多根牙与单根牙罹患牙周病的机会略等,均可形成牙周袋,袋内细菌也无明显差异,但二者的局部解剖情况确有所不同,如多根牙分歧部一旦发生病变,往往程度较重,并呈进行性发展,易于深化,在处理时难于直视,器械也难以直达,致彻底清除根分歧之间的感染亦较为困难。故长期以来,多认为本病不易进行保存治疗而往往将患牙拔除,此乃造成磨牙寿命最短的原因之一。探讨根分歧部病变的发生、发展、临床病理特点及其防治,是延长多根牙寿命的一个值得重视的研究方向。近年来,随着对本病的认识不断加深,治疗经验不断积垒,使本病的预后有所改善。本文根据作者对一组根分 Multiple teeth and single teeth suffering from periodontal disease slightly more chance, can form a periodontal pocket, bacteria in the bag there is no significant difference, but the two local anatomy is indeed different, such as multiple teeth once the Department of differences Lesions are often severe and progressive. They are easy to be deepened, hard to look into and difficult to access directly to equipment. It is also more difficult to completely eliminate root-cause infections. For a long time, many think this disease is not easy to save the treatment and tend to be removed from the teeth, which is caused by one of the shortest life of the molar one of the reasons. To investigate the occurrence, development, clinicopathological features and prevention and treatment of root discoid lesions is a worthy research direction to extend the life of multiple teeth. In recent years, with the deepening of awareness of the disease, the accumulation of treatment experience base, so that the prognosis of the disease has improved. This article according to the author of a group of roots