Related Experiment Video
Updated: May 8, 2026
Measuring Maxillary Posterior Tooth Movement: A Model Assessment using Palatal and Dental Superimposition
Published on: February 23, 2024
A prospective controlled evaluation of Class II division 1 malocclusions treated with fixed lingual mandibular growth
1a Assistant Professor, Department of Orthodontics, School of Dentistry, University of Aleppo, Al-Shahbaa, Aleppo, Syria.
Objective:
To assess the net dentofacial effects of the fixed lingual mandibular growth modificator (FLMGM).
Materials And Methods:
The study sample comprised 38 patients with Class II/1 malocclusion and retrognathic mandible. All were in the pubertal growth spurt. Whereas FLMGM was applied to the treatment group (n=21, mean age=13.2 years), no treatment was performed on the control group (n=17, mean age=12.5 years). Skeletal and dentoalveolar changes were assessed on digital lateral cephalograms obtained at the beginning and end of the treatment/observation period of 8 months. Paired and independent t-tests were used to assess the differences within and between groups.
Results:
Maxillary growth was not affected by FLMGM treatment, which resulted in a significant overjet reduction of 4.1 mm, an increase in total mandibular length (Co-Gn) of 2.3 mm, chin advancement of 1.6°, and upper incisor retroclination of 4.0°. A reduction of 2.4° in ANB was largely due to an increase of 1.8° in SNB. Favorably, the lower incisors were obviously retroclined by 4.5°. The changes in the vertical skeletal relationships were negligible.
Conclusion:
FLMGM was effective in treating growing Class II/1 patients and produced favorable dentofacial effects, with the matched untreated sample showing minimal changes. Lower incisor retroclination was a benefit of FLMGM treatment.
