Department of Orthodontics, Second University of Naples, Italy.
Department of Orthodontics, University of Messina, Messina, Italy.
Eur J Paediatr Dent. 2014 Mar;15(1):59-62.
The aim of this study was to evaluate the dento-skeletal effects of mixed palatal expansion (MPE) on growing patients with a uni- or bilateral posterior crossbite and mild-to-moderate crowding as compared to untreated growing individuals using postero- anterior (PA) cephalometric analysis.
A group of 24 patients (18 girls and 6 boys) treated with a Hyrax- type device was compared to an untreated matched control group at T0 (8.6 yrs ± 2.01) and T1 (10 yrs ± 2.00) using PA cephalograms. The cephalometric analysis included eight bilateral skeletal and dental landmarks. The groups were compared using independent sample t-test to estimate dento-skeletal effects on PA cephalograms.
The treated group showed significant changes for the maxillary width (P<0.001) and upper molar width (P<0.001) when compared to those of the control group.
MPE may effectively increase transverse dimensions and correct posterior crossbites.
本研究旨在通过后前位（PA）头影测量分析，比较混合腭扩展（MPE）治疗的单侧或双侧后牙反颌伴轻度至中度拥挤的生长患者与未经治疗的生长个体的牙颌骨骼效应。
将 24 名患者（18 名女孩和 6 名男孩）组成的治疗组与 T0（8.6 岁±2.01）和 T1（10 岁±2.00）时未接受治疗的匹配对照组进行比较，使用 PA 头颅侧位片。头影测量分析包括 8 个双侧骨骼和牙齿标志点。使用独立样本 t 检验比较两组 PA 头颅侧位片的牙颌骨骼效应。
与对照组相比，治疗组上颌宽度（P<0.001）和上颌磨牙宽度（P<0.001）有显著变化。
MPE 可有效增加横向尺寸并纠正后牙反颌。
