Academic Report： Biomechanics of Soft Tissues for Orthodontics and Dentofacial Orthopedics
Speaker：Professor Qing Li，University of Sydney
Time：2017.12.20 10:00AM
Location：Teach 12-118
Abstract:
The seminar will first give an introduction to the School of Aerospace, Mechanical and Mechatronic Engineering, the University of Sydney, which includes the education programs and research strengths.
Despite increasing understanding in the importance of genetic and biological cues to bone remodelling, mechanical loading remains a critical factor in modulating skeletal morphology. While it is accepted that the musculoskeletal system adapts to its functions through various mechanical loading, it remains unclear why tens of kilograms of weight are required for orthopaedic rehabilitation to achieve a small amount of bone remodelling, whilst only tens to hundreds of grams force stimulates significant bone remodelling in orthodontic therapy]. How could the bones in the same body purposely adapt to such three orders magnitude difference in mechanical force? This study explores that soft connective fibrous tissues, such as periosteum, endosteum and periodontal ligament (PDL), on internal and external surfaces of bone play an important role in sensing “transverse” tension and compression in a way different from longitudinal stimulation in intracortical tissue, thereby driving the bone’s lateral surface to remodel. In this study, computational modeling and remodeling procedures are developed here to simulate how the connective soft tissue plays a role in affecting bone’s remodelling. Three different cases in dental orthopaedics were presented in this seminar: (1) the role of mucosa in bone resorption induced by different denture treatments; (2) the role of soft tissue dental follicles in tooth eruption and jaw development; (3) the role of periodontal ligament (PDL) in orthodontic tooth movement. Each of these modelling cases was correlated to long term clinical results. The roles of soft connective tissues are revealed for further studies.
Brief Biography:
Professor Qing Li obtained his PhD degree in aerospace engineering from the University of Sydney, Australia in 2000. He received postdoc training from Cornell University, NY, USA. He was a recipient of an Australian Research Council (ARC) Australian Postdoctoral (APD) Research Fellowship in 2001 (55 awarded nationwide). Dr Qing Li was a senior lecturer in School of Engineering, James Cook University, Townsville, Australia from 2004 to 2006. He returned to University of Sydney by taking up a Sesqui senior lectureship in 2006, where he was promoted through all the ranks to Professor. Professor Qing Li is now an ARC Future Fellow in the School of Aerospace, Mechanical and Mechatronic Engineering, at the University of Sydney. His research interests include computational biomechanics, scaffold tissue engineering, structural optimisation and vehicle safety/crashworthiness design. He published over 240 articles in leading international journals, with an h-Index of 37 in Thomson Reuters (Wed of Science) and 49 in Google Scholar.
He was the Secretary for the 9th World Congress on Computational Mechanics (2010) and Chair for 11th World Congress on Structural and Multidisciplinary Optimization (2015) in Sydney. He was also a recipient for APACM computational mechanics