• The Journal of the Korean dental association
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• v.21 no.4 s.167
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• pp.285-287
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• 1983

음식물을 씹거나 삼키는 정상적인 하악운동이외에 악안면 근육의 활동에 의해 상, 하악 치아가 접촉하거나, 비정상적인 근육활동이 있을 때 이 현상을 이갈이(Bruxism)이라 합니다. 이갈이 습관은 대개 수면중에 나타나나 깨어 있는 상태에서도 비정상적인 근육수축을 관찰할 수 있읍니다. 이러한 현상을 저작근의 근전도(Electromyogram, EMG)를 기록하거나, 구강내에 장치된 원격계측장치로 치아접촉을 관찰함으로써 정상적인 저작이나 연하작용과 비교할 수 있습니다. 이갈이의 발생빈도는 학자들에 따라 서로 다르게 보고되고 있으며, 수면중 이를 가는 사람들은 대부분 이갈이 습관을 알지 못하며, 단지 10%정도만이 이가는 소리를 알 뿐입니다. 본문에서는 이갈이와 수면중의 생리적 현상과의 관계, 저작근에 미치는 영향과 이갈이 발생에 대한 중치신경의 작용을 검토함으로써 이갈이를 이해하는데 도움이 되고저 합니다.

• Journal of Dental Rehabilitation and Applied Science
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• v.34 no.4
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• pp.253-261
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• 2018

Purpose: The purpose of this study was to analyze correlation between bruxism and occlusal contacts on balancing side. Materials and Methods: The purpose of this study is to compare the difference of group function and balancing side occlusal contacts according to bruxism and sex, A total of 100 adults that aged 26-37 years (39 bruxers and 61 non-bruxers) were examined. The lateral excursion and balanced occlusal contacts were analyzed to determine the correlation with bruxism. The occlusal contacts were recorded by T-Scan system and articulating paper. Results: The group function was the highest in 61.5% of bruxers and 47.5% of non-bruxers. In comparison between males and females, group function was 58.9% in males and 37.0% in females. Occlusal contacts on non-working side occurred in 48 out of 100 patients. There were 51.2% of the cases in the bruxers and 46.0% in the non-bruxers. Statistically, there was no correlation between the bruxism and occlusal contacts on non-working side. There was no correlation between sex and balancing occlusal contacts. Conclusion: There was no significant correlation between bruxism and occlusal contacts on non-working side. The group function was the highest in bruxers when lateral excursion was occurred.

• Journal of Oral Medicine and Pain
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• v.30 no.1
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• pp.69-77
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• 2005

The purposes of this study were to develop and introduce a novel intraoral appliance for bruxism composed of power switch and biofeedback device and further to examine inter- and intra-reliability of the appliance prior to clinical tests. The newly-developed appliance consisted of detection sensors, a central processing unit (CPU), a reactor and a storage unit and a displayer. Compact-sized, waterproof switches were selected as bruxism detection sensor and any sensor activation by clenching or grinding event was processed at the CPU and transmitted, by radio wave, to the reactor and storage unit and triggered auditory or vibratory signal, subsequently producing biofeedback to the patient with bruxism. The data on bruxing event in the storage unit can be displayed on the computer, making it possible analyzing frequency, duration and nature of bruxism. Cast models were obtained from ten volunteers with normal occlusion to evaluate reliability of the appliances. For inter-operator reliability on the intraoral appliances, each operator of the two fabricated the appliance for the same subject and compared the minimal contact forces provoking auditory biofeedback reaction in vertical, lateral and central directions. Intra-operator reliability was also investigated on the appliances made by a single operator at two separate times with an interval of two days. Conclusively, the newly-developed appliance is compact and safe to use in oral circumstance and easy to make. Furthermore, it had to be proven reliability excellent enough to apply in clinical settings. Thus, it is assumed that this appliance with the processor and the storage of data and auditory or vibratory biofeedback function is available and useful to analyze and control bruxism.

• Journal of dental hygiene science
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• v.16 no.6
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• pp.458-463
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• 2016

This study aimed to assess changes in maximum bite force and psychological elements in patients with bruxism treated with botulinum toxin who visited the hospital with a chief complaint of masseter hypertrophy. From among the subjects with masseter hypertrophy as the chief complaint, 10 patients with and 10 without bruxism were selected. We measured bite force prior to botulinum toxin injection and at 2, 4, 8, and 12 weeks after the injection and assessed changes in psychological elements by using Symptom Checklist 90 Revision. The study results showed statistically significant differences in maximum bite force on both the right and left sides between the patients with and those without bruxism, according to periodic changes (p<0.05). Depression elements showed statistically significant changes in the patients with bruxism (p<0.05). In the bruxism and non-bruxism groups, the patients recovered from anxiety in accordance with the periodic changes (p<0.05). Our study results indicate that the patients with bruxism show significant changes in interpersonal sensitivity, depression, and anxiety according to the treatment periods, and that occlusal force and depression were significantly related. Therefore, when setting a treatment plan for bruxism, multilateral psychological elements must be considered, along with functional elements.

• Journal of Oral Medicine and Pain
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• v.33 no.1
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• pp.41-48
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• 2008

The focus of this study is to analyze the effect of stress on the health of bruxism patients using the MBTI system. The most common personality type will be identified among the bruxism patients and by understanding their personality & their handling of stress, more comprehesive and effective treatment plan can be constructed. The study will also conclude that the type of personality has big effect on the cause of bruxism, and that this will be considered in the treatment plan in this hospital. The result of the study is as follow. First, more bruxism patients were type I than type E. It can be suggested that this result is due to the introversive people maintaining their energy how within themselves, and private are less to likely to release there stress than the expressive people. Second, among the bruxism patients significantly more type T were found compared to type F. This implies the bruxism tend to follow principals, scientific and analysing during decision making rather than basing their decision an meanings, emotions and influences. Thirdly, more bruxism patients clarified into ST in comparison to non-bruxism patients. This is thought to be due to probable increased stress and anxiety following ST people's tendency to more strict and realistic thinking according to effectiveness, evidence-based and productivity. Fourth, the type IJ was the most of the bruxism patients. We can come to the conclusion that decision-oriented introversion people who have hard to change, a thoroughgoing preparation characters are likely to grind their teeth by their detailed characters. Fifth, the type IT was the most of the bruxism patients. Bruxism patients are usually influenced by spirit, easily hearted, awed of relationship and attention. So, their intensity of stress is much bigger because of their personality. The last, Type IS was the most of the bruxism patients. It means that introvert sensitive types who have characters of calm, passive but defence to other's emotion, also neutral, keep moderation, and have cold-heartedness are likely to grind their teeth frequently. In conclusion it is evident that bruxism patients have particular personality types. Precisive, analysing and introversive bruxism patients are expected to have higher sensitivities to stress.

• Journal of the korean academy of Pediatric Dentistry
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• v.29 no.4
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• pp.586-591
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• 2002

Bruxism can be generally regarded as a diurnal clenching or nocturnal teeth grinding or a combination of both. Clenching of the teeth is forceful closure of the opposing dentition in a static relationship of the mandible to the maxilla, whereas grinding of the dentition is forceful closure of the opposing dentition in a dynamic maxillo-mandibular relationship as the mandibular arch moves through various excursive positions. The causes of bruxism are not yet discovered clearly, but most consistently mentioned cause is psychological stress. Bruxism can be also associated with sleep disorders, medication, and disturbances of the central nervous system. There is no permanent treatment method of bruxism, so the objectives for management of bruxism are reduction of psychological stress and treatment of signs and symptoms of bruxism by occlusal adjustment, occlusal splint, systemic medication and physical therapy. These cases report present three cases of children with bruxism. The bruxism was reduced in these patients wearing occlusal splint.

• Journal of Dental Rehabilitation and Applied Science
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• v.28 no.1
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• pp.87-101
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• 2012

Bruxism is extensively defined as a diurnal or nocturnal parafunctional habit of tooth clenching or grinding. The etiology of bruxism may be categorized as central factors or peripheral factors and according to previous research results, central factors are assumed to be the main cause. Bruxism may cause tooth attrition, cervical abfraction, masseter hypertrophy, masseter or temporalis muscle pain, temporomandibular joint arthralgia, trismus, tooth or restoration fracture, pulpitis, trauma from occlusion and clenching in particularly may cause linea alba, buccal mucosa or tongue ridging. An oral appliance, electromyogram or polysomnogram is used as a tool for diagnosis and the American Sleep Disorders Association has proposed a clinical criteria. However the exact etiology of bruxism is yet controversial and the selection of treatment should be done with caution. When the rate of bruxism is moderate or greater and is accompanied with clinical symptoms and signs, treatment such as control of dangerous factors, use of an oral appliance, botulinum toxin injection, pharmacologic therapy and biofeedback therapy may be considered. So far, oral appliance treatment is known to be the most rational choice for bruxism treatment. For patients in need of esthetic correction of hypertrophic masseters, as well as bruxism treatment, botulinum toxin injection may be a choice.

• Journal of Dental Rehabilitation and Applied Science
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• v.30 no.1
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• pp.36-44
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• 2014

Bruxism is a much-discussed clinical issue in dentistry. Although bruxism is not a life-threatening disorder, it can influence the quality of human life, especially through dental problems, such as, frequent fractures of dental restorations and pain in the orofacial region. This research has a goal to investigate the diagnostic methods of bruxism, to provide an appropriate information about various treatment in clinical situation, and to evaluate the effect and the usefulness of those methods. There is no certain remedy for bruxism that is a technically efficient and definitely reliable diagnosis and treatment. So, the primary purpose is to prevent the oral and maxilofacial tissue injuries from bruxism and to relieve the pain and symptom. Therefore, Combining various reversible treatments together, such as behavior modification, Oral appliances therapy and physiotherapy, is recommended. For a bruxism treatment in dental field, more researches about the factors influencing on diagnosis and cure are necessary.

• Journal of TMJ Balancing Medicine
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• v.4 no.1
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• pp.8-11
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• 2014

A 27 year-old male patient with sleep bruxism-induced temporomandibular pain was managed by appliance of FCST with 3 weeks of duration, combined with acupuncture. After being treats for 3 weeks, the patient's pain was improved. Assessment was made by self assessment (Numerical Rating Scale, NRS; Korean Oral Health Impact Profile, KOHIP) and clinical observation. An impressive effect was observed and further clinical and biological research on FCST is expected.

• Journal of Oral Medicine and Pain
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• v.32 no.3
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• pp.337-346
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• 2007

This study aimed to evaluate a relation of bruxism with clinical effects of botulinum toxin type A(BTX-A) injection. 5 bruxers and 5 nonbruxers with bilateral masseter hypertrophy were participated in this study. After injecting 25 unit of BTX-A(Allergen Inc, $Botox^{(R)}$) into each masseter muscle, the thickness of masseter(Mm) and anterior temporalis(Ta) muscles was measured by ultrasonography and the maximum bite force was evaluated during a 9-month period. Self-estimation on the recovery of occlusal force during mastication was done as well. Regardless of presence of bruxsim, all subjects showed significantly reduced Ms thickness(p<0.001) and maximum bite force at $1^{st}$ molars(p=0.027) with their peak at 3 months after injection, which then started to return. No significant difference was observed in Ta thickness and the bite force at the central incisors. While self-estimated occlusal force was the least at 2 weeks after injection and then rapidly returned to the baseline level with full recovery at the time of 6 to 9 months after injection, the maximum bite force measured by bite force recorder did not recover the original value, particularly in the nonbruxer group. It is assumed that nocturnal bruxism can influence recovery of atrophic masseter and decreased occlusal force due to BTX-A injection. These findings suggest a need of occlusal appliance to control bruxism or clenching habit for longer clinical effect of BTX-A injection.