BACKGROUND Palatal expansion treatment has been used to expand the constricted maxillary arch and has become a routine procedure in orthodontic practice over the past decades.However,the long-term stability of expansi...BACKGROUND Palatal expansion treatment has been used to expand the constricted maxillary arch and has become a routine procedure in orthodontic practice over the past decades.However,the long-term stability of expansion in the permanent dentition without a surgical approach is uncertain.CASE SUMMARY We present the case of a 15-year-old boy with Class II malocclusion and constricted arches.The patient was treated with rapid palatal expansion(RPE)followed by a fixed orthodontic appliance.A 7-year follow-up evaluation was performed by analyzing cephalometric radiographs,plaster models,and photographs.The patient’s constricted maxillary and mandibular arches were relived after the expansion treatment.A Class I occlusion and normal arch form were established and maintained in the long-term.CONCLUSION RPE treatment is successful in solving constricted dental arch in the permanent dentition without a surgical approach.Permanent retention and even occlusal contact help prevent long-term relapse.展开更多
目的:研究快速扩弓前后龈沟液天冬氨酸转氨酶(AST)与碱性磷酸酶(ALP)水平的变化,以及其与快速扩弓牙周组织改建的关系。方法:选择38例快速扩弓的患者(10．5-12．8岁),随机分为对照组(18例)和加力组(20例)。利用全自动化生化分析仪检测...目的:研究快速扩弓前后龈沟液天冬氨酸转氨酶(AST)与碱性磷酸酶(ALP)水平的变化,以及其与快速扩弓牙周组织改建的关系。方法:选择38例快速扩弓的患者(10．5-12．8岁),随机分为对照组(18例)和加力组(20例)。利用全自动化生化分析仪检测快速扩弓前,快速扩弓24h、7d,及保持7d、14d、28d的龈沟液AST、ALP水平的变化,结果以酶总量／牙表示。采用SAS(r)Proprietary Software Version 9．00对数据进行配对t和两样本t检验。结果:加力组AST水平在快速扩弓24h后开始升高(P<0．05),对照组在快速扩弓7d后开始升高(P<0．01),2组AST水平至保持28d时一直维持在较高水平(P<0．01);扩弓24h至保持28d,加力组与对照组AST水平存在显著差异(P<0．05)。加力组和对照组ALP水平在快速扩弓7d后开始升高,至保持28d时一直维持在较高水平(P<0．01);从扩弓7d至保持28d,加力组与对照组ALP水平存在显著差异(P<0．01)。结论:龈沟液AST、ALP水平可以在一定程度上反映快速扩弓后牙周组织的改建。展开更多
基金Supported by the National Natural Science Foundation of China No.81970909(to Liu DW),No.51903003(to Yu TT)the New Clinical Technology Fund of PKUSS,No.PKUSSNCT-11A07(to Liu DW)Peking University Medicine Seed Fund for Interdisciplinary Research,No.BMU2018MX007(to Liu DW).
文摘BACKGROUND Palatal expansion treatment has been used to expand the constricted maxillary arch and has become a routine procedure in orthodontic practice over the past decades.However,the long-term stability of expansion in the permanent dentition without a surgical approach is uncertain.CASE SUMMARY We present the case of a 15-year-old boy with Class II malocclusion and constricted arches.The patient was treated with rapid palatal expansion(RPE)followed by a fixed orthodontic appliance.A 7-year follow-up evaluation was performed by analyzing cephalometric radiographs,plaster models,and photographs.The patient’s constricted maxillary and mandibular arches were relived after the expansion treatment.A Class I occlusion and normal arch form were established and maintained in the long-term.CONCLUSION RPE treatment is successful in solving constricted dental arch in the permanent dentition without a surgical approach.Permanent retention and even occlusal contact help prevent long-term relapse.
文摘目的:研究快速扩弓前后龈沟液天冬氨酸转氨酶(AST)与碱性磷酸酶(ALP)水平的变化,以及其与快速扩弓牙周组织改建的关系。方法:选择38例快速扩弓的患者(10．5-12．8岁),随机分为对照组(18例)和加力组(20例)。利用全自动化生化分析仪检测快速扩弓前,快速扩弓24h、7d,及保持7d、14d、28d的龈沟液AST、ALP水平的变化,结果以酶总量／牙表示。采用SAS(r)Proprietary Software Version 9．00对数据进行配对t和两样本t检验。结果:加力组AST水平在快速扩弓24h后开始升高(P<0．05),对照组在快速扩弓7d后开始升高(P<0．01),2组AST水平至保持28d时一直维持在较高水平(P<0．01);扩弓24h至保持28d,加力组与对照组AST水平存在显著差异(P<0．05)。加力组和对照组ALP水平在快速扩弓7d后开始升高,至保持28d时一直维持在较高水平(P<0．01);从扩弓7d至保持28d,加力组与对照组ALP水平存在显著差异(P<0．01)。结论:龈沟液AST、ALP水平可以在一定程度上反映快速扩弓后牙周组织的改建。
