安氏Ⅰ类拔牙正畸治疗牙槽嵴高度变化的CBCT研究  

CBCT-assisted evaluation of distance from cementoenamel junction to alveolar crest in ClassⅠextraction cases

作　　者：刘玮玮 马俊青[1] LIU Weiwei;MA Junqing(Department of Orthodontics,The Affiliated Stomatological Hospital of Nanjing Medical University,Jiangsu Province Key Laboratory of Oral Diseases,Jiangsu Province Engineering Research Center of Stomatological Translational Medicine,Nanjing 210029,China)

机构地区：[1]南京医科大学附属口腔医院正畸科,江苏省口腔疾病研究重点实验室,江苏省口腔转化医学工程研究中心,江苏南京210029

出　　处：《口腔医学》2022年第11期1011-1014,共4页Stomatology

基　　金：国家自然科学基金(82170911);江苏省科技计划社会发展项目(BE2021724);江苏高校优势学科建设工程资助项目(2018-87)。

摘　　要：目的通过分析锥形束CT(cone beam CT,CBCT)比较成人和青少年安氏Ⅰ类正畸患者经减数正畸治疗前后的牙槽嵴高度,探究减数治疗对成人及青少年安氏Ⅰ类患者牙槽骨高度的影响及差异。方法研究纳入成人和青少年安氏Ⅰ类拔牙正畸患者共40例(成人20例,青少年20例),均减数4颗第一前磨牙进行矫治,通过术前及术后CBCT分别对青少年及成人患者的20颗牙颊、舌侧牙槽嵴高度进行测量及分析。结果在测量的3200个根面中,成人在正畸治疗后前牙区牙槽骨高度降低明显;成人矫治前有210个根面骨开裂,拔牙矫治术后为477个,青少年矫治前骨开裂有14个,拔牙矫治术后为40个。结论正畸拔牙矫治将导致成年患者牙弓前部牙槽骨高度降低,而青少年组拔牙矫治前后各区段牙槽骨高度未见明显变化。Objective To analyze the alveolar ridge height of adults and adolescents who accept extraction during orthodontic treatment by cone beam CT(CBCT)in order to explore the difference of extraction-related alveolar bone loss between adults and adolescents.Methods A total of 40 Angle's ClassⅠorthodontic patients were included in the study(20 adults and 20 teenagers),and 4 first premolars were extracted for each subject during orthodontic treatment.The buccal and lingual faces of the remaining 20 teeth of each patient were measured by CBCT before and after treatment respectively.Results Among 3200 root surfaces measured,the height of alveolar bone in the anterior area was significantly decreased in adults after orthodontic treatment;the quantity of dehiscence in adults before orthodontic treatment was 210,and the number was 477 after treatment.The number of adolescents with bone dehiscence before orthodontic treatment was 14,and after tooth extraction and orthodontic treatment the number was 40.Conclusion In adult patients,orthodontic extraction treatment reduces the height of alveolar bone in the anterior part of dental arch.However,in the adolescent group,no significant difference is detected in the dental arch before and after orthodontic treatment.

关 键 词：拔牙矫治 牙槽嵴高度 锥形束CT 

分 类 号：R783.5[医药卫生—口腔医学]