مقارنة الانطباق الحفافي لمعدن التيتانيوم مع خليطة معدنية غير ثمينة و اثر خبزالخزف على هذا الانطباق

A stainless steel model was made as a tooth prepared with a chamfer margin. Twenty caps of wax of the same thickness were designed upon this model. Ten samples of this wax cap were molded into commercially pure Titanium, and another ten samples were molded into a metallic Ceraplus. Four measuring points were specified at the center of each of the tooth's surfaces. The measuring was made by a microscope equipped with a camera that has a measuring accuracy of up to 0,5 micron. The results showed different values ranging between 14 and 154 micron in the marginal fit; the medium values were taken for each set of these measures. Titanium proved to be the best for marginal fit. It was also shown that firing ceramics on both metals increased the marginal discrepancies in both cases, but to a lesser extent in the case of commercially pure Titanium