矫正器矫正牙齿移动的可预测性:治疗设计的影响。

IF 4.8 2区 医学 Q1 Dentistry Progress in Orthodontics Pub Date : 2023-01-16 DOI:10.1186/s40510-022-00453-0
Tommaso Castroflorio, Ambra Sedran, Simone Parrini, Francesco Garino, Matteo Reverdito, Riccardo Capuozzo, Sabrina Mutinelli, Simonas Grybauskas, Mantas Vaitiekūnas, Andrea Deregibus
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引用次数: 14

摘要

背景:本研究旨在定义:(1)当由专业操作员设计治疗计划时,Invisalign矫正器的哪些OTM是不太可预测的,(2)附件的存在和形状是否影响OTM的可预测性,以及(3)患者的人口统计学是否影响OTM的预测性。该样本包括79名前瞻性招募的患者(平均年龄30.8岁;标准差12.0;23 M,56 F),由专家操作员进行治疗,上颌弓平均使用27个矫正器(标准差15),下颌弓平均使用25个矫正器。从ClinCheck®软件导出治疗后数字模型和最终虚拟治疗计划模型作为STL文件,随后导入Geomagic Qualify®软件,以比较最终牙齿位置。计算并测试每颗牙齿在近中-远中、前庭-舌和咬合-牙龈方向上的差异,以及角度、倾斜和旋转的统计学意义。此外,还检验了分类变量的统计学显著性。结果:矫正缺失在所有运动和所有组牙中均有显著性差异(P 结论:使用矫正器进行正畸运动的可预测性仍然存在与系统生物力学相关的局限性:一些附件的形状和矫正器材料的特性需要重新定义。然而,这项研究的结果允许正确设计虚拟治疗计划,揭示需要多少过度矫正以及哪些附件最有效。
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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Predictability of orthodontic tooth movement with aligners: effect of treatment design.

Backgrounds: The present study was designed to define: (1) which are the less predictable OTM with Invisalign aligners when the treatment plan is designed by expert operators, (2) if the presence and shape of attachments influence the predictability of OTM and (3) if patients' demographics influence OTM predictability. The sample comprises 79 prospectively recruited patients (mean age 30.8 years; SD 12.0; 23 M, 56 F), treated by expert operators with an average of 27 aligners (SD 15) in the maxillary arch and 25 aligners (SD 11) in the mandibular arch. Post-treatment digital models and final virtual treatment plan models were exported from ClinCheck® software as STL files and subsequently imported into Geomagic Qualify ®software, to compare final teeth positions. The differences were calculated and tested for statistical significance for each tooth in the mesial-distal, vestibular-lingual and occlusal-gingival directions, as well as for angulation, inclination and rotation. In addition, the statistical significance of categorical variables was tested.

Results: The lack of correction was significant for all movements and in all group of teeth (P < 0.01) except for the rotation of maxillary first molar. The prescribed OTM, the group of teeth and movement, the frequency of aligner change and the use of attachment influence the outcome. The greatest discrepancies in predicted and achieved tooth position were found for angular movements and rotation of teeth characterized by round-shaped crowns, for a ratio of approximately 0.4° per 1° prescribed. Optimized attachments for upper canines and lower premolar rotation seem not working properly. Second molar movements are mostly unexpressed. Furthermore, changing the aligner every 14 days will reduce the lack of correction of the 12% with respect to 7 days aligner change.

Conclusions: Predictability of orthodontic movement with aligners still has limitations related to the biomechanics of the system: the shape of some attachments and the characteristics of aligner material need to be redefined. However, the results of this study allow to properly design the virtual treatment plan, revealing how much overcorrection is needed and which attachments are most effective.

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来源期刊
Progress in Orthodontics
Progress in Orthodontics Dentistry-Orthodontics
CiteScore
7.30
自引率
4.20%
发文量
45
审稿时长
13 weeks
期刊介绍: Progress in Orthodontics is a fully open access, international journal owned by the Italian Society of Orthodontics and published under the brand SpringerOpen. The Society is currently covering all publication costs so there are no article processing charges for authors. It is a premier journal of international scope that fosters orthodontic research, including both basic research and development of innovative clinical techniques, with an emphasis on the following areas: • Mechanisms to improve orthodontics • Clinical studies and control animal studies • Orthodontics and genetics, genomics • Temporomandibular joint (TMJ) control clinical trials • Efficacy of orthodontic appliances and animal models • Systematic reviews and meta analyses • Mechanisms to speed orthodontic treatment Progress in Orthodontics will consider for publication only meritorious and original contributions. These may be: • Original articles reporting the findings of clinical trials, clinically relevant basic scientific investigations, or novel therapeutic or diagnostic systems • Review articles on current topics • Articles on novel techniques and clinical tools • Articles of contemporary interest
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