口外力平面导板矫治替牙期安氏Ⅱ类1分类错（牙合）的临床研究  

Clinical research on efficacy of headgear and biteplane appliances in treatment for mixed dentition patients with Class Ⅱ Division 1 malocclusion

作　　者：赖晓宇[1] 翁春辉[1] 陆笑[1] 

机构地区：[1]暨南大学第四附属医院广州市红十字会医院口腔科,510220

出　　处：《国际医药卫生导报》2014年第1期6-9,共4页International Medicine and Health Guidance News

基　　金：广州市医药卫生科技项目（201102A213213）

摘　　要：目的 探讨口外弓颈牵引联合平面导板矫治替牙期安氏Ⅱ类1分类错（牙合）的疗效.方法 选取替牙期安氏Ⅱ类1分类错（牙合）患者30例,随机分为两组,每组15例.干预组患者应用口外弓颈牵引和上颌改良可摘平面导板矫治器,对照组暂观察不作干预.干预周期为15个月,干预周期前后两组均拍摄头颅侧位片.通过头影测量分析所需测定的软硬组织指标,获取两组干预周期前后上下颌骨位置变化、牙齿位置变化以及面部软组织变化的数据,行统计学分析.结果 干预组干预周期后SNA角、ANB角、U1/SN角、U1/PP角、Wits值和U1-AP值均减小,这六项指标的两组差值比较差异均有统计学意义（P＜0.05）,而SNB角、MP/SN角、MP/PP角、L1/MP角、Pg-NFH值和LI-AP值这六项指标的两组差值比较差异无统计学意义（P＞0.05）.干预组患者干预周期后Naso-labial angle和Z angle均增加,两项指标的两组差值比较差异有统计学意义（P＜0.05）,Lower lip to E plane值的两组差值比较差异无统计学意义（P＞0.05）.结论 口外弓颈牵引联合上颌改良可摘平面导板对替牙期安氏Ⅱ类1分类错（牙合）患者的骨骼、牙齿和软组织方面都产生了有利的影响,没有加重下前牙唇倾,利于后期固定正畸治疗.Objective To explore efficacy of headgear and biteplane appliances in treatment for mixed dentition patients with Class Ⅱ Division 1 malocclusion.Methods 30 mixed dentition patients with Class Ⅱ Division 1 malocclusion were randomly divided into two groups,15 patients for each group.The treatment group was treated by headgear and biteplane appliances,the control group was observed.The treatment period lasted for 15 months.Lateral cephalometric radiographs of all patients were taken before and after treatment period.Some parameters of sagittal anatomical landmarks were studied by the cephalometric analysis.All of the statistic analysis were performed by SPSS13.0 software.Results Except the factor of growth,treatment with headgear and biteplane appliances resulted in reduction of SNA angle,ANB angle,U 1/SN angle,U1/PP angle,Wits and U1-AP.There were no statistical significant differences found between two groups in SNB angle,MP/SN angle,MP/PP angle,L1/MP angle,Pg-NFH and L1-AP （P 〉 0.05）.After treatment period,Naso-labial angle and Z angle increased,the variation about two parameters among two groups was of statistical significance （P 〈 0.05）.There was no significant difference among two groups in lower lip to E plane distances （P 〉 0.05）.Conclusion Headgear and biteplane appliances have a beneficial effect on the mixed dentition patients with Class Ⅱ Division 1 malocclusion about bones,teeth and soft tissue.It is helpful for the fixed orthodontic treatment.

关 键 词：安氏Ⅱ类错(牙合) 口外牵引器 平面导板 

分 类 号：R783.5[医药卫生—口腔医学]