The Effect of Different Treatment Modalities of Class II Malocclusion on Upper Third Molars.

The Effect of Different Treatment Modalities of Class II Malocclusion on Upper Third Molars: A Retrospective Longitudinal Study

What is the effect of the different treatment modalities (distalization versus upper premolar extraction) of class II malocclusion on the position, inclination and incidence of impaction of the upper third molars?

Study Overview

• Status: Completed
• Conditions: Third Molar Impaction
• Intervention / Treatment: Other: extraction orthodontic treatment

Detailed Description

What is the effect of the different treatment modalities (distalization versus upper premolar extraction) of class II malocclusion on the position, inclination and incidence of impaction of the upper third molars? Pico P: Adolescent patients with class II malocclusion having bilateral developing upper third molars.

I: bilateral upper first premolar extraction orthodontic treatment with moderate anchorage.

C: distalization orthodontic treatment. O: Primary: angulation of the maxillary third molars.

• Study Type: Observational
• Enrollment (Actual): 46

Contacts and Locations

Study Locations

• Egypt
  • Cairo, Egypt, 12588
    • Amira Aboalnaga

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: Child; Adult
• Accepts Healthy Volunteers: Yes

• Sampling Method: Probability Sample

Study Population

• Egyptian Adolescent males and females (16 -18 years)

Description

Inclusion Criteria:

• Adolescent males and females (16 -18 years) with Bilaterally developing maxillary third molars. Not more than two thirds of the root development of the third molars had taken place.
• Class II malocclusion cases that were treated by 1) maxillary premolar extraction with a moderate anchorage requirement and achieved full unit class II molar relationship or 2) Distalization treatment plan and class I molar relationship was achieved.
• Patients with high-quality pre- and post-treatment radiographs.
• Normal or increased vertical dimension.

Exclusion Criteria:

• Maxillary Premolar extraction cases requiring maximum anchorage preparation.
• Low vertical dimension.
• Patients without dentofacial deformities, severe facial asymmetries, microdontia or hypodontia.

Study Plan

How is the study designed?

Number of groups / cohorts

2

Cohorts and Interventions

Group / Cohort	Intervention / Treatment
extraction treatment; patients treated with bilateral upper first premolar extraction orthodontic treatment with moderate anchorage.	Other: extraction orthodontic treatment; bilateral upper first premolar extraction orthodontic treatment with moderate anchorage.
distalization treatment; patients treated by distalization orthodontic treatment.

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
The angulation of the maxillary third molars.	the angle between the long axis of the third molar and the palatal plane	up to 24 weeks.

Secondary Outcome Measures

Outcome Measure	Measure Description	Time Frame
The vertical position of the third molars	the vertical position of the third molar relative to the second molar measured using Archer classification tool. (qualitative measure)	up to 24 weeks
The mineralization status of the third molars	the amount of calcified tissues of the third molar measured using Demirjian classification method	up to 24 weeks

Collaborators and Investigators

• Sponsor: Cairo University

Study record dates

Study Major Dates

• Study Start (Actual): September 4, 2021
• Primary Completion (Actual): June 4, 2023
• Study Completion (Actual): June 4, 2023

Study Registration Dates

• First Submitted: September 8, 2021
• First Submitted That Met QC Criteria: October 22, 2023
• First Posted (Actual): October 25, 2023

Study Record Updates

• Last Update Posted (Actual): October 25, 2023
• Last Update Submitted That Met QC Criteria: October 22, 2023
• Last Verified: October 1, 2023

More Information

Terms related to this study

• Keywords: distalization; premolar extraction; upper third molar; impaction of third molar
• Additional Relevant MeSH Terms: Stomatognathic Diseases; Tooth Diseases; Malocclusion; Malocclusion, Angle Class II; Overbite
• Other Study ID Numbers: CEBD-CU-2021-9-7

Plan for Individual participant data (IPD)

• Plan to Share Individual Participant Data (IPD)?: UNDECIDED

Drug and device information, study documents

• Studies a U.S. FDA-regulated drug product: No
• Studies a U.S. FDA-regulated device product: No