Pulpitis In Han, Mr. Zhang Zhong Jing Jin Gui Yao lue was a very famous writings in which there was a record about arsenic Arsenic is a toxicant medicine which has been generally used for killing pulpPulpitis In Han, Mr. Zhang Zhong Jing 《Jin Gui Yao lue》was a very famous writings in which there was a record about arsenic Arsenic is a toxicant medicine which has been generally used for killing pulp