Treatment Effects of Herbst Appliance in Skeletal Class II Cases During Prepubertal and Postpubertal Periods

Al-Azhar University

Status: Completed

Conditions: Class II Malocclusion, Division 1

Treatments: Device: Herbst appliance

Study type: Interventional

Funder types: Other

Identifiers

NCT04518865

Herbst azhar

Details and patient eligibility

About

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.

Full 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.

Enrollment: 36 patients

Sex: All

Ages: 8 to 17 years old

Volunteers: Accepts Healthy Volunteers

Inclusion criteria

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

Exclusion criteria

1. Skletal Class I
2. Craniofacial syndrome.

Trial design

Primary purpose: Treatment

Allocation: Randomized

Interventional model: Parallel Assignment

Masking: Single Blind

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36 participants in 2 patient groups

pre-pubertal group.

Experimental group

Description:

The patients were allocated into the pre-pubertal group based on their skeletal stage of maturation using the modified cervical vertebrae maturation Staging (CVMS) with skeletal maturity stages of CVMS II and CVMS III

Treatment:

Device: Herbst appliance

post-pubertal group

Experimental group

Description:

The patients were allocated into the post-pubertal group based on their skeletal stage of maturation using the modified cervical vertebrae maturation Staging (CVMS) with skeletal maturity stages of CVMS V and CVMS IV

Treatment:

Device: Herbst appliance