Histological evaluation of three commonly used light-cured resin composite materials in the wedge-shaped defect repair of extracted teeth  
Wang Xue-mei1, Wu Wei-wei2, Gao Mei-zhen2, Zhao Zhong2, Yu Zhan-hai1
Chinese Journal of Tissue Engineering Research . 2012, (16): 2947 -2950 .  DOI: 10.3969/j.issn.1673-8225.2012.16.023