| 黄浩,丘雨蓓,林珊.两种处理脱落金属托槽方法对镍离子析出量影响的体外研究[J].口腔材料器械杂志,2012,21(3):127-129. |
| 两种处理脱落金属托槽方法对镍离子析出量影响的体外研究 |
| Investigation on the amount of nickel ions released from recused oethodontic brackests with two treatment methods in vitro |
| 投稿时间：2011-11-25 修订日期：2012-04-25 |
| DOI：10.11752/j.kqcl.2012.03.04 |
| 中文关键词: 磨除 喷砂 托槽 金属腐蚀 |
| 英文关键词:Grinding Sandbblasting Bracket Metal corrosion |
| 基金项目: |
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| 中文摘要: |
| 目的：通过检测两种方法去除底板残余粘接剂后的金属托槽在人工唾液中析出的镍离子含量,探讨其处理方法对托槽耐腐蚀性能的影响。方法： 采用全新标准方丝弓金属托槽,共30个样本,随机分为3组:对照组、磨除组和喷砂组,后2组分别采取磨除法和喷砂法去除托槽底板上的粘接剂。将30个样本分别浸泡在人工唾液中,28d后采用电感耦合等离子发射光谱分析法(ICP-MS)测定浸泡液中镍离子析出量。结果： 磨除组和喷砂组的镍离子析出量均高出对照组,差异均有统计学意义(P<0.05)。磨除组和喷砂组之间的镍离子析出量却没有显著性差异(P>0.05)。结论： 两种去除托槽底板粘接剂的方法均会降低金属托槽的耐腐蚀性能,但两种方法的影响程度无明显差异。 |
| 英文摘要: |
| Objective: To assess the resistance to sliding in twin-slot bracket during simulated canine retraction. Methods: A silicone based simulation system of canine sliding was used. Thecanine bonded with twin-slot bracket was drawn along 0.016 inch and 0.018 inch round wires with the traction of 10cN,15cN and 20cN respectively. The canine bonded with conventional edgewise bracket sliding along a single 0.016 inch×0.022 inch rectangular wire served as control. The rate of the canine movement was tested by a laser displacement sensor to indicate the resistance between the bracket and the wire(s). Results: The rate of the canine movement in twin-slot bracket group was lower than the single-slot bracket with the traction of 10cN and 15cN. But when the force increased to 20cN,twin-slot bracket group confronted highed rate compared with single-slot bracket group. Conclusions: With sufficient force,the twin-slot bracket engaged with 0.016 inch and 0.018 inch round wires encounted a decreasing resistance to sliding compared with the edgewise bracket engaged with 0.016 inch×0.022 inch as wire. |
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