Treatment Effects of Herbst Appliance in Skeletal Class II Cases During Prepubertal and Postpubertal Periods: A Cone Beam Computed Tomographic Study
Trial Snapshot
- Phase
- Not Applicable
- Status
- Completed
- Sponsor
- Al-Azhar University
- Enrollment
- 36
- Locations
- 1
- Primary Endpoint
- Skeletal and dental changes
Study 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.
Study Design
- Study Type
- Interventional
- Allocation
- Randomized
- Intervention Model
- Parallel
- Primary Purpose
- Treatment
- Masking
- Single (Outcomes Assessor)
Eligibility Criteria
- Ages
- 8 Years to 17 Years (Child)
- Sex
- All
- Accepts Healthy Volunteers
- Yes
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.
Secondary Outcomes
- Condylar head position(8 months)
Investigators
khaled farouk
lecturer
Al-Azhar University