Soma Hiroko, Miyagawa Yukio
Division of Biomaterials, Advanced Research Center, School of Life Dentistry at Niigata, The Nippon Dental University.
Dent Mater J. 2011;30(6):894-7. doi: 10.4012/dmj.2011-115. Epub 2011 Nov 25.
Six kinds of experimental magnetic resin composites containing SUS447J1 stainless steel particles as filler were prepared. UDMA/MAA resin with an MAA mole fraction of 0.67 was used as the matrix resin. The effects of six levels of 4-META content (2, 4, 6, 8, 10, and 12 mass%) on the setting and flexural properties were studied. The metal filler content in each paste was 90 mass%. Although working time and setting time significantly diminished with the increase of the BPO and DMPT contents, both working time and setting time satisfied the ISO 4049 requirements for all experimental levels. Flexural strength and elastic modules significantly improved with the increase of 4-META content up to 10%. The optimum 4-META content necessary to develop better composite resins for magnetic attachment has been clarified.
制备了六种以SUS447J1不锈钢颗粒为填料的实验性磁性树脂复合材料。使用甲基丙烯酸甲酯摩尔分数为0.67的UDMA/MAA树脂作为基体树脂。研究了4-META含量的六个水平（2、4、6、8、10和12质量%）对凝固和弯曲性能的影响。每种糊剂中的金属填料含量为90质量%。尽管随着BPO和DMPT含量的增加，工作时间和凝固时间显著缩短，但在所有实验水平下，工作时间和凝固时间均满足ISO 4049的要求。随着4-META含量增加至10%，弯曲强度和弹性模量显著提高。已经明确了开发用于磁性附着的更好复合树脂所需的最佳4-META含量。
