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使用清晰对齐器在不同步幅和扭矩上的上扩张的影响:一个三维有限元素分析

Yanqi Zhang¹, Shuoyi Hui¹, Linyuan Gui¹

¹State Key Laboratory of Oral & Maxillofacial Reconstruction and Regeneration & National Clinical Research Center for Oral Diseases & Shaanxi Clinical Research Center for Oral Diseases & Department of Orthodontics, School of Stomatology, Air Force Medical University, Xi'an, Shaanxi, 710032, China.

BMC oral health

|November 21, 2023

概括

清晰对齐器 (CA) 大门扩张可以导致口腔倾斜. 最佳的步伐长度和扭矩补偿对于有效扩张至关重要,具体的角度取决于患者的需要.

科学领域:

矯正牙科矯正牙科是一種矯正牙科.
生物材料科学生物材料科学
牙科机械牙科机械

背景情况:

清晰对齐器 (CA) 越来越多地用于大弓扩张.
后牙的口腔倾斜是一种常见的并发症,降低了治疗的有效性.
基于CA的上扩张的最佳参数需要进一步调查.

研究的目的:

为了确定适当的顶门扩张步伐长度和扭矩补偿角度,清晰的对齐器.
在清晰对齐器治疗中实现理想的牙运动,以扩展上门.

主要方法:

开发了一个3D有限元模型,包括清晰对齐器,大,牙周带 (PDL) 和牙.
模拟分析了应力分布,膨胀效率和运动趋势在不同的步长 (0.10.3毫米) 和扭矩补偿角度 (0°1.5°) 下.

主要成果:

大门扩张导致后牙的口腔倾斜和前牙的舌头倾斜.
增加的扭矩补偿减少了后面的口腔倾斜,但也降低了膨胀效率.
对后牙的身体运动观察到特定的步伐和扭矩组合 (例如,0.1毫米的步伐与1.2度的扭矩,0.2毫米的步伐与~2度的扭矩).
较高的步伐长度 (0.3毫米) 显示,随着扭矩补偿的增加,改善程度有限.

结论:

用清晰的对齐器扩展大门可以导致后牙的口腔倾斜.
最佳扭矩补偿角度是患者特异的,取决于所需的治疗结果.
仔细选择步伐长度和扭矩补偿对于有效的清晰对齐器治疗至关重要.

关键词:

门扩张门扩张清晰的对齐器对齐器可以清晰地对齐.一个有限的元素.步履长度步履长度步履长度扭矩扭矩是指扭矩.

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