Fastuca Rosamaria, Turiaco Helga, Assandri Fausto, Zecca Piero A, Levrini Luca, Caprioglio Alberto
Department of Biomedical, Surgical and Dental Sciences, University of Milan, 20122 Milan, Italy.
Department of Orthodontics, University of Insubria, 21100 Varese, Italy.
Children (Basel). 2021 Jan 11;8(1):38. doi: 10.3390/children8010038.
(1) Background: To investigate condylar position in subjects with functional posterior crossbite comparing findings before and after rapid maxillary expansion (RME) treatment through 3D analysis; (2) Methods: Thirty-two Caucasian patients (14 males, mean age 8 y 8 m ± 1 y 2 m; 18 females mean age 8 y 2 m ± 1 y 4 m) with functional posterior crossbite (FPXB) diagnosis underwent rapid palatal expansion with a Haas appliance banded on second deciduous upper molars. Patients' underwent CBCT scans before rapid palatal expansion (T0) and after 12 months (T1). The images were processed through 3D slicer software; (3) Results: The condylar position changes between T1 and T0 among the crossbite and non-crossbite sides were not statistically significant, except for the transversal axis. At T1, the condyles moved forward (y axis) and laterally (x axis), they also moved downward (z axis) but not significantly; (4) Conclusions: Condilar position in growing patients with functional posterior crossbite did not change significantly after rapid maxillary expansion.
(1) 背景：通过三维分析研究功能性后牙反合患者在快速上颌扩弓（RME）治疗前后髁突的位置；(2) 方法：32例诊断为功能性后牙反合（FPXB）的白种人患者（14例男性，平均年龄8岁8个月±1岁2个月；18例女性，平均年龄8岁2个月±1岁4个月），使用哈斯矫治器粘接于上颌第二乳磨牙进行快速腭中缝扩展。患者在快速腭中缝扩展前（T0）和12个月后（T1）接受CBCT扫描。图像通过三维切片软件进行处理；(3) 结果：除横轴外，反合侧与非反合侧在T1和T0之间的髁突位置变化无统计学意义。在T1时，髁突向前（y轴）和向外侧（x轴）移动，也向下（z轴）移动但不明显；(4) 结论：生长发育期功能性后牙反合患者在快速上颌扩弓后髁突位置无明显变化。
