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Blinding

Blinding

Blinding is a commonly used method of not telling participants which treatment a subject is receiving. Blinding is a critical part of a randomized control trial or RCT. It reduces the bias that affects the results. In an RCT, blinding is used in the form of a placebo. A placebo effect occurs when untreated subjects falsely believe they have received the treatment and report improved symptoms. A placebo or a dummy treatment is administered to subjects to negate the bias caused by such an effect.

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一项随机对照试验,比较在双向倾斜病例中的保留剂.

Nurulhuda Maskim¹, Norhidayah Nor Zahidah Mohd Tahir², Wan Nurazreena Wan Hassan³

¹Orthodontic Unit, Klinik Pergigian Pekan, Hospital Pekan, Ministry of Health Malaysia, Pekan, Pahang, 26600, Malaysia.

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|February 6, 2025

概括

双保留 (DR) 是优越的防止上切肢倾斜在双轴倾斜的病例. 所有的保留方法都在12个月内显示了轻微的,临床上无关紧要的变化.

关键词:

双轴倾斜是指双轴倾斜.双重保留方式双重保留方式固定债券保留费用固定债券保留费用持有者是那些保留者.稳定的稳定性稳定的稳定性在真空中形成的保持器.

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科学领域:

矯正牙科矯正牙科是一種矯正牙科.
牙的稳定性牙的稳定性
保存协议的保留协议.

背景情况:

目前还没有关于保持纠正的双角倾斜的建议.
纠正的双向倾斜病例的稳定性需要进一步调查.
这项研究比较了对双向倾斜病例的保留方案.

研究的目的:

为了比较不同保留协议在纠正双轴倾斜后保持稳定性的有效性.
用不同的保留策略评估软组织和牙参数的变化.
评估内变化和与口腔健康相关的生活质量.

主要方法:

一个单中心,单盲,并行对照试验,共27名参与者.
参与者被随机分为三个组:固定结合保留 (FBR),真空形成保留 (VFR) 和双重保留 (DR).
在12个月的3个月间隔收集的数据,重点是脑力测量变化和OHIP-14 (M) 评分.

主要成果:

观察到上唇,下唇和上切口的前部运动,以及较小的切口倾斜和切口间角的减少.
两组之间在上切肢倾斜度 (UII) 中发现了显著的差异 (p=0.015).
与FBR和VFR相比,双重保留 (DR) 显示了较小的上切肢倾斜.

结论:

所有经过测试的保留方案都导致了统计学上很小的,临床上微不足道的变化.
双保留 (DR) 在双轴倾斜病例中提供了对上切肢倾斜的优越控制.
这些发现表明DR可能是长期稳定的首选方法.