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

Rui Zhao

Rui Zhao

  • State Key Laboratory of Oral Diseases & National Clinical Research Centre for Oral Diseases, Department of Orthodontics, West China Hospital of Stomatology, Sichuan UniversityChengdu, Sichuan Province, China
  • Department of Stomatology, The First Affiliated Hospital of Zhengzhou UniversityZhengzhou, Henan province, China
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Zhao, Rui
, 
Li Mei

Li Mei

Discipline of Orthodontics, Department of Oral Sciences, Faculty of Dentistry, University of OtagoDunedin, New Zealand
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Mei, Li
, 
Hu Long

Hu Long

State Key Laboratory of Oral Diseases & National Clinical Research Centre for Oral Diseases, Department of Orthodontics, West China Hospital of Stomatology, Sichuan UniversityChengdu, Sichuan Province, China
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Long, Hu
, 
Fan Jian

Fan Jian

State Key Laboratory of Oral Diseases & National Clinical Research Centre for Oral Diseases, Department of Orthodontics, West China Hospital of Stomatology, Sichuan UniversityChengdu, Sichuan Province, China
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Jian, Fan
 und 
Wenli Lai

Wenli Lai

State Key Laboratory of Oral Diseases & National Clinical Research Centre for Oral Diseases, Department of Orthodontics, West China Hospital of Stomatology, Sichuan UniversityChengdu, Sichuan Province, China
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Lai, Wenli
  
27. Jan. 2023
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Online veröffentlicht: 27. Jan. 2023
Seitenbereich: 1 - 12
Eingereicht: 01. Aug. 2022
Akzeptiert: 01. Dez. 2022
DOI: https://doi.org/10.2478/aoj-2023-0002
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© 2023 Rui Zhao et al., published by Sciendo
This work is licensed under the Creative Commons Attribution 4.0 International License.

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
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Englisch
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