An observational study in Dental Crowding and Malocclusion, Angle Class I, sponsored by Al-Azhar University. Completed at 1 site in Egypt. Open to female participants aged 13 Years to 18 Years. Per ClinicalTrials.gov, last updated 2026-08-05.
Sponsored by Al-Azhar University · Observational
The primary aim of the current study was to estimate the validity, reliability, and repeatability of LII measurements
the primary aim of the current study was to estimate the validity, reliability, and repeatability of LII measurements made directly on digital models compared to those made on traditional plaster models. As a secondary aim, the same comparisons will also performed between digital photographs of study models and their corresponding plaster models.
88 studies on the registry are indexed under Crowding; 22 are open to participants now.
This study's enrollment of 20 is below the median of 664 across 14 observational studies indexed under Crowding.
Browse Crowding studies →Al-Azhar University is the lead sponsor of 531 studies on the registry; 172 are open to participants now.
Of its 5 completed or terminated interventional studies of FDA-regulated products, 0 (0%) have results posted.
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Study models with their corresponding direct digital intra-oral models and photos are obtained from Egyptian females patients from Cairo_Patients are medical free from systemic disease with age range 13-18 years suffering from mild to moderate anterior teeth crowding with class I malocclusion
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Exclusion criteria:
validity, reliability, and repeatability of Little's Irregularity Index measurements
the primary aim of the current study was to estimate the validity, reliability, and repeatability of LII measurements made directly on digital models compared to those made on traditional plaster models
Time frame: 3 months
Plan to share: Yes — After complection of the current study
Supporting information: Study protocol, Statistical analysis plan, Informed consent form, Clinical study report, Analytic code
This study is completed, as verified in Aug 2026. You cannot join it, but the record below documents what was studied.
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