Long-term morphometric changes in the anterior alveolar bone in adolescents and adults after space closure: A retrospective study

作者全名："Li, Lingfeng; Chen, Yanxi; Wang, Jingxi; Luo, Nan; Wu, Yan; Dai, Hongwei; Zhou, Jingping"

作者地址："[Li, Lingfeng; Chen, Yanxi; Wang, Jingxi; Luo, Nan; Wu, Yan; Dai, Hongwei; Zhou, Jingping] Chongqing Med Univ, Stomatol Hosp, 426 Songshi North Rd, Chongqing, Peoples R China; [Li, Lingfeng; Chen, Yanxi; Wang, Jingxi; Luo, Nan; Wu, Yan; Dai, Hongwei; Zhou, Jingping] Chongqing Key Lab Oral Dis & Biomed Sci, Chongqing, Peoples R China; [Li, Lingfeng; Chen, Yanxi; Wang, Jingxi; Luo, Nan; Wu, Yan; Dai, Hongwei; Zhou, Jingping] Chongqing Municipal Key Lab Oral Biomed Engn Highe, Chongqing, Peoples R China"

通信作者："Zhou, JP (通讯作者)，Chongqing Med Univ, Stomatol Hosp, 426 Songshi North Rd, Chongqing, Peoples R China."

来源：ORTHODONTICS & CRANIOFACIAL RESEARCH

ESI学科分类：CLINICAL MEDICINE

WOS号：WOS:000962256700001

JCR分区：Q2

影响因子：2.4

年份：2023

卷号：　

期号：　

开始页：　

结束页：　

文献类型：Article; Early Access

关键词：alveolar bone remodelling; cone-beam computed tomography; space closure

摘要："Objectives: To analyse the morphometric changes in the anterior alveolar bone of both the maxilla and mandible after space closure and retention for 18-36 mo in adults and adolescents. Materials and Methods: Forty-two subjects with 4 first premolars extracted followed by retracting anterior teeth were included and divided into two age groups: adult group (4 males, 17 females, mean age: 23.67 +/- 5.29 y, treatment duration: 27.95 mo, retention duration: 26.96 mo, ANB: 4.8 +/- 2.1, U1-L1: 117.2 +/- 9.2, U1-PP: 120.2 +/- 7.2, L1-MP: 99.2 +/- 5.3) and adolescent group (6 males, 15 females, mean age: 11.52 +/- 1.21 y, treatment duration: 26.18 mo, retention duration: 25.79 mo, ANB: 5.2 +/- 2.1, U1-L1: 116.0 +/- 8.6, U1-PP: 119.8 +/- 4.9, L1-MP: 99.7 +/- 4.9). Alveolar bone height and thickness of anterior teeth in both groups were measured using cone beam computed tomography (CBCT) imaging performed at the pretreatment (T1), posttreatment ( T2) and retention phases (T3). One-way repeated-measure ANOVAs were performed to evaluate the alveolar bone changes. Voxel-based superimpositions were performed to measure the amount of tooth movement. Results: After orthodontic treatment, the lingual bone height and thickness of both arches and the labial bone height of the mandible decreased significantly in both age groups (P <.05). Most of the labial bone height and thickness of the maxilla in both groups remained unchanged (P >.05). After retention, the lingual bone height and thickness increased significantly in both age groups (P <.05). The amounts of increased height ranged from 1.08 to 1.64 mm in adults and from 0.78 to 1.21 mm in adolescents, and the amounts of increased thickness ranged from 0.23 mm to 0.62 mm in adults and from 0.16 mm to 0.36 mm in adolescents. Obvious movements of the anterior teeth during retention were not found (P >.05). Conclusions: Although lingual alveolar bone loss occurred in adolescents and adults during orthodontic treatment, continuous remodelling occurred in the later retention phase, which provides a reference for clinical treatment planning of bimaxillary dentoalveolar protrusion."

基金机构："Chongqing Science and Health Joint Medical Research Project [2021MSXM114]; CQMU Program for Youth Innovation in Future Medicine [W0135]; Program for the Science and Technology Plan of Yubei District, Chongqing [2022]"

基金资助正文："Chongqing Science and Health Joint Medical Research Project [No. 2021MSXM114]; CQMU Program for Youth Innovation in Future Medicine [No. W0135]; The Program for the Science and Technology Plan of Yubei District, Chongqing [No. 2022 (agriculture and social) 36]"