Evaluation of Intraoral Scanning vs Conventional Impression in Assessing Dental Crowding

The purpose of this study is to evaluate and compare the effectiveness and efficiency of Intraoral Scanning (IOS) versus conventional impressions in assessing dental crowding among a group of Egyptian children. Accurate space analysis and crowding assessment are essential for pediatric orthodontic planning. Intraoral scanners offer a digital alternative that may improve patient comfort and reduce procedure time compared to traditional alginate impressions. This observational cross-sectional study aims to provide clinical evidence regarding the validity of digital impression techniques in pediatric dental settings.

Inclusion Criteria: 1. Egyptian children aged 11-13 years 2. Dental crowding ≥ 2 mm in at least one arch, determined by space analysis (arch length discrepancy). Crowding will be calculated as the difference between the sum of mesiodistal tooth widths and the available arch perimeter measured on the diagnostic cast. A discrepancy ≥ 2 mm will be considered clinically significant 3. Fully erupted permanent teeth (first molar to first molar) 4. No previous orthodontic treatment Exclusion Criteria: 1. Craniofacial anomalies 2. Missing or grossly restored teeth 3. Uncooperative behavior