2[1]Tanaka M, Kato K, Ono H. et al. Chemical Change of calcium hydroxide contained in root canal filling materials in serum.Shomi Shikagaku Zasshi, 1989, 27:41-5.
3[2]Kawakami T, Nakamura C, Eda S. Effects of the penetratiion of a root canal filling material into the mandibular canal. 1.Tissae reaction to the material. Endod Dent Traumatol, 1991,7: 36-41.
4Mohd SulongMZ. The incidence of postoperative pain after ca- nal preparation of open teeth using two irrigation regimes[J]. Int Endod J,1989, 22 (5) :248-251.