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Estudio dual de control sobre el tratamiento de la maloclusión esquelética de clase III en adolescentes con tracción
Yang Liu1, Shukui Xu1, Linna Wang1
1Department of Orthodontics, Hebei Key Laboratory of Stomatology, Hebei Clinical Research Center for Oral Diseases, School and Hospital of Stomatology, Hebei Medical University, Shijiazhuang, China.
Objective:
To explore the effect of personalised titanium plate Bone-anchored maxillary protraction (BAMP) on the maxillofacial structure of adolescents with skeletal Class III malocclusion.
Methods:
A total of 20 patients with skeletal Class III malocclusion were selected as the treatment group 1 (TG1) with treatment using individualised BAMP. Twenty patients were selected as treatment group 2 (TG2) with treatment using facemask traction. Twenty-six patients were selected as the control group (CG) for non-interventional observation. The baseline and interval length of the three groups were matched, and a one-way ANOVA was used to compare the differences in results between the treatment group 1 and the other two groups.
Results:
Compared with TG2, there was a statistically significant difference in the change of the MP-FH (-1.07° ± 0.87° vs. 1.43° ± 1.95°), S-Ar-Go' (-0.64° ± 1.79° vs. 1.88° ± 4.07°), Ar-Go'-Me (-2.84° ± 1.57° vs. -1.22° ± 1.45°, p < 0.05). Compared with CG, there was a statistically significant difference in the Ptm-A (1.95 ± 1.58 mm vs. -0.39 ± 1.45 mm), Na-S-Ar (2.06° ± 1.77° vs. -0.35° ± 3.81°), Ar-Go'-Me (-2.84° ± 1.57° vs. 1.80° ± 4.76°, p < 0.05).
Conclusion:
Customised titanium plates combined with BAMP can be used to treat patients with skeletal Class III malocclusion during or after the peak phase of growth and development. By changing the morphology of the mandible and its positional relationship relative to the maxilla, the sagittal relationship and lateral appearance of patients with skeletal Class III malocclusion can be effectively improved, as well as the lip inclination of the upper and lower incisors. Compared with facemask protraction, this approach yields distinct vertical changes and mandibular orthopaedic effects, necessitating the selection of appropriate treatment protocols based on the patient's vertical growth pattern in clinical practice.
