热固化丙烯酸树脂和3D打印义齿基托树脂的弯曲强度与冲击强度——一项体外对比研究。
Flexural strength and impact strength of heat-cured acrylic and 3D printed denture base resins- A comparative in vitro study.
作者信息
Chhabra Mayank, Nanditha Kumar M, RaghavendraSwamy K N, Thippeswamy H M
机构信息
Department of Prosthodontics, JSS Dental College and Hospital, JSS Academy of Higher Education and Research, Mysuru, Karnataka, 570015 , India.
Department of Public Health Dentistry, JSS Dental College and Hospital, JSS Academy of Higher Education and Research, Mysuru, Karnataka, 570015 , India.
出版信息
J Oral Biol Craniofac Res. 2022 Jan-Feb;12(1):1-3. doi: 10.1016/j.jobcr.2021.09.018. Epub 2021 Oct 1.
OBJECTIVE
The present study aimed to evaluate and compare the flexural strength and impact strength of heat-cured acrylic/Polymethyl methacrylate (PMMA) denture base resin and 3D printed denture base resin.
METHODS
60 rectangular specimens were fabricated from conventional heat-cured acrylic and 3D-printed denture base resins. 15 specimens each of heat-cured acrylic and 3D printed denture base resin were tested for flexural strength and impact strength. The flexural strength was assessed using three point bend test while impact strength was assessed by Izod impact test.
RESULTS
The mean flexural strength of heat-cured acrylic resin was 92.01 ± 12.14 MPa and 3D printed denture base resin was 69.78 ± 7.54 MPa. The mean impact strength of heat-cured acrylic resin was 1.67 ± 0.79 kJ/m and 3D printed denture base resin was 1.15 ± 0.40 kJ/m.The differences in mean impact and flexural strength between heat-cured acrylic and 3D printed denture base resins were statistically significant.
CONCLUSION
Heat-cured acrylic denture base resin (DPI heat-cure) had greater flexural and impact strength than 3D printed denture base resin (Next Dent denture 3D+).
目的
本研究旨在评估和比较热固化丙烯酸/聚甲基丙烯酸甲酯（PMMA）义齿基托树脂与3D打印义齿基托树脂的弯曲强度和冲击强度。
方法
用传统热固化丙烯酸树脂和3D打印义齿基托树脂制作60个矩形试件。热固化丙烯酸树脂和3D打印义齿基托树脂各15个试件分别进行弯曲强度和冲击强度测试。弯曲强度采用三点弯曲试验评估，冲击强度采用悬臂梁冲击试验评估。
结果
热固化丙烯酸树脂的平均弯曲强度为92.01±12.14MPa，3D打印义齿基托树脂的平均弯曲强度为69.78±7.54MPa。热固化丙烯酸树脂的平均冲击强度为1.67±0.79kJ/m，3D打印义齿基托树脂的平均冲击强度为1.15±0.40kJ/m。热固化丙烯酸树脂与3D打印义齿基托树脂的平均冲击强度和弯曲强度差异具有统计学意义。
结论
热固化丙烯酸义齿基托树脂（DPI热固化型）比3D打印义齿基托树脂（Next Dent义齿3D+型）具有更高的弯曲强度和冲击强度。
Zotero 插件