1. Department of Oral and Maxillofacial Surgery, Guanghua School of Stomatology; Hospital of Stomatology, Guangdong Provincial Key Laboratory of Stomatology, Sun Yat-Sen University; Guangzhou 510055 China
2. Department of Biomedical Engineering, School of Engineering, Guangdong Provincial Key Laboratory of Sensor Technology and Biomedical Instrument; Sun Yat-Sen University; Guangzhou 510006 China
3. Department of Prosthodontics, Guanghua School of Stomatology; Hospital of Stomatology, Sun Yat-Sen University; Guangzhou 510055 China