TITANIUM SURFACE FOR SOFT TISSUE REGENERATION IN IMPLANT DENTISTRY Feifei Mao, Nannan Li, Shuhui Chen, Yifei Zhang, Shu He, Shicheng Wei and Jing Chen Academy for Advanced Interdisciplinary Studies, Peking University, China Institution of Micro/Nano electronics, Peking University, China : Both authors contributed equally to this work ABSTRACT Different patterns on Ti substrate which mimic the e...