青少年双颌前突患者拔牙矫治前后面部软组织的变化
双颌前突,,青少年;双颌前突;拔牙;软组织侧貌,0引言,1对象和方法,2结果,3讨论,【参考文献】
·研究原著·Changes in softtissue profile after orthodontic treatment with four premolars extraction in bimaxillary protrusion in adolescents
SONG WeiHua, LI Dong, DUAN YinZhong, TANG YingWei
Department of Orthodontics, Stomatology College, Fourth Military Medical University, Xi’an 710033, China
【Abstract】 AIM: To study the changes in softtissue profile after orthodontic treatment with four premolars extracted in bimaxillary protrusion in adolescents. METHODS: In 15 adolescents with bimaxillary protrusion, 10 soft tissue controls were compaired before and after orthodontic treatment to evaluate the changes in soft tissue profile with paired ttest. RESULTS: Five angular measurements changed statistically. FHN′Pg′, N′SnPg′ and LsSnSN respectively decreased by 2.6°, 3.1° and 3.4°, CmSnLs and LiSiSN respectively increased by 6.0° and 3.1°; in 5 linear measurements 3 changed statistically. SnA decreased by 1.4 mm, U1Ls increased by 1.6 mm, LiL1 increased by 1.5 mm; there were no changes in NN′ and SiB. CONCLUSION: There are different changes in the softtissues according to the various positions, softtissue profiles are improved significantly after orthodontic treatment with four premolars extraction . ......
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