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Abstract
In the present study, Thirty-six Class patients II (A condition in which the upper jaw is larger than the lower jaw) were randomly selected and assigned to one of two groups based on their maturation stage: the 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 a metallic splint-supported Herbst IV appliance (An appliance that acts like artificial joint working between the upper and power jaws that keeps the lower jaw in a forward position, thus improving the Class II condition). Pretreatment (T1) and post-Herbst IV treatment (T2) scans were obtained for both groups. Dental and skeletal measurements were made on the scans and statistically analyzed using paired and independent t-tests. The study hypothesis was that; the dentoskeletal changes in Class II malocclusion treatment using Herbst appliance in the Pre-pubertal is more than the Post-pubertal growth stage due to the remaining growth potential for the pre-pubertal patients. The comparison between the two groups revealed statistically significant differences in horizontal skeletal parameters in the lower jaw only, while other readings were similar.
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Details
1 Al-Azhar University, Department of Orthodontics, Faculty of Dental Medicine, Cairo, Egypt (GRID:grid.411303.4) (ISNI:0000 0001 2155 6022); 7-020D Katz Group Centre for Pharmacy and Health Research University of Alberta, Faculty of Medicine and Dentistry, Edmonton, Canada (GRID:grid.17089.37) (ISNI:0000 0001 2190 316X)
2 Tanta University, Department of Orthodontics, Faculty of Dentistry, Tanta, Egypt (GRID:grid.412258.8) (ISNI:0000 0000 9477 7793)
3 Indiana University, Department of Orthodontics and Oral Facial Genetics, School of Dentistry, Indianapolis, USA (GRID:grid.257413.6) (ISNI:0000 0001 2287 3919); Mohammed Bin Rashid University of Medicine and Health Sciences (MBRU), Department of Orthodontics and Pediatric Dentistry, Hamdan Bin Mohammed College of Dental Medicine (HBMCDM), Dubai, UAE (GRID:grid.510259.a) (ISNI:0000 0004 5950 6858)
4 Al-Azhar University, Department of Orthodontics, Faculty of Dental Medicine, Cairo, Egypt (GRID:grid.411303.4) (ISNI:0000 0001 2155 6022)
5 7-020D Katz Group Centre for Pharmacy and Health Research University of Alberta, Faculty of Medicine and Dentistry, Edmonton, Canada (GRID:grid.17089.37) (ISNI:0000 0001 2190 316X)