# Assessment of Root Parallelism Following Orthodontic Treatment in Adolescent vs Adult Patients Treated With Maxillary First Premolar Extraction

> **NCT04139174** · — · UNKNOWN · sponsor: **Cairo University** · enrollment: 180 (estimated)

## Conditions studied

- Frequency of Root Paralellism

## Interventions

- **PROCEDURE:** first premolar extraction and complete canine retraction.

## Key facts

- **NCT ID:** NCT04139174
- **Lead sponsor:** Cairo University
- **Sponsor class:** OTHER
- **Phase:** —
- **Study type:** OBSERVATIONAL
- **Status:** UNKNOWN
- **Start date:** 2019-11-01
- **Primary completion:** 2020-06-01
- **Final completion:** 2020-09-01
- **Target enrollment:** 180 (ESTIMATED)
- **Last updated:** 2019-10-28


## Primary source

ClinicalTrials.gov registry: https://clinicaltrials.gov/study/NCT04139174

## Citation

> US National Library of Medicine, ClinicalTrials.gov registration NCT04139174, "Assessment of Root Parallelism Following Orthodontic Treatment in Adolescent vs Adult Patients Treated With Maxillary First Premolar Extraction". Retrieved via AI Analytics 2026-05-28 from https://api.ai-analytics.org/clinical/NCT04139174. Licensed CC0.

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