The Effects of Increased Maxillary Canine Bracket Angulation on Tooth Movement and Alignment Efficiency: A Prospective Clinical Study.

IF 0.8 Q4 DENTISTRY, ORAL SURGERY & MEDICINE Turkish Journal of Orthodontics Pub Date : 2022-03-01 DOI:10.5152/TurkJOrthod.2022.20143
Murat Türedi, Sabahat Yazıcıoğlu
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引用次数: 1

Abstract

Objective: This study aimed to evaluate the effects of a 10° angulation of a maxillary canine (Mx3) bracket on Mx3 and maxillary central incisor (Mx1) tooth movements and alignment efficiency in treatments involving maxillary premolar extraction.

Methods: This split-mouth study included 29 individuals in a +10° angulation study group and a 0° angulation control group. The initial (T0) and 12th week (T1) orthodontic models were prepared and digitized with a three-dimensional scanner and superimposed using the OrthoAnalyzer analysis program. The movements of Mx3 and Mx1 were measured, and the alignment efficiency was assessed using Little's Irregularity Index. The Shapiro-Wilk test was used to test the data for a normal distribution. T1 and T0 measurements within the group and T1 and T0 differences between groups were compared using a paired samples t-test. The significance level was set to P < .05.

Results: The linear movements of Mx3 in the distal direction significantly increased, and Little's Irregularity Index values statistically significantly decreased in both groups. Distal movements of Mx3 were significantly higher in the control group than in the study group (P< 0.01 and P< 0.05). The movements of Mx1 and Little's Irregularity Index measurements did not show statistically significant differences between the groups (P > 0.05).

Conclusion: A +10° Mx3 bracket angulation increased the inclination of Mx3 to the mesial, but it decreased the Mx3 distal linear movement and the retraction of Mx1, with no difference in terms of alignment efficiency between the+10° and 0° Mx3 bracket angulations.

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增加上颌牙托角度对牙齿运动和排列效率的影响:一项前瞻性临床研究。
目的:研究上颌前磨牙拔除治疗中,上颌尖牙(Mx3)托槽成10°角度对上颌中切牙(Mx1)和上颌尖牙(Mx3)牙齿移动和对准效率的影响。方法:采用+10°成角研究组和0°成角对照组,共29例。制作初始(T0)和第12周(T1)正畸模型,使用三维扫描仪进行数字化,并使用OrthoAnalyzer分析程序进行叠加。测量了Mx3和Mx1的运动,并用Little不规则指数评价了对准效率。夏皮罗-威尔克检验用于检验数据是否为正态分布。使用配对样本t检验比较组内T1和T0测量值以及组间T1和T0差异。显著性水平设为P < 0.05。结果:两组患者Mx3远端线性运动明显增加,Little’s不规则指数显著降低。对照组Mx3远端运动明显高于研究组(P< 0.01和P< 0.05)。Mx1的运动和Little's不规则指数的测量在两组间差异无统计学意义(P > 0.05)。结论:+10°Mx3支架角度增加了Mx3向近中位的倾斜度,但减少了Mx3远端线性运动和Mx1的内收,+10°和0°Mx3支架角度的对准效率没有差异。
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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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