No abstract available.
Brain ; Brain Injuries ; Bruxism

OBJECTIVETo study the short-term effects of nociceptive trigeminal inhibitory tension suppression system (NTI-tss) and occlusal stabilization splint (OS) on sleep bruxism patients.

METHODSTen patients received the two splint treatments in a randomized cross-over fashion: An NTI-tss and an OS for a 1-week period, respectively. Record the bruxism episodes per hour, micro-arousals per hour of the patients before wearing the splints (baseline), the first night and 1 week after wearing the splints with polysomnography. Statistical analysis was performed with SAS 9.1 by means of mixed effect model analysis.

RESULTSThere were no differences among the micro-arousal index of the baseline, the first night and 1 week later with both types of the splints (P>0.05). The NTI-tss was associated with a significant reduction in bruxism index compared with baseline. The bruxism index of baseline, the first night and 1 week later were 7.50 +/- 1.11, 3.45 +/- 1.22, and 3.51 +/- 1.03 per hour(the first night vs baseline, t=26.52, P<0.01; 1 week vs baseline, t=26.12, P<0.01). There were also significant differences in the bruxism index after wearing the OS. The bruxism index of baseline, the first night and 1 week later were 7.44 +/- 1.23, 2.97 +/- 0.91 and 6.43 +/- 1.02 per hour(the first night vs baseline, t=16.79, P<0.01; 1 week vs baseline, t=3.79, P<0.01). Compared with the NTI-tss group, the reduction was much less, especially 1 week later.

CONCLUSIONBoth the NTI-tss and the OS splints can reduce the bruxism index, and have no affect the incidence of micro-arousal. In this short term study, the NTI-tss was more effective than the OS for the treatment of sleep bruxism.

Bruxism has been defined as an oral parafunctional activity characterized by clenching, bracing, gnashing and grinding of teeth while asleep and or awake. While bruxism has been associated with a number of neurological diseases, it has been mostly highlighted following drug medication. We report 2 female patients of awake bruxism after citalopram medication. The bruxism in these patients was completely or significantly improved after cessation of citalopram. We discuss the pathophyisological mechanism of bruxsm associated with selective serotonin reuptake inhibitors (SSRIs). These cases highlight that bruxism can occur in response to citalopram, as do in other SSRIs.
Braces ; Bruxism* ; Citalopram* ; Female ; Humans ; Serotonin Uptake Inhibitors ; Tooth

PURPOSE: Occlusal splints are commonly used to prevent tooth wear caused by bruxism. However, the effects of splints on occlusion are still unclear. Although it is rarely alluded in literature, splints can provoke severe occlusal alterations and other complications. This study was aimed to identify differences in the responses of individuals with bruxism and healthy individuals to a full-arch maxillary stabilization splint in terms of occlusal changes. MATERIALS AND METHODS: Occlusal contacts in 20 (5 male, 15 female) bruxism patients and 20 (5 male, 15 female) controls with normal occlusion were evaluated before and after occlusal splint therapy. T-Scan III, a computerized occlusal analysis system, was used to simultaneously measure occlusion and disclusion times as well as left-right and anterior-posterior contact distributions before splint therapy and 3 months after therapy. Wilcoxon and Mann-Whitney U tests were used for statistical analyses (alpha=.05). RESULTS: No differences were found in the posterior contact of bruxism patients before and after stabilization splint treatment. However, differences in posterior contact were observed between bruxists and normal individuals prior to treatment, and this difference disappeared following treatment. CONCLUSION: The results of this study showed the use of a stabilization splint may not have an effect on occlusion. However, the area of posterior occlusal contact among bruxists was found to be greater than that of normal individuals. According to this study, the clinical use of splints may be harmless.
Bruxism ; Humans ; Male ; Occlusal Splints ; Splints ; Tooth Wear

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.
Anxiety ; Bite Force ; Botulinum Toxins* ; Bruxism* ; Checklist ; Depression ; Humans ; Hypertrophy*

OBJECTIVE: To establish a complete workflow of digital design and manufacturing occlusal splint for sleep bruxism, which can be preliminarily applied in clinical use, thus observe the clinical efficacy. METHODS: Twenty-four patients with sleep bruxism were recruited in the study and randomly divided into two groups by using random number tables. Digital-occlusal-splint (experimental group) treatment plan and traditional-occlusal-splint (control-group) treatment plan were carried out for each group, respectively. For experimental group, digital models of patients' both dental arches and the occlusion relationship after elevation were captured using an intraoral scanner. The occlusal splint was carried out by computer aided design/computer aided manufacturing (CAD/CAM), including splint designing and milling. For control group, the traditional soft occlusal splint was fabricated by vacuum laminator. The two kinds of occlusal splints were tried in the patients from each group, and the occlusal contacts were tested respectively by T-scan analysis system, which recorded the changes of occlusal indicators in the two groups. The retention, appearance and occlusal comfort degree were evaluated by the two groups of patients. Mann-Whitney test was performed with IBM SPSS 20.0 software, and bilateral test was performed. P<0.05 was considered to be statistically significant. RESULTS: The complete workflow of digital design and manufacturing occlusal splint was successfully established. During the clinical use, there was no statistical difference in the retention evaluation of two kinds of occlusal splints between the two groups of patients (Z=-0.538, P=0.590). The appearance score (Z=2.038, P=0.042) and the occlusal comfort score (Z=-2.579, P=0.010) of the experimental group were higher than those of the control group, with statistically significant differences. The T-scan analysis results showed that only the second molar on both sides of the traditional occlusal splint had occlusal contact in intercupsal position, while the digital occlusal splint had stable and bilaterally balanced contact between the maxillary and mandibular teeth. Furthermore, the occlusal force was uniformly distributed in the experimental group. CONCLUSION The complete workflow of digital occlusal splint improves the occlusal design, greatly simplifies and optimizes the traditional process of making occlusal splint. This new method is resource-saving and environmental-friendly, and it is able to serve patients more conveniently and efficiently.
Dental Arch ; Dental Occlusion ; Humans ; Occlusal Splints ; Sleep Bruxism ; Workflow

Bruxism is defined as 'diurnal or nocturnal parafunctional activity including clenching, bracing, gnashing, and grinding of the teeth'. Bruxism and clenching are two of the most common contributing factors in patients with temporomandibular disorders and craniofacial pain disorders. Even though many studies report the high prevalence of bruxism, its cause is still not clear. Occlusal interference has been regarded as a major etiologic factor. Nowadays, psychological stress and sleeping disorders are generally regarded as major possible etiologic factors. More than likely, the cause is multifactoral and overlapping, which makes it difficult for the practitioner to apply comprehensive and effective management strategies. Although dentists and psychologists generally believe that effective treatment is best achieved with a better understanding of the etiology of a given disorder, for now treatment for this type of disorder must proceed without a clear understanding of etiology. To overcome this obstacle, evidence-based comprehensive management protocols based on accumulated scientific findings should be provided. In this presentation, epidemiology, etiology, and the characteristics of bruxism are reviewed. Diagnostic procedures and management strategies focused on occlusal appliances and behavioral approaches are also discussed.
Braces ; Bruxism* ; Dentists ; Diagnosis* ; Epidemiology ; Facial Pain ; Humans ; Prevalence ; Psychology ; Stress, Psychological ; Temporomandibular Joint Disorders

A finite element model of the temporomandibular joint (TMJ) and the human mandible was fabricated to study the effect of abnormal loading, such as awake and asleep bruxism, on the articular disc. A quasilinear viscoelastic model was used to simulate the behaviour of the disc. The viscoelastic nature of this tissue is shown to be an important factor when sustained (awake bruxism) or cyclic loading (sleep bruxism) is simulated. From the comparison of the two types of bruxism, it was seen that sustained clenching is the most detrimental activity for the TMJ disc, producing an overload that could lead to severe damage of this tissue.
Bruxism ; physiopathology ; Elasticity ; Finite Element Analysis ; Humans ; Temporomandibular Joint ; physiopathology ; Viscosity

Bruxism ; diagnosis ; therapy ; Dental Occlusion ; Humans ; Temporomandibular Joint Disorders ; diagnosis ; therapy ; Tooth Diseases ; diagnosis ; therapy

This study tried to find the prevalence and distribution of temporo-mandibulr disorders(TMD) for workers (employee) in Seoul area to investigate the correlation between TMD and possible etiological factors such as general muscle and joint symptoms, headache, unilateral chewing and parafunction. This study was an epidemiological investigation of answers obtained from 282 persons by questionaire from Aug. 1995 to Nov. 1995. The major findings from the questionaire were as follows. (1) 43.26% of the subjects(282 persons) has TMD. (41.88% of man and 43.26% of women) (2) The more often people have general muscle and joint symptoms and -headache, the more susceptible they are to TMD. Their correlation was very significant(p<0.001). (3) The more people have bad oral habits such as bruxism, clenching and biting habit, the more likely they have TMD. The more sensitive people are to stress, the more frequently they have bad oral habits such as bruxism, clenching and biting habit. (4) Unilateral chewing has higher TMD index than bilateral chewing. There is no relationship between ache areas and TMD index.
Bruxism ; Epidemiology* ; Headache ; Humans ; Joints ; Mastication ; Prevalence ; Seoul* ; Temporomandibular Joint Disorders