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CompletedNCT06638983Updated Oct 15, 2024

Effectives of Non-extraction Orthodontic Treatment of Angle Class I Malocclusion

An interventional study of Non-extraction Orthodontic Treatment of Angle Class I Malocclusion in Angle Class I, sponsored by Can Tho University of Medicine and Pharmacy. Completed at 1 site in Vietnam. Open to participants aged 15 Years to 25 Years, including healthy volunteers. Per ClinicalTrials.gov, last updated 2024-10-15.

Sponsored by Can Tho University of Medicine and Pharmacy · Not applicable, Interventional, and Other

From the registry’s dates

  • Registered 4 years 4 months after the study started (first participant enrolled May 2020, registered Oct 2024).
Phase
Not applicable
Study type
Interventional
Enrollment
41
Allocation
Not applicable
Ages
15 Years to 25 Years
Sex
All
01

Study summary

Introduction: The investigators aimed to evaluate the effectiveness of non-extraction orthodontic treatment for Angle class I malocclusion.

Read the detailed description

Many people are also concerned about their oral health. When social communication is more important, aesthetic concerns also receive a lot of attention. A beautiful smile can boost self-assurance and empathy. Angle class I malocclusion is prevalent, and dental malocclusion is a significant percentage of the population at all ages . Tooth extraction is a controversial topic in orthodontics, with the general view being against it. Angle and his students argued against it, but Charles Tweed saw recurrence in the 1930s after retreatment without extraction and retreatment with extraction. The use of tooth extraction therapy increased in the 1960s but has become less common since the late 20th century. The science of orthodontics has made significant advancements under the principle of least invasiveness, but the debate remains about whether to consider tooth extraction. The contemporary view believes that the majority of patients may and should be treated without tooth extraction, but in rare circumstances, extraction is necessary to make up for crowding and excessive incisor protrusion that harm the beauty. In truth, each individual must be thoroughly evaluated in light of their bite, cosmetic condition, and stability in the wake of therapy before any course of action is recommended. The investigators aimed to evaluate the effectiveness of non-extraction orthodontic treatment for Angle class I malocclusion.

02

Conditions studied

  • Angle Class I

Keywords

  • Non-extraction
  • orthodontics treatment
  • Angle class I malocclusion
03

In context

Malocclusion, Angle Class I

35 studies on the registry are indexed under Malocclusion, Angle Class I; 10 are open to participants now.

This study's enrollment of 41 is above the median of 32 across 31 interventional studies indexed under Malocclusion, Angle Class I.

Browse Malocclusion, Angle Class I studies →

Lead sponsor

Can Tho University of Medicine and Pharmacy is the lead sponsor of 35 studies on the registry; 8 are open to participants now.

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

04

Who can participate

Ages eligible
15 Years to 25 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

  • Patients (≥ 15 years) with indicated Angle class I malocclusion and missing space ≤9mm
  • Cervical vertebral maturation stages 5, 6, (CS5, CS6): cervical vertebrae 2, 3, and 4 have a concave curved lower border and have at least one rectangle C3, C4 cervical vertebra upright or at least square
  • No prior orthodontic treatment
  • Fully erupted permanent teeth (except third molars)
  • Voluntary research participation

Exclusion criteria

Exclusion Criteria:

Face soft tissue surgical procedures, periodontal disease, and maxillofacial congenital anomalies

05

Study design

Phase
Not applicable
Primary purpose
Other
Allocation
Not applicable
Intervention model
Single group
Masking
None (open label)
Enrollment
41 participants (actual)

Study arms

  • Other
    Cephalometric radiographs and cast impressions were collected before and after intervention.

    Cephalometric radiographs, and extraoral and intraoral photographs, and cast impressions were collected before and after intervention. The weighted PAR Index (Peer Assessment Rating) employed to determine outcome of orthodontic treatment.

    Other: Non-extraction Orthodontic Treatment of Angle Class I Malocclusion

Interventions

  • OtherNon-extraction Orthodontic Treatment of Angle Class I Malocclusion

    Cephalometric radiographs, and extraoral and intraoral photographs, and cast impressions were collected before and after intervention. The weighted PAR Index (Peer Assessment Rating) employed to determine outcome of orthodontic treatment. Also the following soft tissue and bone indexes were assessed before and after intervention

06

What researchers measure

Primary outcomes

  1. We aimed to evaluate the effectiveness of non-extraction orthodontic treatment for Angle class I malocclusion.

    Cephalometric radiographs, and extraoral and intraoral photographs, and cast impressions were collected before and after intervention. The weighted PAR Index (Peer Assessment Rating) employed to determine outcome of orthodontic treatment

    Time frame: Cephalometric radiographs, and extraoral and intraoral photographs, cast impressions and PAR Index (Peer Assessment Rating) were collected before and after intervention through study completion, an average of 2 years

07

Study locations

1 site
  • Can Tho University of Medicine and Pharmacy
    Cần Thơ, 900000, Vietnam
08

References and documents

Publications

  • Baik KM, Anbar G, Alshaikh A, Banjar A. Effect of Social Media on Patient's Perception of Dental Aesthetics in Saudi Arabia. Int J Dent. 2022 Feb 27;2022:4794497. doi: 10.1155/2022/4794497. eCollection 2022. PubMed 35265132 ↗
09

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Oct 15, 2024, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT06638983
Lead sponsor
Can Tho University of Medicine and Pharmacy
Responsible party
Sponsor
First posted
Oct 15, 2024
Start date
May 20, 2020
Primary completion
May 20, 2022
Completion
Jun 15, 2022
Last update
Oct 15, 2024

Study contacts

Diem Chau Hong, DDS
principal investigator · Can Tho University of Medicine and Pharmacy

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 completed, as verified in May 2020. You cannot join it, but the record below documents what was studied.

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