成人骨性Ⅱ类错[牙合]畸形患者上颌磨牙后间隙的测量研究  

The measurement study of the retromolar space in adult patients with skeletal class Ⅱ malocclusion

作　　者：马静[1] 张俊 陈琦 赵恬 雍敏[1] MA jing;ZHANG Jun;CHEN Qi;ZHAO Tian;YONG Min(Department of Orthodontics,Stomatological Hospital,General Hospital of Ningxia Medical University,Yinchuan 750004,China;Department of Stomatology,People′s Hospital of Wuzhong,Wuzhong 751100,China)

机构地区：[1]宁夏医科大学总医院口腔医院口腔正畸科,宁夏银川750004 [2]宁夏吴忠市人民医院口腔科,宁夏吴忠751100

出　　处：《宁夏医学杂志》2022年第12期1103-1105,共3页Ningxia Medical Journal

基　　金：陕西省牙颌疾病临床医学研究中心开放课题基金项目(201909)。

摘　　要：目的 通过对骨性Ⅱ错[牙合]畸形患者不同垂直骨面型上颌磨牙后间隙的测量及对比,从而评估不同垂直骨面型上颌磨牙后间隙的差异。方法 选取就诊于正畸科并拍摄锥形束CT(CBCT)影像的患者,随机筛选符合实验组纳入标准的骨性Ⅱ类错[牙合]畸形患者60例。根据垂直骨型分类标准将实验组分为高角组、均角组及低角组各20例,三维重建后对各组上颌磨牙后间隙的长度(RL)、宽度(RW)、高度(RH)进行测量。结果 骨性Ⅱ类低角组上颌磨牙后间隙RW为(12.81±1.96)mm,高角组上颌磨牙后间隙RW为(12.18±1.87)mm,差异具有统计学意义(P<0.05)。结论 高角组与低角组上颌磨牙后间隙宽度存在显著差异,低角患者的磨牙后间隙更有利于推上颌磨牙向远中,可为骨性Ⅱ类不同垂直骨面型患者的正畸治疗方案的设计提供参考。Objective To evaluate the difference of the retromolar space in maxilla between different vertical facial types in patients with skeletal class Ⅱ malocclusion by measuring and comparing the space between different vertical facial types.Methods 60 patients with skeletal class Ⅱ malocclusion who met the inclusion criteria of the experimental group were randomly selected. The length(RL),width(RW),and height(RH) of the posterior maxillary molar gap were measured in each group after 3D reconstruction, and the experimental group was divided into high angle group, even angle group, and low angle group(20 cases each),according to the vertical bone type classification criteria.Results The width of the posterior maxillary molar gap(RW) in the skeletal Class Ⅱ low-angle group(12.81±1.96)mm was greater than that in the high-angle group(12.18±1.87)mm, and the difference was statistically significant(P<0.05).Conclusion There is a significant difference in the width of the posterior maxillary molar gap between the high-angle group and the low-angle group. The posterior molar gap of the low-angle patients is more favorable for pushing the maxillary molars toward the distal center, which can provide a reference for the design of orthodontic treatment schemes for patients with different vertical facial types of skeletal class Ⅱ.

关 键 词：骨性Ⅱ类错[牙合] 磨牙后间隙 CBCT 

分 类 号：R783.9[医药卫生—口腔医学]