CAJ | 학술논문

背景:近年来,新型热凝基托树脂可以采用快速方法进行聚合,这种快速聚合的方法对热凝基托树脂力学性能及微观结构有什么影响?目的:观察快速和传统方法聚合热凝基托树脂后其力学性能的变化.方法:实验分为两组,实验组为热凝基托树脂经过快速方法聚合,对照组为热凝基托树脂传统方法聚合,两种方法聚合的基托树脂试样在材料试验机上对其冲击强度、弯曲强度、弹性模量和布氏硬度进行测定,并对断面进行扫描电镜观察.结果与结论:快速聚合基托树脂和传统聚合基托树脂的冲击强度分别为(6.73±1.23),(7.35±0.93)kJ,mm~3;弯曲强度为(89.93±12.92),(90.19±6.88)MPa;弹性模量为(2.2±0.2),(2 4±0 1)GPa,布氏硬度为(2070±2.89),(19.57±1 05)kg,mm~2,其各项力学性能差异无显著性意义(P>0.05);扫描电镜观察不同方法聚合的基托树脂断面的微观结构也比较相似.提示基托树脂的力学性能和微观结构不受不同聚合方法的影响.
배경:근년래,신형열응기탁수지가이채용쾌속방법진행취합,저충쾌속취합적방법대열응기탁수지역학성능급미관결구유십요영향?목적:관찰쾌속화전통방법취합열응기탁수지후기역학성능적변화.방법:실험분위량조,실험조위열응기탁수지경과쾌속방법취합,대조조위열응기탁수지전통방법취합,량충방법취합적기탁수지시양재재료시험궤상대기충격강도、만곡강도、탄성모량화포씨경도진행측정,병대단면진행소묘전경관찰.결과여결론:쾌속취합기탁수지화전통취합기탁수지적충격강도분별위(6.73±1.23),(7.35±0.93)kJ,mm~3;만곡강도위(89.93±12.92),(90.19±6.88)MPa;탄성모량위(2.2±0.2),(2 4±0 1)GPa,포씨경도위(2070±2.89),(19.57±1 05)kg,mm~2,기각항역학성능차이무현저성의의(P>0.05);소묘전경관찰불동방법취합적기탁수지단면적미관결구야비교상사.제시기탁수지적역학성능화미관결구불수불동취합방법적영향.
BACKGROUND: Novel denture base resin can be polymerized rapidly. However, the effect of this method on resin mechanical performance and microstructure remains unclear.OBJECTIVE: To observe the effects on the mechanical properties of denture base resin polymerized by different methods. METHODS: The denture base resin of experimental and control groups were respectively polymerized by rapid or traditional methods. The impact strength, flexural strength, elastic modulus and Brinell hardness of two groups were measured. The cross-sections of different resin samples were detected by scanning electron microscopy.RESULTS AND CONCLUSION: The impact strength of resin were (6.73 1.23) and (7.35 0.93) kJ/mm~3, the flexural strength were (89.93 12.92) and (90.19+6.88) MPa, the elastic modulus were (2.2 0.2) and (2.4 0.1) GPa, and the Brinell hardness were (20.70 2.89) and (9.57 1.05) kg/mm~2, respectively in experimental and control groups. All data of two different groups were not statistically significant (P > 0.05). Microstructures of cross-sections of two different groups observed by scanning electron microscopy were also similar. The mechanical properties and the microstructures of the denture base resin were not affected by different polymerization methods.