数字化与传统印模在固定修复中的对比研究

Study on the clinical effect of difference between digital and traditional impression methods for fixed restoration

目的:探讨利用数字化扫描与传统印模进行牙体缺损修复的临床应用及远期预后的对比。方法:临床纳入标准的牙体缺损病例随机分为A、B组进行烤瓷冠、全瓷冠修复;其中A组下设A-1、A-2组别,分别采用数字化扫描方法以及传统印模方式,B组同理。术中评估患者的紧张程度;术后密切随访,根据边缘密合性、牙周指数等方面进行评估及统计学分析。结果:数字化取模术中能够显著降低患者的紧张程度;修复后2年随访显示烤瓷冠修复组中:采用CAD扫描方式在边缘密合性、牙周指数等上与传统印模组具有统计学差异(P<0. 05);在全瓷修复组中无明显统计学差异(P>0. 05)。结论:数字化扫描印模相对于传统印模方式制作全冠修复体能够取得更优越的临床效果,同时能改善术中临床体验。

Objective:To compare the clinical effect and outcome of defected teeth restored with crown by digital system and traditional impression.Methods:The cases of defected teeth which meet the inclusion criteria were randomly divided into two groups,which were undergone for restoration of porcelain-fused-to-metal crown(PFM)(group A)or ceramic crown(group B).Inregard to group A,two approaches(subgroup A-1 and A-2)were conducted by the CEREC Omnicam scanning and traditional silicone rubber impression,respectively.And the same procedure was performed in group B(subgroup B-1 and B-2).Intraoperative emotion tensity was evaluated and clinical efficacy such as marginal adaptation,periodontal index was also investigated statistically.Results:Statistical significance could not be found between two ways for the ceramic crown group on the clinical effect(P>0.05),while there was a statistical significance existed in the PFM crown group(P<0.05).Moreover,it demonstrated emotion tensity could be reduced remarkably by digital impression.Conclusion:Full crown restoration by digital system could achieve good clinical results compared with traditional impression,and rehabilitation based on the digital technique showed to have an advantage over traditional ones from the aspects of clinical experience with more comfort.