Treatment Effects of Herbst Appliance in Skeletal Class II Cases During Prepubertal and Postpubertal Periods: A Cone Beam Computed Tomographic Study

Al-Azhar University1 site in 1 country36 target enrollmentOctober 1, 2017

ConditionsClass II Malocclusion, Division 1

Overview

Phase: Not Applicable
Intervention: Not specified
Conditions: Class II Malocclusion, Division 1
Sponsor: Al-Azhar University
Enrollment: 36
Locations: 1
Primary Endpoint: Skeletal and dental changes
Status: Completed
Last Updated: 5 years ago

Overview Investigators Eligibility Criteria Outcomes Sites Similar Trials

Overview

Brief Summary

The study was directed to compare the treatment outcomes of subjects with Class II malocclusion who were treated with Herbst appliance before and after puberty.

Detailed Description

Thirty-six Class II patients were randomly selected and divided into two groups based on their stage of skeletal maturation: pre-pubertal group (18 patients, mean age 9.15± 1.5 years) and post-pubertal group (18 patients, mean age 16.3 ± 1.0 years). All patients were treated with metallic splint supported Herbst IV appliance. Pretreatment and post-Herbst IV treatment cone beam CT(CBCT) scans were obtained for both groups. Dentoskeletal and TMJ measurements made on the CBCT scans were analysed.

Registry

clinicaltrials.gov

Start Date

October 1, 2017

End Date

April 1, 2019

Last Updated

5 years ago

Study Type

Interventional

Study Design

Parallel

Sex

All

Investigators

Sponsor

Al-Azhar University

Responsible Party

Principal Investigator

khaled farouk

lecturer

Al-Azhar University

Eligibility Criteria

Inclusion Criteria

•Skeletal Class II malocclusion with retrognathic mandible (ANB \>5°, SNB\<76°)
•Normal growth pattern (SN/MP angle was in 25°- 35° range)
•Unilateral or bilateral Class II molar relationship greater than or equal to one-half a cusp width.
•Minimal or no crowding in the mandibular arch (0-5mm).
•Average inclination or slight retroclination of the lower incisor.
•An overjet greater than 5 mm.

Exclusion Criteria

•Skletal Class I
•Craniofacial syndrome.

Outcomes

Primary Outcomes

Skeletal and dental changes

Time Frame: 8 months

The DICOM (Digital Imaging and Communications in Medicine) files from the pre and post CBCT scans were imported to Mimics software (Version 10.1, Materialise NV, Leuven, Belgium); and the cephalometric landmarks and planes were defined . Linear sagittal measurements of point A, point B, glenoid fossa, upper incisor, lower incisor, upper molars, and lower molars were recorded in relation to orbital perpendicular plane.