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Not yet recruitingNCT04229797Updated Feb 7, 2024

Mandibular First Molar Distalization

An interventional study of Mandibular distalization using extra-radicular miniscrews in Class III Malocclusion, sponsored by Cairo University. Not yet recruiting at 1 site in Egypt. Open to participants aged 16 Years to 24 Years, including healthy volunteers. Per ClinicalTrials.gov, last updated 2024-02-07.

Sponsored by Cairo University · Not applicable, Interventional, and Treatment

From the registry’s dates

  • Primary completion was expected by Feb 2025, 1 year 9 months ago, but the record still lists the study as not yet recruiting.
Phase
Not applicable
Study type
Interventional
Enrollment
20
Allocation
Randomized
Ages
16 Years to 24 Years
Sex
All
01

Study summary

A clinical study to test the capability of the mini-screws inserted in the Mandibular buccal shelf area as an anchorage unit to distalize mandibular first molar for correction of mild to moderate Class III cases. The second aim was to detect if there is a difference in the amount of distalization in the presence of unerupted mandibular third molars, using the same technique.

Read the detailed description

Class III malocclusion in adults is one of the most complex malocclusions in clinical orthodontics. For adults, the ideal treatment option for Class III malocclusion is accomplished either by camouflage treatment in mild to moderate cases or orthognathic surgery in severe cases. Camouflage treatment for Class III malocclusion comprises three main techniques; Class III elastics, mandibular first molar distalization, or extraction of mandibular first premolars. Mandibular first molar distalization via the use of skeletal anchorage has the problem of increased failure rate of the inter-radicular temporary anchorage devices (TADs). Accordingly, a randomized clinical trial using extra radicular TADs in the Mandibular buccal shelf area was designed in the current research aiming to test the efficacy of such a technique in inducing mandibular molar distalization with decreased failure rate, and whether the presence of unerupted mandibular third molars will affect the distalization movement or not.

02

Conditions studied

  • Class III Malocclusion

Keywords

  • Class III malocclusion
  • Mandibular buccal shelf
  • Mini-screws
  • Extra-radicular mini-screws
  • Distalization
  • Temporary Anchorage device
03

In context

Malocclusion, Angle Class III

57 studies on the registry are indexed under Malocclusion, Angle Class III; 11 are open to participants now.

This study's planned enrollment of 20 is below the median of 32 across 53 interventional studies indexed under Malocclusion, Angle Class III.

Browse Malocclusion, Angle Class III studies →

Lead sponsor

Cairo University is the lead sponsor of 4,941 studies on the registry; 1,458 are open to participants now.

Of its 37 completed or terminated interventional studies of FDA-regulated products, 5 (14%) have results posted.

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

04

Who can participate

Ages eligible
16 Years to 24 Years
Sexes eligible
All
Accepts healthy volunteers
Yes

Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.

Inclusion criteria

  • Class III dental incisal relation.
  • Dental canine and molar relation not more than half unit Class III.
  • Presence of unerupted mandibular third molars on both sides.
  • Skeletal Class I or mild Class III.
  • Full Permanent dentition.
  • Medically free subjects.

Exclusion criteria

Exclusion Criteria:

  • Patients with systemic diseases or neuromuscular disorders.
  • Retroclined lower incisors.
  • Sever skeletal dysplasia.
  • Patients with periodontal disease.
05

Study design

Phase
Not applicable
Primary purpose
Treatment
Allocation
Randomized
Intervention model
Parallel assignment
Masking
None (open label)
Enrollment
20 participants (estimated)

Study arms

  • Active comparator
    Comparator

    Extraction of the unerupted third molars before distalization of mandibular first molar using Mandibular buccal shelf mini-screws.

    Procedure: Mandibular distalization using extra-radicular miniscrews

  • Experimental
    Intervention

    Leaving the unerupted third molars and distalizing using Mandibular buccal shelf mini-screws.

    Procedure: Mandibular distalization using extra-radicular miniscrews

Interventions

  • ProcedureMandibular distalization using extra-radicular miniscrews

    Distalization of the Mandibular first molars using mandibular buccal shelf mini-screws in the presence of unerupted third molars

06

What researchers measure

Primary outcomes

  1. Dental effect

    Amount of first mandibular molar distalization (mm) in the two groups, A cephalometric of pre and post distalization digital cephalograms will be traced, landmarks and reference lines will be determined; skeleto-dental and soft tissue measurements will be performed using Quick-Ceph program . Digital models of pre and post distalization will be superimposed and measured for dental changes using Anatomage program.

    Time frame: 6 months

Secondary outcomes

  1. Skeletal and soft tissue effect

    Skeletal and soft tissue changes post distalization, A cephalometric of pre and post distalization digital cephalograms will be traced, landmarks and reference lines will be determined; skeleto-dental and soft tissue measurements will be performed using Quick-Ceph program.

    Time frame: 6 months

07

Study locations

1 site
08

References and documents

Individual participant data

Plan to share: No

No publications or documents are linked to this record.

09

Timeline

Tracking since Sep 25, 2026
ElapsedEstimatedEstimated, not yet reachedSimilar studies: half by the dot; the band is the middle halfHalf of similar studies reached it by the dot; the band is the middle half, from a quarter to three quarters

Start is estimated for Dec 2024; primary completion for Feb 2025, 2 months later.

Of 37 non-industry interventional studies with no phase under Malocclusion, Angle Class III, half reached primary completion within 13 months of starting (the median), counting those still running; a quarter within 10 and three quarters within 26. This study's planned 2 months is below that.

Counting every sponsor, half of 38 studies reached it within 13 months; a quarter within 10 and three quarters within 26.

How these figures are worked out, and which studies are left out of them.

Registered
Jan 10, 2020
First posted
Jan 18, 2020
StartEst.
Dec 2024
Primary completionEst.
Feb 2025
CompletionEst.
Mar 2025
Last update
Feb 7, 2024
What these dates mean
Start.
When the first participant enrolled; while estimated, when the study expects to open to recruitment.
Primary completion.
When the last participant was examined or treated to collect data for the study's main question, its primary outcome. A study that stopped early gives the date its data collection stopped.
Completion.
When the last participant's last visit took place, for every outcome, secondary ones and side effects included: the end of the study. Often later than primary completion, sometimes the same day.
Actual and Est.
Actual means the registry says the date has happened. Est. (estimated) is a date the sponsor plans or expects. It can still move, and the sponsor is expected to change it to actual once it has passed.
No changes since tracking began. The registry record was last updated on Feb 7, 2024, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT04229797
Lead sponsor
Cairo University
Responsible party
Mohamed Khaled Makhlouf (Associate researcher NRC, Cairo University) — Principal investigator
First posted
Jan 18, 2020
Start date
Dec 2024 (estimated)
Primary completion
Feb 2025 (estimated)
Completion
Mar 2025 (estimated)
Last update
Feb 7, 2024

Study contacts

Mohamed Kh Makhlouf
Contact
mmakhlouf@gmail.com
=201001405334
Mostafa Mo Eldawlatly, Lecturer
Contact
mostafaeldawlatly@gmail.com
+201006619898

Oversight

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

Not currently enrolling

This study is not yet recruiting, as verified in Feb 2024. You cannot join it, but the record below documents what was studied.

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