skeletal growth only occurs at night,在這次的6 AIOC當中,DR. PROFITT提到,有關骨骼的發育,在夜間較明顯,因為這是人類處於休息整補狀態,細胞得到充份的代謝

TEETH only erupt at night(early evening),他提到在22:00~00:00這個時段為18.0 u/hr,若是在凌晨02:00~04:00~06:00則為-2.1u/hr

所以為何戴用headgear頭帽或是functional appliance(功能性矯正裝置)在夜間,其道理就在此,反而白天戴用的效果較不具差別性

他有一段話是這樣的

It may not matter,if you wear your HG(headgear)or  functional appliance during the day

if you put it on right after dinner & wear until the next morning

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