纳米非晶金刚石膜对镍铬合金烤瓷修复体弯曲强度的影响

目的:探讨纳米非晶金刚石膜对镍铬合金烤瓷修复体弯曲强度的影响.方法:36个镍铬合金烤瓷试件随机分为6组(n=6),其中5组的整个试件的表面分别镀覆非晶金刚石膜厚为20nm、40nm、60nm、80nm、100nm,对照组不镀膜;按照ISO9693-1标准的三点弯曲法测试试件的弯曲强度.结果:镀膜后镍铬合金烤瓷试件的弯曲强度分别是:20nm组为60.84 ±6.75MPa、40nm组为79.16±9.82MPa、60nm组为86.23±11.43MPa、80nm组为81.40±9.69MPa、100nm组为64.56±7.07MPa,未镀膜组为46.15±5.53MPa.结论:镍铬合金烤瓷复合体的整个试件经镀覆纳米非晶金刚石膜后其弯曲强度显著增加;镀膜时选择40-80nm的膜厚可以获得较高的弯曲强度.

Effect of nanometer amorphous diamond film on bending strength of porcelain fused to Ni-Cr alloy

Objective： To investigate the effect of nanometer amorphous diamond film on bending strength of porcelain fused to Ni-Cr alloy.Methods： Thirty-six porcelain fused to Ni-Cr alloy specimens were randomly divided into six groups（n=6）.Five groups specimens were deposited nanometer amorphous diamond film and the thickness of the film were 20nm,40nm,60nm,80nm,100nm,respectively.Specimens in the control group had not been deposited film.The bending strength of specimens were measured by a three-point bending test according to ISO 9693-1.Results： The bending strength of group 20nm,40nm,60nm,80nm,100nm and control were 60.84±6.75MPa,79.16±9.82MPa、86.23±11.43MPa,81.40±9.69MPa,64.56±7.07MPa,46.15±5.53MPa respectively.Conclusions： The bending strength of porcelain fused to Ni-Cr alloy complex would increase notably after they were deposited nanometer amorphous diamond film.It could get a higher bending strength when the thickness of deposited film were 40-80nm.