A man from recently received a root canal treatment for the upper row of molars. He did not return for treatment because it was not painful. After eating fried chicken steak for a while, the tooth was completely broken. The
Hello everyone! Recently, the Covid-2019 virus has struck, and experts recommend wearing a mask when going out. Masks are divided into several categories, so what is the difference between the most common KN95 and N95 masks? Please see below for
In addition to self-made masks and temporary masks, their types are mainly divided into surgical masks (medical masks) and dust masks (industrial masks). There are many kinds of materials. The National Institute of Occupational Safety and Health (NIOSH) divides the
The Covid-19 was discovered in 2019. Corona viruses are a large family of viruses known to cause colds and more serious diseases such as Middle East Respiratory Syndrome (MERS) and Severe Acute Respiratory Syndrome (SARS). Therefore, everyone should take precautions.