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RecruitingNCT06011382Updated Aug 25, 2023

Maxillary Molar Distalization Supported by Mini-implants With the Advanced Molar Distalization Appliance (Amda®)

An interventional study of Advanced Molar Distalization Appliance (amda®) and Buccal mini-implants in Angle Class II, sponsored by Grigore T. Popa University of Medicine and Pharmacy. Recruiting at 1 site in Romania. Open to participants aged 14 Years to 20 Years, including healthy volunteers. Per ClinicalTrials.gov, last updated 2023-08-25.

Sponsored by Grigore T. Popa University of Medicine and Pharmacy · Not applicable, Interventional, and Treatment

From the registry’s dates

  • Primary completion was expected by Jun 2024, 2 years 4 months ago, but the record still lists the study as recruiting.
  • Registered 11 months after the study started (first participant enrolled Jun 2022, registered Jun 2023).
  • Started Jun 2022; still recruiting 4 years 4 months later.
Phase
Not applicable
Study type
Interventional
Enrollment
16
Allocation
Randomized
Ages
14 Years to 20 Years
Sex
All
01

Study summary

The aim of this randomized controlled clinical trial is to evaluate the dentoalveolar and skeletal treatment effects of the AMDA when used for distalization of the maxillary first molars in patients with Class II malocclusion in the permanent dentition.

Read the detailed description

The primary aim is to evaluate two different treatment groups from initiation of treatment up until completion of maxillary molar distalization of:

  • Group I: patients treated with amda®
  • Group II: patients treated with buccal mini-implants

More specifically to evaluate the efficiency of the AMDA using lateral cephalograms and digital 3D model casts of the patients under investigation at the following time points:

  • point T0: baseline data - before initiation of the treatment
  • point T1: immediately after distalization (8-12 months)
02

Conditions studied

  • Angle Class II

Keywords

  • amda®
  • maxillary molar distalization
  • randomized controlled trial
  • orthodontics
03

In context

Malocclusion, Angle Class II

124 studies on the registry are indexed under Malocclusion, Angle Class II; 19 are open to participants now.

This study's planned enrollment of 16 is below the median of 34 across 115 interventional studies indexed under Malocclusion, Angle Class II.

Browse Malocclusion, Angle Class II studies →

Lead sponsor

Grigore T. Popa University of Medicine and Pharmacy is the lead sponsor of 32 studies on the registry; 9 are open to participants now.

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

04

Who can participate

Ages eligible
14 Years to 20 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

  • All patients to have permanent dentition
  • with or without the 2nd molar erupted
  • bilateral Class II molar relationships (a quarter to 1 molar cusp).

Exclusion criteria

Exclusion Criteria:

  • Past orthodontic treatment
  • crossbites,
  • severe carious lesions,
  • poor oral hygiene,
  • mobility of the maxillary first molars,
  • anterior open bites,
  • vertical growth pattern,
  • tongue habits.
05

Study design

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

Study arms

  • Active comparator
    patients treated with amda®

    two different treatment groups will be evaluated, from initiation of treatment until completion of maxillary molar distalization.

    Device: Advanced Molar Distalization Appliance (amda®)

  • Active comparator
    patients treated with buccal mini-implants

    from initiation of treatment until completion of maxillary molar distalization.

    Device: Buccal mini-implants

Interventions

  • DeviceAdvanced Molar Distalization Appliance (amda®)

    AMDA is a prefabricated device anchored to the palate by miniscrews and it is a noncompliance appliance for maxillary molar distalization

  • DeviceBuccal mini-implants

    Buccal mini-implants for maxillary molar distalization

06

What researchers measure

Primary outcomes

  1. Anteroposterior position changes of upper first molars.

    Anteroposterior position movement in mm of the upper first molars

    Time frame: 8-12 months

  2. Measurements on the lateral cephalograms and digital 3D model casts.

    Angular measurements of the lateral cephalograms and digital models

    Time frame: 8-12 months

  3. Measurements on the lateral cephalograms and digital 3D model casts.

    Linear measurements of the lateral cephalograms and digital models

    Time frame: 8-12 months

07

Study locations

1 of 1 sites recruiting
08

References and documents

Individual participant data

Plan to share: No — The data will be availaible upon request

No publications or documents are linked to this record.

09

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Aug 25, 2023, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT06011382
Lead sponsor
Grigore T. Popa University of Medicine and Pharmacy
Responsible party
Nikolaos Karvelas (Principal Investigator, Grigore T. Popa University of Medicine and Pharmacy) — Principal investigator
First posted
Aug 25, 2023
Start date
Jun 20, 2022
Primary completion
Jun 20, 2024 (estimated)
Completion
Jun 20, 2025 (estimated)
Last update
Aug 25, 2023

Study contacts

Nikolaos Karvelas, PhD student
Contact
karvelas93@gmail.com
+40 759481645
Nikolaos Karvelas, PhD student
principal investigator · Grigore T Popa University, Department of Orthodontics

Oversight

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

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