| Magfit磁性附着体铸接式和焊接式衔铁口外磁性固位力的测定 |
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| 引用本文： | 杨凌,杜莉,林映荷,胥春.Magfit磁性附着体铸接式和焊接式衔铁口外磁性固位力的测定[J].华西口腔医学杂志,2003,21(5):386-388. |
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| 作者姓名： | 杨凌 杜莉 林映荷 胥春 |
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| 作者单位： | 610041 四川大学华西口腔医院修复科 |
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| 基金项目： | 四川省应用基础项目资助项目 (编号 0 2sy0 2 9.1 38) |
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| 摘 要： | 目的 比较铸接和焊接对衔铁口外磁性固位力的影响,为临床应用提供实验依据。方法 制作Mag- fitMD800磁性附着体铸接式衔铁试件5个和焊接式衔铁试件6个,对照组为未经处理的成品衔铁,在万能测试机上对3组试件垂直向磁性固位力进行测定。结果 焊接式衔铁组和铸接式衔铁组的口外垂直向磁性固位力分别为 (4·223 3±0·217 0)N、(3·792 9±0·296 4)N。焊接式衔铁组口外垂直向磁性固位力明显大于铸接式衔铁组(P< 0·05)。结论 焊接对磁性附着体磁性固位力的影响较铸接小。
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| 关 键 词： | 焊接式衔铁 铸接式衔铁 磁性固位力 磁性附着体 |
| 收稿时间： | 2003-10-25 |
| 修稿时间： | 2002年12月18 |
The Measurement of Retentive Force of Laser-melted and Cast Post-keepers of Magfit Magnetic Attachments |
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| YANG Ling,DU Li,LIN Yinghe,et al..The Measurement of Retentive Force of Laser-melted and Cast Post-keepers of Magfit Magnetic Attachments[J].West China Journal of Stomatology,2003,21(5):386-388. |
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| Authors: | YANG Ling DU Li LIN Yinghe |
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| Affiliation: | epartment ofProsthodontics,West China College ofStomatology,Sichuan Universi- ty,Chengdu610041,China |
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| Abstract: | OBJECTIVE: In order to compare the influence of casting and laser welding on magnetic retentive force, the magnetic retentive forces of laser-melted and cast post-keepers of the magnetic attachments were measured in vitro. METHODS: 5 cast and 6 laser-melted post-keeper specimens (Magfit MD800) were formed, respectively. Using untreated keeper as control group, the vertical magnetic retentive forces were measured by a universal testing machine. RESULTS: The average vertical magnetic retentive force of the laser-melted post-keeper group and the cast post-keeper group in vitro were (4.223 +/- 0.217,0)N, (3.792,9 +/- 0.296,4)N, respectively. Compared with the cast post-keeper group, the average vertical magnetic retentive force of the laser-melted post-keeper groups was much higher in vitro (P < 0.05). CONCLUSION: Laser welding had less influence on the magnetic retentive force of the magnetic attachments than casting. |
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| Keywords: | laser_melted post_keeper cast post_keeper magnetic retentive force magnetic attachments |
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