传统、CAD/CAM和3D打印技术制备临时冠的抗断裂性能

Ola A. Sakr, M. Mandour, Zahraa Gabal
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引用次数: 0

摘要

目的:本研究的目的是比较传统手工工艺、CAD/CAM铣削和3D打印技术制造的临时修复体的抗骨折性。材料与方法:用环氧树脂制备了1个人上第一前磨牙,并进行了复制,共制作了21个模具。据此,共制作(N=21)个临时冠。将构建的临时修复体按照构建方法分为3组(每组7个),第一组:采用传统手工方法构建临时冠,第二组:采用CAD/CAM铣削技术构建临时冠,第三组:采用3D打印技术构建临时冠。使用CharmTemp ZONE临时粘固剂将所有临时冠与相应的环氧树脂模具粘接,并进行模拟大约一个月临床情况的热循环程序。统计分析显示,CAD/CAM样品(2组)的断裂抗力均值最高(910.20±118.95),3D打印样品(3组)次之(720.80±129.57),常规样品(1组)的断裂抗力均值最低(626.71±103.23),具有统计学意义。ANOVA检验显示3D打印样品(3组)与常规样品(1组)之间无显著差异。结论:CAD/CAM临时冠的强度优于3D打印和常规冠。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Fracture Resistance of Provisional Crowns Fabricated by Conventional, CAD/CAM, and 3D Printing Techniques
Purpose: The aim of this study was to compare fracture resistance of provisional restorations fabricated with conventional manual procedure, CAD/CAM milling and 3D Printing techniques. Materials and Methods : one human upper first premolar was prepared and duplicated using epoxy resin to produce twenty one dies. Accordingly, a total of (N=21) provisional crowns were constructed. The Constructed provisional restorations were divided into 3 groups according to the method of construction (n=7 for each group), Group 1: Provisional crowns were constructed using conventional manual technique, Group2: Provisional crowns were constructed using CAD/CAM milling technique, Group3: Provisional crowns were constructed using 3D Printing technique. All Provisional crowns were bonded to their corresponding epoxy resin dies by using CharmTemp ZONE temporary cement and subjected to thermocycling procedure simulating approximately one month of clinical situations Results: Statistical analysis showed that the fracture resistance of CAD/CAM samples (group 2), recorded the statistically significant highest mean fracture resistance value (910.20 ± 118.95), followed by 3D Printing samples (group 3) (720.80 ± 129.57), while the lowest value was recorded for Conventional samples (group 1) (626.71 ± 103.23). ANOVA test showed that there was no significant difference between 3D Printing samples (group 3) and Conventional samples (group 1). Conclusion: CAD/CAM provisional crowns have superior strength than 3D Printing and conventional crowns.
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