Orthodontics Combined with Orthognathic Treatment and Its Effects on Occlusal Function and Soft Tissue Asymmetry in Patients with Skeletal Class Ⅲ Malocclusion and Mandibular Deviation

Abstract

This work aimed to explore the clinical efficacy of orthodontic combined with orthognathic treatment in patients with skeletal class III malocclusion and mandibular deviation. This work compared the occlusal function, soft tissue symmetry, treatment satisfaction, numerical rating scale (NRS), and Holdaway measures of 60 patients before and after treatment. The results showed that after treatment, the surface recruitment potential of different muscle bundles in the patient's face increased, which was more obvious at 6 months (P < 0.05). The facial muscle asymmetry of the patients all increased and decreased greatly after 3 and 6 months of treatment, respectively. After 3 months and 6 months of treatment, the deviation of the upper lip and the lower lip on both sides of the patient decreased, and the deviation of the mandible on both sides increased (P < 0.05). The patients' satisfaction with orthodontic combined with orthognathic treatment reached 96.67%, and the complication rate was 23.33%. After treatment, the NRS scores of anteroposterior radiographs in different parts were increased, the NRS scores of the lateral, inferior 1/3, and inferior 2/3 parts of the face were increased, while the NRS scores of the upper 1/3 and mid-face 1/3 parts were decreased. After treatment, the patient's A point convexity, Sn-H line, H angle, and mentiolabial groove depth were observably increased, while Li-H line, upper labial groove depth, upper lip thickness, chin thickness, and nasal convexity were sharply decreased (P < 0.05). In conclusion, orthodontic combined with orthognathic treatment can improve the occlusal function and soft tissue asymmetry of patients effectively, which was beneficial to the recovery of facial function and improved the facial aesthetics of patients.