Effectiveness of the Damon system in the treatment of nonextraction orthodontic cases

Objectives The purpose of this study was to evaluate the dental, skeletal, and soft-tissue change in crowding cases treated with nonextraction approach using the Damon system. Materials and methods The sample included 20 patients, with an average age of 17.8 ± 3.7 years, selected on the basis of pretreatment class I skeletal and molar relationships with an acceptable soft tissue facial profile, and a moderate crowding range between 4.0 and 9.0 mm for the maxilla and 2.0 and 6.0 mm for the mandible. None of them had received any orthodontic treatment before, or had extraction or any congenital anomalies such as supernumerary teeth. Results The evaluation of the study was performed by detecting the dental, skeletal, and soft tissue changes between pretreatment and post-treatment study models and lateral cephalometric radiographs. The paired t-test was used for statistical analysis. The treatment required 20.7 ± 2.2 months to be finished, with an average of 13.8 ± 1.5 appointments. Conclusion The results of this study revealed that the correction of crowding was achieved through expansion of the dental arches and mandibular incisors proclination.