RESUMO
Objective:This study aimed to investigate the change of the position of the tongue before and after combined treatment of maxillary expansion and orofacial myofunctional therapy in children with mouth-breathing and skeletal class â ¡malocclusion. Methods:A total of 30 children with skeletal class â ¡ malocclusion and unobstructed upper airway were selected. The 30 children were divided into mouth-breathing groupï¼n=15ï¼ and nasal-breathing groupï¼n=15ï¼ and CBCT was taken. The images were measured by Invivo5 software. The measurement results of the tongue position of the two groups were analyzed by independent samples t-test. 15 mouth-breathing children with skeletal class â ¡ malocclusion were selected for maxillary expansion and orofacial myofunctional therapy. CBCT was taken before and after treatment, the measurements were analyzed by paired sample t test with SPSS 27.0 software package. Results:The measurement of the tongue position of the mouth-breathing and nasal-breathing groups were compared, the differences were statistically significantï¼P<0.05ï¼. The measurement of the tongue position showed significant difference after the combined treatment of maxillary expansion and orofacial myofunctional therapy in children with mouth-breathing and skeletal class â ¡malocclusionï¼P<0.05ï¼. Conclusion:Skeletal class â ¡ malocclusion children with mouth-breathing have low tongue posture. The combined treatment of maxillary expansion and orofacial myofunctional therapy can change the position of the tongue.
