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4th William H. Bell Lectureship
Lim K. Cheung

Lim K. Cheung
Dr. Lim K Cheung
is the chair professor in Department of Oral and Maxillofacial Surgery (OMS), Faculty of Dentistry, The University of Hong Kong. He graduated as a Bachelor in Dental Surgery (BDS) from the University of Glasgow back in 1982. He attained several professional advanced dental qualifications from Scotland, Ireland and Australia (FDSRCPS, FFDRCS and FRACDS). He received further training in Glasgow and Adelaide, after which he was awarded with specialist degrees in oral and maxillofacial surgery [FRACDS (OMS), FCDSHK (OMS)] from Australia and Hong Kong. On the academic front, Prof. Cheung gained a PhD degree in oral and maxillofacial surgery from the University of Hong Kong.
Professor Cheung has actively contributed to the education of OMS in mainland China and Asian countries for many years. He is the Education Executive officer of the Executive Committee of the Asian Association of Oral and Maxillofacial Surgeons. He is editors of many journals, among which he is the editor of the Journal of Oral and Maxillofacial Surgery and Asian Journal of Oral and Maxillofacial Surgery. In recognition of his academic contribution, he received honorary professor appointment in mainland China from 11 universities. He also received 6 additional honorary professorships from universities in Australia, Thailand, Malaysia and India.

The current research interest of Professor Cheung is on obstructive sleep apnea, distraction osteogenesis, midface orthognathic surgery and 3-dimensional imaging. In his career, he has published over 200 papers and 260 abstracts.


Topic: Current Advances in Management of Midface Skeletal Deformities


Abstract: Midfacial skeleton is interdigitated by many pieces of bone into the most complex part of the facial skeleton thatsupport the functions of the teeth, nose, eyes and ear. Deformities of the midface can be expressed at different levels in different extent of severity. Syndromal craniosynostosis is usually accompanied with ocular proptosis whereas in non-syndromal midface deformity, the eyes are not affected. In Chinese, the retrusive midface is normally accompanied by maxillary dentoalveolar protrusion. In correction of this form of deformity, a combination of Le Fort III and segmentalized Le Fort I osteotomies are required to address the differential expression of deformities. The traditional Le Fort III design is useful for syndromal cases for simultaneous correction of exophthalmos whereas in non-syndromal cases, it is best done with an oblique osteotomy cut of the zygoma below the lateral canthus level. Recent advances in computer software planning, stereomodel simulation and surgical navigation machines enable good precision in the correction of midface deformities. The advancement of distractor designs also facilitates major advancement of the midface, which is particularly important for correction of obstructive sleep apnoea and ocular protection. The integrated use of modern technologies for the management of midface skeletal deformities in adult and children will be presented with illustrated cases.