目的：本研究比较了两脚和四脚腭快速扩张器在打开腭中缝和牙齿扩张的效果。

Objective:The purpose of this study was to determine the difference, if any, between midpalatal suture separation and dental expansion produced between 2-points or the 4-points group.

youdao

目的：本研究比较了两脚和四脚腭快速扩张器在打开腭中缝和牙齿扩张的效果。

Objective:The purpose of this study was to determine the difference, if any, between midpalatal suture separation and dental expansion produced between 2-points or the 4-points group.

youdao