Impact strength of 3D printed and conventional heat-cured and cold-cured denture base acrylics.
Impact strength of 3D printed and conventional heat-cured and cold-cured denture base acrylics.
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3D 打印和传统热固化和冷固化义齿基托丙烯酸树脂的冲击强度。
DOI：
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发表时间：
2021
影响因子：
2.3
通讯作者：
J. Ontiveros
中科院分区：
文献类型：
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作者：
Jieun Lee;D. Belles;Maria Gonzalez;S. Kiat;Alba Dugarte;J. Ontiveros
目的
评价和比较3D打印树脂与常规制作的热固化和冷固化丙烯酸树脂义齿基托的冲击强度。
材料和方法
将义齿基托材料平均分为3组(n=25，n=75)：(1)三维打印材料(Denture Base LP，FormLabs)，(2)热固化型丙烯酸树脂(Lucitone 199，Dentsply Sirona)，(3)冷固化型丙烯酸树脂(Lucitone HIPA，Dentsply Sirona)。三维打印试件通过计算机辅助设计软件(Autodesk MeshMixer)设计，尺寸为mm长、12.7 mm宽、3.2 mm厚，然后用台式立体印刷机(FormLabs，FormLabs)打印。采用常规方法(压缩和浇注)制备了热固化和冷固化的丙烯酸树脂试件。冲击能量直接从冲击试验机读取，单位为焦耳，每个试件的横截面面积被用来计算冲击强度，单位为kJ/m2。进行方差分析、图基多重比较检验和似然比α=0.05。
结果
平均冲击强度热固化组为8.9kJ/m2，3D打印树脂为11.2kJ/m2，冷固化组为14.9kJ/m2。Tukey多重对比试验表明，冷固化组的冲击强度明显高于3D打印树脂组和热固化组。
结论
在本研究范围内，冷固化丙烯酸树脂(Lucitone HIPA)的冲击强度最高，其次是3D打印树脂(Denture Base LP)和传统热固化义齿基托材料(Lucitone 199)。
PURPOSE
To evaluate and compare the impact strength of 3D-printed resin to conventionally fabricated denture bases of heat-cured and cold-cured acrylic resin.
MATERIALS AND METHODS
Denture base materials were evenly divided into three groups (n = 25 each; N = 75): (1) 3Dprinted material (Denture Base LP, Formlabs); (2) Heat-cured acrylic resin (Lucitone 199, Dentsply Sirona); and (3) cold-cured acrylic resin (Lucitone HIPA, Dentsply Sirona). The 3Dprinted specimens were designed through computer-aided design (CAD) software (Autodesk Meshmixer) with the dimensions 64 mm long, 12.7 mm wide, and 3.2 mm thick, then printed with a desktop stereolithography printer (Form 2, Formlabs). Heat-cured and cold-cured acrylic resin specimens were fabricated through conventional (compression and pouring) methods. The impact energy was read directly from the impact tester in joules, and the cross-sectional area of each specimen was used to calculate the impact strength in kJ/m2. Analysis of variance, Tukey multiple comparisons test, and a likelihood ratio α = .05 were conducted.
RESULTS
The average mean impact strength was 8.9 kJ/m2 for heat-cured acrylic resin, 11.2 kJ/m2 for 3D-printed resin, and 14.9 kJ/m2 for cold-cured acrylic resin. Tukey multiple comparisons test showed that the impact strength for the cold-cured group was significantly greater than the 3D-printed resin and heat-cured acrylic resin groups.
CONCLUSION
Within the limitations of this study, the cold-cured acrylic (Lucitone HIPA) showed the greatest impact strength, followed by 3D-printed resin (Denture Base LP) and conventional heat-cured denture base materials (Lucitone 199), respectively.
影响因子：
4.6
作者：
Puri, Gaurav;Berzins, David W.;Dhuru, Virendra B.;Raj, Periathamby A.;Rambhia, Sameer K.;Dhir, Gunjan;Dentino, Andrew R.
通讯作者：
Dentino, Andrew R.