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影响全冠固位的因素之一是粘固剂在预备体上的覆盖程度。作者检测了全冠下磷酸锌粘固剂的不同覆盖程度及其对固位的影响,并由此推荐较好的粘固方法。作者制作了60个相同的黄铜代型,每个代型均加工成磨牙的全冠预备体形态。轴壁聚合度为6度,颈缘采用圆槽型。代型表面经过抛光,以保证粘固时粘固剂的流动不受干扰。在每个代型上都制作一个透明的丙烯酸树脂冠。 60个代型被分为6组,每组10个。①粘固剂仅涂于冠内面颈缘处,②粘固剂涂于冠内面轴壁近根方和一半,③粘固剂涂于冠内面所有轴壁上,但(牙合)面不涂,
One of the factors affecting crown retention is the degree of coverage of the cement on the preparation. The authors examined the different degrees of coverage of the zinc phosphate cement under the crown and its effect on retention, and recommended a better method of cementing. The author produced 60 identical brass castings, each of which was machined into a full crown preparation of molars. Degree of polymerization of the shaft wall of 6 degrees, with a circular groove on the neck edge. The surrogate surface is polished to ensure that the cements do not interfere with the flow of cement. Make a transparent acrylic crown on each generation. 60 generations were divided into 6 groups of 10. ① cements only applied to the crown inside the neck edge, ② cement applied to the crown root shaft near the root and half, ③ cements applied to the crown on all the shaft wall, but (occlusal) surface is not coated ,