中心位置咬合干擾封咬肌夜間肌活性之影響

本實驗之目的在於觀察中心位置咬合干擾對咬肌肌肉活性的影響，並且利用可攜帶式肌電圖記錄器作一個長時間的監控，比較咬肌肌肉活性於咬合干擾置入前、中、後有無差異出現，其中受測者共10位，五位男性、五位女性，平均年齡為28.1歲，咬合干擾高度為0.5mm，置入位置為下顎第一大臼齒中心窩上，時間為一個星期，實驗紀錄時段為咬合干擾黏著前，以及置入後第一天，第二天，第七天，第十四天；實驗結果發現當中心位置咬合干擾出現時，會立即造成咬肌收縮活性改變，而收縮波的變化主要出現於較低能階的改變；實驗中有9位出現活性減小，只有一位出現增加的現象，之後會因為適應而出現活性恢復的趨勢。

關鍵字

咬合干擾；肌電圖記錄器；咬肌肌肉活性

並列摘要

The aim of this study was to evaluate the influence of centric occlusal interference on masseter muscle activity. The subjects consisted of 5 women and 5 men with a mean age of 28.1 ± 2.4 years. Subjects were all in good general health and had no symptoms or signs in the temporomandibular joint. A piece of composte resin of 0.5 mm in height was placed unilaterally on the central fossa of the lower first molar for 1 week to produce centric occlusal interference. A portable EMG system was used 10 measure masseter muscle activity. The recorded EMG data were obtained before and during days 1, 2, 7, and 14 after insertion of the interference. There was a significant decrease in masseter muscle activity immediately after insertion of the interference on day 1. The altered masseter muscle activity gradually recovered from day 2. After removal of the interference on day 7, masseter muscle activity was measured again and was found to have significantly decreased. One week after removal of the interference (day 14), the muscle activity had recovered to the pre-experimental stage with no long-term symptoms. A centric occlusal interference may cause changes in the myoelectric contraction pattern of the masseter muscle. It is apparent that occlusal interferences are associated with short-term clinical symptoms and signs, but they should not have specific long-term detrimental effects.

並列關鍵字

centric occlusal interference ； portable EMG ； masseter muscle activity

國際替代計量

中心位置咬合干擾封咬肌夜間肌活性之影響

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