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Related Concept Videos

Blind Procedures02:07

Blind Procedures

Ideally, the people who observe and record the children’s behavior are unaware of who was assigned to the experimental or control group, in order to control for experimenter bias. Experimenter bias refers to the possibility that a researcher’s expectations might skew the results of the study. Remember, conducting an experiment requires a lot of planning, and the people involved in the research project have a vested interest in supporting their hypotheses. If the observers knew which child was...

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How well does Invisalign ClinCheck predict actual results: A prospective study.

Luis Huanca Ghislanzoni1,2, Zamira Kalemaj3, Maurizio Manuelli4,5,6,7

  • 1Department of Orthodontics, University of Geneva, Geneva, Switzerland.

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This study compared actual tooth movements to planned movements after 28 weeks of Invisalign Lite treatment. Results showed inaccuracies in torque, tip, and rotation, indicating a need for refinement in clear aligner therapy planning.

Keywords:
ClinCheckInvisalign Liteclear alignerstooth movements

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Area of Science:

  • Orthodontics
  • Dental Technology
  • Biomedical Engineering

Background:

  • Clear aligner therapy, including Invisalign Lite, is increasingly popular for orthodontic treatment.
  • Assessing the accuracy of tooth movement prediction in clear aligner therapy is crucial for treatment success.

Purpose of the Study:

  • To compare achieved tooth movements with predicted movements after 28 weeks of Invisalign Lite treatment.
  • To evaluate the performance of Invisalign Lite in achieving planned torque, tip, and rotation.

Main Methods:

  • Digital impressions of 21 subjects treated with Invisalign Lite were analyzed.
  • Tooth movement accuracy was assessed by comparing actual movements (T1) to predicted movements (ClinCheck setup) from baseline (T0).
  • Variables included differences between obtained and planned torque, tip, rotation, and transverse linear changes.

Main Results:

  • Torque expression was least accurate for maxillary and mandibular central incisors.
  • Tip and rotation accuracy varied across teeth, with under-expression noted for several maxillary and mandibular teeth.
  • Transverse linear changes were generally accurate, with overperformance in first molars.

Conclusions:

  • Significant differences exist between planned and achieved torque for maxillary central incisors.
  • Rotational corrections for most teeth showed discrepancies between planned and obtained outcomes.
  • The study highlights areas for improvement in the predictability and execution of clear aligner treatment planning.