CAJ | 학술논문

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,利于后期同定正畸治疗.
목적 탐토구외궁경견인연합평면도판교치체아기안씨Ⅱ류1분류착(아합)적료효.방법 선취체아기안씨Ⅱ류1분류착(아합)환자30례,수궤분위량조,매조15례.간예조환자응용구외궁경견인화상합개량가적평면도판교치기,대조조잠관찰불작간예.간예주기위15개월,간예주기전후량조균박섭두로측위편.통과두영측량분석소수측정적연경조직지표,획취량조간예주기전후상하합골위치변화、아치위치변화이급면부연조직변화적수거,행통계학분석.결과 간예조간예주기후SNA각、ANB각、U1/SN각、U1/PP각、Wits치화U1-AP치균감소,저륙항지표적량조차치비교차이균유통계학의의(P＜0.05),이SNB각、MP/SN각、MP/PP각、L1/MP각、Pg-NFH치화LI-AP치저륙항지표적량조차치비교차이무통계학의의(P＞0.05).간예조환자간예주기후Naso-labial angle화Z angle균증가,량항지표적량조차치비교차이유통계학의의(P＜0.05),Lower lip to E plane치적량조차치비교차이무통계학의의(P＞0.05).결론 구외궁경견인연합상합개량가적평면도판대체아기안씨Ⅱ류1분류착(아합)환자적골격、아치화연조직방면도산생료유리적영향,몰유가중하전아진경,리우후기동정정기치료.
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.