衔铁铸造桩在磁性固位体覆盖义齿中的机械固位力研究  

The mechanic retention of the casting post with keeper in magnetic retentor overdenture

作　　者：徐侃[1] 孙健[1] 黄庆丰[1] 陈蓉[1] 顾军连[1] 章晓音[1] 

机构地区：[1]上海交通大学医学院附属第九人民医院.口腔医学院口腔修复科

出　　处：《上海口腔医学》2005年第5期525-527,共3页Shanghai Journal of Stomatology

基　　金：上海市重点学科(特色学科)建设项目(T0203)~~

摘　　要：目的:探讨用非贵金属(Co-Cr合金)替代贵金属制作衔铁铸造桩核,提高衔铁铸造桩机械固位力的可行性。方法:选择离体牙下颌尖牙1颗,进行牙体制备。然后,在同一牙根管内,用自凝树脂制作32个树脂桩,随机分为4组,每组8个桩,其中2组分别用Co-Cr合金及金合金(55.6%Au)铸造,另2组用Co-Cr合金制作的衔铁桩核表面分别用金沉积和金粉涂布技术进行表面处理;最后通过离体牙拉伸试验测试,以得到相关数据,用SAS6.2进行单因素方差分析。结果:Co-Cr合金衔铁桩与金合金衔铁桩在牙体的脱位力有显著差异,而Co-Cr合金衔铁桩在分别经过表面金沉积和金粉涂布处理后,与金合金衔铁桩组的脱位力比较,无显著差异。结论:用Co-Cr合金制作的衔铁铸造桩表面通过金沉积和金粉涂布技术处理后,同样能够达到或接近用金合金制作的衔铁铸造桩的临床固位效果,使其机械固位力明显提高。PURPOSE： To reduce the cost of the fabrication of the magnetic retentor, and meet the clinical requirements, nonprecious alloy such as Co-Cr alloy was used to fabricate the magnetic retentor in overdenture, instead of the precious alloy. METHODS： A mandibular canine was chosen for root canal preparation in vitro. Thirty two resin posts were made in the same root canal with self-curing resin. The 32 resin posts were randomly divided into 4 groups. Among them, 2 groups were fabricated with soft Co-Cr alloy, gold alloy（55.6%Au） respectively in vitro. Another 2 groups were fabricated with Co-Cr alloy, and the surface of the root casting post with keeper were treated with gold deposit and gold coating technique. After that, test of dislodgment force was done and one-way ANOVA was performed with SAS 6.2 software package. RESULTS： The dislodgment force of the root casting posts with keeper which were fabricated with the Co-Cr, Ni-Cr, and gold alloy had significant difference（P〈0.01）, While after surface treatment by gold deposit and gold coating technique on root casting posts with keeper that were fabricated with Co-Cr and Ni-Cr alloy ,there was no significant difference in dislodgment force, compared with that of gold alloy. CONCLUSIONS： After surface treatment of the root casting posts with keeper which were fabricated with the Co-Cr and Ni-Cr alloy, the same clinical retentive effect can be obtained as the one that was fabricated with gold alloy.Supported by Shanghai Leading Academic Discipline Project （T0203）.

关 键 词：衔铁铸造桩 金沉积技术 涂金粉技术 固位力 

分 类 号：R783[医药卫生—口腔医学]