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近年来,由于齿科高级粘结剂的出现与应用,作者设计了一种几乎不用磨牙的“粘结桥”并从其基础实验与临床的研究,证实了在临床应用的可能性。现就其基础理论部分概述如下。一、粘结桥的组成粘结桥 1.粘结剂 2.被粘体1.牙质(釉质和牙本质) 2.金属(种类及处理方法) 1.粘结剂的要求要求其物理化学性能优越,适应口腔中的复杂条件,不具有吸水性与溶解性,并易于操作。 2.牙面处理对釉质进行磷酸酸蚀处理时,为防止残存脱钙物的沉淀应彻底将其清除,可用不含氟化物的浮石材料进行表面磨光充分清洗,并确实按照酸蚀规定时间进行严格操作。根据试验比较,釉质表面不作磨除的经酸蚀后其粘结强度比作磨除的粘结强度高,抗张强度,前者为250kg/cm~2,后者为187kg/cm~2。因此应尽量避免对牙面进行浅而广的大面积磨削,以求得较高的粘结强度。
In recent years, due to the advent and application of advanced dentistry adhesives, the authors designed a “bond bridge” that used almost no molars, and from its basic experimental and clinical studies, confirmed the possibility of clinical application. The basic theory section is summarized below. First, the composition of the bonding bridge Bonding bridge 1. Binder 2. Is stuck 1. Dentine (enamel and dentin) 2. Metal (type and handling methods) 1. The requirements of the binder requires its physicochemical properties Superior to the complex conditions in the mouth, not absorbent and dissolvable, and easy to handle. 2. Teeth treatment When etching the enamel phosphoric acid, in order to prevent the residual decalcification precipitation should be completely removed, can be used fluoride-free pumice material for surface polishing thoroughly cleaned, and indeed in accordance with the provisions of acid etching time Strict operation. According to the experimental comparison, the bond strength of the enamel surface which is not ablated by acid etching is higher than the bond strength of ablation, and the tensile strength is 250 kg / cm ~ 2 for the former and 187 kg / cm ~ 2 for the latter. Therefore should try to avoid the shallow and wide tooth surface grinding, in order to obtain higher bond strength.