CClinicalTrials.gg
Active, not recruitingNCT06933979Updated Apr 18, 2025

Positional Changes of Mandibular Molar After Orthodontic Treatment

An observational study in Third Molar, sponsored by Fayoum University. Active, not recruiting at 1 site in Egypt. Open to participants aged 14 Years to 18 Years. Per ClinicalTrials.gov, last updated 2025-04-18.

Sponsored by Fayoum University · Observational

From the registry’s dates

  • Primary completion was expected by Apr 2025, 1 year 5 months ago, but the record still lists the study as active, not recruiting.
Study type
Observational
Model
Cohort
Time perspective
Retrospective
Enrollment
30
Ages
14 Years to 18 Years
Sex
All
01

Study summary

This retrospective study was carried out on pre and posttreatment digital standardized panoramic radiographs of 30 cases previously orthodontically treated with four first premolar extraction.

02

Conditions studied

  • Third Molar

Keywords

  • orthodontic treatment
  • premolar extraction
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In context

Lead sponsor

Fayoum University is the lead sponsor of 144 studies on the registry; 41 are open to participants now.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
14 Years to 18 Years
Sexes eligible
All
Sampling method
Non-probability sample

Study population

Sample size calculation estimated the minimum total required sample size (n) was found to be (27). The sample size was increased to (30) account for sample variability and to improve the robustness of statistical testing

Inclusion criteria

  • class I malocclusion cases (0 \< ANB \< 4) with moderate crowding

Exclusion criteria

Exclusion Criteria:

  • Absence of all permanent teeth including mandibular third molars.
05

Study design

Observational model
Cohort
Time perspective
Retrospective
Enrollment
30 participants (actual)
Patient registry
No
06

What researchers measure

Primary outcomes

  1. Assessment of mandibular third molar positional variation

    measure angles:• LA-ISL: The inward angle (towards the 2nd molar) between long axis of mandibular third molar and the inter-sigmoid line (line connecting the deepest point of the right and left sigmoid notch of the mandible). • LA-IMB: The inward angle between long axis of mandibular third molar and the inferior border of the mandible.

    Time frame: 2 years

07

Study locations

1 site
  • Fayoum University
    Fayoum, 63514, Egypt
08

References and documents

Publications

  • Zarin DA, Tse T, Williams RJ, Califf RM, Ide NC. The ClinicalTrials.gov results database--update and key issues. N Engl J Med. 2011 Mar 3;364(9):852-60. doi: 10.1056/NEJMsa1012065. PubMed 21366476 ↗

Individual participant data

Plan to share: Undecided

09

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Apr 18, 2025, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT06933979
Lead sponsor
Fayoum University
Responsible party
Shereen Aly El-Mahlawy (lecturer, Fayoum University) — Principal investigator
First posted
Apr 18, 2025
Start date
Feb 23, 2025
Primary completion
Apr 20, 2025 (estimated)
Completion
Apr 25, 2025 (estimated)
Last update
Apr 18, 2025

Study contacts

Shereen A Mahlawy, PHD
principal investigator · lecturer of orthodontics, faculty of dentistry, Fayoum university
clinical cT trial
study director · Clinical trials.gov

Oversight

Data monitoring committee
Yes
FDA-regulated drug
No
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

Not currently enrolling

This study is active, not recruiting, as verified in Apr 2025. You cannot join it, but the record below documents what was studied.

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