Worse, dentists cannot get their instruments into such patients 'mouths to treat teeth that have become painful and inflamed. When these teeth need to be extracted, dentists must cut through the patients' lips to do so.
更糟的是，牙齒腫痛發炎時，牙醫的器械也進不去，若是惡化到必須拔牙，須將嘴唇切開才能拔除！