掩饰性治疗成人轻中度骨性Ⅲ类软硬组织变化的研究

Study of soft and hard tissue changes in adults with skeletal class III malocclusion after compensatory therapy

目的分析成人骨性Ⅲ类错k非拔牙代偿性矫治前后的软硬组织变化。方法选取成人骨性Ⅲ类错k非拔牙患者11例,运用直丝弓矫治技术配合早期轻力Ⅲ类牵引进行矫治,通过头影测量分析得出治疗前后软硬组织的变化。结果治疗后软组织UL-EP、UL-Sn-Pogs增大,Z角、∠Cm-Sn-UL、LL-Sn-Pogs减小;硬组织∠ANB、Wits值、∠NA-PA、Ptm-U6距、∠U1-SN、∠U1-NA、U1-NA距增大,∠U1-L1、∠L6-MP、L6-Mc Namara距减小,以上指标治疗前后差异具有统计学意义(P<0.05)。结论直丝弓矫治技术配合早期短Ⅲ类轻力牵引可以有效治疗轻中度骨性Ⅲ类错k,治疗前后患者侧貌得到明显改善。

Objective To analyze changes of hard and soft tissues in adult patients who were skeletal class III malocclusion by camouflage treatment without extraction.Methods Using standard straight wire appliance to treat 11 adult patients with skeletal class III malo-cclusion,light force correction were put into use in aligning phase.Comparing pre-treatment and post-treatment,changes of hard and soft tissues were analyzed by lateral head films.Results About soft tissues UL-EP and UL-Sn-Pogs are higher,Cm-Sn-UL angle、LLSn-Pogs and Z angle are smaller;for hard tissues,ANB angle、Wits value、NA-PA angle、Ptm-U6、U1-SN angle、U1-NA angle、U1-NA increase,and U1-L1 angle、L6-MP angle、L6-McNamara decrease.By t-test,the results were statistically significant(P<0.01).Conclusion Using straight wire correction technique for adult patients with skeletal class III malocclusion without extraction and surgery,there is a efficient way that early light force with short elastic in aligning phase.The side face of patient was improved between pre-treatment and post-treatment.