<abstract xmlns="http://www.w3.org/1999/xhtml">

<sec>
<h3>Objectives:</h3>
<p>To compare 10-day and 14-day change regimens to achieve orthodontic tooth movement (OTM) in patients wearing clear aligners and to determine their subsequent pain perception.</p>
</sec>
<sec>
<h3>Material and methods:</h3>
<p>A total of 175 clear aligner patients were assessed for eligibility. Seventy-two patients were randomly assigned to a 10-day group (<italic>N</italic> = 36) and a 14-day group (<italic>N</italic> = 36) and were instructed to change the appliances every 10 or 14 days, respectively. OTM efficacy and OTM variation between the actual and predicted OTM digital models measured by shell-to-shell deviation, as well as pain perception determined by a visual analog scale (VAS), were assessed at T0 (baseline, before the placement of the aligners), T1 (stage 8, after completion of aligners #8), and T2 (stage 16, after completion of aligners #16).</p>
</sec>
<sec>
<h3>Results:</h3>
<p>The 10-day and 14-day groups showed similar OTM efficacy at both T1 and T2 for all types of tooth movements (<italic>p</italic> > 0.09 for all) and similar OTM shell-to-shell deviation at T1 (<italic>p</italic> = 0.06) and T2 (<italic>p</italic> = 0.22). The two groups also had similar VAS scores of pain perception throughout the study (<italic>p</italic> > 0.05 for all).</p>
</sec>
<sec>
<h3>Conclusion:</h3>
<p>The 10-day and 14-day groups showed similar tooth movement and pain perception, suggesting that the clear aligners may be changed every 10 days without a significant compromise in the clinical efficacy of OTM and patient comfort.</p>
</sec>
<sec>
<h3>Trial registration:</h3>
<p>ChiCTR, ChiCTR-IOR-15007532. Registered 17 November 2015, <ext-link ext-link-type="uri" xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="https://www.chictr.org.cn/showproj.aspx?proj=12500">https://www.chictr.org.cn/showproj.aspx?proj=12500</ext-link></p>
</sec>
</abstract>

Objectives:
To compare 10-day and 14-day change regimens to achieve orthodontic tooth movement (OTM) in patients wearing clear aligners and to determine their subsequent pain perception.


Material and methods:
A total of 175 clear aligner patients were assessed for eligibility. Seventy-two patients were randomly assigned to a 10-day group (N = 36) and a 14-day group (N = 36) and were instructed to change the appliances every 10 or 14 days, respectively. OTM efficacy and OTM variation between the actual and predicted OTM digital models measured by shell-to-shell deviation, as well as pain perception determined by a visual analog scale (VAS), were assessed at T0 (baseline, before the placement of the aligners), T1 (stage 8, after completion of aligners #8), and T2 (stage 16, after completion of aligners #16).


Results:
The 10-day and 14-day groups showed similar OTM efficacy at both T1 and T2 for all types of tooth movements (p > 0.09 for all) and similar OTM shell-to-shell deviation at T1 (p = 0.06) and T2 (p = 0.22). The two groups also had similar VAS scores of pain perception throughout the study (p > 0.05 for all).


Conclusion:
The 10-day and 14-day groups showed similar tooth movement and pain perception, suggesting that the clear aligners may be changed every 10 days without a significant compromise in the clinical efficacy of OTM and patient comfort.


Trial registration:
ChiCTR, ChiCTR-IOR-15007532. Registered 17 November 2015, https://www.chictr.org.cn/showproj.aspx?proj=12500

Changing clear aligners every 10 days or 14 days ? A randomised controlled trial

Australasian Orthodontic Journal

This work is licensed under the Creative Commons Attribution 4.0 International License.

{"article-title":"Changing clear aligners every 10 days or 14 days ? A randomised controlled trial"}

Objectives:
To compare 10-day and 14-day change regimens to achieve orthodontic tooth movement (OTM) in patients wearing clear aligners and to determine their...

Changing clear aligners every 10 days or 14 days ? A randomised controlled trial

Published Online: Jan 27, 2023

Page range: 1 - 12

Received: Aug 01, 2022

Accepted: Dec 01, 2022

DOI: https://doi.org/10.2478/aoj-2023-0002

© 2023 Rui Zhao et al., published by Sciendo

This work is licensed under the Creative Commons Attribution 4.0 International License.