个性化方案矫治先天性下颌恒切牙缺失临床分析

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[摘要]本文患者为年轻女性，骨性Ⅱ类，下颌先天性缺失一颗恒切牙，因面突、牙齿前突、不齐求治。根据患者的具体情况，采取个性化治疗方案。拔除14、24、26，35、45、47，矫正28、48，关闭所有拔牙间隙。患者治疗后前牙覆牙合覆盖正常，右侧尖牙及磨牙Ⅰ类关系，左侧尖牙及磨牙为Ⅲ类关系。

[关键词]下颌恒切牙；先天性牙齿缺失；骨性Ⅱ类；牙齿前突；拔牙矫治

[中图分类号]R783.5    [文献标志码]B    [文章编号]1008-6455（2024）01-0129-04

Clinical Analysis of Correction of Congenital Mandibular Permanent Incisor Tooth Loss with Personalized Treatment

ZENG Siting1，2，DENG Jiajun1，SHAO Qunle1，CHEN Jianming3，ZHOU Shaoyun1

（1.Department of Stomotology， Guangzhou Medical University Second Affiliated Hospital， Guangzhou 510260，Guangdong，China; 2.Department of Stomotology，Shenzhen Luohu Hospital of Traditional Chinese Medicine，Shenzhen 518009，Guangdong，China; 3.Department of Orthodontics，Affiliated Stomatological Hospital of Guangzhou Medical University，Guangzhou 510180，Guangdong，China）

Abstracts： This article reported a young female with Skeletal Ⅱ Malocclusion and congenitally missing mandibular incisor， whose chief complaints were facial protrusion， teeth protrusion and misaligned teeth. According to the specific situation of the patient， an individualized treatment plan is adopted. Not only the maxillary first premolars and the mandible second premolars， but also the maxillary left first molar and the mandible second molar were extracted to level and align arch， while  retaining two third molars in the orthodontic treatment. Fianlly， all the extraction spaces were closed. After treatment， overbite and overjet were normal. The treatment successfully achieved Class Ⅰ relationship of the right canine and molar and a mild Class Ⅲ relationship for the left canine and molar.

Key words： mandibular permanent incisor teeth; congenital tooth loss; Skeletal Ⅱ; teeth protrusion; extraction treatment

先天缺失牙最常见于女性前牙区，下颌切牙先天缺失发生率为2.71%，下颌切牙缺失的部位多数为中切牙[1-2]。（剩余4164字）