Accuracy of Preliminary Maxillary Canine and Anchorage Tooth Movement in Premolar Extraction Cases Using 12 In-House Clear Aligners: A Randomised Control Trial Comparing Power Arm and Control

IF 2.4 3区医学 Q2 DENTISTRY, ORAL SURGERY & MEDICINE

Orthodontics & Craniofacial Research Pub Date : 2024-12-28 DOI:10.1111/ocr.12889

Natnicha Vongtiang, Nathaset Tongkitcharoen, Sawitt Eurutairat, Somchai Manopatanakul, Peerapong Santiwong, Nita Viwattanatipa

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引用次数: 0

Abstract

Objectives

To investigate maxillary canine movement accuracy and anchorage during space closure in first premolar extraction cases (maximum anchorage) using In-House Clear Aligners (IHCAs).

Materials and Methods

A randomised controlled trial with a split-mouth design recruited 16 adults in university setting. Each patient was randomly assigned by side for canine retraction using 12 IHCAs to both the experimental palatal power arm (Pa) and non-Pa control (C). Accuracy was assessed using GOM Inspect by superimposing the virtual and actual digital models between pretreatment and 12th IHCA. Paired t-test or Wilcoxon signed-rank test was used to compare virtual-power arm (VPa) versus actual-power arm (APa) and virtual-control (VC) versus actual-control (AC). Root mean square error (RMSE) was calculated.

Results

Pa displayed a significant difference in preliminary canine distalisation (VPa 2.0 mm vs. APa 2.4 mm), while the control did not differ. Both Pa and control exhibited significantly greater actual distal crown tipping than virtual movement (VPa 4.4° vs. APa −6.3°/VC 4.4° vs. AC −4.3°). AC achieved more canine rotation than VC. RMSE was slightly greater in Pa than control for canine distalisation (Pa 0.6 vs. C 0.55 mm) and distal crown tipping (Pa 10.9° vs. C 8.99°). Conversely, Pa displayed better accuracy in canine rotation. For anchorage, Pa and control exhibited significantly greater actual mesialisation and mesial tipping than virtual. RMSE for anchorage mesialisation and mesial tipping were comparable between Pa and control.

Conclusions

Preliminary canine retraction using Pa may result in greater error in distal crown tipping but less rotation than control.

Trial Registration

ISRCTN 14020146 by the International Standard Randomised Controlled Trial Registry

Abstract Image

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在前磨牙拔牙中使用12个内部清晰对准器的上颌尖牙和支抗牙移动的准确性：一项比较动力臂和对照组的随机对照试验。

目的：研究在第一前磨牙拔牙过程中，使用内置式牙齿矫正器（IHCAs）对上颌犬齿的运动精度和固支度的影响。材料与方法：随机对照试验，采用开口设计，在大学环境中招募16名成年人。每个患者被随机分配使用12个IHCA进行犬类牵开，包括实验腭动力臂（Pa）和非腭动力臂(C)。使用GOM Inspect通过叠加预处理和12个IHCA之间的虚拟和实际数字模型来评估准确性。采用配对t检验或Wilcoxon符号秩检验比较虚拟动力臂（VPa）与实际动力臂（APa）、虚拟对照（VC）与实际对照（AC）。计算均方根误差（RMSE）。结果：Pa组初步犬齿离体有显著差异（VPa 2.0 mm vs. APa 2.4 mm），而对照组无差异。Pa和对照组均表现出明显大于虚拟移动的远端冠倾（VPa 4.4°vs. APa -6.3°/VC 4.4°vs. AC -4.3°）。AC比VC获得更多的犬齿旋转。犬齿远端（Pa 0.6 vs C 0.55 mm）和远端冠倾（Pa 10.9°vs C 8.99°）的RMSE在Pa组略高于对照组。相反，狗狗在犬类旋转中表现出更好的准确性。对于锚定，Pa和控制表现出明显大于虚拟的实际中和和中倾。在Pa和对照组之间，锚定化和中端倾倒的RMSE是相当的。结论：使用Pa进行初步的犬齿内收会导致远端冠倾斜的误差更大，但旋转比对照组小。试验注册：ISRCTN 14020146，由国际标准随机对照试验注册中心注册。

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来源期刊

Orthodontics & Craniofacial Research 医学-牙科与口腔外科

CiteScore

5.30

自引率

3.20%

发文量

审稿时长

>12 weeks

期刊介绍： Orthodontics & Craniofacial Research - Genes, Growth and Development is published to serve its readers as an international forum for the presentation and critical discussion of issues pertinent to the advancement of the specialty of orthodontics and the evidence-based knowledge of craniofacial growth and development. This forum is based on scientifically supported information, but also includes minority and conflicting opinions. The objective of the journal is to facilitate effective communication between the research community and practicing clinicians. Original papers of high scientific quality that report the findings of clinical trials, clinical epidemiology, and novel therapeutic or diagnostic approaches are appropriate submissions. Similarly, we welcome papers in genetics, developmental biology, syndromology, surgery, speech and hearing, and other biomedical disciplines related to clinical orthodontics and normal and abnormal craniofacial growth and development. In addition to original and basic research, the journal publishes concise reviews, case reports of substantial value, invited essays, letters, and announcements. The journal is published quarterly. The review of submitted papers will be coordinated by the editor and members of the editorial board. It is policy to review manuscripts within 3 to 4 weeks of receipt and to publish within 3 to 6 months of acceptance.