Prevalence Of Temporomandibular Disorders Research Articles

Prevalence of Temporomandibular Disorders (TMD) in Dental Patients at a Specialized Regional Medical Center in Italy

Prevalence of Temporomandibular Disorders (TMD) in Dental Patients at a Specialized Regional Medical Center in Italy

Climate temperature and seasonal influences on the prevalence of temporomandibular disorders in South Korea

This study aimed to explore seasonal variations in temporomandibular disorder (TMD) prevalence in South Korea, utilizing nationwide population-based big data. Data corresponding to the Korean Standard Classification of Diseases code of K07.6, which identifies TMD, were extracted from the Health Insurance Review and Assessment Service online platform for the period from 2010 to 2022. Additionally, we integrated these data with climate temperature records from the Korean Meteorological Administration. We subsequently conducted a statistical analysis of TMD patient data on a monthly and seasonal basis over the past 13 years to assess prevalence. Over the past 13 years, the number of TMD patients in Korea has steadily increased. The prevalence of TMD rose from 0.48% (224,708 out of a total population of 50,515,666) in 2010 to 0.94% (482,241 out of a total population of 51,439,038) in 2022, marking a 1.96-fold increase. Among children under 10 years of age, no significant differences were observed in TMD prevalence between boys and girls. However, a distinct female predominance emerged after the age of 10, with an average female-to-male ratio of 1.51:1. The peak prevalence of TMD occurred in individuals in their 20 s, followed by adolescents in their late 10 s. The majority of TMD patients were concentrated in Seoul and Gyeonggi province, with metropolitan areas accounting for 50% of the total patient count. Seasonally, TMD patient numbers showed no significant increase in winter compared with spring or summer. The temperature difference, defined as the absolute difference between the highest and lowest temperatures for each month, showed a positive correlation with TMD patient counts. A greater temperature difference was associated with higher patient counts. The strongest correlation between temperature differences and TMD patient numbers was observed in winter (r = 0.480, p < 0.01), followed by summer (r = 0.443, p < 0.01), and spring (r = 0.366, p < 0.05). Temperature differences demonstrated a significantly stronger correlation with the increase in the number of TMD patients than absolute climate temperatures. This aspect should be a key consideration when examining seasonal trends in TMD prevalence in South Korea.

Impact of Orthodontic-Surgical Treatments on the Signs and Symptoms of Temporomandibular Disorders: A Systematic Review.

Some patients exhibit temporomandibular joint or muscular disorders of the masticatory system before, during, or after orthognathic surgery (OS). These are collectively referred to as temporomandibular disorders (TMDs). This systematic literature review aimed to determine the relationship between orthodontic-surgical treatment and TMDs. An electronic search of the PubMed database, supplemented by a manual search, was performed; the search included any studies published between 2021 (date of the last search in a systematic review of the literature on the subject) and June 2023 that evaluate the prevalence of TMDs during orthodontic-surgical treatment. The diagnosis of TMDs had to be established using the diagnostic algorithm "diagnostic criteria for temporomandibular disorders (DC/TMDs)", and the diagnosis of disc displacement had to be confirmed using magnetic resonance imaging (MRI). The data were extracted and statistically analyzed. Of the 100 results, seven eligible articles were included, representing a total of 529 cases undergoing orthodontic-surgical treatment. A reduction in joint noises (64.8%), arthralgia (57 to 77%), and myalgia (73 to 100%) was found after orthodontic-surgical treatment despite the fact that a minority of patients exhibited these signs and symptoms even though they were asymptomatic before treatment. The effects of OS on disc position were objectively unpredictable. After surgery, the presence of headaches decreased without significance and the risk of their occurrence was very low (1%). The studies converged toward a reduction in the amplitudes of mouth opening and lateral/protrusion movements. Finally, after the treatment, mandibular function was improved. Under the conditions of this study, OS seems to have a positive impact on the signs and symptoms of TMDs; however, it is not possible to predict the consequential effects on the position of the TMJ disc, whether it is initially in a normal position or displaced.

Prevalence of Temporomandibular Disorders Among Dental Students of College of Dentistry-Hawler Medical University.

Background: Temporomandibular disorders (TMD) are a group of conditions affecting the jaw joint and the muscles that control jaw movement, can cause pain and discomfort in the jaw, face, and neck, and affect a person's ability to speak, chew, and swallow. Aim: The present study aims to specify the prevalence of temporomandibular joint disorder among dental students of Hawler Medical University. Method: The research conducted involved a group of 120 dental students, with an equal number of males and females from Hawler Medical University. The required data were collected by developing a particular questionnaire by modifying Fonseca's questionnaire. The study was performed during a period of one month from January to February. Visual Analogue Scale (VAS) was used to determine the severity of the pain and dysfunction in the participant's muscles. Results: More than 75% of the participants had no deviation. In 65.8% of the students, class 1 occlusion was observed. Trauma was observed in just 12.5% of the participants. Bite and bruxism habits were observed in 24.2% and 10% of the students respectively. Moreover, 30% of students had disturbed sleep. Severe TMJ pain was reported in 4.2% and 0.8% of females and males respectively. Conclusions: The occurrence of TMD among males was less than among females. Most of the participants had mild TMJ pain. There was a significant association between symptoms of TMD and para-functional habits. Keywords: Temporomandibular disorder, Temporomandibular joint, Fonseca's questionnaire.

Impact of professional, recreational and nonsinging on temporomandibular disorders - a comparative study based on a self-assessment questionnaire

BackgroundThis study investigates the relationship between professional and recreational singing on temporomandibular disorders (TMDs) in women compared to a nonsinging control group.MethodsA total of 288 female subjects between the ages of 18 and 45 participated in the self-assessment questionnaire including demographic data, as well as questions on vocal practice and TMDs symptoms. Depending on the singing time per week, the (non)vocalists were assigned to the groups professional (n = 96), recreational (n = 96) and nonsingers (n = 96).ResultsThe TMDs prevalence in professional singers (42%) was higher than that in recreational singers (31%) and noticeably higher than that in nonsingers (25%). The Fisher-Freeman-Halton exact test showed that the differences between the groups were not noticeable (p = .053) but could be formulated as tendencies. The professionals suffered much more from restricted jaw movement (p = .004; OR = 2.718; 95% CI = 1.409–5.242), temporomandibular joint sounds (p < .009; OR = 2.267; 95% CI = 1.264–4.064) and temporomandibular pain (p = .010; OR = 2.333; 95% CI = 1.264–4.308) than nonsingers.ConclusionsSinging might have an enhancing effect on the appearance of TMDs. In particular, professional singers suffered more from self-reported TMDs than recreational singers and nonsingers. In addition to the high level of physical workload if participating in professional singing, the psychosocial impact should be investigated more in further studies. No new treatment strategies resulted from this study, as the etiological significance of singing is still unclear. Knowledge about risk factors for multifactorial TMDs can help practitioners and patients prevent and treat TMDs.

The relationship between pregnancy and temporomandibular disorder (TMD) through diagnostic criteria for temporomandibular disorders (DC/TMD) axis II evaluation: a case-control cross-sectional study

IntroductionThis study focuses on temporomandibular disorders (TMDs), which affect the temporomandibular joint and related muscles and have multiple causes. Recent studies have examined the connection between menstrual cycles, estrogen levels, and TMDs, but results are inconsistent, highlighting the need for more research. The aim is to explore the prevalence of TMDs in pregnant women and consider how hormonal changes during pregnancy might influence these disorders.MethodsIn this cross-sectional case-control study, we compared 32 pregnant women with 35 non-pregnant women. We evaluated several TMD-related factors such as pain levels, chronic pain classification, scores on the Jaw Functional Limitation Scale-20 and Oral Behaviors Checklist, and psychological health. We used various statistical methods including descriptive statistics, chi-square tests, linear regression, and adjustments for multiple comparisons to analyze the data.ResultsPregnant women showed different pain perceptions, generally reporting less pain and lower severity. Nonetheless, these differences were not uniform across all TMD-related measures. Linear regression did not find a consistent link between pregnancy and TMD scores, except for chronic pain grade, which was not significant after adjusting for multiple comparisons. There was a significant relationship between depression and TMD severity, emphasizing the need to consider mental health in TMD evaluations.DiscussionThe findings suggest that pregnancy is neither a risk nor a protective factor for TMD. Differences in pain perception, functional status, and psychological health were observed in pregnant women but were not consistent for all TMD-related aspects. The role of estrogen in TMJ health and TMD risk is complex and requires further study. The research highlights the necessity of including mental health, especially depression, in TMD assessments. More comprehensive research with larger sample sizes is essential to better understand the connections between pregnancy, TMD, and hormones, aiming to improve TMD management in pregnant women and others.

Temporomandibular joint disorders in skeletal class II patients referred to orthognathic surgery: A cross-sectional study.

The aim of this study was to assess the prevalence of Temporomandibular Disorders (TMD) in subjects with skeletal class II dentofacial deformity referred for orthognathic surgery, as well as to elucidate its association with sociodemographic and psychosocial features. This was a cross-sectional study using the Research Diagnostic Criteria for Temporomandibular Disorders. The sample comprised class II skeletal patients referred to an Oral and Maxillofacial Surgery center in the Brazilian Northeast. Seventy-three subjects were enrolled and completed the data collection, which consisted of a physical examination according to Axis I of the Research Diagnostic Criteria for Temporomandibular Disorders and facial analysis. Women represented 82.2% of the sample. Among the assessed subjects, 68.5% were already undergoing orthodontic treatment, and the mean overjet of patients was 6.97 mm. The prevalence of TMD in this sample was 46.6%, with muscular disorders being the most common. Patients with an anteroposterior discrepancy greater than 7 mm showed a higher occurrence of TMD (p = 0.017). This study demonstrated a high prevalence of TMD in skeletal class II patients referred for orthognathic surgery, especially in those with a pronounced overjet, being Group I (muscular disorders) and Group III (degenerative disorders) the most prevalent.

WITHDRAWN: Detection of myofascial trigger points in the masseter muscle using ultrasonography in patients with myogenous temporomandibular disorder

We aimed to investigate the diagnostic efficacy of ultrasonography (US) using gray scale B-mode and ultrasound elastography (UE) in detecting myofascial trigger points (MTPs) in the masseter muscles of patients with myogenous temporomandibular disorder (TMD). A diagnostic cross-sectional study of patients with MTPs in the masseter muscles using US was conducted. The diagnostic results from the US examinations were compared with the clinical examination reference standard to determine the diagnostic efficacy of US. MTPs were detected as band-like hypoechoic localized areas with reduced vibration amplitude (stiffer) under US B-mode and UE imaging. In total, 116 sites from 29 patients (3 males, 26 females) with a mean age of 39.4 years were examined. US exhibited sensitivity of .946 (95% CI: .851-.989) and specificity of .900 (95% CI: .795-.962) in detecting MTPs when compared to the clinical examination. Diagnostic accuracy ranged from .902 to .950 when assuming 3 levels of myogenous TMD prevalence. US B-mode and UE imaging exhibited diagnostic accuracy comparable to the standard clinical examination carried out by a trained specialist. It can be a reliable technique in the detection and localization of MTPs for the diagnosis of myogenous TMD and localization of MTPs for therapeutic purposes.

Shoulder Girdle Disability, Dysfunction, and Pain in Participants with Temporomandibular Joint Disorders: A Cross-Sectional Survey on Prevalence and Associations

Background: There is a rising prevalence of temporomandibular disorders (TMD) and, therefore a need to improve the management of these conditions. No studies have been done to assess the possible associations between the shoulder girdle and the temporomandibular joint (TMJ) in participants with TMD. Objective: The aim of the study was to estimate the prevalence of disability, dysfunction and pain in the shoulder girdle in participants with TMD. In addition, the association between the disability, dysfunction and pain in the shoulder girdle and temporomandibular joint in participants with temporomandibular disorders was investigated. Methods: A cross-sectional study was performed where participants were invited to complete an online survey if they received a score of two or more on the TMD-pain screener. The survey included questions on demographics, the TMJ, and the shoulder girdle. Results: A total of 186 individuals with TMD participated in the study of whom, 56% ( n = 104) reported having shoulder pain and 45% ( n = 84) reported having previous shoulder treatment. A positive correlation was found between the level of TMD, as indicated by the mean Fonseca Anamnestic index score and the pain ( r = 0.29, p &lt; 0.001), disability ( r = 0.24, p = 0.001), and total scores ( r = 0.28; p &lt; 0.001) on the Shoulder Pain and Disability index and similarly with shoulder pain at its worst ( r = 0.19, p = 0.009). Conclusion: The associations found between the pain and disability of the shoulder girdle and TMJ give insight into the relationship between the two areas in participants with TMD.

Clinical Study to Evaluate the Prevalence of TMD Before and After Delivery of Complete Denture

Temporomandibular disorder (TMD) is a broad term that encompasses number of clinical problems including the temporomandibular joints, the masticatory musculature and related structures, or both. The etiology of TMD is ambiguous since the signs and symptoms which exist in patients with natural teeth may also being observed in edentulous patients. Thus, TMD is a multifactorial problem with varying symptoms combinations and rates. Relationship between removable complete dentures and tempromandibular joint disorder in different gender and age groups. A total of 30 patients (15 female and 15 male) who submitted to Prosthodontics Department, College of Dentistry, Al-Mustansiriyah University to make a new complete denture. The age of participants ranges from (40-80) years with the mean age (65.9) years. Two clinical examiners conducted the patient’s examination; the first examiner takes on a questionnaire to identify the TMD symptoms signs and. Clinical examination of the patients was assessed through part I, II of research diagnostic criteria pre and post one and two months of applying the prosthesis. The clinical evaluation of prosthesis done by the second clinical examiner related to (retention, stability, fitness, occlusion and centric relation) was evaluated twice at predetermined intervals of 1 and 2 months after construction and delivery of denture. Evaluation performed by using Dawson's bimanual technique and recorded within clinical case sheet for complete denture records. The present study shows that the highest frequency of TMD obtained in age group of 70-80 years old followed by age group of 60-69 years old at all intervals, internal derangement (ID frequency) significantly higher in females than male patients (p=0.02). There is significant statistical difference regarding the Myofacial pain dysfunction (MPD) frequency according to the time of using the dentures, those patients with Diabetes Mellitus (DM) formed the highest percentage (39.1%) of those whom presented with MPD followed by those with Hypertension (HT) (32%) and those with history of HT and DM represent (17.4%) only The results also illustrated that prosthesis properties (retention, stability, fitness, occlusion and centric relation) show significant relation with TMDs improvement post one and two months. Most patients with complete denture perceived improvement in the sign and symptoms of TMDs.&#x0D;

Study of Prevalence of Temporomandibular Disorders among Undergraduate Students

Temporo-mandibular joint function has been extensively studied for more despite extensive investigation, the complicated etiology of TMJ dysfunction has remained a mystery for more than a century. Temporomandibular disorder (TMD) is a sub - class of painful orofacial conditions characterized by complaints of pain in the region of the temporomandibular joint (TMJ), difficulty concentrating craniocervicofacial muscles, especially mastication muscles, limitations of mandibular movement, and the presence of articular clicking. Emotional stress, occlusal interferences, tooth loss, postural deviation, muscles of mastication neuromuscular both internal and external dysfunction anomalies in Temporo-mandibular joint anatomy, and the multiple interrelationships between these factors all contribute to the complicated etiology of TMD.Aim: Determine the prevalence of temporomandibular joint disorder between college students. The sample for this sectional potential study consisted of 691 college students (339 male and 352 female). Self-reported questionnaires were used to determine the incidence and severity of TMJ disorders. By virtue of the quantity and frequency of notable replies, the rankings were upgraded to an intensity ranking. Results:56.6% of students reported some level of TMD, including 39.7% with mild TMD, 12.2% with moderate TMD, and 4.6% with severe TMD. Historically, no significant correlation between gender and TMD severity was observed.Conclusion: This student population exhibited a high prevalence of TMD; however, the majority of cases were mild. The statistical significance of the association between TMD severity and gender is no longer proven. Despite having TMD. The students had little knowledge of their conditions.

Age and sex differences in comorbidities in adult temporomandibular disorders: A cross-sectional study using Korea National Health and Nutrition Examination Survey (KNHANES).

To investigate the relationship between Temporomandibular disorder (TMD) and associated comorbidities in groups matched according to age and sex. Using data from the cross-sectional fifth Korea National Health and Nutrition Examination Survey (KNHANES). Of the 25,534 eligible KNHANES, 17,762 adults aged ≥19 years who responded to survey questionnaire on TMD and comorbidities. Subjects were classified into eight groups according to age and sex. Logistic regression analyses were performed to evaluate the association between TMD and comorbidities according to age and sex. Of the enrolled participants, 2,107 (11.86%) complained of ≥1 TMD symptoms. In all groups, odds ratios (ORs) for prevalence of TMD were >1 in those with tinnitus. Rhinitis was closely associated with TMD in 6 groups. ORs for TMD with comorbidities according to age and sex were as follows: hypertension, men aged 50-64 years (OR 0.62; CI 0.41-0.94); ischemic heart disease, men aged 35-49 years (4.38; 1.54-12.47); osteoarthritis, women aged 50-64 years (1.38; 1.03-1.86); diabetes mellitus, men aged 35-49 years (0.21; 0.05-0.88); depression, men aged 50-64 years (1.68; 1.00-2.83), women aged 35-49 years (1.39; 1.05-1.85) and women aged 65-80 years (2.01; 1.46-2.77); migraine, men aged 50-64 years (1.60; 1.14-2.25), women aged d35-49 years (1.44; 1.14-1.81) and women aged 35-49 years (1.43; 1.07-1.90); cold hypersensitivity in the hands and feet, men aged 19-34 years (1.64; 1.05-2.58), men aged 35-49 years (1.68; 1.04-2.70), men aged 65-80 years (1.74; 1.09-2.75) and women aged 35-49 years (1.45; 1.15-1.84); olfaction disorder, men aged 50-64 years (2.49; 1.39-4.43); voice disorder, men aged 50-64 years (2.25; 1.28-3.96) and women aged 65-80 years (1.69; 1.09-2.63). This study confirmed that the types and effects of comorbidities related to prevalence of TMD may differ according to the patient's age and sex and this result will increase the predictability of the onset of TMD.

Prevalence and Clinical Characteristics of Temporomandibular Disorders in Adults: An Epidemiological Study in the Mediterranean Region of Turkiye

The prevalence and clinical characteristics of temporomandibular disorders (TMD) in the Mediterranean region of Türkiye have not yet been thoroughly investigated. Objective: This study aimed to determine the prevalence and severity of TMD in a sample of the population in this region and to characterize the clinical findings related to TMD. Methods: Four hundred and one participants were included in this study. “Presence of TMD” in the participants was evaluated using the Fonseca Anamnestic Index. Through clinical examination, the findings in the participants were classified as limited mouth opening, deviation, temporomandibular joint (TMJ) sounds, TMJ pain, and muscle pain. Results: The prevalence of TMD was found to be 66.8%, with “Mild TMD” being the most frequent diagnosis among the participants. Clinical findings related to TMD were detected in 48.6% of the participants, and TMJ sounds were the most common clinical finding. TMD was most commonly found in participants over the age of 52, and clinical findings related to TMD were most common in participants between the ages of 25 and 38. In addition, a relationship was found between “Presence of clinical findings” and the gender and age of the participants (p &lt; 0.001 for both comparisons). Conclusion: The results show that females may be more prone to TMD than males. During clinical examinations, it should be considered that “Presence of clinical findings” may be related to gender and age.

Comment on "Job demands and temporomandibular disorders: mediating and moderating effects of psychological distress and recovery experiences".

Abstract The article by Mori et al. (2023) examines the relationship between job demands, psychological distress, and temporomandibular disorders (TMD) among Japanese workers, using a cross-sectional survey of 1,278 respondents. The authors report that high job demands are associated with increased TMD prevalence through the mediation of psychological distress, and that relaxation and control moderate this relationship. The study contributes to the literature on the occupational and psychological factors of TMD, and suggests that recovery experiences can mitigate the negative effects of job demands on TMD. However, the study has some limitations, such as the use of self-reported measures, the lack of longitudinal data, and the potential impact of the COVID-19 pandemic on the results. Therefore, further research is needed to confirm the causal relationships and the generalizability of the findings.

Prevalence of temporomandibular disorders in clear aligner patients using orthodontic intermaxillary elastics assessed with diagnostic criteria for temporomandibular disorders (DC/TMD) axis II evaluation: A cross-sectional study.

The objective of this investigation is to assess the relationship between the utilisation of orthodontic intermaxillary elastics and temporomandibular disorder (TMD) symptoms in clear aligner patients and to examine the correlation between the elastic usage time with the Diagnostic Criteria for Temporomandibular Disorders (DC/TMD)-Axis II Evaluation Forms. This study was carried out on a total of 40 clear aligner patients using intermaxillary elastics in the experimental group and 30 clear aligner patients who did not use any intermaxillary elastics in the control group. The data were evaluated using the Mann-Whitney U, chi-square, Fisher's exact chi-square, and Fisher Freeman Halton exact chi-square tests. The characteristic pain intensity, mastication, mobility, communication, global and PHQ-9 scores of the experimental group were significantly higher than those of the control group (p < .05). The characteristic pain intensity score, interference score and chronic pain grade score of patients using Class III elastics were statistically significantly higher than those of patients using Class II elastics (p < .05). Patients who used elastics for less than 6 months had statistically significantly higher PHQ-9 scores than those who used elastics for more than 6 months (p < .05). Orthodontic treatment may affect occlusion, bite force and jaw movement, which may cause or worsen TMD symptoms, and the DC/TMD questionnaires can determine if orthodontic patients acquire TMD by assessing their psychosocial state and pain-related problems.

The psychological aspects of dental students with temporomandibular disorders at Hue University of Medicine and Pharmacy

Background: Psychological factors such as anxiety and depression have been recognized as the etiology of temporomandibular disorders. Objectives: The study aimed to evaluate the prevalence of temporomandibular disorders in dental students and describe the state of depression and anxiety and related factors in the students with the disorders. Materials and methods: 323 students at the Faculty of Odonto-Stomatology, Hue University of Medicine and Pharmacy, were examined to detect temporomandibular disorders, using the DC/TMD axis I. Then GAD-7 and PHQ-9 questionnaires were used to screen for anxiety and depression in the group with the disorders. Results: The proportion of students with temporomandibular disorders was 38.1%, intra-articular disorders accounted for the highest rate (80.5%). The percentages of depression and anxiety among students with the disorder were 28.4% and 55.3%, respectively. 41.5% of TMD students had mild anxiety and the same proportion of students had risk of depression. Risk factors associated with depression and anxiety were economic status and excercise, respectively (p &lt; 0.05). Conclusions: The percentage of students with temporomandibular disorders is relatively high. The majority of students with the disorders are at risk for depression and low level of anxiety. There is a link between the economic status and depression, between exercise and anxiety. Key words: anxiety, depression, temporomandibular disorders.

Prevalence of temporomandibular disorders in juvenile idiopathic arthritis evaluated with diagnostic criteria for temporomandibular disorders: A systematic review with meta-analysis.

Juvenile idiopathic arthritis (JIA) is a very common systemic inflammatory rheumatic disorder affecting the musculoskeletal system in children below 16 years of age. Joint inflammation and tissue destruction is the prime characteristic of the disease. Along with the systemic involvement in the long joints, several studies are mentioning the increased association of temporomandibular disorders (TMDs) in JIA. This current systematic review intends to find the prevalence rate of TMD in JIA-affected individuals as compared to healthy controls. We have searched in PubMed, Scopus and Ovid SP for articles published between the timeframe 1 January 1990 and 1 June 2023. All the searched articles were subjected to the Population, Exposure, Comparison, and Outcome model (PECO) based on which inclusion or exclusion is carried out. Participants (P) are children below 18 years of age, Exposure (E) is children or adolescents with a diagnosis of JIA, Comparator is age and gender-matched healthy controls who has no JIA or any systemic disorder, Outcome (O) is the prevalence of TMD. Only the studies that evaluated TMD using diagnostic criteria for evaluation of TMD (DC/TMD) were included in the analysis. We have set the exclusion to the following reasons- diagnostic sensitivity studies, case reports, and systematic reviews. The software Review Manager Version 5.4 (Cochrane Collaboration) was used to perform the pooled analysis. We measured the risk ratio (RR) between the two groups (JIA and no JIA) for the outcome TMD. The pooled total included subjects were 366 in this review with an established diagnosis of JIA as evaluated by DC/TMD. The overall effect of the pooled data suggests that there is a significant difference in the TMD prevalence in the JIA group when compared to the control, results suggest that TMD is more prevalent in the JIA group RR 3.86; 95% CI [2.59, 5.76]. Overall, based on the data we can suggest a positive relationship between JIA and TMD, hence presence of JIA can be a risk factor for the development of TMD. The sensitivity of DC/TMD is low when compared to magnetic resonance imaging.

Predictive model for temporomandibular disorder in adolescents: Decision tree.

Temporomandibular disorders (TMD) do not only occur in adults but also in adolescents, with negative impacts on their development. To propose a predictive model for TMD in adolescents using a decision tree (DT) analysis and to identify groups at high and low risk of developing TMD in the city of Recife, PE, Brazil. This cross-sectional study was conducted in Recife on 1342 schoolchildren of both sexes aged 10-17 years. The analyses were performed using Pearson's chi-squared test and Fisher's exact test, as well as the CHAID algorithm for the construction of the DT. The SPSS statistical program was used. The prevalence of TMD was 33.2%. Statistically significant associations were observed between TMD and sex, depression, self-reported orofacial pain, and orofacial pain on clinical examination. The DT consisted of self-reported orofacial pain, orofacial pain on physical examination, and depression, with an overall predictive power of 73.0%. The proposed tree has a good predictive capacity and permits to identify groups at high risk of developing TMD among adolescents, such as those with self-reported orofacial pain or orofacial pain on examination associated with depression.

Frequency and Severity of Temporomandibular Disorders Among Weightlifters at Fitness Centers in a Subset Population of Saudi Arabia: A Cross-Sectional Observational Study.

Background Teeth clenching in weightlifters is a common finding that may result in temporomandibular disorders (TMDs). This study aimed to evaluate the severity and frequency of TMDs among weightlifters at fitness centers in Saudi Arabia. Methods A cross-sectional study was designed to collect data from weightlifters at fitness centers. A non-probability convenient sampling technique was applied using a valid and reliable Fonseca's questionnaire on a Google Sheet (Google, Mountain View, CA) to collect participant data. The survey was conducted from November 2022 to April 2023. Epi Info software (CDC,Atlanta, Georgia) was used to calculate the sample size, and a minimum sample of 278 was required. The data underwent analysis using SPSS version 20 (IBM Corp., Armonk, NY). Results Data analyzed from 375 participants revealed that 192 (51.2%) had mild signs of TMD, whereas 128 (34.13%) of the respondents had no symptoms of TMD. A significant difference was observed among female participants in all the temporomandibular joint severity categories. A statistically significant difference was observed between both genders concerning frequent headaches, earache, and nervousness. Conclusion The prevalence of TMD is high worldwide. Unsupervised athletic activity may result in the occurrence of TMD. Fonseca's questionnaire findings reveal a mild prevalence of TMD in weightlifters.

Prevalence of temporomandibular disorders in the Brazilian population: A systematic review and meta-analysis

ABSTRACT This systematic review aimed to assess the prevalence of temporomandibular disorders (TMD) in the Brazilian population, with studies that used the RDC/TMD or DC/TMD as diagnostic tools. A total of 6365 people from 11 studies were included. Sample mean age ranged from 12 to 69.5 years. The pooled prevalence of TMD was 33.6% (95% CI 31.5–35.8; I2 = 37.2). Prevalence of TMD was higher in females (37.0%) than in males (29.3%). Our results indicate that TMD is a prevalent condition across Brazil’s territories. The results from this meta-analysis can help calculate more accurate sample sizes for future studies.