摘要
目的探讨人工唾液和乳酸对Vitallium 2000钴铬钼合金卡环疲劳强度的影响。方法用成品卡环蜡型制作Vitallium 2000钴铬钼合金卡环15个,分为3组,分别在空气、人工唾液和乳酸溶液中进行测试。自动记录初始载荷强度和疲劳失效前的载荷循环次数,扫描电镜分析疲劳裂纹。结果 Vitallium 2000钴铬钼合金卡环在不同测试条件下的初始载荷强度无差异(P>0.05)。在空气中的循环次数最高,在乳酸溶液中的循环次数最低。SPSS软件分析表明3组之间的疲劳强度有显著性差异(P<0.01)。结论人工唾液和乳酸溶液均使Vitallium 2000钴铬钼合金卡环的疲劳强度下降。
Objective To study the effect of artificial saliva and lactic acid solution on the fatigue strength of Vitallium 2000 Co-CrMo alloy clasps. Methods 15 clasp specimens of Vitallium 2000 Co-Cr-Mo alloy clasps were made from prefabricated clasp wax,and were divided into 3 groups. Specimens were tested in air,artificial saliva and lactic acid solution. Initial loading force and loading cycle numbers before fracture were registered automatically,and fracture flaws were examined with a scanning electron microscope（ SEM）. Results Initial loading force of Vitallium 2000 Co-Cr-Mo alloy clasps didn＇t differ significantly in three test conditions（ P〈0. 05）. The tested clasps had the highest loading number cycles in air and the lowest ones in lactic acid solution. Fatigue strength analysis of SPSS software showed a significant difference among three groups（ P〈0. 01）. Conclusion Both artificial saliva and lactic acid solution reduce the fatigue strength of Vitallium 2000 Co-Cr-Mo alloy clasps.
出处
《口腔医学》
CAS
2016年第1期34-36,43,共4页
Stomatology
