Changes in Arch Parameters After Molar Distalization; Hybrid Hyrax Distalizer Versus Pendulum

Not Applicable

• Conditions: Angle Class 2 Malocclusion
• Interventions: Device: Hybrid hyrax distalizer; Device: Pendulum distalizer

• Registration Number: NCT05470179
• Lead Sponsor: Mohamed Abdelrhman Shendy Abdelrhman

Brief Summary

this study was to compare the changes in arch parameters after molar distalization; hybrid hyrax distalizer versus Pendulum distalizer using CBCT.

Detailed Description

Evaluation of maxillary molar amount of distal movement and the amount of anchorage loss Arch length, arch width, arch depth

Study Timeline

• Study Start: 2022-05-10
• Study First Submitted: 2022-07-04
• Study First Submitted QC: 2022-07-21
• Study First Posted: 2022-07-22
• Primary Completion: 2022-11-25
• Status Verified: 2024-05
• Last Update Submitted: 2024-05-21
• Last Update Posted: 2024-05-22
• Study Completion: 2024-07-30

Recruitment & Eligibility

• Status: ENROLLING_BY_INVITATION
• Sex: All
• Target Recruitment: 30

Inclusion Criteria

• For group 1(Hybrid hyrax distalizer) Patients suffering maxillary collapse with a skeletal background with unilateral or bilateral posterior crossbite.
• For group 2 (Pendulum distalizer) Patients with skeletal class I or class II malocclusion who needed upper first and second molar distalization for incisor retraction or relieving of the upper arch crowding and minimum or no crowding in lower jaw were selected.
• All Patients had no systemic diseases that may affect bone quality or interfere with orthodontic treatment, periodontal disease and no previous orthodontic treatment.
• Age range was 13 to 17 years.

Exclusion Criteria

• Missed upper first molar.
• un-cooperative patient

Study & Design

• Study Type: INTERVENTIONAL
• Study Design: PARALLEL

Arm && Interventions

Group	Intervention	Description
Pendulum distalizer device	Hybrid hyrax distalizer	Modified pendulum with miniscrews for 6 months for maxillary molar distal movement in class II angle malocclusion
Pendulum distalizer device	Pendulum distalizer	Modified pendulum with miniscrews for 6 months for maxillary molar distal movement in class II angle malocclusion
Hybrid hyrax distalizer	Pendulum distalizer	Inverted hyrax with 2 miniscrews for 6 months for maxillary molar distal movement in class II angle malocclusion
Hybrid hyrax distalizer	Hybrid hyrax distalizer	Inverted hyrax with 2 miniscrews for 6 months for maxillary molar distal movement in class II angle malocclusion

Primary Outcome Measures

Name	Time	Method
Angles in degree SNA,SNB,ANB, Molar Rotation	6 months	Using cbct and cast
Arch parameters in millimeter Arch length, width,depth and circumference	6 Months	Assessment of airway using cbct

Secondary Outcome Measures

Name	Time	Method
Nasopharyngeal airway dimensions in Cubic centimeters	6 months	CBCT

Trial Locations

Locations (2)

Mohamed Shendy; 🇪🇬 Cairo, Nasr City, Egypt

Cairo; 🇪🇬 Cairo, Egypt