Effects of Clear Aligners Versus Fixed Appliances on Occlusion After Treatment of Mild Anterior Crowding

May 9, 2026 updated by: Moaz Hafez Abdelrahman Hafez, Al-Azhar University

Effects of Clear Aligners Versus Fixed Appliances on Occlusion After Treatment of Mild Anterior Crowding: A T-scan Study.

The aim of this study is to evaluate effects of clear aligners versus fixed appliances on occlusion after treatment of mild anterior crowding a T-scan study.

Study Overview

Status

Completed

Conditions

Intervention / Treatment

Detailed Description

Intervention:

Group 1. Patients treated with clear aligner. Patients with mild anterior crowding will be treated with non-extraction treatment using clear aligners.

Group 2. Patients treated with fixed appliance. Patients with mild anterior crowding will be treated with non-extraction treatment using fixed appliances.

Observations:

Multi-bite closure in centric occlusion using T-Scan® recordings were obtained before and after treatment from each subject to measure the occlusal parameters to be analyzed during this study.

Study Type

Interventional

Enrollment (Actual)

12

Phase

  • Not Applicable

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • Egypt
    • Nasr City
      • Cairo, Nasr City, Egypt, 11765
        • Al Azhar University

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

14 years to 19 years (Child, Adult)

Accepts Healthy Volunteers

Yes

Description

Inclusion Criteria:

  • Patients between the age (14-22 years).
  • Fully erupted permanent dentition, 3rd molars excluded.
  • Healthy, compliant, and motivated patients who can visit the department regularly.
  • Non-extraction treatment.
  • Class I with mild anterior crowding lower and/ or upper.
  • Good oral and general health.

Exclusion Criteria:

  • Previous orthodontic treatment.
  • Craniofacial abnormalities, congenital syndromes of the craniofacial area.
  • Anterior or posterior crossbite.
  • Anterior or lateral open bite.
  • Poor oral hygiene or periodontally compromised patient.

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Other
  • Allocation: Randomized
  • Interventional Model: Parallel Assignment
  • Masking: None (Open Label)

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Active Comparator: Group B
Device: Fixed appliances
Patients with mild anterior crowding will be treated with non-extraction treatment using fixed appliances.
Active Comparator: Group A
Device: Clear aligners
Patients with mild anterior crowding will be treated with non-extraction treatment using clear aligners.

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Distribution of occlusal forces
Time Frame: 1 Year and 6 Months
Amount of magnitude of occlusal forces after treatment by clear aligners
1 Year and 6 Months
Distribution of occlusal forces
Time Frame: 1 Year and 6 Months
Amount of magnitude of occlusal forces after treatment by fixed appliances
1 Year and 6 Months

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Al-Azhar University

Investigators

  • Principal Investigator: Moaz Hafez Abdelrhman, Master, Al-Azhar University

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

General Publications

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Actual)

May 1, 2024

Primary Completion (Actual)

March 1, 2026

Study Completion (Actual)

April 1, 2026

Study Registration Dates

First Submitted

February 6, 2023

First Submitted That Met QC Criteria

February 20, 2023

First Posted (Actual)

February 21, 2023

Study Record Updates

Last Update Posted (Actual)

May 13, 2026

Last Update Submitted That Met QC Criteria

May 9, 2026

Last Verified

May 1, 2026

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • 893/2838

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

YES

IPD Plan Description

The aim of this study is to evaluate effects of clear aligners versus fixed appliances on occlusion after treatment of mild anterior crowding a T-scan study.

IPD Sharing Time Frame

1 Year and 6 Months

IPD Sharing Supporting Information Type

  • STUDY_PROTOCOL

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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