摘要
目的:研究遮色钴铬合金桩核、氧化锆桩核、纤维桩树脂核三种牙色桩核系统氧化锆全瓷冠修复后冠边缘和内部适合性的差异,为临床桩核全瓷冠修复方法和材料的选择提供参考依据。方法:24颗离体上颌中切牙在釉牙骨质界冠方2.0mm处截冠,按临床操作程序和方法分别制作遮色钴铬合金桩核、氧化锆桩核、纤维桩树脂核各8个,均加二氧化锆全瓷冠修复。在100倍体视显微镜下,采用间隙印模测量法比较3组冠的边缘和内部间隙大小,应用SPSS 17.0软件对实验数据进行统计分析。结果:遮色钴铬合金桩核组、氧化锆桩核组、纤维桩树脂核组锆瓷冠的边缘间隙测量结果分别为(96.98±3.51)、(62.34±3.22)、(59.00±3.96)μm。内部间隙为(95.71±2.52)、(73.14±2.04)、(68.52±4.08)μm。遮色钴铬合金桩核组的边缘间隙及内部间隙与氧化锆桩核组、纤维桩树脂核组间差异均有统计学意义(P<0.05),氧化锆桩核组与纤维桩树脂核组之间边缘及内部间隙差异均无统计学意义。结论:3种桩核方法上制作的氧化锆全瓷冠边缘适合性均在临床可接受范围内,但采用氧化锆桩核、纤维桩树脂核制得的全瓷冠其边缘适合性更接近美国牙科协会标准,更值得推广应用。
Objective：To study the marginal and internal fit of all-ceramic crowns on three different tooth-colored post-cores.Methods：A total of 24 intact extracted teeth were selected and excised at 2mm crows from cemento-enamel junction.Eight of color-masking Co-Cr post-cores,zirconium post-cores,and fiber-resin post-cores were separately made according to the clinical operation procedures and methods.The marginal and internal fit of these groups were measured and recorded using a measuring microscope by silicone rubber gap impression.Statistical analysis was performed with SPSS 17.0software.Results：The depths of marginal fit of the colormasking Co-Cr post-cores,zirconium post-cores,and fiber-resin post-cores were 96.98±3.51,62.34±3.22,and 59.00±3.96μm,respectively.The depths of internal fit were 95.71±2.52,73.14±2.04,and 68.52±4.08μm,respectively.A significant difference was observed in the marginal and internal fit of the color-masking Co-Cr post-cores and the other groups（P〈0.05）.No statistically significant difference was observed in the marginal and internal fit of the zirconium post-cores group and fiber-resin post group.Conclusion：The marginal fit of all ceramic crowns are clinically acceptable using three post-core methods.The marginal adaptation of zirconium post-cores and fiber-resin post-cores were more closed to America Dental Association standards.
出处
《口腔医学研究》
CAS
北大核心
2017年第4期432-435,共4页
Journal of Oral Science Research
基金
珠海市科技计划项目(编号:20161027E030049)
