corresponding author
Urbański, Piotr
Venue
International Journal of Environmental Research and Public Health
Publisher
MDPI AG
Published
2021-12-08
Volume
18
Issue
24
Pages
12970
ISSN
1660-4601 (ISSN-L)
OpenAlex
W4200390732
Cited by
73
References
48
Citations by year
2026: 10 · 2025: 20 · 2024: 19 · 2023: 20 · 2022: 4
FWCI
10.66
Type
journal article
Language
en
Open access
Locations
  • International Journal of Environmental Research and Public Health (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • Jagiellonian University Repository (Jagiellonian University) (submittedVersion, cc-by-nc-nd)
  • PubMed Central (submittedVersion, cc-by)
  • RePEc: Research Papers in Economics (submittedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
Topics
  • Health Sciences › Health Professions › Complementary and Manual Therapy › Temporomandibular Joint Disorders
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Myofascial pain diagnosis and treatment
  • Physical Sciences › Engineering › Biomedical Engineering › Muscle activation and electromyography studies
Keywords
temporomandibular disorders, post-isometric relaxation, myofascial release, masseter muscle, anterior temporalis muscle, surface electromyography, masticatory muscle pain, prosthetic treatment, adjunctive therapy, manual therapy
MeSH terms
Myofascial Release Therapy, Electromyography, Humans, Masseter Muscle, Masticatory Muscles, Temporal Muscle, Temporomandibular Joint Disorders

About these checks

Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.

Claims read by deepseek-v4.1-flash under definition version 3 (extract-v3) on 2026-10-12.

Classified by jev-1.13-20260917 (gold-guideline-v0.2) on 2026-10-12.

Cited sources are checked by gpt-6-sol.

Statistics and arithmetic are recomputed, not judged.

Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.

What counts as a claim ›How we measure confidence ›How we check this ›

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