树脂基托浸出物及降低其浸出量的方法  

Leaching ingredients of denture base resins and methods to reduce their amount

作　　者：左伟文[1] 黄华莉[1] 武燃[2] 杨杨[1] 石磊[1] 朱松[1] 

机构地区：[1]吉林大学口腔医院修复科,长春130021 [2]吉林大学口腔医院口腔颌面外科,长春130021

出　　处：《国际口腔医学杂志》2014年第3期333-336,共4页International Journal of Stomatology

基　　金：吉林省发展和改革委员会资助项目(2011007-5)

摘　　要：在树脂聚合反应中,单体甲基丙烯酸甲酯转换并不完全,基托内仍有残余甲基丙烯酸甲酯存在。在浸泡基托的液体中,可检测到甲基丙烯酸、甲醛、苯甲酸、邻苯二甲酸、苯甲酸苯酯、双环己基邻苯二甲酸酯、酜酸丁二酯、水杨酸苯酯和过氧化苯甲酰等成分。甲基丙烯酸甲酯及其派生物不但对牙龈成纤维细胞、牙髓细胞和牙周膜细胞等原代细胞的细胞膜完整性和细胞功能有一定影响,还影响谷胱甘肽、细胞因子和生长因子的表达。甲基丙烯酸甲酯单体的聚合程度直接影响材料的表面硬度、光洁度、拉伸强度、挠曲强度、抗疲劳度以及耐磨性、尺寸和颜色稳定性,加速唾液中某些酶对聚合物的降解和细菌在基托表面的滋生。提高聚合物粉液比,水浸泡,适当延长聚合周期或升高加热温度,聚合树脂热处理,添加聚乙烯纤维,添加交联剂,表面抛光,紫外线活化的涂层材料,适宜的活化剂质量浓度,可降低残余甲基丙烯酸甲酯水平。The conversion of monomers to polymers is incomplete in the polymerization of denture base resins. Some unreacted methyl methacrylate monomers remain in the denture base. Methacrylic acid, formaldehyde, benzoic acid, phthalic acid, benzoic acid phenyl ester, dicyclohexyl phthalate, polybutylene succinate, phenyl salicylate, and benzoyl peroxide can be detected in the soaking liquid of denture base resins. Methyl methacrylate and its derivatives affect the membrane integrity and cellular function of primary cells, such as gingival fibroblasts, pulp cells, and periodontal ligament cells. They likewise affect the expression of glutathione, cytokines, and growth factors. The degree of methyl methacrylate polymerization directly affects the surface hardness, finish, flexure strength, deflection, fatigue resistance, wear resistance, and dimensional and color stability of the material and further accelerates the degradation effect of certain enzymes in saliva to the polymer and microbes breeding on the surface of the denture base. Different methods, such as increasing the polymer powder-liquid ratio, soaking the denture base in water, extending the polymerization period, increasing the temperature of the polymerization cycle, subjecting the resins to heating treatment after polymerization, adding polyethylene fibers or crosslinking agents, polishing the surface, utilizing a ultraviolet-activated coating material, and appropriately adjusting the activator quality concentrations, can be implemented to reduce the level of residual methyl methacrylate.

关 键 词：甲基丙烯酸甲酯 基托树脂 浸出物 浸出量 

分 类 号：R783.1[医药卫生—口腔医学]