边缘精密修整法对烤瓷冠边缘密合度影响的研究

Effect of Precision Finishing Method on the Fit of PFM Crown

目的:探讨边缘精密修整法对烤瓷冠边缘密合度影响。方法:收集各种原因拔除且牙冠完整的离体牙92颗,制作单冠修复模型,随机分成精密组和传统组,精密组在医用放大镜下完成修复体的制作过程,传统组按照常规修复体制作过程完成。分别采用探针检查法和10倍牙科实体显微镜检查修复体边缘密合度。结果:利用探针法对两组模型进行检查,精密组探针平均深度为(1.36±0.42)mm,低于传统组的(1.44±0.57)mm,但差异无统计学意义,利用10倍牙科实体显微镜进行观察时,精密组边缘密合度为(32.41±5.82)μm显著少于传统组的(43.72±6.46)μm,差异具有统计学意义(P<0.05)。结论:边缘精密修整法应用于义齿修复体制作过程中,不仅操作简单,而且可极大提高修复体边缘密合程度,减少修复后并发症的发生,有助于提高修复效果。

Objective：To explore the fit of PFM crown using precision finishing method.Methods：We collected 92 teeth,to make single crown restoration model,which were random divided into precision group and traditional group.Precision group was under the medical magnifying glass to complete restoration of the production process traditional group was according to the conventional repair system process.Probe and 10 times microscopy were used to detect the restoration margins.Results：Probe method was used on two groups of model checking.Precise set of probe was 1.36±0.42 mm,the average depth was lower than the traditional group of 1.44±0.57 mm,but there was no statistically significant difference.10 times microscope was used to observe dental entity,the precision of edge to fit was 32.41±5.82μm,which was significantly less than the traditional group of 43.72±6.46μm（P〈0.05）.Conclusion：Edge precision trimming method is applied to the denture system as a process,not only the operation is simple,and can greatly improve restoration edge seal degree,reduce the incidence of complications after repair,helps to improve the effect of repair.