一种新型磁性正畸矫治器（MOA-III）对轻度至中度骨性III类错颌儿童牙颌面复合体的影响。
Effects of a novel magnetic orthopedic appliance (MOA-III) on the dentofacial complex in mild to moderate skeletal class III children.
作者信息
Zhao Ning, Feng Jing, Hu Zheng, Chen Rongjing, Shen Gang
机构信息
Department of Orthodontics, Shanghai Key Laboratory of Stomatology, Shanghai No. 9 Hospital, ShanghaiJiaotong University School of Medicine, Shanghai, China.
出版信息
Head Face Med. 2015 Oct 14;11:34. doi: 10.1186/s13005-015-0092-7.
INTRODUCTION
The objective of this study was to evaluate the changes of skeletal and dental structures in mild to moderate skeletal Class III children following the use of a new magnetic orthopedic appliance (MOA-III).
METHODS
A total of 36 patients (14 boys and 22 girls, mean age 9 years and 5 months) who presented with a mild to moderate skeletal Class III jaw discrepancy were treated with MOA-III. Another group of 20 untreated patients (9 boys and 11 girls, mean age 9 years and 2 months) with the same level of deformity served as the control group. The average treatment time was 6.6 months. Radiographs were taken at the same time intervals for both groups. A paired t test was used to determine the significant differences before and after treatment, and a two-sample t test was used to analyze the differences between the treatment and control groups.
RESULTS
The anterior crossbite in all subjects was corrected after MOA-III therapy. The maxillomandibular relationship showed favorable changes (ANB, Wits, overjet increased significantly, P < 0.001). The maxilla was anteriorly positioned (SNA, ptm-A, ptm-S increased significantly, P < 0.001) with clockwise rotation (PP-FH increased, P < 0.001). The mandible showed a slight downward and backward rotation (SNB decreased, P < 0.05, MP-SN, Y-axis increased, P < 0.05). The length of the mandibular body showed no significant changes (Go-Pg, P > 0.05). Significant upper incisor proclination and lower incisor retroclination were observed (UI-NA increased, P < 0.001, LI-NB, FMIA decreased, P < 0.001). The upper lip moved forward, and the lower lip moved backward (UL-EP increased, P < 0.001, LL-EP decreased, P < 0.05). In the control group, most of the parameters showed normal growth, except for some unfavorable mandibular skeletal and soft tissue changes (Go-Pg, Go-Co, MP-SN, N'-SN-Pg' increased, P < 0.001). Significant positive changes were induced with the MOA-III appliance compared to the untreated group.
CONCLUSIONS
The MOA-III was effective for the early treatment of a mild to moderate Class III malocclusion in children.
引言
本研究的目的是评估使用新型磁力矫治器（MOA-III）后，轻度至中度骨性III类错颌儿童骨骼和牙齿结构的变化。
方法
共有36例患者（14名男孩和22名女孩，平均年龄9岁5个月）表现为轻度至中度骨性III类颌骨畸形，接受了MOA-III治疗。另一组20例未经治疗的患者（9名男孩和11名女孩，平均年龄9岁2个月），具有相同程度的畸形，作为对照组。平均治疗时间为6.6个月。两组在相同时间间隔拍摄X线片。采用配对t检验确定治疗前后的显著差异，采用两样本t检验分析治疗组与对照组之间的差异。
结果
MOA-III治疗后，所有受试者的前牙反颌均得到矫正。上颌骨与下颌骨的关系显示出有利变化（ANB、Wits值、覆盖显著增加，P<0.001）。上颌骨向前移位（SNA、ptm-A、ptm-S显著增加，P<0.001）并顺时针旋转（PP-FH增加，P<0.001）。下颌骨显示出轻微的向下和向后旋转（SNB减小，P<0.05，MP-SN、Y轴增加，P<0.05）。下颌体长无显著变化（Go-Pg，P>0.05）。观察到明显的上切牙前倾和下切牙后倾（UI-NA增加，P<0.001，LI-NB、FMIA减小，P<0.001）。上唇向前移动，下唇向后移动（UL-EP增加，P<0.001，LL-EP减小，P<0.05）。在对照组中，除了一些不利的下颌骨骼和软组织变化（Go-Pg、Go-Co、MP-SN、N'-SN-Pg'增加，P<0.001）外，大多数参数显示正常生长。与未治疗组相比，MOA-III矫治器引起了显著的积极变化。
结论
MOA-III对儿童轻度至中度III类错颌的早期治疗有效。
Zotero 插件