1Microbes and Caries (1) A review of caries research in last centuryYue Song-ling597-6002Ultra structural study on indirect injury of dental pulp caused by high speed missile projectile in dogs' mandibleREN Chang-qun, ZHOU Shu-xia, TIAN Lei, LIU Rui-feng601-6053Effects of different ceramic surface treatments on the shear bond strength of Vita VMK95 ceramic material606-6084Periodontitis of the population in neolithic age from banpo museumZHANG Xuan, SHAO Jin-ling609-6125Cytotoxicity of 4 kinds of dental restorative materials on human pulp cell in vitro613-6166Mechanical properties of visible light-cured composite resin filled by incremental techniqueZHAO Xin-yi, KANG Biao, LI Feng617-6207Clinical evaluation on accuracy of a new apex locator-ProPex in molar working length measurementSHA Xin-jia, ZHU Wen-zhong, SUN Han-tang621-6238Ozone water for sterilization of root cannals Determination of concentration of ozone generated by a novel ozone generator624-6269A Vitro study on the apical sealing ability of coronal preflaring and different taper gutta percha obturation627-62910Retreatment of the teeth with open canal system by MTA630-63211Comparison of the effect of Vitapex and iodoform-zinc oxide eugenol paste on periapical periodontitis of deciduous teethZHOU Yu-xiang, YANG Ru-mei, WEN Qin633-63512A review on the factors affecting the long-term results of root canal therapy638-64013Comparison of methods in root canal morphology research641-64414Analysis of factors of the root canal prepared instrument fracture645-648