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什麽情況下更適合覆蓋義齒修復

Publicado por vickong pun     6 de julio de 2021    

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什麽情況下更適合覆蓋義齒修復

 什麽情況下更適合覆蓋義齒修復?什麽情況下更適合覆蓋義齒修複因齲病、嚴重磨耗等原因導致牙冠大部分缺損或變短,或口內余留牙伸長、低位、過度傾斜、錯位等,都可以進行覆蓋義齒修複,特別是當余留牙的牙根情況較差,若用其他修複方法,剩余牙齒會受到進一步的損害,這時可首先考慮將牙冠截除、根管充填後進行覆蓋義齒修複。選留的牙齒或牙根最好位于牙弓的兩側,這樣利于義齒的平衡與穩定,對于全口覆蓋義齒,如果選留的牙齒或牙根位于牙弓前後、左右,則修複效果最爲理想。一般來講,尖牙是經常被保留下來的牙齒,因該牙的牙根較長且粗大,通常較晚脫落;其位置也很重要,位于口角處,對面形有支撐作用;並且牙槽嵴的前部比後部更易吸收,尖牙的保留可有效減緩這種吸收。另外,牙床最後端的牙齒或牙根保留下來也較爲有利,因爲這樣的牙齒或牙根留下後,在咀嚼時可對抗義齒遊離端下沈,既保護了近中基牙,不使其受到過大的向遠中傾斜的扭力,又可減輕缺牙區軟組織和牙槽骨所承受的壓力。在覆蓋基牙的數量上無嚴格要求,如果牙的條件合適,即使只剩余1~第2顆牙,也應盡量保留。

                    

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