牙周病的病因及发病机病机制至今尚不十分清楚,但局部刺激因素,尤其是创伤性合在诱发和加重牙周病的发展方面起着主要作用,早在1894年Karolyi首先提出了创伤性合是牙周病的病因,1951年Gratzinget指出在安氏Ⅰ类Ⅱ类错合中,复合的作用可以造成前牙区侧向力过大,而呈现出牙周病。其原因是当口腔内牙齿位置不正常而出现错合畸形时,一方面造成咀嚼运动时食物的生理性流动受阻,影响了对牙周组织的正常生理刺激,而且自洁作用差,刷牙不全,易于菌斑、软垢、牙石的沉积。另方面,由于牙齿接触不良,造成合力不平衡,致使部份 The etiology and pathogenesis of periodontal disease is not yet clear, but local stimuli, especially traumatic, play a major role in inducing and aggravating the development of periodontal disease. As early as 1894, Karolyi first proposed the trauma Sexual joint is the cause of periodontal disease, 1951 Gratzinget pointed out that in Class Ⅰ Class Ⅱ misclassification, the role of composite can cause excessive lateral force anterior teeth area, showing a periodontal disease. The reason is that when the position of the teeth in the mouth is not normal and there is a mismatch, on the one hand, the physiological flow of the food during the chewing movement is blocked, affecting the normal physiological stimulation of the periodontal tissue, and the self-cleaning effect is poor, Easy to plaque, soft dirt, deposition of calculus. On the other hand, due to poor tooth contact, resulting in a combination of unbalanced, resulting in some