The predictability of maxillary curve of Spee leveling with the Invisalign appliance.

IF 3 2区医学 Q1 DENTISTRY, ORAL SURGERY & MEDICINE

Angle Orthodontist Pub Date : 2023-11-01 DOI:10.2319/022423-128.1

Zi Wei Lim, Maurice J Meade, Tony Weir

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引用次数: 1

Abstract

Objectives: To evaluate the predictability of the Invisalign appliance (Align Technology, Santa Clara, Calif) in leveling the maxillary curve of Spee (COS).

Materials and methods: A retrospective sample of adult subjects treated with the Invisalign appliance between 2013 and 2019 were selected. Patients were treated nonextraction in the maxillary arch and had either Angle Class I or II malocclusions with a minimum of 14 aligners with no bite ramps. Initial, predicted, and actual outcomes were analyzed with Geomagic Control X software (version 2017.0.3; 3D Systems, Cary, NC).

Results: A sample of 53 cases satisfied inclusion/exclusion criteria. Paired t-tests demonstrated a significant difference between mean predicted and actual maxillary COS leveling with a shortfall of 0.11 mm (SD = 0.37; P = .033). Planned intrusion tended to be more accurate posteriorly with an overexpression of 117% for the first molars. Planned extrusion was the least accurate, with the mid-arch demonstrating expressions of -14% to -48%. These teeth intruded despite a prescribed extrusive movement.

Conclusions: The Invisalign appliance did not accurately predict maxillary COS leveling. Planned intrusive movements were overcorrected, and planned extrusive movements were either undercorrected or resulted in intrusion. This effect was most apparent for the upper first molar, which expressed 117% and -48% of planned intrusion and extrusion, respectively.

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Invisalign矫治器矫正Spee上颌曲线的可预测性。

目的：评估Invisalign矫治器（Align Technology，Santa Clara，Calif）在矫正Spee上颌曲线（COS）方面的可预测性。材料和方法：选择2013年至2019年间使用Invisaligan矫治器治疗的成年受试者的回顾性样本。患者接受了上颌弓非牵引治疗，患有Angle I或II类错牙合，至少有14个矫正器没有咬合斜面。使用Geomagic Control X软件（版本2017.0.3；3D Systems，Cary，NC）分析初始、预测和实际结果。结果：53例病例样本符合纳入/排除标准。配对t检验表明，预测的平均上颌COS水平和实际上颌COS平差之间存在显著差异，缺口为0.11 mm（SD=0.37；P=.033）。计划侵入往往更准确，第一磨牙的过度表达率为117%。计划挤压最不准确，中拱的表达率为-14%-48%。尽管有规定的挤出运动，这些牙齿还是会侵入。结论：Invisalign矫治器不能准确预测上颌COS水平。计划中的侵入运动被过度纠正，而计划中的挤出运动要么被纠正不足，要么导致了入侵。这种影响在上第一磨牙中最为明显，分别占计划侵入和挤出的117%和-48%。

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

Angle Orthodontist 医学-牙科与口腔外科

CiteScore

6.40

自引率

5.90%

发文量

审稿时长

3 months

期刊介绍： The Angle Orthodontist is the official publication of the Edward H. Angle Society of Orthodontists and is published bimonthly in January, March, May, July, September and November by The EH Angle Education and Research Foundation Inc. The Angle Orthodontist is the only major journal in orthodontics with a non-commercial, non-profit publisher -- The E. H. Angle Education and Research Foundation. We value our freedom to operate exclusively in the best interests of our readers and authors. Our website www.angle.org is completely free and open to all visitors.