AN INFLUENCE OF OCCLUSAL PATTERN ON MASTICATORY MUSCLE ACTIVITY DURING TOOTH CLENCHING

咬合模式对咬牙过程中咀嚼肌活动的影响

• 批准号: 60480418
• 负责人: MIZUTANI HIROSHI
• 金额: $ 3.97万
• 依托单位: TOKYO MEDICAL AND DENTAL UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (B)
• 财政年份: 1985
• 资助国家: 日本
• 起止时间: 1985 至 1986
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-60480418/
• 关键词: PATTERN OF EMG; SOFTWARE OF INTEGRATED EMG ACTIVITY; TOOTH CLENCHING; CUSPID PROTECTED OCCLUSION; GROUP FUNCTIONED OCCLUSION

IT IS COMMONLY ADMITTED THAT THERE ARE TWO TYPES OF OCCLUSAL PATTERNS ACCORDING TO THE CLASSIFICATION OF TOOTH CONTACT IN LATERAL POSITION; ONE IA GROUP FUNCTIONED OCCLUSION AND THE OTHER IS CUSPID PROTECTED OCCLUSION. HOWEVER, THE ORIGIN OR DEVELOPMENT OF THESE PATTERNS ARE NOT SUFFICIENTLY DISCUSSED. THIS STUDY IS MADE TO CLEAR THE ELECTROMYOGRAPHIC DIFFERENCE OF MASTICATORY MUSCLES DURING TOOTH CLENCHING BETWEEN THESE TWO PATTERNS.TEN HEALTHY MEN, FIVE WITH GROUP FUNCTIONED (GF) AND FIVE WITH CUSPID PROTECTED (CP), RANGING 23 TO 35 YEARS OF AGE WERE CHOSEN FOR THIS STUDY. SUBJECTS REPORTED NO HISTORY OF FUNCTIONAL DISTURBANCES OF MASICATORY SYSTEM. EACH SUBJECTS WAS SEATED IN AN UPRIGHT POSITION IN A DENTAL CHAIR AND ASKED TO PERFORM SEVEN MAXIMUM COMFORTABLE CLENCHES FOR EACH TASK. THE TASKS INCLUDED CLENCHING THE TEETH IN THE INTERCUSPAL, LEFT, RIGHT, RETRUDED, AND PROTRUDED POSITION. SIX MUSCLE CHANNELS WERE AVAILABLE FOR ELECTROMYOGRAPHIC RECORDINGS. IN ALL TEN SUBJECTS, BIPOLAR SURFACE ELECTRODES RECORDED MUSCLE ACTIVITY FROM THE SUPERFICIAL MASSETER MUSCLE, ANTERIOR AND POSTERIOR TEMPORAL MUSCLES BILATERLLY. RAW DATA STORED IN A VIDEO DATA RECORDER ARE INTEGRATED WITH 300 SEC SAMPLING TIME AND ANALYZED FOR EACH GROUP. THE RESULTS ARE AS FOLLOWS;1. ACTIVITY IN THE INTERCUSPAL POSITION OF SIX MUSCLES IS THE GREATEST FOR BOTH GROUPS AND THERE IS NO SIGNIFICANT DIFFERENCE BETWEEN THEM.2. SIGNIFICANT DIFFERENCE ARE OBSERVED IN LEFT AND RIGHT LATERAL POSITION BETWEEN TWO GROUPS. IN GF GROUP, IP RATIO OF SIX MUSCLES ACTIVITY SHOWS ABOUT 0.5, WHILE IN CP GROUP SHOWS ABOUT 0.25.

根据侧位牙齿接触的分类，一般认为有两种咬合类型，一种是IA组的功能性咬合，另一种是CUSPID保护性的咬合。然而，这些模式的起源或发展却没有得到充分的讨论。本研究旨在明确这两个PATTERN患者咬牙时咀嚼肌肌电的差异。选择5名健康男性，其中5名为功能性(GF)组，5名为CUSPID保护组(CP)，年龄23~35岁。受试者没有MASICATORY系统功能障碍的病史。每个受试者都被要求以直立的姿势坐在牙科椅子上，并要求他们在每项任务中进行七次最舒适的紧握。任务包括咬合牙齿在牙槽间、左、右、后和前伸的位置。有6个肌肉通道可用于肌电记录。在所有10名受试者中，双极表面电极记录了来自咬肌浅层、前颞肌和后颞肌的肌肉活动。存储在视频数据记录器中的原始数据以300秒的采样时间进行积分，并对每组进行分析。研究结果如下：1.两组的六块肌肉在丘间位置的活动度都是最大的，两组之间没有显著差异。两组患者左右侧位比较差异有统计学意义。GF组六块肌肉活动的IP比约为0.5，IN CP组约为0.25。

项目成果

MIZUTANI, HIROSHI: "AN INFLUENCE OF OCCLUSAL PATTERN ON MASTICATORY MUSCLE ACTIVITY DURING TOOTH CLENCHING." J. OF JAPAN PROSTHODONTIC SOCIETY. 31. (1987)

MIZUTANI, HIROSHI：“咬合模式对咬牙过程中咀嚼肌活动的影响。”

水谷紘: 日本補綴歯科学会雑誌. 31. (1987)

Hiro Mizutani：日本修复医学会杂志 31。（1987）