Assessment of Maxillary Molar Tooth Changes Caused by Class III Elastics in Hybrid Hyrax-Mentoplate Treatments: A Pilot Study.

IF 0.8 Q4 DENTISTRY, ORAL SURGERY & MEDICINE
Gamze Yıldırım, Elvan Önem Özbilen
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引用次数: 0

Abstract

Objective: This study aimed to investigate the positional changes of maxillary first molars in patients treated with the hybrid hyrax-mentoplate and Cl III elastics combination using cone-beam computed tomography (CBCT).

Methods: Ten patients (7 females-3 males, mean age: 11.66±0.83 years) treated with hybrid hyrax-mentoplate at Marmara University Department of Orthodontics were included. Angular and linear measurements were taken from pre-treatment and post-treatment CBCT images, and changes in maxillary first molar teeth were examined using 3D SLICER version 5.0.2 (www.slicer.org). Statistical significance was set at p≤0.05.

Results: Significant increases were observed in all distance measurements except C16p-C26p in the coronal plane, and significant decreases were observed in angular measurements only at 16mb and 26mb (p≤0.05). All measurements in the sagittal plane significantly increased compared to the vertical and horizontal reference lines (p≤0.001). Angular measurements relative to the palatal reference line significantly increased only in P-16p, P-26mb, and P-26p (p≤0.05). In skeletal measurements, significant changes were observed only in V-A, V-ANS, H-PNS, and V-PNS measurements (p≤0.05). The expansion at the apical level was significantly higher than that at the coronal level (p≤0.05). Compared to the V line, more mesial movement was observed at the coronal level than at the apical level (p≤0.001).

Conclusion: The use of Class III elastics causes greater expansion at the apical level than the coronal. Molar teeth exhibit a mesial movement, but there could be multiple contributing factors. In molars connected to Class III elastics, extrusion occurs. When vertical control is important, appropriate safety measures are advised.

Hyrax-Mentoplate混合治疗中III类弹性材料对上颌磨牙变化的评估:一项初步研究。
目的:利用锥束ct (cone-beam computed tomography, CBCT)观察采用hyrax-mentoplate + Cl - III弹性组合治疗患者上颌第一磨牙的位置变化。方法:选取马尔马拉大学口腔正畸科采用混合hyrax-mentoplate治疗的患者10例(女7例,男3例,平均年龄11.66±0.83岁)。对治疗前和治疗后的CBCT图像进行角度和线性测量,并使用3D SLICER 5.0.2版本(www.slicer.org)检查上颌第一磨牙的变化。p≤0.05为差异有统计学意义。结果:除冠状面C16p-C26p外,其他距离测量值均显著升高,仅16mb和26mb角度测量值显著降低(p≤0.05)。与垂直和水平参考线相比,矢状面所有测量值均显著增加(p≤0.001)。仅p -16p、p -26mb和p -26p组相对于腭参考线的角度测量值显著增加(p≤0.05)。在骨骼测量中,只有V-A、V-ANS、H-PNS和V-PNS测量值有显著变化(p≤0.05)。根尖水平的扩张显著高于冠状水平(p≤0.05)。与V线相比,冠状水平比根尖水平观察到更多的中位运动(p≤0.001)。结论:III类弹性材料的使用在根尖水平比冠状水平引起更大的膨胀。臼齿向内侧移动,但可能有多种因素。在连接到III类弹性材料的磨牙中,会发生挤压。当垂直控制很重要时,建议采取适当的安全措施。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Turkish Journal of Orthodontics
Turkish Journal of Orthodontics Dentistry-Orthodontics
CiteScore
2.10
自引率
9.10%
发文量
34
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