中国组织工程研究 ›› 2014, Vol. 18 ›› Issue (47): 7597-7602.doi: 10.3969/j.issn.2095-4344.2014.47.010

• 组织工程口腔材料 tissue-engineered oral materials • 上一篇    下一篇

颊侧多曲簧弯制前后加热处理对疲劳断裂周期的影响

白雪霏1,王培军1,徐实谦2,侯  录1,刘  玉1   

  1. 1哈尔滨医科大学附属第二医院口腔正畸科,黑龙江省哈尔滨市  150086
    2哈尔滨工业大学材料科学与工程学院,黑龙江省哈尔滨市  150001
  • 修回日期:2014-10-31 出版日期:2014-11-19 发布日期:2014-11-19
  • 通讯作者: 王培军,教授,哈尔滨医科大学附属第二医院口腔正畸科,黑龙江省哈尔滨市 150086
  • 作者简介:白雪霏,女,1979年生,黑龙江省哈尔滨市人,汉族,哈尔滨医科大学附属第二医院口腔正畸科在读硕士,主要从事口腔正畸方面的研究。

Heat treatment effect on the fatigue fracture cycle of buccal multiloop

Bai Xue-fei1, Wang Pei-jun1, Xu Shi-qian2, Hou Lu1, Liu Yu1   

  1. 1Department of Orthodontics, the Second Affiliated Hospital of Harbin Medical University, Harbin 150086, Heilongjiang Province, China
    2School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, Heilongjiang Province, China
  • Revised:2014-10-31 Online:2014-11-19 Published:2014-11-19
  • Contact: Wang Pei-jun, Professor, Department of Orthodontics, the Second Affiliated Hospital of Harbin Medical University, Harbin 150086, Heilongjiang Province, China
  • About author:Bai Xue-fei, Studying for master’s degree, Department of Orthodontics, the Second Affiliated Hospital of Harbin Medical University, Harbin 150086, Heilongjiang Province, China

摘要:

背景:颊侧多曲簧活动矫治器可以阻断性矫治多种青少年错牙合畸形,但在临床中颊侧多曲簧疲劳断裂的问题是不可避免的,如何延长其疲劳断裂周期以确保矫治顺利进行仍然处于研究阶段。
目的:研究颊侧多曲簧弯制前、后进行不同温度加热处理,对其疲劳断裂周期(时间)的影响,从而选出一种能够增强颊侧多曲簧抗疲劳性能的最佳方法。
方法:弯制左侧HL-2型颊侧多曲簧35个,根据曲簧弯制前、后热处理分为7组,5个试样为一组,分别为:原丝组、弯制前对牙用不锈钢丝进行加热处理组(320,420,520 ℃)3组、弯制成曲簧后行加热处理组(320,420,520 ℃)3组,低温热处理后,再用三维开闭口运动模拟测试仪测试其疲劳断裂周期(时间),通过扫描电镜观察断裂曲簧的断口形貌特征。
结果与结论:曲簧疲劳断裂周期均值从大到小排列顺序为:弯制前520 ℃组>弯制前420 ℃组>弯制前320 ℃组>原丝组>弯制后520 ℃组>弯制后320 ℃组>弯制前420 ℃组,说明在曲簧弯制前对牙用不锈钢丝进行加热处理可延长曲簧的疲劳断裂周期,其中520 ℃低温退火工艺可有效提高曲簧抗疲劳断裂的机械性能;在曲簧弯制完成后进行加热处理不能延长曲簧的疲劳断裂周期。扫描电镜下观察弯制前520 ℃组断口裂纹伸展区域有扩大趋势,延缓瞬断过程的形成,组织结构更加均匀。


中国组织工程研究杂志出版内容重点:生物材料;骨生物材料; 口腔生物材料; 纳米材料; 缓释材料; 材料相容性;组织工程


全文链接:

关键词: 生物材料, 口腔生物材料, 颊侧多曲簧, 不锈钢丝, 热处理, 疲劳断裂周期, 断口形貌

Abstract:

BACKGROUND: Buccal Multiloop Removable Appliance can interceptively correct mutiple adolescent malocclusions. But the clinical problem of Buccal Multiloop fatigue fracture is not solved yet. How to prolong the fatigue fracture cycle is still in the research stage.
OBJECTIVE: To study the effect of different temperature of heat treatment on the Buccal Multiloop fatigue fracture cycle, thereby to select a relatively optimal method to enhance the fatigue fracture cycle.
METHODS: Thirty-five left HL-2 Buccal Mltiloops were divided into seven groups according to different ways of heat treatment. Each group consisted of five samples. They were an untreated group, three pre-bending groups (320, 420, 520 ℃ heat treatment before bending) and three post-bending groups (320, 420, 520 ℃ heat treatment after bending). The dental stainless steel wires and Buccal Multiloop were respectively treated by low-temperature annealing. The data were recorded and evaluated after the samples tested by the 3D Simulating Movement of TMJ Testing Machine. The features of fatigue fracture were observed by scanning electron microscope.
RESULTS AND CONCLUSION: The mean values of the Buccal Multiloop fatigue fracture cycle from largest to smallest  were as follows: 520 ℃ pre-bending group > 420 ℃ pre-bending group > 320 ℃ pre-bending group > untreated group > 520 ℃ post-bending group > 320 ℃ post-bending  group > 420 ℃ post-bending group. The fatigue fracture cycle of Buccal Multiloop made of the dental stainless steel wires after 520 ℃ annealing treatment was longer than others. By the observation of scanning electron microscope, the fracture crack extension area had the tendency to expand, transient interruption was delayed and the tissue structure became more uniform.


中国组织工程研究杂志出版内容重点:生物材料;骨生物材料; 口腔生物材料; 纳米材料; 缓释材料; 材料相容性;组织工程


全文链接:

Key words: orthodontic appliances, activator appliances

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