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Treatment outcomes of clear aligners in the mixed dentition Sarfraz, Mohymen
Abstract
Objectives: Align Technology Inc introduced its mixed dentition clear aligners in 2018. Since the advent of Invisalign First System (IFS) is relatively new, not much data is available regarding its treatment efficacy and predictability of results. Knowing the success rate of different orthodontic treatment modalities and their limitations is critically important for the success of an orthodontist as a clinician and for patient welfare. The purpose of this study is to determine whether the final achieved tooth movements are coherent with clear aligner ClinCheck predictions in mixed dentition. Methods: This retrospective study consisted of 39 (20 females and 19 males) patients who were consecutively treated with IFS in their mixed dentitions. The mean age was 8.9 years and ranged from 6.9 to 11.2 years, with an average treatment time of 8 months. Pre-treatment, post-treatment achieved, and post-treatment predicted digital models were superimposed. The predicted and achieved overjet, overbite, intercanine width, intermolar width, and three-dimensional (3D) tooth movements of upper first molars were measured. The differences between the achieved and the predicted tooth movement were tested with either paired t-test or Wilcoxon Signed Rank test. Results: The predicted values for the overbite, intercanine width, and intermolar width were significantly greater than achieved values (P < .05). While, in terms of 3D angulation and translation tooth movements, the results showed no statistically significant difference. Conclusions: For treatment in mixed dentition with IFS, predictable outcomes are achieved for 3D tooth movements in maxillary first permanent molars and overjet, however overcorrection is recommended for overbite, intercanine and intermolar width.
Item Metadata
| Title |
Treatment outcomes of clear aligners in the mixed dentition
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| Creator | |
| Supervisor | |
| Publisher |
University of British Columbia
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| Date Issued |
2023
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| Description |
Objectives: Align Technology Inc introduced its mixed dentition clear aligners in 2018. Since the advent of Invisalign First System (IFS) is relatively new, not much data is available regarding its treatment efficacy and predictability of results. Knowing the success rate of different orthodontic treatment modalities and their limitations is critically important for the success of an orthodontist
as a clinician and for patient welfare. The purpose of this study is to determine whether the final achieved tooth movements are coherent with clear aligner ClinCheck predictions in mixed dentition.
Methods: This retrospective study consisted of 39 (20 females and 19 males) patients who were consecutively treated with IFS in their mixed dentitions. The mean age was 8.9 years and ranged from 6.9 to 11.2 years, with an average treatment time of 8 months. Pre-treatment, post-treatment
achieved, and post-treatment predicted digital models were superimposed. The predicted and achieved overjet, overbite, intercanine width, intermolar width, and three-dimensional (3D) tooth movements of upper first molars were measured. The differences between the achieved and the predicted tooth movement were tested with either paired t-test or Wilcoxon Signed Rank test.
Results: The predicted values for the overbite, intercanine width, and intermolar width were significantly greater than achieved values (P < .05). While, in terms of 3D angulation and translation tooth movements, the results showed no statistically significant difference.
Conclusions: For treatment in mixed dentition with IFS, predictable outcomes are achieved for 3D tooth movements in maxillary first permanent molars and overjet, however overcorrection is recommended for overbite, intercanine and intermolar width.
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| Genre | |
| Type | |
| Language |
eng
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| Date Available |
2023-07-18
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| Provider |
Vancouver : University of British Columbia Library
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| Rights |
Attribution-NonCommercial-NoDerivatives 4.0 International
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| DOI |
10.14288/1.0434233
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| URI | |
| Degree | |
| Program | |
| Affiliation | |
| Degree Grantor |
University of British Columbia
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| Graduation Date |
2023-11
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| Campus | |
| Scholarly Level |
Graduate
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| Rights URI | |
| Aggregated Source Repository |
DSpace
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Rights
Attribution-NonCommercial-NoDerivatives 4.0 International