压力痛阈测试在颞下颌关节病中的应用

压力痛阈测试(pressure pain threshold,PPT)作为定量感觉测试的一项指标已经被用于颞下颌关节病的临床研究,其在揭示疾病疼痛的发生机制、预测疾病发展过程、判断不同治疗的临床效果差异等方面有巨大作用。本文就PPT在颞下颌关节病中的研究进展及其局限性作一综述。     

Correlation of somatization,depression, and chronic pain with clinical findings of the temporomandibular disorders in asymptomatic women

ABSTRACT

Objective: The aim of this study was to correlate degree of depression, somatization, and chronic pain in asymptomatic women with clinical findings, using Research Diagnostic Criteria/Temporomandibular disorders (RDC/TMD).

Methods: A total of 200 female participants, ages 18–65, filled out a standard RDC/TMD axis II form for the assessment of chronic pain, disability, depression, and non-specific physical symptoms and underwent clinical examination of the temporomandibular joint. Correlation of clinical findings (axis I) and axis II assessment was performed using Spearman’s correlation test, with significance set at p < 0.05.

Results: There was a significant correlation between depression scores (p < 0.04), chronic pain (p < 0.001), and non-specific physical symptoms without questions about pain (p = 0.008).

Discussion: The highest scores on the Graded Chronic Pain Scale were observed in patients with arthralgia, while patients with myofascial pain scored higher on depression and somatization tests.     

Clinical factors affecting the outcome of occlusal splint therapy of temporomandibular joint disorders

The purpose of this study was to test the hypothesis that (1) the presence of a clinical temporomandibular joint-related disorder has effects on short-term changes in temporomandibular joint pain, and that (2) clinical variables of time since pain onset predict treatment outcomes of occlusal splint therapy. The study comprised 76 patients with unilateral temporomandibular joint pain. The clinical disorder subgroup included 47 patients with a clinical pain side-related diagnosis of internal derangement type I (n = 16), internal derangement type III (n = 19), and degenerative joint disease (n = 12). The clinical non-disorder subgroup consisted of 29 patients without a temporomandibular joint disorder. A logistic regression analysis was used to compute the odds ratio for the clinical variables of time since pain onset, adjusted for age, gender, pretreatment pain level, and clinical subgroup. For the temporomandibular joint pain measurements there was no significant 'session'/'clinical subgroup' interaction (P = 0.470). Significant increase in benefit of a successful outcome of 'pain reduction >70%' occurred with a time since pain onset of 2 years might belong to the unsuccessful treatment group of 'pain reduction <30%' was strong (6.0) and significant (P = 0.026). Diagnosis of temporomandibular joint disorder proved not to be linked to changes in therapeutic outcome measures of temporomandibular joint pain. Time since pain onset was an important prognostic determinant of successful occlusal splint therapy.     

Associations among temporomandibular disorders,chronic neck pain and neck pain disability in computer office workers: a pilot study

Neck pain is the most common musculoskeletal complaint among computer office workers. There are several reports about the coexistence of neck pain and temporomandibular disorders (TMD). However, there are no studies investigating this association in the context of work involving computers. The purpose of this study was to verify the association between TMD and neck pain in computer office workers. Fifty‐two female computer workers who were divided into two groups: (i) those with self‐reported chronic neck pain and disability (WNP) (n = 26) and (ii) those without self‐reported neck pain (WONP) (n = 26), and a control group (CG) consisting of 26 women who did not work with computers participated in this study. Clinical assessments were performed to establish a diagnosis of TMD, and craniocervical mechanical pain was assessed using manual palpation and pressure pain threshold (PPT). The results of this study showed that the WNP group had a higher percentage of participants with TMD than the WONP group (42·30% vs. 23·07%, χ² = 5·70, P = 0·02). PPTs in all cervical sites were significantly lower in the groups WNP and WONP compared to the CG. Regression analysis revealed TMD, neck pain and work‐related factors to be good predictors of disability (R² = 0·93, P < 0·001). These results highlighted the importance of considering the work conditions of patients with TMD, as neck disability in computer workers is explained by the association among neck pain, TMD and unfavourable workplace conditions. Consequently, this study attempted to emphasise the importance of considering work activity for minimising neck pain‐related disability.     

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疼痛治疗分为药物治疗和非药物治疗。药物治疗包括非甾体类抗炎药、阿司匹林和扑热息痛等非阿片类镇痛药、阿片类镇痛药、"辅助"药物如抗抑郁药阿米替林和抗惊厥药卡马西平等。非药物治疗包括神经刺激疗法、神经阻滞疗法、外科手术、物理治疗、心理-行为疗法等。本文介绍我们临床上常见的颞下颌关节骨关节炎、肌筋膜疼痛、神经病理性疼痛(非典型牙痛、治疗后神经痛、三叉神经痛)及复合性局部疼痛综合征的主要临床用药和理论基础,如非甾体类抗炎药特异性COX-2抑制剂、改善骨关节炎症状和关节结构的药物硫酸氨基葡萄糖、阿片类药物曲马多、三环类抗抑郁药阿米替林、新一代抗惊厥药加巴喷丁等。     

Effect of hypnosis on oral function and psychological factors in temporomandibular disorders patients

Summary This study investigated the effect of hypnosis in patients with temporomandibular disorders (TMD) with focus on oral function and psychological outcomes. Forty women (mean age ± s.d.: 38·6 ± 10·8 years) suffering from TMD (mean duration 11·9 ± 9·9 years) were randomized to four individual 1‐hour sessions of either hypnotic intervention or a control condition of simple relaxation. Pain intensity was assessed three times daily on a 0–10 Numerical Rating Scale. Additional outcomes were TMD‐associated symptoms assessed by the Research Diagnostic Criteria examination form and questionnaire, psychological symptoms (Symptom Check List 60), pain coping strategies (Coping Strategies Questionnaire), sleep difficulties (Pittsburgh Sleep Quality Index) and use of analgesics. Data were analyzed with between‐groups within‐subjects anova s. The hypnosis group significantly reduced the daily NRS pain scores from 4·5 ± 2·1 at baseline to 2·9 ± 2·4 after treatment (P < 0·001) compared to the control group where no significant changes were found (4·2 ± 1·4 to 3·9 ± 1·5) (P = 0·733). Number needed to treat for a 50% pain reduction was 4·0. The hypnosis group also increased use of the coping strategy ‘reinterpreting pain sensations’ from 5·2 ± 6·9 to 10·3 ± 6·8 (P < 0·001). Both groups exhibited significant reductions in the number of painful muscle palpation sites and pain on palpation (P < 0·004), in number of awakenings due to pain (P < 0·006), and in somatization, obsessive compulsive symptoms and anxiety (P < 0·004). Hypnosis thus appears to effectively reduce some aspects of complex TMD pain.     

The effects of manual therapy and exercise directed at the cervical spine on pain and pressure pain sensitivity in patients with myofascial temporomandibular disorders

Summary No studies have investigated the effects of the treatments directed at the cervical spine in patients with temporomandibular disorders (TMD). Our aim was to investigate the effects of joint mobilization and exercise directed at the cervical spine on pain intensity and pressure pain sensitivity in the muscles of mastication in patients with TMD. Nineteen patients (14 females), aged 19–57 years, with myofascial TMD were included. All patients received a total of 10 treatment session over a 5‐week period (twice per week). Treatment included manual therapy techniques and exercise directed at the cervical spine. Outcome measures included bilateral pressure pain threshold (PPT) levels over the masseter and temporalis muscles, active pain‐free mouth opening (mm) and pain (Visual Analogue Scale) and were all assessed pre‐intervention, 48 h after the last treatment (post‐intervention) and at 12‐week follow‐up period. Mixed‐model anovas were used to examine the effects of the intervention on each outcome measure. Within‐group effect sizes were calculated in order to assess clinical effect. The 2 × 3 mixed model anova revealed significant effect for time (F = 77·8; P < 0·001) but not for side (F = 0·2; P = 0·7) for changes in PPT over the masseter muscle and over the temporalis muscle (time: F = 66·8; P < 0·001; side: F = 0·07; P = 0·8). Post hoc revealed significant differences between pre‐intervention and both post‐intervention and follow‐up periods (P < 0·001) but not between post‐intervention and follow‐up period (P = 0·9) for both muscles. Within‐group effect sizes were large (d > 1·0) for both follow‐up periods in both muscles. The anova found a significant effect for time (F = 78·6; P < 0·001) for changes in pain intensity and active pain‐free mouth opening (F = 17·1; P < 0·001). Significant differences were found between pre‐intervention and both post‐intervention and follow‐up periods (P < 0·001) but not between the post‐intervention and follow‐up period (P > 0·7). Within‐group effect sizes were large (d > 0·8) for both post‐intervention and follow‐up periods. The application of treatment directed at the cervical spine may be beneficial in decreasing pain intensity, increasing PPTs over the masticatory muscles and an increasing pain‐free mouth opening in patients with myofascial TMD.     

咬合板对颞下颌关节紊乱病相关颌面部疼痛的影响

颞下颌关节紊乱病（temporomandibular disorders, TMD）是口颌面部慢性痛的主要来源,严重干扰日常活动。咬合板是颞下颌关节紊乱病的最常用的治疗方法之一,但其疗效尚未完全明了。学者们多年来致力于对咬合板的作用机制、疗效的研究,但至今尚未得出统一的结果。该文将对咬合板的作用机制、咬合板的分类、TMD相关疼痛的种类与咬合板的选择、TMD的其他保守治疗与咬合板的关系四个方面对于咬合板治疗颞下颌关节紊乱病相关颌面部疼痛的疗效进行进行综述。     

颞下颌关节紊乱病患者疼痛的临床描述分析

目的通过研究颞下颌关节紊乱病（TMD）患者对疼痛的主观描述情况,分析TMD患者疼痛的特点。方法选择以口颌面部疼痛为主诉的TMD患者90例为研究对象,检测患者疼痛的强度和相关功能丧失的程度,记录患者自述的疼痛规律和描述疼痛的词汇。结果90例患者主要为轻到中等强度的疼痛,男女之间以及急、慢性期之间疼痛强度的差异无统计学意义（P>0.05）。TMD疼痛对咀嚼功能的影响最大,其次是对心情状况有比较大的影响。急、慢性期患者下颌静止时疼痛出现率无统计学差异（P>0.05）。急性期患者常用酸痛、隐痛、刺痛和抽着痛来描述疼痛,慢性期患者常用的词汇是钝痛、木痛和胀痛。结论急、慢性期TMD导致的疼痛强度均较低,主要影响患者的咀嚼功能和心理状态。急、慢性TMD疼痛的描述词汇有所不同。     

Psychosocial factors associated with pain outcomes in patients with painful temporomandibular disorders and headaches

The objective of this study was to assess the association between psychosocial factors (in terms of anxiety, somatization, depression, and optimism) and pain (in terms of headache pain intensity and pain-related disability), in patients with a painful temporomandibular disorder (TMD) and one of the following headache types: migraine, tension-type headache (TTH), or headache attributed to TMD, corrected for the influence of bruxism. A retrospective study was conducted at an orofacial pain and dysfunction (OPD) clinic. Inclusion criteria were painful TMD, with migraine, TTH, and/or headache attributed to TMD. Linear regressions were performed to assess the influence of psychosocial variables on pain intensity and on pain-related disability, stratified per headache type. The regression models were corrected for bruxism and the presence of multiple headache types. A total of 323 patients (61% female; mean age 42.9, SD 14.4 years) were included. Headache pain intensity only had significant associations in TMD-pain patients with headache attributed to TMD, and anxiety showed the strongest relation (β = 0.353) with pain intensity. Pain-related disability was most strongly associated with depression in TMD-pain patients with TTH (β = 0.444), and with somatization in patients with headache attributed to TMD (β = 0.399). In conclusion, the influence of psychosocial factors on headache pain intensity and pain-related disability depends on the headache type presenting.     

Expanding the taxonomy of the diagnostic criteria for temporomandibular disorders

There is a need to expand the current temporomandibular disorders' (TMDs) classification to include less common but clinically important disorders. The immediate aim was to develop a consensus‐based classification system and associated diagnostic criteria that have clinical and research utility for less common TMDs. The long‐term aim was to establish a foundation, vis‐à‐vis this classification system, that will stimulate data collection, validity testing and further criteria refinement. A working group [members of the International RDC/TMD Consortium Network of the International Association for Dental Research (IADR), members of the Orofacial Pain Special Interest Group (SIG) of the International Association for the Study of Pain (IASP), and members from other professional societies] reviewed disorders for inclusion based on clinical significance, the availability of plausible diagnostic criteria and the ability to operationalise and study the criteria. The disorders were derived from the literature when possible and based on expert opinion as necessary. The expanded TMDs taxonomy was presented for feedback at international meetings. Of 56 disorders considered, 37 were included in the expanded taxonomy and were placed into the following four categories: temporomandibular joint disorders, masticatory muscle disorders, headache disorders and disorders affecting associated structures. Those excluded were extremely uncommon, lacking operationalised diagnostic criteria, not clearly related to TMDs, or not sufficiently distinct from disorders already included within the taxonomy. The expanded TMDs taxonomy offers an integrated approach to clinical diagnosis and provides a framework for further research to operationalise and test the proposed taxonomy and diagnostic criteria.     

A comparative clinical and radiographic study on patients with chronic facial pain with and without temporomandibular disorder presenting to an otolaryngology clinic

ABSTRACT

Objective: Facial pain associated with temporomandibular disorder (TMD) is considered a component of Costen’s syndrome. However, prior to the current study, no previous clinical and radiographic studies have addressed facial pain in patients with TMD.

Methods: The study included 212 patients with chronic facial pain examined in an otolaryngology clinic. These were stratified into 132 patients with TMD and 80 patients without TMD. Clinical and radiographic findings were documented in both groups.

Results: Forty-eight patients in the TMD group had normal endoscopic findings and clear CT scans and had their facial pain directly attributable to TMD.

Conclusion: In patients presenting with facial pain, where nasal endoscopy reveals no abnormality, TMD should be specifically addressed, especially if CT scans of the paranasal sinuses are clear.     

Correlation between the levels of non‐specific physical symptoms and pressure pain thresholds measured by algometry in patients with temporomandibular disorders

Recent studies showed that patients with chronic TMD pain also feature increased sensitivity in other craniofacial regions, and even in remote peripheral areas, suggesting that nociceptive processing is centrally facilitated in this patient population. The aim of this study was to investigate the existence of a negative correlation between the levels of non‐specific physical symptoms and pressure pain thresholds measured by algometry at sites distant from the chief complaint of oro‐facial pain in patients with TMD. A total of 20 female patients were evaluated comprising 11 patients diagnosed with myofascial pain (Group I of RDC/TMD) and 9 patients with arthralgia (Group III of RDC/TMD), with both reporting chronic TMD pain for at least 3 months. Patients were tested by the pressure algometry technique, and, in the same visit, clinical diagnosis and levels of non‐specific physical symptoms, including pain‐related issues or not, were obtained. The raw scores were then standardised into a T‐score. The possible correlation between the dependent variable levels of non‐specific physical symptoms and pressure pain thresholds measured by algometry at sites distant from the chief complaint of oro‐facial pain was assessed with Spearman's correlation coefficient. Results were considered statistically significant, which stood a lower than 5% probability of occurring by chance (P < 0·05). A statistically significant (P = 0·02) negative correlation (?0·51) was found to exist between the levels of non‐specific physical symptoms, only if including issues involving pain‐related symptoms, and experimental pressure pain thresholds in patients with painful TMD.     

The gap between dental education and clinical treatment in temporomandibular disorders and orofacial pain

Implementation of research findings in patient care ideally will follow in a continuous cycle, and clinical questions from practitioners should stimulate research. Even in the most optimal situations, there will be a gap between the steady flow of new findings from research and their eventual implementation in clinical practice. In the clinical practice of temporomandibular disorders and orofacial pain (TMD/OFP) simple cases outnumber the more complex cases by far. Therefore, research implications for the general dental practitioner, whose patients are rarely represented in research populations, may differ from what is published and taught. Treatment options like counselling, occlusal treatments (reversible as a rule and irreversible by exception) and physiotherapy can be very successful in the hands of the general dental practitioner. European dental schools should define additional amendments to the recently proposed profile and competencies for the European dentist, in order to focus on the relevant and current knowledge on temporomandibular disorders and orofacial pain. These amendments should address the adequate diagnosis and management of non-complex TMD cases and the need to refer to a TMD/OFP specialist in complex cases. Professional organizations such as the European Academy of Craniomandibular disorders can endorse better TMD/OFP education and training.     

Timing of arthrocentesis in the management of temporomandibular disorders: an integrative review and meta-analysis

The aim of this study was to assess the best timing to perform arthrocentesis in the management of temporomandibular disorders with regard to conservative treatment. A systematic search based on PRISMA guidelines, including a computer search with specific keywords, reference list search, and manual search was performed. Relevant articles were selected after three search rounds for final review based on six predefined inclusion criteria, followed by a round of critical appraisal. Eleven publications, including eight randomized controlled trials and three prospective clinical studies, were included in the review. The studies were divided into three groups based on the timing of arthrocentesis: (1) arthrocentesis as the initial treatment; (2) early arthrocentesis; and (3) late arthrocentesis. Meta-analysis was carried out to compare the efficacy of improvement in mouth opening and pain reduction in the three groups. All three groups showed improvement in mouth opening and pain reduction, with forest plots suggesting that arthrocentesis performed within 3 months of conservative treatment might produce beneficial results. We conclude that there is a knowledge gap in the current literature regarding the preferable timing to perform arthrocentesis in the management of temporomandibular disorders, and more high-quality randomized controlled trials are required to shed light on this subject.