Clenchingに関する臨床的研究 : 頬圧の測定と頬粘膜の歯列圧痕

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Trauma from occlusion has been considered an important factor of periodontal disease. Tooth clenching which closes the jaws involuntary under heavy pressure is recognized to produce a great destructive force. We must correctly judge whether patients have the habit of clenching for treatment of periodontal disease. However, patients are usually unware of the habit and dental science has not yet developed accurate creteria for diagnosis of clenching as of the present moment. The purpose of this study was to relate the cheek pressure, cheek indentation, and EMG of masseter muscle for clarifying the subject of clenching. The experiments were carried out on 7 subjects from 28 to 45 years. When clinically examined, they seemed to have the habit of clenching, and tooth indentation was recognizable on cheek mucosa. Buccal pressure in the upper first molar and premolar region, and electrical activity of the masseter muscle were messured at: (1) rest, (2) saliva swallow, (3) water swallow, (4) voluntary clenching (closing the jaws voluntarily), and (5) emotional stress. The results and conclusion were as follows: (1) At rest; increase of cheek pressure was recognized during involuntary swallow, but occasionally between each involuntary swallows. (2), (3) During saliva and water swallow (voluntary swallow), cheek pressure was appreciably increased in all subjects. (4) During voluntary clenching, electrical activity of the masseter muscle was recognizable, but cheek pressure was not remarkably increased. (5) During emotional stress, cheek pressure increased more than rest in four subjects. These phenomena seems to be identifiable in the tension of the orofacial muscles by emotional stress.
特定非営利活動法人日本歯周病学会の論文
1978-06-28

Clenchingに関する臨床的研究 : 頬圧の測定と頬粘膜の歯列圧痕

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