铣削、3D打印和传统聚甲基丙烯酸甲酯的断裂韧性比较与评估：一项研究。
Comparison and Evaluation of Fracture Toughness of Milled, 3D-Printed, and Conventional Polymethyl Methacrylate: An Study.
作者信息
Adsare Prashanti, Patil Amit, Raj Pooja, Puranik Shivakumar, Menga Rajesh, Rajendra Koineni
机构信息
Department of Prosthodontics and Implantology, H.K.E.S' S. Nijalingappa's Institute of Dental Sciences and Research, Kalaburagi, Karnataka, India.
出版信息
J Pharm Bioallied Sci. 2024 Feb;16(Suppl 1):S484-S487. doi: 10.4103/jpbs.jpbs_819_23. Epub 2024 Feb 1.
INTRODUCTION
Dentures aim to replicate natural dentition's esthetics and functions as much as possible. With computer-aided design/computer-aided manufacturing (CAD/CAM) technology, dentistry had a new renaissance with workflow and materials.
AIM
The aim is to compare the fracture toughness of the milled, 3D-printed, and conventional polymethyl methacrylate (PMMA) to those processed conventionally.
MATERIALS AND METHODS
10 CAD MILLED PMMA BLOCKS, 10 3D PRINTED PMMA BLOCKS, and 10 CONVENTIONAL (HEAT CURE) PMMA BLOCKS.
RESULTS
A significant difference was seen in the mean flexural module when compared among three study groups as < 0.05. It was found to be maximum in CAD/CAM PMMA, followed by conventional heat cure and 3D-printed PMMA.
CONCLUSION
Formlabs and Dentca (3D-printed) were significantly weaker in fracture toughness compared to Leucitone 199 (conventional) ( < 0.05). Leucitone 199 (conventional) was significantly weaker in fracture toughness compared to Avadent (CAD CAM) ( < 0.05).
引言
假牙旨在尽可能复制天然牙列的美学和功能。随着计算机辅助设计/计算机辅助制造（CAD/CAM）技术的出现，牙科在工作流程和材料方面迎来了新的复兴。
目的
目的是比较铣削、3D打印和传统聚甲基丙烯酸甲酯（PMMA）与传统加工的材料的断裂韧性。
材料和方法
10个CAD铣削PMMA块、10个3D打印PMMA块和10个传统（热固化）PMMA块。
结果
三个研究组之间比较时，平均挠曲模量存在显著差异，P<0.05。发现CAD/CAM PMMA中最高，其次是传统热固化和3D打印PMMA。
结论
与Leucitone 199（传统）相比，Formlabs和Dentca（3D打印）的断裂韧性明显较弱（P<0.05）。与Avadent（CAD CAM）相比，Leucitone 199（传统）的断裂韧性明显较弱（P<0.05）。
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