【摘要】 目的:评价临床铸钛义齿制作过程中的缺陷,以提高铸造成功率。方法:对328件铸钛义齿进行回顾性总结,并对其发生的铸造缺陷进行统计分析。结果:本文全部铸件中,铸造不全4件,占1.22%,31件有内部气孔,占9.4%,7件存在表面粗糙,占2.13%。在铸钛固定修复中,应用独立分铸道内部气孔发生率明显小于栅栏式铸道(x2=4.65, p<0.05)。结论:铸钛义齿存在一定比例的铸造缺陷,铸道设计是影响铸造缺陷的重要因素之一。更多还原

【Abstract】 Objective:To evaluate the reason of the cast deficiency of titanium denture, then to achieve higher successrate and to avoid inner deficiency. Methods: 328 casting of titanium dentures were studied by x-rays statistically analysed.Results:There were 4 incomplete casting dentures (1.22%), 31 cases of internal porosity (9.45%) and 7 cases of surfacerough (2.13%). The incidence of internal porosity of runner bar sprue design had less than that of individual sprue designin fixed restoration (x2=4.65, p<0.05).Conclusions: Casting titanium dentures have proper ratio of casting deficiency, inwhich the sprue design is one of the most important factor.更多还原