• Journal of Technologic Dentistry
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• v.42 no.3
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• pp.254-261
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• 2020

Purpose: This study aimed to investigate the effect of stress and oral parafunctional habits on temporomandibular joint disorders (TMD) in college students. Methods: An online survey comprising 354 questionnaires was conducted from May 23, 2020, to June 21, 2020. The collected data were analyzed using Student's t-test, one-way analysis of variance, correlation tests, and multiple regression analysis. Results: The stress symptom score was higher in females than in males. The symptoms of physical stress were significantly higher among students from the Department of Public Health, whereas those of psychological stress were higher among students from the Department of Physical Education. Both TMDs and oral parafunctional habits were higher among females, students of the Departments of Arts and Physical Education, and seniors. The higher the stress symptom level, the higher the scores for TMD and oral parafunctional habits. TMD and oral parafunctional habits were found to be most affected by physical stress. Conclusion: These findings indicate that a reduction in physical stress is required to decrease the prevalence of oral parafunctional habits and TMDs among college students. This can be achieved by the incorporation of physical activity programs, which may aid in reducing the symptoms of physical stress.

• Journal of Convergence for Information Technology
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• v.11 no.10
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• pp.215-222
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• 2021

The purpose of this study was to analyze the factors affecting the awareness of temporomandibular disorders in high school students and to provide basic data for the development of easy-to-access program to help the management of temporomandibular disorders. For data collection, convenience sampling was performed among academic high school students in Daejeon and North Jeolla Province to complete a self-administered questionnaire from December 1 to 30, 2019. The statistical analysis was conducted by t-test, one-way ANOVA, and Pearson correlation. Stepwise multiple regression analysis was conducted. Oral parafunctional habits were positively correlated with trait anxiety and both of them were positively correlated with the perceived symptoms of temporomandibular disorders. The most influential factors on the awareness symptoms of temporomandibular disorders in high school students were oral parafunctional habits, health habits, and trait anxiety. It is necessary to make positive communication and intervention, which meets high school age, in coping well with anxiety and managing oral parafunctional habits and apply an oral health promotion program that involves socio-psychological efforts to prevent them.

• Journal of Oral Medicine and Pain
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• v.19 no.2
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• pp.181-192
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• 1994

There have been many different theories on the etiology of temporomandibular disorders(TMDs). The objective of the study was to investigate the effects of occlusal fctors and recent life event changes as prediposing fctor on the development of temporomandibjlar disorders. To evaluate the above predisposing factor, the author used T-scan system(Tekscan Co. U.S.A.) for quantitative occlusal analysis, clinical examination for occlusal state and Social Readjustment Rating Scale(SRRS) for recent life event change units (LCU). 63 patients with TMDs and 57 patients with malocclusion presented at Wonkwang University Dental Hospital participated in this study. The subjects were grouped by Angle's classification and presence of absence of TMDs and parafunctional oral habits. Data gained with regard to contact number, contact force, contact time, occlusal state(number of total teeth and occluding teeth, overjet, overbite) and occlusal interferences (protrusive posterior contact, nonworking side interference, and RCP-ICP slide) and recent life event changes. The data were processed and analysed by SAS statistical package program, The results of this study were as follows : 1. There were no significant differences on both quantitative occlusal contact analysis and occlusal state between TMDs group and Angle's malocclusion group. Also, there were no differences among the Angle's classifications. But amount of overjet in TMDs group were more greater than that of malocclusion group. 2. There was no difference on protrusive posterior contact, and balancing contact between TMDs group and Angle's malocclusion group. Premature contact was more frequent in malocclusion group, but RCP-ICP slide was more frequent in TMDs group. And RCP-ICP slide was more freqent in Angle's class II malocclusion than Angle's I or III malocclusion. 3. Life changes units in TMDs group were higher than those in malocclusion group. And recent life change units in group with parafunctional oral habit were higher than those in group without parafunctional oral habits. Clenching was the most common habit among parafunctional oral habits.

• Journal of dental hygiene science
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• v.13 no.4
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• pp.471-479
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• 2013

This study is trying to grasp the stress of the male high school students and the correlation between the stress according to the academic and economic level and oral parafunctional habits, emphasizing the need for the education of oral parafunctional habits, providing the basic data in order to accomplish correctly until the oral health of the oral maxillofacial region. From May 2013 till July 2013, a self administered survey was conducted by the selected by convenience sampling from subjects of 1, 2 grade of two high school located in Chungnam, Korea. The study results were as follow: 1) Among five areas of stress, the stress of school life was the highest as 2.11 points and the stress of home problem was the lowest as 1.51 points; 2) the stress by class showed that grade 2 was higher than grade 1 in all areas. The stress of the school life (2.21) (p<0.01), interpersonal relationship (p<0.01), and own problem (p<0.05) showed the significant difference; 3) The significance analysis results between the five areas of stress according to the stress of latent variable and the oral parafunctional habits all showed the significant difference (p<0.001). The correlation between the stress and the oral parafunctional habits showed a weak negative correlation as -0.30, and the stress of the school life, own problem, environment problem, and interpersonal relationship showed very strong correlations more than 0.7; 4) Fit measures test result of stress, academic level, and family economic level model all showed more than 0.9 in good of fit index, adjusted goodness of fit index, normed fit index and root mean square residual and root mean square error of approximation values is all estimated less than 0.1, so it showed good model. From this study, it can be concluded that there is the correlation between stress and oral parafunctional habits.

• Journal of Oral Medicine and Pain
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• v.41 no.3
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• pp.110-117
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• 2016

Purpose: The purpose of this study is to determine factors influencing the duration of occlusal appliance (OA) treatment for patients with temporomandibular joint (TMJ) internal derangement. Methods: Ninety patients were included for this study, who satisfied the following including criteria: (i) those who were diagnosed as disc displacement of TMJ by taking magnetic resonance imaging (MRI) and (ii) those who were finished OA treatment. The subjects were classified into three groups according to the period of OA treatment: (i) early response group (<6 months), (ii) moderate response group (6 months-1 year), and (iii) delayed response group (>1 year). Demographic data, data from chief complaints and past history of temporomandibular disorder, data from clinical examination and diagnostic imaging including panoramic view and TMJ MRI were compared among groups. One-way ANOVA and chi-square analysis were used to test statistical significance. Results: There were no significant differences in demographic data, data from chief complaints and TMJ imaging. However, only the prevalence of oral parafunctional habits including bruxism, clenching, and unilateral chewing showed significant differences among groups. Conclusions: Oral parafunctional habits could be factors to influence the duration of OA treatment in the patients with TMJ internal derangement.

• Journal of Oral Medicine and Pain
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• v.23 no.4
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• pp.361-368
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• 1998

In order to evaluate the clinical features of the rcurred patients with temporomandibular disorders, 52 patients were subjected at the Dept. of Oral Medicine, PNUH from 1985 through 1996. As related to gender, duraton and diagnosis, Ll the relate factors-multiple diagnosis, emotinal problem, history of treatment, parafunctional habit, life distrubance, and trauma were analyzed. The obtained results were as follows : 1. The patients with multiple diagnosis were 83 percent and more often seen in women, chronic group and muscle-joint disorder group. 2. Duration of retreatment in chronic group and muscle-joint disorder was longer. 3. The patients with oral parafunctional habits were 89 percent and more often seen in women, chronic gorup, muscle-joint disorder group. 4. the Recurred patients showed 46 percent in history treatment, 42 percent in life distrubances, 39 percent in macrotrauma and 12 percent in emotional problem.

• Journal of Korean society of Dental Hygiene
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• v.16 no.1
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• pp.111-120
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• 2016

Objectives: The aim of this study was to investigate the association between self-esteem and temporomandibular disorder among high school students. Methods: A self-reported questionnaire was completed by 584 high school students in Gyeongnam. The questionnaire consisted of socio-demographic profile, anxiety, self-esteem, oral parafunctional habits, and temporomanibular disorder. Data were analyzed using SPSS 19.0 program. Results: In univariate analysis, there were significant differences between self-esteem and temporomandibular disorder(p<0.05). The self-esteem was negatively correlated with parafunctional habits(r=-0.253, p<0.001) and temporomandibular disorder(r=-0.221, p<0.001). In multivariate analysis, self-esteem was significantly associated with temporomandibular disorder(${\beta}=-0.119$, p=0.025) after adjusting for socio-demographic characteristics and anxiety. Conclusions: The self-esteem negatively influenced on temporomandibular disorder in the high school students.

• Journal of Korean Dental Science
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• v.13 no.2
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• pp.59-66
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• 2020

Purpose: The purpose of this study was to investigate the masseter muscle thickness before and after treatment using ultrasound sonography in patients with parafunctional habits. Materials and Methods: From September 2019 to March 2020, a total of 27 patients who visited the Department of Oral and Maxillofacial Surgery at Ewha Womans University Seoul Hospital were collected. The thickness of both masseter muscles was measured using a tablet ultrasound scanner. Statistical analysis was performed by using the IBM SPSS version 26.0 statistical package (IBM Corp) with significance level at 0.05. Result: According to the statistical results, the thickness of the masseter muscle was thicker on the right side than on the left, with no correlation with sex or age. The severity and duration of pain did not have a significant correlation with the thickness of the masseter muscle. Botulinum A toxin injection in the masseter muscle was the most effective way to reduce pain and reduce the thickness of the masseter muscle. Splint treatment also showed some effects in reducing the thickness of the masseter muscle. Conclusion: Based on the findings, it can be claimed that ultrasonography is simple, inexpensive and easily repeatable method to get real-time diagnosis and treatment results for masseter muscles.

• Journal of dental hygiene science
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• v.15 no.6
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• pp.721-727
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• 2015

The purpose of this study was to examine the impact of stress on the habits of temporomandibular disorder in college students. The subjects in this study were 396 male and female students who were in their first to fourth years at five different colleges located in Jeollabuk-do. The findings of the study were as follows: As for the degree of bad oral habits, "sleeping on one side" was the most common bad oral habit, followed by "enjoying caffeinated beverages," "resting the chin on the hand or a thing" and "chewing food in one side of the mouth only." As a result of analyzing their stress by general characteristics including gender, there were significant differences according to gender in stress about school life problems, one's own problems and economic difficulties, and only stress about one's own problems statistically significantly varied with academic year. When the correlation of the factors was analyzed, perceived stress about school life problems and one's own problems had a significant positive correlation with bad oral habit scores. When a multiple linear regression analysis was made to determine the influence of general characteristics and perceived stress on bad oral habit scores, gender, academic year, self-rated oral health status, stress about school life problems and stress about one's own problems were identified as significant variables. The findings of the study illustrated that there was an organic relationship between the bad oral habits and stress of the college students.

• The Journal of the Korean dental association
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• v.48 no.5
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• pp.379-390
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• 2010

The aim of this study was to investigate clinical and cephalometric characteristics of patients with anterior open bite and mandibular condylar resorption. Total of 45 subjects were recruited from the patients who visited the Department of Oral Medicine, Kyungpook National University Hospital in 2006 for treatment of temporomandibular dysfunction. After taking patient's history concerning temporomandibular joint dysfunction, clinical examination was performed and panoramic, transcranial, and lateral cephalometric radiographs were obtained. The cephalometric data were compared to those of normal Korean population. The results were as follow: 1. Clinical characteristics 1) Female was 4.6 time more prevalent than male, and 82.2% of the subjects were in second and third decade. 2) Angle's Class I occlusal type was 51%, Class II was 29%, and Class III was 20%. 3) The mean value of the overjet and overbite were 3.2mm and -1.1mm, respectively. 4) Most of the patients had parafunctional oral habits. 2. Cephalometric characteristics 1) SNA showed no significant difference between condyle resorption and normal group. However, in female resorption group, SNB was lesser and ANB was greater than those in normal group. 2) SN-GoMe and FMA increased in resorption group. 3) Palatal plane angle did not show significant difference between resorption and normal group. 4) Total posterior facial height was significantly smaller and total anterior facial height showed no significant increase as compared with those of the normal group. 5) Mandibular body length did not show any significant difference between resorption and normal group.