氩弧焊接方法在口腔修复工艺技术中的应用

目的：探讨应用氩弧焊接高熔合金铸造支架，修补铸件缺陷，焊接双套冠义齿以及铸造冠桥邻接点关系不良的焊接修补等临床效果。方法：将断裂支架或附着体与支架准确对位，用磷酸盐高温包埋材料进行包埋，尽量暴露焊接区，采用氩弧焊接。如果冠桥邻接点接触不良或在铸造支架上增加固位装置，可直接在铸件上焊接，无须包埋，只要焊接材料相同即可。结果：焊接断裂支架30件，修补铸件缺损10件，焊补铸造冠桥邻接点不良及咬合面过低8件，在旧铸造支架上焊接固位装置6件，焊接套筒冠义齿2件。经3—5年临床随访及复诊观察，总成功率89．29％，失败6例。结论：氩弧焊接方法在口腔修复工艺技术中有广泛的用途，只要焊材和母材相同，焊接同种合金效果良好。

Clinical application of argon-arc welding in prosthodontics

Objective： To evaluate the feasibility of using argon-arc welding in casting metal framework, repairing casting defect, welding telescope crown and reparing crown and bridge inadequate proximal contact. Methods： Making fractured framework or attachment diaplasis and invested in phosphate-bonded inventment material, welding area is exposed, ar- gon-arc welding is used. If reparing inadequate proximal contact of crown and bridge or adding retention finger in casting framework, we can weld directly without investing. Results： We have welded fractured framework 30 cases, repaired casting defect 10 cases, welded inadequate proximal contact and lower occlusion of casting crown and bridge 8 cases, welded retention finger in old framework 6 cases, welded telescope crown 2 cases, through surveying and following up by 3-5years, the success ratio takes 89.29%, 6 cases failed. Conclusions： Argon-arc welding have widely used in prosthodontics, it has a excellent effct when we weld the same kinds of alloy.