1Clinical study of stir-drilling miniscrew implant as orthodontic anchorage in the molar distal movement.WANG Xue-jin, PENG Wei, XU Ying-huaORIGINAL CONTRIBUTIONS212-2142Effects of Ni-Cr based porcelain-fused-to-metal crown on the periodontal tissueLI Rong-qing, KAN Hong-xia, ZHENG Zong-fuORIGINAL CONTRIBUTIONS215-216,2193Effects of smoking on periodontal therapy for patients with drug-induced gingival overgrowthZHENG Yao, FENG Hai-rong, WU Yong-shengORIGINAL CONTRIBUTIONS217-2194Comparison of clinical effect between cemented and screw-retained restorations for implant-borne superstruc-tures in anterior teethZHAO Bao-hong, DENG Chun-fu, ZHANG Chong, YANG Yan-changORIGINAL CONTRIBUTIONS220-2225The three-dimensional finite element stress analysis in the periodontal tissue of the left mandibular incisor and the first molar with tip back bendarehKANG Zhen-zhong, HU Min, WU Hong, LIU LeiORIGINAL CONTRIBUTIONS223-2256Comparative study of desoeelusoi and chloroform in retreatment of canal obturated with gutta-percha and seal-erLIU Yu-yan, WANG Cheng-kun, CHENG Min, ZHANG Zhi-min, TIAN Ying, DONG Shu-junORIGINAL CONTRIBUTIONS226-2287Using the PFM to cure individual scissors bite of adultsFANG Zhi-qiang, SHI Lian-shui, ZHANG Xiao-junORIGINAL CONTRIBUTIONS229-2308An analysis of the efficacy of transonogram atomization in treating erosive cheilitisSUN Yan, ZHANG Ying, KANG Yuan-yuanORIGINAL CONTRIBUTIONS231-233