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目的:比较镍铬合金、含钛的镍铬合金、钴铬合金、钯银合金和纯钛的金瓷结合强度。方法:执行ISO9693标准,采用三点弯曲试验分别测定镍铬合金、含钛的镍铬合金、钴铬合金、钯银合金、纯钛在常规热处理条件下的金瓷结合强度。结果:金瓷结合强度分别为:镍铬合金(37.82±2.72)Mpa;含钛的镍铬合金(39.23±2.45)Mpa;钴铬合金(39.06±3.41)Mpa;钯银合金(47.98±3.74)Mpa;纯钛(32.61±5.62)Mpa。镍铬合金、含钛的镍铬合金、钴铬合金组间差异无统计学意义(P>0.05),这3种合金与纯钛、钯银合金组间差异都有统计学意义(P<0.05),纯钛与钯银合金组间差异也有统计学意义(P<0.05)。结论:①镍铬合金、含钛的镍铬合金、钴铬合金金瓷结合强度相近,都大于纯钛且小于钯银合金的金瓷结合强度。②镍铬合金、含钛的镍铬合金、钴铬合金、钯银合金和纯钛的金瓷结合强度都大于25 Mpa,按ISO9693标准均可应用于临床。
Objective: To compare the bonding strength between Ni-Cr alloy, Ni-Cr alloy containing Ti, Co-Cr alloy, Pd-Ag alloy and pure titanium. Methods: According to the ISO9693 standard, the three-point bending test was used to determine the bonding strength between Ni-Cr alloy, Ti-Ni-Cr alloy, Co-Cr alloy, Pd-Ag alloy and pure titanium under the conventional heat treatment conditions. Results: The bonding strength of gold-porcelain was respectively: Ni-Cr alloy (37.82 ± 2.72) Mpa; Ti-containing Ni-Cr alloy (39.23 ± 2.45 Mpa); Cobalt-chromium alloy (39.06 ± 3.41) Mpa; Pd-Ag alloy (47.98 ± 3.74) Mpa; pure titanium (32.61 ± 5.62) Mpa. There was no significant difference between nickel-chromium alloy, nickel-chromium alloy containing titanium and cobalt-chromium alloy (P> 0.05). The differences between the three alloys and pure titanium and palladium-silver alloy were statistically significant (P <0.05 ), The difference between pure titanium and palladium silver alloy group was also statistically significant (P <0.05). Conclusion: ① Ni-Cr alloy, Ti-containing Ni-Cr alloy and Co-Cr alloy have similar bonding strength, both of which are greater than that of pure titanium and less than that of palladium-silver alloy. ② nickel-chromium alloy, titanium-containing nickel-chromium alloy, cobalt-chromium alloy, palladium silver alloy and pure titanium porcelain bond strength is greater than 25 Mpa, according to ISO9693 standards can be applied to clinical.