Jamayet Nafij Bin, Barman Aparna, Rashid Farah, Eusufzai Sumaiya Zabin, Özcan Mutlu, Dudley James, Farook Taseef Hasan
Division of Restorative Dentistry, School of Dentistry, IMU University, Kuala lumpur 57000, Malaysia.
School of Dental Sciences, Universiti Sains Malaysia, Kota Bharu, Malaysia.
Int J Dent. 2024 Aug 30;2024:2118412. doi: 10.1155/2024/2118412. eCollection 2024.
To evaluate the influence of edible liquids on the characteristic properties of 3D printable materials compared to conventionally used dental resin acrylic.
Dental polymethyl methacrylate (PMMA) specimens were fabricated from preformed molds while polylactic acid (PLA) and polyethylene terephthalate glycol (PETG) specimens were 3D printed using fused deposition modelling at 0.1 mm layer thickness. All specimen forms adhered to ISO 37:2017 and ISO 604:2002 specifications. Specimens underwent controlled immersion for 180 hr into different media (no immersion (control), oil, soda, milk, and caffeine). Changes in mass (g), plastic deformity (N/mm), ultimate tensile stress (N), flexural deformity (N/mm), and break force (N) were evaluated using analysis of variance.
There was an increase in mass for all specimens following immersion with significant interactions between immersion media and the materials. The materials exhibited significant differences in plastic deformity ( (df) = 156.632(2), < 0.001), ultimate tensile stress ( (df) = 109.521(2), < 0.001), and break force ( (df) = 319.785 (2), < 0.001) with no significant interactions with immersion media ( > 0.05) on both accounts. Materials showed no significant differences in flexural deformity ( (df) = 2.693(2), = 0.074) but with significant interactions ( (df) = 4.984(8), < 0.001) between acrylic and immersion media.
Commercially available 3D printable PLA and PETG filaments printed at 0.1 mm thickness possess approximately half the mechanical resilience as dental PMMA with comparable flexural deformity after exposure to edible liquids.
与传统使用的牙科树脂丙烯酸相比，评估食用液体对3D可打印材料特性的影响。
牙科聚甲基丙烯酸甲酯（PMMA）标本由预制模具制成，而聚乳酸（PLA）和聚对苯二甲酸乙二醇酯（PETG）标本则采用熔融沉积建模以0.1毫米的层厚进行3D打印。所有标本形式均符合ISO 37:2017和ISO 604:2002规范。将标本在不同介质（无浸泡（对照）、油、苏打水、牛奶和咖啡因）中进行180小时的受控浸泡。使用方差分析评估质量（克）、塑性变形（N/mm）、极限拉伸应力（N）、弯曲变形（N/mm）和断裂力（N）的变化。
浸泡后所有标本的质量均增加，浸泡介质与材料之间存在显著相互作用。材料在塑性变形（（自由度）=156.632(2)，<0.001）、极限拉伸应力（（自由度）=109.521(2)，<0.001）和断裂力（（自由度）=319.785(2)，<0.001）方面表现出显著差异，在这两方面与浸泡介质均无显著相互作用（>0.05）。材料在弯曲变形方面无显著差异（（自由度）=2.693(2)，=0.074），但丙烯酸与浸泡介质之间存在显著相互作用（（自由度）=4.984(8)，<0.001）。
以0.1毫米厚度打印的市售3D可打印PLA和PETG细丝在接触食用液体后，其机械弹性约为牙科PMMA的一半，弯曲变形相当。
