新型交叉颊面管对第二前磨牙拔除后的支抗效果评估
Evaluation of the anchorage effect of a new cross buccal tube in the treatment of second premolar extraction
张馨匀 1韩易辰 1江浩 2张明灿1
作者信息
- 1. 天津市滨海新区塘沽口腔医院正畸科(邮编 300450)
- 2. 天津市第五中心医院口腔科
- 折叠
摘要
目的 评价新型交叉颊面管(XBT)关闭上颌第二前磨牙拔牙间隙支抗控制的临床效果.方法 选取15例牙列中重度拥挤、骨性Ⅰ类、上颌第二前磨牙缺失或临床检查难以保留的青少年患者,应用生理性支抗技术,减数上颌第二前磨牙,解除拥挤、内收前牙.治疗前后拍摄头颅侧位片并进行头影测量,观察与磨牙支抗和前牙内收相关的骨性、牙性指标变化.结果 所有患者治疗结束后牙齿排列整齐,咬合关系良好,侧貌改善.治疗前后,骨性指标∠SNA、∠SNB、∠ANB和垂直向高度∠MP-SN变化差异无统计学意义(P＞0.05).牙性指标上下颌中切牙角度∠U1-SN、∠U1-NA、∠L1-MP、∠L1-NB减小,∠U1-L1增大(P＜0.05);上切牙切缘点远中移动(P＜0.05),上切牙根尖点和上颌磨牙位置无明显改变.结论 应用新型交叉颊面管有利于青少年患者关闭上颌第二前磨牙拔牙间隙的支抗控制.
Abstract
Objective To evaluate the clinical effect of using a new cross buccal tube(XBT)to close the extraction gap of the maxillary second premolar and control the anchorage.Methods Fifteen adolescent patients with moderate to severe crowding,skeletal Class Ⅰ,missing maxillary second premolars or difficult to retain during clinical examination were selected.PASS orthodontic technique was used to reduce the number of maxillary second premolars to relieve crowding and retract the anterior teeth.Before and after treatment,head lateral images were taken and cephalometric measurements were taken.Changes of bone and dental indexes related to molar anchorage and anterior adduction were observed.Results After treatment,teeth of all patients were arranged neatly,the occlusion relationship was good and the profile was improved.Before and after treatment,there were no significant changes in bone indicators such as ∠SNA,∠SNB and ∠ANB(P＞0.05).There was no significant change in vertical height ∠MP-SN(P＞0.05).The angle of the upper and lower central incisors,∠U1-SN,∠U1-NA,∠ L1-MP and ∠L1-NB decreased significantly,while ∠U1-L1 increased significantly(P＜0.05).The upper incisor margin point moving towards the distal(P＜0.05),and there was no significant change in the position of the upper incisor root apex and first molar(P＞0.05).Conclusion The application of the new cross buccal tube is beneficial for adolescent patients to control the occlusion of the extraction gap of the maxillary second premolar.
关键词
正畸支抗/青少年/新型交叉颊面管/第二前磨牙拔除Key words
orthodontic anchorage procedures/adolescent/new cross buccal tube/second premolar extraction引用本文复制引用
基金项目
天津市滨海新区卫生健康委科技项目(2022BWKQ031)
出版年
2024
NETL
NSTL
万方数据