Psychosocial and Somatosensory Factors in Women with Chronic Migraine and Painful Temporomandibular Disorders

Assessment of chronic overlapping pain comorbidities for the management of temporomandibular disorders: Secondary analysis of a randomized clinical trial

BACKGROUND

Chronic painful temporomandibular disorders (TMD) are a functional pain syndrome that embodies a spectrum of clinical manifestations and expresses great complexity through the coexistence of multiple comorbidities.

OBJECTIVE

Evaluate the prevalence of pain comorbidities, explore the correlation between comorbidities, kinesiophobia, catastrophizing, and pain disability at baseline, and determine variables of interest for prediction response to physiotherapy interventions at different follow-up times.

METHODS

This is a secondary analysis of a previously conducted randomized controlled trial (RCT). Outcomes and covariables for this secondary analysis were collected from subjects with chronic TMD (≥3 months), based on the DC/TMD diagnostic criteria, assigned to a multimodal treatment and a second manual therapy control group. The participants underwent follow-up assessment at 7 and 19 weeks. The outcomes (dependent variables) for these analyses were craniofacial pain disability, catastrophizing, and kinesiophobia. However, these outcomes were also used as covariables of interest in addition to comorbidity prevalence and severity at baseline for different analyses. We performed linear regression analyses to determine the association between our outcomes and covariables at baseline and at different follow-ups.

RESULTS

Comorbidity severity explained craniofacial pain disability at baseline, showing a strong correlation (Standardized B: 0.40, p-value: 0.017). Higher comorbidity severity, led to higher craniofacial pain score. Comorbidity severity and baseline catastrophizing predicted a better response to treatment for craniofacial pain improvements at short and long term (R2 .22, p-value : 0.009 and R2 .19, p-value: 0.02 respectively).

CONCLUSION

This study provides insight into the prevention and clinical management of chronic pain related to TMD.

Pain sensitization and pain-related psychological factors in patients with temporomandibular disorders: an observational cross-sectional study

BACKGROUND

There is conflicting evidence on how central processing impairments affect patients with temporomandibular disorders (TMD). Moreover, there is sparse research on the assessment of endogenous pain modulation in this population through conditioned pain modulation (CPM) testing.

OBJECTIVE(S)

The main objective of this observational study was to evaluate the possible differences between myofascial TDM patients and healthy pain-free controls on psychophysical variables suggestive of central processing impairments (including temporal summation (TSP), pressure pain threshold (PPT) and conditioned pain modulation (CPM)).

METHODS

This is a cross-sectional observational study including a sample of patients with TMD and pain-free controls recruited from private and university clinics in Spain. Outcome measures included local and distal PPTs, temporal summation, conditioned pain modulation and psychological factors of depression, anxiety, kinesiophobia, fear avoidance beliefs and pain catastrophizing.

RESULTS

Fifty-nine patients with TMD of myofascial origin (32 years [IR: 25-43]) and 30 healthy, pain-free controls (29.5 years [IR: 25-41]) participated in the study and completed the evaluations. Patients with TMD showed significantly reduced CPM (p = 0.001; t = 3.31) and both local and distal PPTs (p < 0.05) when compared with controls, after adjusting for the influence of age and sex. TSP did not show any difference between the groups (p = 0.839; Z = 0.20). All psychological factors were higher in patients with TMD (p < 0.005), except for anxiety (p = 0.134).

CONCLUSION

Patients with myofascial TMD included in this study exhibited signs of altered central processing, linked to impaired descending pain modulation, distal hyperalgesia and psychological factors like depression, kinesiophobia, fear avoidance beliefs and pain catastrophizing but not anxiety.

Cross-sectional experimental assessment of pain modulation as part of multidimensional profiling of people with cervicogenic headache: protocol for a feasibility study

BACKGROUND

An endogenous pain modulation profile, reflecting antinociceptive and pronociceptive mechanisms, may help to direct management by targeting the involved pain mechanism. For individuals with cervicogenic headache (CeH), the characteristics of such profiles were never investigated. However, the individual nature of experiencing pain demands profiling within a multidimensional framework including psychosocial lifestyle characteristics. The objective of the current protocol is to assess the pain modulation profile, which includes psychosocial lifestyle characteristics among people with CeH.

METHODS AND ANALYSIS

A protocol is described to map pain modulation profiles in people with CeH. A cross-sectional non-randomised experimental design will be used to assess feasibility of mapping these profiles. The pain modulation profile is composed based on results on the Depression, Anxiety, Stress Scale, Pittsburgh Sleep Quality Index, Headache Impact Test and on responses to temporal summation of pain (pinprick), conditioned pain modulation and widespread hyperalgesia (mechanical pressure pain threshold and cuff algometry). Primary analyses will report results relating to outcomes on feasibility. Secondary analyses will involve an analysis of proportions (%) of the different psychosocial lifestyle profiles and pain profiles.

ETHICS AND DISSEMINATION

Ethical approval was granted by the Ethics Committee Research UZ/KU Leuven (Registration number B3222024001434) on 30 May 2024. Results will be published in peer-reviewed journals, at scientific conferences and, through press releases. Protocol V.3. protocol date: 3 June 2024.

Effect of propranolol on temporomandibular joint pain in repeatedly stressed rats

Stress substantially increases the risk of developing painful temporomandibular disorders (TMDs) by influencing the release of endogenous catecholamines. Propranolol, an antagonist of β-adrenergic receptors, has shown potential in alleviating TMD-associated pain, particularly when the level of catecholamines is elevated. The aim of this study was to explore whether intra-articular propranolol administration is effective in diminishing temporomandibular joint (TMJ) pain during repeated stress situations. Additionally, we investigated the effect of repeated stress on the expression of genes encoding β-adrenoceptors in the trigeminal ganglion. In the present study, rats were exposed to a stress protocol induced by sound, then to the administration of formalin in the TMJ (to elicit a nociceptive response), followed immediately afterward by different doses of propranolol, after which the analgesic response to propranolol was evaluated. We also assessed the levels of beta-1 and beta-2 adrenergic receptor mRNAs (Adrb1 and Adrb2, respectively) using reverse transcription-quantitative PCR (RT-qPCR). Our findings revealed that propranolol administration reduces formalin-induced TMJ nociception more effectively in stressed rats than in non-stressed rats. Furthermore, repeated stress decreases the expression of the Adrb2 gene within the trigeminal ganglion. The findings of this study are noteworthy as they suggest that individuals with a chronic stress history might find potential benefits from β-blockers in TMD treatment.

Temporomandibular treatments are significantly efficient in improving otologic symptoms

Symptoms of temporomandibular disorders (TMD) could be present as otologic symptoms like earache and dizziness in some patients. In most cases, these symptoms are not recognized because otolaryngologists fail to diagnose TMD as a source of the problem. This investigation was conducted to evaluate the effect of TMD treatments on the otologic symptoms which after taking history and clinical examinations seemed to be related to TMD. In the present study, the patients who were complaining of otalgia, ear fullness, tinnitus, hearing loss, and dizziness were evaluated by an ear fellow. Forty patients who had no known otologic or other primary causes to explain their symptoms, were referred to the orofacial pain clinic with the possible diagnosis of TMD. If the diagnosis was confirmed by an orofacial pain specialist, a combination of TMD treatments was administered to each case and the patients were followed up. The results showed that following implementation of treatment protocols for TMD, more than 50% of the patients reported complete or partial recovery in the second follow-up (p < 0.05). The most common otologic symptom of the referred cases was earache, and the most common associated complaint was neck pain. All the patients had one or more parafunctional habits. This study showed that TMD treatments were significantly efficient in improving otologic symptoms partially or completely and the authors concluded that for the patients with otolaryngologic unexplained symptoms, an overhaul examination is needed to assess TMD as a possible cause of the patient complaint. It is recommended that in cases with unexplained otologic symptoms, otolaryngologists care more about the neck trigger points (TP) and ask about the patient's parafunctional habits. Otolaryngologists and dentists need to be aware of the risk of developing otologic symptoms caused by these habits or cervical TPs.

Temporal Summation and Aftersensations of Second Pain in Women with Myofascial Temporomandibular Disorder Differ by Presence of Temporomandibular Joint Pain

Purpose

Mechanisms underlying myofascial temporomandibular disorder (mTMD) are poorly understood. One theory is dysfunction in the central mediation of pain, specifically in enhanced facilitatory pain modulation. Because mechanisms leading to central sensitization may differ for joint and muscle pain, this study of mTMD addressed phenotypic heterogeneity by temporomandibular (TM) joint pain in the examination of quantitative sensory testing (QST).

Patients and Methods

The stimulus dependent increase in second pain (temporal summation (TS)) and associated aftersensations (AS) were examined across groups of women with mTMD with TM joint pain and without, and a demographically matched control group.

Results

TS was slightly more evident in mTMD without joint pain vs with (p = 0.035), but AS were most robustly persistent in the group with joint pain vs without (p < 0.002).

Conclusion

While both subgroups demonstrated evidence of central sensitization relative to controls on one of two measures, differences in QST results, if replicated, may point to possible differences in the mechanisms that yield central sensitization. Alternatively, it may represent methodological artifacts that need to be addressed. Therefore, greater consideration should be given to symptom-based phenotypes in studies examining TS and AS.

Fear of Movement and Catastrophizing in Participants with Temporomandibular Disorders

AIMS

To assess differences in catastrophizing and kinesiophobia in relation to areas of pain and somatic symptoms among participants with temporomandibular disorders (TMDs) and controls.

METHODS

In total, 401 participants (333 women, 68 men, mean age: 45.8 years) in the TMJ Impact Project were examined in accordance with the Diagnostic Criteria for TMD, including clinical examination (Axis I) and psychosocial assessment (Axis II) augmented with imaging of the temporomandibular joint (TMJ). Of these, 218 participants had a painful TMD pain diagnosis, 63 had a nonpainful TMD diagnosis, and 111 had no TMD. Nine participants had missing data. Participants completed the Pain Catastrophizing Scale, Tampa Scale for Kinesiophobia, Areas of Pain figure, and the Patient Health Questionnaire-15 for assessing somatic symptoms.

RESULTS

Compared to controls, participants with TMD pain showed higher levels of catastrophizing (P = .017), kinesiophobia (P < .001), areas of pain (P < .001), and somatic symptoms (P < .001). Participants with nonpainful TMD showed a higher level of kinesiophobia (P < .001) than controls. There was a positive correlation between catastrophizing and kinesiophobia for participants with TMD pain (r = 0.33, P < .001) and nonpainful TMD (r = 0.42, P < .001).

DISCUSSION

The results suggest more fear of movement, as well as an association between catastrophizing and fear of movement, in participants with TMD pain and in participants with nonpainful TMD compared to controls. Assessment and management of fear of movement as well as catastrophizing may be useful as part of individualized treatment strategies for patients with TMD.

Psychophysical testing in chronic migraine and chronic tension type headache: An observational study

BACKGROUND

Clinical presentation is the key to the diagnosis of patients with migraine and tension-type headache, but features may overlap when both become chronic. Psychophysical parameters may distinguish both conditions. We aimed to compare psychophysical aspects of patients with chronic migraine, chronic tension-type headache and headache-free controls, and to determine whether these can predict headache frequency.

METHODS

An examiner blinded to the diagnosis assessed 100 participants (chronic migraine (n = 38), chronic tension-type headache (n = 31) and controls (n = 31)). Assessed variables included painful area, pressure pain thresholds, temporal summation, cervical range of motion, neck posture, headache and neck impact, quality of life, and kinesiophobia. Comparison between groups was performed with one-way ANOVA and multiple linear regression was used to assess the headache frequency predictors.

RESULTS

We found differences of both headache groups compared to controls (p < 0.01), but not between headache groups. Neck disability was a significant predictor of headache frequency for chronic tension-type headache (adjusted R² = 0.14; β = 0.43; p = 0.03) and chronic migraine (adjusted R² = 0.18; β = 0.51; p < 0.01).

CONCLUSIONS

Chronic tension-type headache and chronic migraine showed similar psychophysical results, but were significantly worse when compared to controls. The psychophysical examination did not discriminate between headache types. The variable best explaining headache frequency for both headache types was neck disability.

Pain catastrophising in the oro-facial pain population

BACKGROUND

Pain catastrophising is a maladaptive cognitive response characterised by an exaggerated negative interpretation of pain experiences. It has been associated with greater disability and poorer outcomes in chronic pain, to include several specific oro-facial pain conditions. The goal of this study was to examine pain catastrophising at a military oro-facial pain specialty clinic.

METHODS

This retrospective chart review (RCR) examined information collected at initial examination from 699 new patients seen between September 2016 and August 2019 at the Orofacial Pain Center at the Naval Postgraduate Dental School (Bethesda, MD). Pain catastrophising, pain characteristics, psychosocial factors and sleep were assessed using standardised scales. Linear regression was used to evaluate associations of patient characteristics and pain intensity with pain catastrophising. Mediation analyses were done to characterise the extent to which the relationship between pain intensity and pain catastrophising may be explained by anxiety, depression and insomnia.

RESULTS

Higher pain intensity, depression, anxiety, insomnia and younger age were each associated with higher pain catastrophising (all p < .05). A primary diagnosis of neuropathic pain was the strongest independent predictor of higher pain catastrophising. The relationship between pain intensity and pain catastrophising was partially mediated by anxiety, depression and insomnia.

CONCLUSIONS

In this RCR of a population of oro-facial pain patients, those diagnosed with neuropathic pain were most likely to display high levels of pain catastrophising, a characteristic which is associated with poor long-term pain outcomes. This is the first study to show that, independent of other patient characteristics, those suffering from neuropathic pains displayed the highest levels of pain catastrophising. This highlights the importance of also addressing psychosocial factors in the treatment of neuropathic pain conditions, which are commonly treated using a predominantly biomedical approach. Additionally, anxiety, depression and insomnia each partially explains the relationship between pain intensity and pain catastrophising.

Evaluation of the Relationship between Trait and State Anxiety and Temporomandibular Dysfunction

Background:

Anxiety is an important factor in the process of chronic pain in patients with Temporomandibular Dysfunction (TMD).

Objective:

The objective of this study was to evaluate the influence of minimally invasive management of muscular TMD on the levels of anxiety (state and trait), pain, and other parameters in patients with muscular TMD.

Methods:

A total of 83 patients (64 women and 19 men; mean age, 25.16 ± 4.40 years) who were clinically diagnosed with TMD were evaluated. During the first clinical session (T1) and after clinical evaluation and diagnosis, the participants filled out a pain visual analog scale and answered the Trait Anxiety Inventory (STAI-T) and State Anxiety Inventory (STAI-S). In addition, the bite strength of the participants was evaluated, and minimally invasive management (thermotherapy, orientation exercises, and cognitive behavioral therapy) was initiated in that session. After 8 weeks (T2), all parameters were reevaluated. The results obtained were statistically analyzed and found to have a significance level of 5%.

Results:

A significant decrease in pain, STAI-T, and STAI-S scales were observed from T1 to T2 (p < 0.0001). Higher values of bite strength were observed at T2 compared to T1 (p < 0.0001). Furthermore, a significant correlation was observed between the levels of pain, trait-anxiety, and state-anxiety.

Conclusion:

Minimally invasive management of TMD resulted in a reduction in the levels of pain and anxiety (trait and state) of the participants evaluated, suggesting a possible association of these factors with chronic myofascial pain.

Manual therapy and exercise in temporomandibular joint disc displacement without reduction. A systematic review

OBJECTIVE

The aim of this systematic review was to analyze the effectiveness of exercise and manual therapy interventions in patients with disc displacement without reduction.

METHOD

The authors performed a systematic review of Medline, EMBASE, PEDro, CINAHL, and Google Scholar databases. Two independent reviewers conducted the eligibility and quality assessment of studies. Interventions based on exercise and manual therapy regarding pain intensity and maximum mouth opening as primary outcomes were examined.

RESULTS

Ten articles were included, according to the inclusion criteria. Most of the interventions showed statistically significant improvements in the primary outcomes.

CONCLUSION

Results show that interventions based on therapeutic exercise or manual therapy may be beneficial and play a role in the treatment of disc displacement without reduction. Limited evidence suggests that exercise significantly improves mouth opening in comparison to splints. Due to the heterogeneity of the included studies, these results should be interpreted with caution.

Cross-cultural adaptation, reliability and validity of the Italian version of the craniofacial pain and disability inventory in patients with chronic temporomandibular joint disorders

Background

To develop an Italian version of the Craniofacial Pain Disability Inventory (CFPDI-I) and investigate its psychometric abilities in patients with temporomandibular disorders (TMD).

Methods

The CFPDI was translated following international standards. The psychometric analyses included reliability by internal consistency (Cronbach’s alpha) and test/retest stability (intraclass correlation coefficient, ICC); construct validity was investigated by matching (a priori hypotheses) the CFPDI-I with the Italian Neck Disability Index (NDI-I), a pain intensity numerical rating scale (NRS), the Italian Pain Catastrophising Scale (PCS-I), the Italian Tampa Scale of Kinesiophobia (TSK-I), and the Italian Migraine Disability Assessment Score Questionnaire (MIDAS) (Pearson’s correlation). Alpha was set at 0.05.

Results

Two hundred and twelve patients with chronic TMD completed the tool. The questionnaire was internally consistent (α = 0.95) and its stability was good (ICCs = 0.91). As hypothesised, validity figures showed CFPDI-I strongly correlated with the NDI-I (r = 0.66, p < 0.05) and moderately correlated with the NRS (r = 0.48, p < 0.05), PCS (r = 0.37, p < 0.05), TSKI (r = 0.35, p < 0.05) and MIDAS (r = 0.47, p < 0.05). Similar estimates were shown by CFPDI-I subscales.

Conclusions

The cross-culturally adapted version of the Craniofacial Pain and Disability Inventory (CFPDI-I) showed satisfactory psychometric properties that replicate those of the original version and, therefore, can be implemented in the clinical assessment of Italian people affected by TMD.

Efficacy of CoQ10 as supplementation for migraine: A meta-analysis

OBJECTIVES

Migraine ranks among the most frequent neurological disorders globally. Co-enzyme Q10 (CoQ10) is a nutritional agent that might play a preventative role in migraine. This meta-analysis aimed to investigate the effects of CoQ10 as a supplemental agent in migraine.

SUBJECTS AND METHODS

Web of Science, PubMed, and Cochrane Library were searched for potential articles that assessed the effects of CoQ10 on migraine. Data were extracted by two independent reviewers and analyzed with Revman 5.2 software (The Nordic Cochrane Centre, Copenhagen, Denmark).

RESULTS

We included five studies with 346 patients (120 pediatric and 226 adult subjects) in the meta-analysis. CoQ10 was comparable with placebo with respect to migraine attacks/month (P = 0.08) and migraine severity/day (P = 0.08). However, CoQ10 was more effective than placebo in reducing migraine days/month (P < 0.00001) and migraine duration (P = 0.009).

CONCLUSION

This is the first study to demonstrate the effects of CoQ10 supplementation on migraine. The results support the use of CoQ10 as a potent therapeutic agent with respect to migraine duration and migraine days/month. Nonetheless, more studies are needed to support the conclusions.

Management of pain in patients with temporomandibular disorder (TMD): challenges and solutions

Thanks to advances in neuroscience, biopsychosocial models for diagnostics and treatment (including physical, psychological, and pharmacological therapies) currently have more clinical support and scientific growth. At present, a conservative treatment approach prevails over surgery, given it is less aggressive and usually results in satisfactory clinical outcomes in mild–moderate temporomandibular disorder (TMD). The aim of this review is to evaluate the recent evidence, identify challenges, and propose solutions from a clinical point of view for patients with craniofacial pain and TMD. The treatment we propose is structured in a multi-modal approach based on a biobehavioral approach that includes medical, physiotherapeutic, psychological, and dental treatments. We also propose a new biobehavioral model regarding pain perception and motor behavior for the diagnosis and treatment of patients with painful TMD.