An asymmetric magnetic reverse Twin-block applian ce for the treatment of a skeletal Class III malocclusion: a case report
Abstract
Background
The treatment of a skeletal Class III malocclusion with accompanying mandibular asymmetry is an orthodontic challenge. A skeletal Class III may be associated with a retrognathic maxilla, a prognathic mandible and a mandibular asymmetry can be of dental or skeletal origin or in various combinations. Timely treatment with appropriate biomechanics is crucial for an acceptable and stable result.
Aims
The aim of this article was to introduce a clinically effective asymmetric magnetic reverse Twin-block appliance (AMRTB) for growth modification treatment of an 11-year-old girl who presented with a skeletal Class III malocclusion and accompanying mandibular asymmetry.
Methods
The treatment was comprised of two phases, the first of which was growth modification using the AMRTB for the stimulation of maxillary growth, restraint of mandibular growth, and improvement of the mandibular asymmetry. This was followed by a second phase involving full fixed appliances to optimise the interdigitation and occlusion.
Results
The skeletal Class III relationship and mandibular asymmetry was successfully corrected after two years of treatment. A good facial appearance and pleasing smile aesthetics were achieved. The treatment result was stable after six years of follow-up.
Conclusion
This case demonstrated that the AMRTB was a clinically effective appliance for growth modification treatment in patients with a skeletal Class III malocclusion and mandibular asymmetry.
© 2021 Qiaoling Ma, Li Mei, Yuanyuan Jiang, Yun Xu, Tuojiang Wu, Huang Li, published by Australian Society of Orthodontists Inc.
This work is licensed under the Creative Commons Attribution 4.0 License.