Alveolar bone thickness and root length changes in the treatment of skeletal Class Ⅲ patients facilitated by improved corticotomy: a cone-beam CT analysis
10.3760/cma.j.issn.1002-0098.2015.04.009
- VernacularTitle:术前正畸中改良骨皮质切开术对牙槽骨及牙根影响的锥形束CT观察
- Author:
Jiaqi WU
1
;
Jiuhui JIANG
;
Li XU
;
Cheng LIANG
;
Cuiying LI
;
Xiao XU
Author Information
1. 100081,北京大学口腔医学院·口腔医院第一门诊部
- Keywords:
Malocclusion,Angle Class Ⅲ;
Cone-beam computed tomography;
Root resorption;
Corticotomy
- From:
Chinese Journal of Stomatology
2015;50(4):223-227
- CountryChina
- Language:Chinese
-
Abstract:
Objective To evaluate the alveolar bone thickness and root length changes of anterior teeth with cone-beam computed tomography(CBCT).Methods CBCT scans were taken for 12 skeletal Class Ⅲ patients who accepted the improved corticotomy(IC) procedures during pre-surgical orthodontics.The CBCT data in T1(the maxillary dental arch was aligned and leveled) and T2(extraction space closure) were superimposed and the alveolar bone thickness at root apex level and root length measurements were done.Results From T1 to T2,the buccal alveolar bone thickness for the upper lateral incisors increased from (1.89±0.83) to (2.47± 1.02) mm (P＜0.05),and for central incisors and for canines from (2.32±0.71) to (2.68 ± 1.48) mm and from (2.28 ± 1.08) to (2.41 ± 1.40) mm,respectively.According to Sharpe Grading System,the root resorption grade for 69 teeth of 72 was located in Grade 1,two teeth in Grade 2,one tooth in Grade 3.Conclusions The improved corticotomy had the potential to increase the buccal alveolar bone thickness and the root resorption in most teeth was in Grade 1 according to Sharpe grading system.
