不同液体浸泡对硅橡胶软衬拉伸强度的影响  

Effects of different liquid immersion on tensile strength of silicone rubber soft lining

作　　者：郭欣[1] 王柳力[1] 廖国婷 魏天骄[1] 冯剑桥[1] GUO Xin;WANG Liuli;LIAO Guoting;WE;FENG Jianqiao.(The Affiliated Stomatological Hospital of Harbin Medical University, Harbin 150001, China)

机构地区：[1]哈尔滨医科大学附属口腔医院口腔修复科,黑龙江哈尔滨150001

出　　处：《口腔医学》2018年第4期310-313,共4页Stomatology

摘　　要：目的研究不同液体浸泡对硅橡胶类软衬材料拉伸强度的影响。方法采用Vertex热凝树脂基托材料分别与Molloplast B热凝硅橡胶软衬材料(A组)和Up&Up自凝硅橡胶软衬材料(B组)粘接制作实验试件各54个,随机分成9组(编号1~9),每组6个试件,1组作为对照组,不进行任何处理;2~5组在37℃恒温人工唾液中分别浸泡1、7、30、90 d,6~9组常温条件下在义齿清洁剂中分别浸泡1、7、30、90 d。所有试件进行拉伸强度测定并观察断裂面。结果浸泡在人工唾液中的Molloplst B热凝试件和Up&Up自凝试件的拉伸强度均无显著差异(P>0.05);浸泡在义齿清洁剂中90 d的Up&Up自凝试件的拉伸强度降低,相比对照组、1 d、7 d和30 d,差异有统计学意义(P<0.05);热凝硅橡胶软衬材料的强度高于自凝硅橡胶软衬材料(P<0.01)。结论人工唾液浸泡对硅橡胶软衬材料的强度无明显影响;义齿清洁剂浸泡90 d使Up&Up自凝硅橡胶软衬的拉伸强度有所降低;热凝硅橡胶软衬材料的拉伸强度高于自凝硅橡胶软衬材料。Objective To study the effects of different liquid immersion on the tensile strength of silicone rubber soft lining materials.Methods A total of 54 experimental specimens were prepared by bonding Vertex thermosetting resin base material with Molloplst B thermal silicone rubber soft lining material（ group A） and Up Up self-setting silicone rubber soft lining material（ group B） respectively. A1-9,B1-9 were used in each group with 6 specimens,A1 B1 group as experimental control group,no treatment; A2-5 and B2-5 were soaked in 37 ℃ constant temperature artificial saliva for 1 day,7 days,30 days and 90 days,A6-9 and B6-9 were immersed in denture cleaner at room temperature for 1 day,7 days,30 days and 90 days,respectively. The tensile strength of all specimens was tested and the fracture surface was observed. Results There was no significant change in the tensile strength of the tested samples in artificial saliva soaking group（ P〉0.05）. The tensile strength of Up Up self-setting specimen immersed in denture cleaner decreased at 90 days,and compared with the experimental group,the difference was statistically significant（ P〈0.05）. The strength of the thermosetting silicone rubber soft lining material was higher than that of the self-coagulated silicone rubber soft lining material（ P〈0.01）.Conclusions Artificial tacil soaking has no significant effect on the strength of silicone rubber soft lining material. Denture cleaner soaking 90 d makes Up Up self-shearing silicone rubber soft lining tensile strength reduced. The tensile strength of thermosetting silicone rubber soft lining material is higher than silicone rubber soft lining material.

关 键 词：硅橡胶 软衬材料 拉伸强度 

分 类 号：R783.1[医药卫生—口腔医学]