• Journal of TMJ Balancing Medicine
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• v.7 no.1
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• pp.1-10
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• 2017

In order to establish a relationship between sleep related breathing disorder (SBD) and temporomandibular disorders (TMDs), a literature review was performed. A researching was performed based on PubMed, including english languages. Any clinical study identified relationship between SBD and TMD were selected in this review. 13 studies were analyzed in this review. According to SBD diagnosis, articles were grouped as follows: polysomnographic diagnosis (n=7), clinical diagnosis (n=2) and survey/self-report (n=4). 12 articles established a positive relation between SBD and TMD and 1 did not. SBD would be associated with protrusion/retrusion degree, myofascial pain, muscular and joint pathology, and other orofacial findings. It was analyzed that the retrusion of the mandible had the significant influence on the severity of the SBD.

• Journal of Convergence for Information Technology
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• v.12 no.3
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• pp.204-213
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• 2022

This study was conducted to investigate the stress and temporomandibular joint disorders that can affect the oral health level of college students and to identify the relationship between oral health-related quality of life. Data survey was conducted from June 3, 2021 to July 8, 2021, targeting 227 college students in some areas of Daejeon, and was analyzed using independent sample t-test, one-way ANOVA, Pearson correlation analysis, and multiple regression analysis. As a result, temporomandibular joint disorder showed a positive correlation with all stress sub-factors, and oral health-related quality of life showed a negative correlation with all stress sub-factors and temporomandibular joint disorder. Also, it was found that temporomandibular joint disorder, interpersonal stress, and values stress had an effect on oral health-related quality of life. Based on the above results, it is required to find a systematic way to improve the quality of life related to oral health by preventing stress and temporomandibular joint disorder among college students.

• Journal of Oral Medicine and Pain
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• v.44 no.2
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• pp.65-68
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• 2019

Temporomandibular disorders (TMD), involving the masticator system of temporomandibular joint (TMJ) and masticator muscle, can be characterized with the cardinal signs and symptoms of jaw pain, noises and limitation of mandibular range of motion. However, TMD requires differential diagnosis due to its heterogeneous characteristics with various causes despite the similar clinical profiles. Oral cancer involving TMJ and the masticator system, although infrequent, can be one of these causes and should be considered one of the most life-threatening disease mimicking TMDs. This report introduces a case of masticator space tumor originally diagnosed as TMD in a 73-year-old Korean female with previous history of brain tumor. The clinical signs and symptoms closely mimic that of TMD which may have disrupted differential diagnosis. We discuss here key points for suspecting TMDs of secondary origin, namely, that of cancer and the implications it has on dental clinicians.

• Journal of Korean society of Dental Hygiene
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• v.17 no.4
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• pp.589-600
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• 2017

Objectives: This study aims to prove that stress directly or indirectly affects the jaw joint disorders and provide basic data for developing oral health promotion program. Methods: The study was conducted by distributing a questionnaire survey to more than 350 people from December 30, 2016 to January 7, 2017. Among them, 336 copies were collected and 314 copies were utilized eventually, except Section 314, for the final analysis. Regression analysis was performed to investigate the factors affecting temporomandibular joint disorders. Results: As a result, academic achievement and stress were found to affect the temporomandibular joint disorders. The higher the level of education and stress, the higher the subjective symptoms of jaw joint disorder. Conclusions: Because stress affects temporomandibular joint disorders, it is necessary to find out the cause of stress not only for professional treatment but also for solution of temporomandibular disorder. Thus, stress level must be conisdred as influential factors in developing a jaw joint disease prevention program.

• Imaging Science in Dentistry
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• v.46 no.2
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• pp.127-131
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• 2016

Purpose: This study was performed to compare the condylar position in patients with temporomandibular joint disorders (TMDs) and a normal group by using cone-beam computed tomography (CBCT). Materials and Methods: In the TMD group, 25 patients (5 men and 20 women) were randomly selected among the ones suffering from TMD according to the Research Diagnostic Criteria for Temporomandibular Disorders (RDC/TMD). The control group consisted of 25 patients (8 men and 17 women) with normal temporomandibular joints (TMJs) who were referred to the radiology department in order to undergo CBCT scanning for implant treatment in the posterior maxilla. Linear measurements from the superior, anterior, and posterior joint spaces between the condyle and glenoid fossa were made through defined landmarks in the sagittal view. The inclination of articular eminence was also determined. Results: The mean anterior joint space was 2.3 mm in the normal group and 2.8 mm in the TMD group, respectively. The results showed that there was a significant correlation between the superior and posterior joint spaces in both the normal and TMD groups, but it was only in the TMD group that the correlation coefficient among the dimensions of anterior and superior spaces was significant. There was a significant correlation between the inclination of articular eminence and the size of the superior and posterior spaces in the normal group. Conclusion: The average dimension of the anterior joint space was different between the two groups. CBCT could be considered a useful diagnostic imaging modality for TMD patients.

• Journal of the Korean Association of Oral and Maxillofacial Surgeons
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• v.44 no.5
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• pp.232-236
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• 2018

Objectives: Hormonal changes during menopause alter a woman's susceptibility to some disorders. Information regarding the prevalence of temporomandibular disorder (TMD) in menopausal women is limited in the literature. In this study, the prevalence and severity of TMDs were compared between menopausal and non-menopausal women. Materials and Methods: The study included 140 women (69 premenopausal and 71 postmenopausal) 45 to 55 years of age that were examined in Shiraz Dental School, Shiraz in Iran. The Helkimo clinical dysfunction index (Di) was used to evaluate temporomandibular joint (TMJ) dysfunction. The data were analyzed using chi-square and Fisher's exact tests. Results: Occurrence of TMD was significantly higher in menopausal than non-menopausal women (P<0.001). All the TMD criteria based on Helkimo Di except range of mandibular movement were significantly more common in menopausal women. The range of mandibular movement was not significantly different between menopausal and non-menopausal women (P=0.178). Conclusion: The results from this study show that TMD can be considered more common and severe in menopausal than non-menopausal women. This finding indicates that, similar to other conditions in menopausal women such as arthritis and osteoporosis, TMD should be taken into consideration by dental and medical professionals.

• Journal of Korean society of Dental Hygiene
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• v.18 no.5
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• pp.763-770
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• 2018

Objectives: The purpose of this study was to investigate the relationship between mental healthlevel,usual lifestyle, and thelevelofsubjectivesymptoms of some adults. Methods: From 17 September-28 November 2017, 260 adults living in Seoul, Gyeonggi, and Incheon comple tedaquestionnaireconsistingofgeneral characteristics (6 items), mental health level (14 items), usual lifestyle (9 items), and subjective symptoms level (9 items) on a 5-point scale. Results: In the mental health level, there was a significant difference in sex, age, marital status, education level, andexistenceofstress, and there were differences in age, marital status, occupation, and existence of stress in usual lifestyle. There were statistically significant differences in age, marital status, occupation, and existenceofstress in the subjective symptoms of temporomandibular disorders. Conclusions: It is necessary to develop a program that can be applied in parallel with counseling therapy related to mental health during the clinical treatment of temporomandibular disorders.

• Journal of Korean Medicine Rehabilitation
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• v.25 no.4
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• pp.41-46
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• 2015

Objectives This systematic review will analyse randomised controlled trials (RCTs) of manual therapy in patients with temporomandibular disorders (TMDs) to evaluate the efficacy of this approach. Methods RCTs will be identified in the following ten databases based on searches starting with their inception: MEDLINE, EMBASE, CENTRAL, four Korean databases as KoreaMed, DBPIA, NDSL, and RISS and three Chinese databases as CNKI, VIP and Wanfang. The quality of these studies will be analysed using the Cochrane risk of bias. A meta-analysis will be conducted, and subgroup analysis will be considered if comparatively large heterogeneity is detected. Conclusions We plan to publish this systematic review in a peer-reviewed journal. Findings from this review may contribute to the treatment process in clinical situations. Trial registration number: PROSPERO 2015: CRD42015024090

• Journal of Korean Dental Science
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• v.17 no.1
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• pp.14-35
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• 2024

The temporomandibular joint (TMJ) is one of the most unique joints in the human body that orchestrates complex movements across different orthogonal planes and multiple axes of rotation. Comprising the articular eminence of the temporal bone and the condylar process of the mandible, the TMJ integrates five major ligaments, retrodiscal tissues, nerves, and blood and lymph systems to facilitate its function. Cooperation between the contralateral TMJ and masticatory muscles is essential for coordinated serial dynamic functions. During mouth opening, the TMJ exhibits a hinge movement, followed by gliding. The health of the masticatory system, which is intricately linked to chewing, energy intake, and communication, has become increasingly crucial with advancing age, exerting an impact on oral and systemic health and overall quality of life. For individuals to lead a healthy and pain-free life, a comprehensive understanding of the basic anatomy and functional aspects of the TMJ and masticatory muscles is imperative. Temporomandibular disorders (TMDs) encompass a spectrum of diseases and disorders associated with changes in the structure, function, or physiology of the TMJ and masticatory system. Functional and pathological alterations in the TMJ and masticatory muscles can be visualized using various imaging modalities, such as cone-beam computed tomography, magnetic resonance imaging, and bone scans. An exploration of potential pathophysiological mechanisms related to the TMJ anatomy contributes to a comprehensive understanding of TMD and informs targeted treatment strategies. Hence, this narrative review presents insights into the fundamental functional anatomy of the TMJ and pathological changes that evolve with TMD progression.

• Journal of Oral Medicine and Pain
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• v.31 no.4
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• pp.365-373
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• 2006

This study suggested correction of excessive mouth opening or maximum occlusal contact to analyse occlusal contact time, occlusal contact number and force through evaluation of occlusal pattern in policemen with temporomandibular disorders. The community of policemen influence on temporomandibular disorder's development and progress due to other condition of mouth opening and maximal occlusal contact. Repeated training or changes of usual life style may cause imbalance of stomatognathic system including the masticatory muscle, then develop or aggravate pain of temporomandibular joints and associated structures. This study uses T-scan II system(Tekscan Co., USA) for evaluation on occlusal pattern may influence temporomandibular disorders, and then the subjects take a sensor at 20 mm opening for maximal occlusal contact force. The policemen with temporomandibualr disorders get more long time on maximum contact timing, more short on end contact timing, and more force on end contact force than general society's. So they get closure of mouth with more short time and more force, then transfer remaining load to temporomandibular joint. There are no statistically significances between affected side and occlusal pattern of occlusal contact time and force. There are Left -right dental arch imbalances seems on Rt. dental arch if affected side is right and Lt. dental arch if affected side is left. In above results, It's worth due consideration that policemen with temporomandibular disorders get more smooth mandibualr movement and less force on maximal occlusal contact position.