1. Guangdong Provincial Key Laboratory of Stomatology, Department of Operative Dentistry and Endodontics, Guanghua School of Stomatology, Affiliated Stomatological Hospital Sun Yat‐sen University Guangzhou Guangdong China
2. Regenerative Health Research Laboratory Department of Endodontology, Kornberg School of Dentistry Temple University Philadelphia Pennsylvania
3. Department of Oral Health Sciences, Kornberg School of Dentistry Temple University Philadelphia Pennsylvania
4. Department of Bioengineering, College of Engineering Temple University Philadelphia Pennsylvania