SUMMARY
INTRODUCTION: The aim of the study was to compare the effects of dry needling and kinesio taping on pain intensity, mandibular range of motion, sleep quality, and depression levels in patients diagnosed with myogenous temporomandibular dysfunction (TMD).
METHODS: Ninety patients with TMD were included in this two-center randomized controlled trial. Participants were randomly assigned to three groups: Group A (dry needling), Group B (kinesio taping), and Group C (control—conservative recommendations). Interventions were applied over 6 weeks. Primary outcome measures included the visual analog scale, Beck Depression Inventory, Pittsburgh Sleep Quality Index, and mandibular mobility assessment.
RESULTS: Both intervention groups demonstrated significant improvements in pain reduction, increased mandibular range of motion, and improved sleep quality (p<0.05). The dry needling group showed superior outcomes compared to the other groups. While both the dry needling and kinesio taping groups showed within-group improvements in depression scores, between-group differences were not statistically significant (p=0.464), and lateral mandibular movements did not differ significantly among groups.
CONCLUSION: Dry needling and kinesio taping are effective, safe, and clinically feasible interventions for the management of TMD. Dry needling, in particular, appears more effective in reducing pain and improving function. These findings highlight the importance of incorporating conservative physical therapy approaches within multidisciplinary TMD treatment protocols.
KEYWORDS:
Temporomandibular joint disorders; Myofascial pain; Dry needling; Athletic Tape; Pain; Sleep quality
INTRODUCTION
Temporomandibular dysfunctions (TMDs) represent a group of complex conditions characterized by dysfunction of the temporomandibular joint (TMJ), masticatory muscles, and surrounding supportive structures, with a multifactorial etiology1. TMD is recognized as one of the most common causes of orofacial pain, often presenting with muscle tenderness, joint sounds, and limitations in mandibular motion2. While the etiology of TMD remains unclear, several contributing factors have been proposed, including parafunctional habits, trauma, occlusal abnormalities, emotional stress, and postural disorders1,3.
Epidemiological data reveal significant variability in TMD prevalence across populations, likely influenced by cultural, geographic, and methodological factors3,4. Notably, TMD symptoms are more frequently reported in women, potentially due to hormonal influences, pain sensitivity, and psychosocial variables5,6.
TMD is associated with chronic pain, sleep disturbances, and psychological distress, all of which can significantly impair quality of life. Therefore, management strategies should aim not only to alleviate symptoms but also to target underlying pathophysiological mechanisms7,8. Conservative treatment options are typically the first-line approach and may include physical therapy, therapeutic exercise, behavioral interventions, and complementary modalities8,9.
Kinesio taping (KT) is a non-invasive intervention that has gained popularity in TMD treatment. It provides proprioceptive feedback, enhances local circulation, and modulates muscle activity through the application of elastic tapes on the skin10. In contrast, dry needling (DN) is an invasive technique that targets myofascial trigger points to reduce pain and relieve muscle spasm. Clinical and experimental studies suggest that DN enhances blood flow, improves oxygenation, and suppresses pain mediators11,12.
Accordingly, this study aims to evaluate and compare the effects of DN and KT on pain, depression, sleep quality, and mandibular function in individuals with myogenous TMD. The study hypothesizes that both physical therapy approaches will offer superior clinical outcomes compared to traditional conservative recommendations.
METHODS
Study design and ethical approval
This prospective, two-center, randomized controlled trial was conducted between March 1, 2025, and June 1, 2025, at the Faculty of Dentistry and the Department of Otorhinolaryngology, Faculty of Medicine, Karamanoğlu Mehmetbey University University. Ethical approval was obtained from the university's Clinical Research Ethics Committee on [15/01/2025], under the decision number [15-2025/09]. Informed consent was obtained from all participants, who were also informed of their right to withdraw from the study at any stage.
Randomization was performed using a sealed envelope method, with group allocations carried out by an independent researcher unaware of participant identities. The study protocol adhered to the CONSORT 2010 guidelines.
Participants
The study included volunteer individuals aged 18–60 who presented with symptoms such as jaw pain, earache, and/or joint sounds and were diagnosed with myogenous TMD. The diagnosis was based on the diagnostic criteria for temporomandibular dysfunctions (DC/TMD) developed by Dworkin and LeResche13.
Exclusion criteria included intra-articular TMD, skeletal deformities, malignancies, infectious diseases, systemic rheumatologic or hematologic disorders, fibromyalgia, psychiatric diagnoses, major head and neck anatomical pathologies, regular use of analgesic medications, and individuals unable to cooperate. All evaluations and interventions adhered to the principles of the Declaration of Helsinki and were conducted by different blinded assessors.
Sample size calculation
The required sample size was calculated using G*Power 3.1 software (Heinrich Heine University, Düsseldorf, Germany). Based on an alpha level of 0.05, an effect size of 0.40, and 80% power (1–β), a minimum of 66 participants was needed for analysis of variance (ANOVA) across three groups. To enhance statistical power and account for potential dropouts, 30 participants were included in each group. The final sample size was deemed sufficient to meet the assumptions of parametric testing14.
Outcome measures
Sociodemographic assessment
Demographic data, including age, sex, educational background, marital status, and monthly income, were collected to assess baseline comparability across groups14.
Pain assessment
Pain levels were measured using the visual analog scale (VAS), a 10 cm horizontal line where 0 indicates no pain and 10 represents the most intense pain imaginable. Participants were instructed to mark their pain levels both at rest and during functional activities14.
Depression assessment
Psychological status was evaluated using the Beck Depression Inventory (BDI), a validated 21-item self-report scale. Each item is rated on a 0–3 scale, with total scores ranging from 0 to 63. Scores of 0–13 indicate no depression, 14–24 suggest mild-to-moderate depression, and ≥25 indicate severe depression15.
Sleep quality
The Pittsburgh Sleep Quality Index (PSQI) was used to assess subjective sleep quality over the past month. It consists of 19 items across multiple domains, yielding a total score ranging from 0 to 21. A total score of ≥5 indicates clinically significant poor sleep quality. PSQI demonstrates a diagnostic sensitivity of 89.6% and specificity of 86.5%16. All assessments were administered by the same trained investigator according to a standardized protocol.
Interventions
Dry needling group
Dry needling was performed using sterile stainless steel needles measuring 13 mm in length and 0.25 mm in diameter, with a plastic cylindrical guide tube. Prior to needle insertion, the skin was disinfected with an antiseptic solution. The needles were inserted into the masseter and temporalis muscles, targeting trigger points located beneath the zygomatic arch and approximately 2.5 cm anterior to the tragus along the mandibular angle. Each session involved a clockwise rotation of the needle for 10 min, followed by a counterclockwise rotation for an additional 10 min. Sessions lasted 20 min and were applied three times per week for a total of 6 weeks17.
Kinesio taping group
KT was performed using Y-shaped, cotton-based, and latex-free elastic tape applied to the masseter muscle. The tape was worn for 4 days and re-applied weekly over a 6-week period. This method aimed to provide proprioceptive input, support soft tissues, and modulate muscle activity10.
Control group
Participants in the control group received general conservative recommendations, including the consumption of soft foods, use of analgesics when necessary, bilateral mastication, and application of superficial heat. Participants were asked to document their use of analgesics. Heat application was advised to promote local circulation and reduce muscle spasm18. All participants were instructed in a standardized home exercise program14.
Statistical analyses
All statistical analyses were performed using SPSS version 25.0 (IBM Corp., Released 2017, IBM SPSS Statistics for Windows, Version 25.0, Armonk, NY: IBM Corp.). The normality of continuous variables was assessed using the Kolmogorov-Smirnov and Shapiro-Wilk tests. Descriptive statistics were presented as mean±standard deviation (SD) for continuous variables and as frequencies and percentages for categorical variables.
For baseline comparisons among the three groups, one-way ANOVA was used for continuous variables, and the chi-square test was applied for categorical variables. To evaluate within-group and between-group differences before and after the interventions, a two-way repeated-measures ANOVA was conducted. Where appropriate, Bonferroni post hoc tests were used for pairwise comparisons. The significance level was set at p<0.05 for all analyses.
RESULTS
There were no statistically significant differences among the three groups in terms of demographic and clinical characteristics (p>0.05; Table 1).
Depression scores showed no group differences at baseline (p=0.551) or after treatment (p=0.960). However, significant within-group improvements were noted in the DN (p=0.011) and KT (p=0.001) groups, but not in controls (p=0.124). Between-group comparisons showed no significant change (p=0.464) (Table 2).
Mouth opening was initially similar (p=0.077), but differed significantly post-treatment (p=0.012). Only the DN group improved significantly (p<0.001); the KT and control groups showed no change (p=0.919; p=0.807). Change scores showed a significant intervention effect (p<0.001) (Table 2).
Maximum mouth opening followed a similar pattern: baseline similarity (p=0.076), significant post-treatment difference (p<0.001), and improvement only in the DN group (p<0.001) (Table 2).
Right and left lateral jaw movements were comparable at baseline (p>0.9). Both DN and KT groups improved significantly (p<0.01), but between-group differences were not significant (right: p=0.088; left: p=0.902) (Table 2).
Protrusion was similar at baseline (p=0.965), but differed post-intervention (p=0.010). DN and KT groups improved (p<0.001); the control group did not (p=0.258). Between-group differences were significant (p=0.049) (Table 2).
Sleep quality differed at baseline (p=0.004) and remained different post-intervention (p=0.010). DN (p=0.008) and KT (p=0.025) groups improved, while the control group did not (p>0.999). Change scores showed significant group differences (p=0.035) (Table 2).
DISCUSSION
The findings of this study demonstrate that both DN and KT interventions produced significant improvements in pain, sleep quality, and mandibular function among patients with TMD. Notably, the DN group exhibited greater reductions in both VAS and PSQI scores, suggesting superior efficacy in symptom management.
Consistent with our results, Ozmen et al. reported that KT was effective in reducing pain and enhancing functional outcomes in TMD patients in both the medium and long term19. This aligns with the observed improvements in mandibular range of motion in our KT group.
The greater therapeutic effect of DN may be attributed to its mechanisms, including trigger point deactivation, increased local circulation, and reduced muscle spasm14. Several studies have also confirmed the efficacy of DN, especially when applied to the masseter and temporalis muscles, in alleviating myofascial pain20. In addition, while improvements in lateral jaw movements were observed within the DN and KT groups, between-group differences were not statistically significant. Thus, these changes should be interpreted cautiously and not overstated in terms of functional superiority.
Interestingly, slight increases in depression scores were observed in both intervention groups. This finding suggests that short-term physical treatments may have limited effects on psychological parameters. Recent evidence suggests that TMD-related pain is closely linked to emotional distress, especially in the post-pandemic period21. In alignment with this biopsychosocial framework, our study observed that both dry needling and KT interventions led to improvements in sleep quality and depressive symptoms, although between-group differences were not statistically significant. In the literature, depression is considered both a cause and a consequence of TMD, underscoring the importance of long-term psychological evaluation22.
The improvement in sleep quality, as reflected in PSQI scores, is likely related to the reduction in TMD-related pain. Previous studies have demonstrated the positive effects of relaxation techniques such as facial yoga on sleep quality14.
In addition to statistical significance, several outcome measures demonstrated clinically meaningful effect sizes. For example, dry needling (DN) showed a large effect on pain intensity (Cohen's d=2.84) and maximum mouth opening (Cohen's d=1.56), suggesting strong therapeutic benefits. Kinesiotaping (KT) also exhibited moderate effects on depression (d=0.64) and jaw mobility outcomes, although generally lower than DN. These findings support the clinical utility of DN, particularly for improving pain and functional parameters, even in the absence of significant between-group differences for some variables.
Although the research diagnostic criteria for temporomandibular dysfunctions (RDC/TMD) are widely used in clinical and research settings, their diagnostic agreement with imaging modalities such as magnetic resonance imaging (MRI) remains limited. In a previous study, Galhardo et al. reported a diagnostic discrepancy rate of up to 32% between RDC/TMD assessments and MRI findings, particularly in detecting disc displacement and osteoarthritic changes23. These findings highlight the need for caution when relying solely on clinical diagnostic tools and emphasize the importance of integrating objective imaging techniques when appropriate. Our study adopted the RDC/TMD criteria due to their practical applicability in clinical settings; however, we acknowledge that this may limit the precision of TMD subgroup classification in the absence of imaging validation.
This study's strengths include its randomized controlled design, the use of a three-arm comparison, and the implementation of interventions by experienced professionals. This study has several important limitations that should be acknowledged. First, the follow-up period was limited to 6 weeks, which may not be sufficient to evaluate the long-term sustainability of treatment effects—particularly for psychological outcomes such as depression and sleep quality. Second, while the sample size was calculated based on expected differences in pain scores, no separate power analysis was conducted for secondary outcomes such as sleep and depression, increasing the risk of Type II error in these domains. Third, the control group received general conservative recommendations (e.g., dietary advice, superficial heat application) but lacked a placebo-equivalent intervention, such as sham taping or sham needling. This design limits the ability to isolate the specific therapeutic effects of DN and KT from non-specific placebo responses. Fourth, all participants were recruited from a single geographic region in Turkey, which may limit the generalizability of the findings to other populations with differing cultural or healthcare contexts. Fifth, the study did not include mechanistic measurements (e.g., electromyography [EMG], biomarkers) to verify the hypothesized physiological effects of DN, such as trigger point deactivation or improved circulation. Finally, the study did not include direct comparisons with gold-standard therapies for TMD, such as occlusal splints or cognitive behavioral therapy (CBT), nor did it address the cost-effectiveness of the interventions. Future research should include longer follow-up, sham-controlled designs, physiological validation measures, and economic evaluations to better understand the clinical and practical value of DN and KT.
Although DN and KT demonstrated clinical benefits in this study, the interventions were not compared with standard treatments such as occlusal splints or CBT, which limits the scope of comparative effectiveness. Additionally, while DN requires specialized clinical training and sterile equipment, KT is a non-invasive, low-cost intervention that can be administered with minimal resources. Future studies should explore not only clinical efficacy but also economic evaluations and head-to-head comparisons with other conservative and gold-standard therapies.
Overall, our findings support the clinical use of DN and KT as effective conservative interventions in the multidisciplinary management of TMD. These techniques, when integrated into individualized treatment protocols, may enhance symptom relief and patient satisfaction. Further research with larger sample sizes and extended follow-up durations is needed to assess the long-term sustainability, mechanisms of action, and cost-effectiveness of these interventions.
CONCLUSION
Both DN and KT were effective in reducing pain, enhancing jaw mobility, and improving sleep in individuals with TMD. DN showed slightly greater clinical benefits in pain relief and function; however, these findings should be interpreted with caution, as not all between-group comparisons reached statistical significance.
Although improvements in depression and lateral movements were observed within intervention groups, these effects did not differ significantly between groups and therefore should not be interpreted as evidence of superiority.
The slight changes in depression scores underline the importance of addressing psychosocial factors through holistic care. These results support the role of physiotherapy-based conservative methods in multidisciplinary TMD management.
Incorporating DN and KT into personalized treatment plans may enhance outcomes and patient satisfaction. Further research with larger samples and longer follow-up is needed to assess long-term efficacy, mechanisms, and cost-effectiveness.
ETHICAL STANDARD
Ethical approval was obtained from the Karamanoglu Mehmetbey University's Clinical Research Ethics Committee on [15/01/2025], under the decision number [15-2025/09].
DATA AVAILABILITY STATEMENT
The datasets generated and/or analyzed during the current study are available from the corresponding author upon reasonable request.
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Edited by
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Scientifıc Editor:
José Maria Soares Júnior http://orcid.org/0000-0003-0774-9404
Publication Dates
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Publication in this collection
05 Dec 2025 -
Date of issue
2025
History
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Received
23 May 2025 -
Accepted
23 July 2025
