Effect of personalized ETA appliance on mixed dentition stage patients with Class Ⅱ malocclusion
10.12016/j.issn.2096-1456.202440493
- Author:
ZUO Xiang
1
;
LI Qin
1
;
ZHANG Youmeng
1
;
CHEN Weixu
1
;
MA Xiaokai
2
;
LI Dongmei
3
Author Information
1. Department of Stomatology, The Eye and ENT Hospital of Fudan University, Fudan University
2. Beijing Aipulisi Health Technology Co.Ltd
3. Shinan Mingshi Dental Clinic, Qingdao Mingshi Medical Management Co., Ltd
- Publication Type:Journal Article
- Keywords:
customization;
elastodontic appliance;
Angle ClassⅡ;
mixed dentition;
early treatment appliance;
early treatment;
irregular dentition;
malocclusion
- From:
Journal of Prevention and Treatment for Stomatological Diseases
2025;33(6):502-508
- CountryChina
- Language:Chinese
-
Abstract:
Objective:To explore the impact of personalized early treatment appliances (ETA) on the relationship between dental and maxillofacial structures in patients with ClassⅡ malocclusion during the replacement phase, and to provide a basis for clinical treatment.
Methods:This study was reviewed and approved by the Medical Ethics Committee, and informed consent was obtained from patients. From May 2023 to December 2023, 15 patients with Angle ClassⅡ malocclusion accompanied by mandibular retraction and anterior deep overjet during mixed dentition were enrolled in this study (8 males and 7 females; mean age 8.8 years). Each patient received a customized domestically manufactured ETA that was created based on dental arch dimensions, overjet severity, and occlusal relationships assessed from study models. Patients were instructed to wear the appliance for at least 2 hours during the day and throughout the night. The treatment duration was 6 months, at which time the changes in cephalometric data before treatment (T0) and after treatment (T1) were compared using Uceph software
Results:The angle between sella, nasion and supramentale point B (SNB) of the patients increased significantly by (1.03 ± 1.74°) compared to before treatment (P = 0.039). The angle between subspinale point A and supramentale point B (ANB), the distance between point A and point B on the FH plane (wits value), the overjet, and the overbite decreased by (0.47 ± 0.61°), (2.48 ± 2.11) mm, (2.48 ± 3.42) mm, and (0.79 ± 1.40) mm, respectively, compared to before treatment, and the differences were statistically significant (P<0.05). The angle between sella, nasion and subspinale point A (SNA), the angle between the FH and MP planes (FMA), the angle between the long axis of the L1 and MP plane (IMPA), the angle between the MP plane and SN plane (MP-SN), the distance from S to Go divided by the distance from N to Me (S-Go/N-Me), and the distance of the FH plane perpendicular from G point to the Pog point (G Vert Pog) increased compared to before treatment, while the angle between the SGn and FH planes (Y-axis) and the angle between the long axis of the L1 and FH plane (FMIA) decreased compared to before treatment, but there was no statistical difference (P>0.05).
Conclusion:Personalized, customized ETA orthodontic appliances can effectively improve the sagittal and vertical relationships between the maxilla and mandible in patients with ClassⅡ malocclusion.
