| Bruxism is contact of the upper and lower teeth unrelated to eating, including clenching, gnashing, grinding, and tapping, which can occur diurnally or nocturnally. It can lead abnormal tooth wear, hypertophy of the masticatory muscles, temporomandibular joint disorders, damage to structures surrounding the teeth such as the gums, various facial pains, muscle and tooth sensitivity, and headaches. Although the cause of this disease is inconclusion at present, it has already caused the extensive concern of relevant scholars, such as psychology, endocrine, stomatology, etc. The scholars extensively studied the electroencephalogram (EEG) of the sleep physiology of this disease. Reading (1966) and Clarke (1981) found that bruxism is mainly appearing in REM (Rapid eye movement).The result of study of Slaton (1983) indicates that bruxism can appear in any sleep stage without any rhythm. The research of Robinson reports that the emergence of grinding one's teeth relates to arousing in sleep, it is apt to appear when the sleep lightens. But the research on the differences between the patient and the normal person in sleep structure has seldom been studied yet.In order to further sleep state, the symptom in different stage of sleep, the relations between the symptom sleep posture during the patient's grinding his teeth, the difference of rhythmic masticatory muscle activity(RMMA) between the patient and the control group, the author studied 6 patients before and after splint treating, 8normal person as the control group objects. The analysis on experimental result is divided into two parts:1. Analysis on polysomnographic between SB patient and the control groupPurpose : Through the whole night monitoring of the patient and the normal person, analyzed every sleep parameter comparatively and study the differences between the patient and the normal person in the symptom in different stage of sleep, the centre nerve mechanism of this disease, the relations between the symptom and sleep posture, the number of RMMA. Method: polysomnographic on one whole night monitoring of 6 patients and 8 normal persons. Analyzed every sleep parameter, RMMA and study their sleep body posture while the patients grinding their teeth. Result: 1.Compared with normal person , the study shows obvious differences that the patient's REM time relatively longer, and the sleep percentage higher; 2. bruxism symptom scattered at each stage of sleep; 3. There were two SB patients slept by the left recumbent position while their right canines have severity wear , three SB slept by the right lateral decubitus while their left canines have severity wear , one SB slept by supinate while his labial teeth and buccal teeth all had severity wear ; 4. RMMA per hour of the patient is 6 times of control group. Conclusion: 1. the patient's REM time obviously longer than the control person's time; 2.the emergence of the symptom happens during any sleep stage; 3.the symptom has relations with sleep body posture; 4.the patient has 6 times of RMMA than normal person, obviously higher than normal person.2. Polysomnographic analysis between before and after 4-week splint treatmentPurpose: To analyze the changes of every sleep parameter and EMG and the curative effect after 4-week stabilization splint treatment. Method: polysomnography on one whole night monitoring of 6 patients for 4 weeks after stabilization splint treatment. Result: 1. REM time is still relatively longer and percentage of sleep higherafter treating. 2. The time and frequency of the symptom obviously reduce. And the symptom scatters at each stage of sleep; it has relations with sleep body posture. 3. RMMA is 3 times of the normal person group per hour at the time of patient's sleep of SB after treating (P <0.01). Conclusion: 1. the patient's REM time relatively longer than normal person's; 2. the symptom has relation with sleep body posture; 3. the heal effect of stabilization splint treatment is obvious, SB symptom and RMMA decreased after treating.The present study proved the conclusi... |
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