Distraction osteogenesis for the cranio-maxillofacial region: from basic science to clinical applications

Free Paper SessionpostprintAnnual Meeting of the Association of British Academic Oral and Maxillofacial Surgeons, ABAOMS 201

Changes in the faces and smiles of patients with dentofacial deformities

In recent years, new materials and more versatile techniques have made it possible for increasingly complex dentofacial deformities to be treated by multidisciplinary teams, with maxillofacial surgeons and orthodontists as the core team members. This lecture will demonstrate the treatment of these challenging cases. Through teamwork, maxillofacial surgeons and orthodontists can bring back smiles to these patients.postprin

Mesenchymal Stem Cell Approach for Maxillary Sinus Grafting

Autogenous bone has long been a gold standard grafting material for bone defects. It possesses osteogenic, osteoinductive and osteoconductive properties ideal for bone healing. However, the need of a donor site surgery and related morbidities remain a major concern to the patients. Therefore, bone substitutes have been recognised to be alternatives to autogenous bone. Since they are cell-free materials providing at their best only osteoconductive property, the concept of introducing mesenchymal stromal cells (MSCs) creates a lot of interest. This MSCs strategy can potentially contribute all the three osteo-regenerative properties similar to autogenous bone graft. The MSCs are commonly harvested by aspiration methods from the posterior hip of the same host. The cell number can be amplified by culturing in the laboratory for a period of time or concentrated using a centrifuge and dedicated systems to achieve sufficient quantity for immediate transplantation. Its application in oral and maxillofacial regions, particularly on maxillary augmentation for dental implant rehabilitation, has been researched with promising clinical results

Treatment of craniofacial syndromes by distraction osteogenesis: preliminary results

Congress Theme: Challenges to specialists in the 21st centurypublished_or_final_versio

Trigeminal neurosensory deficit and patient reported outcome measures: the effect on quality of life

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Effectiveness of Educational Poster on Knowledge of Emergency Management of Dental Trauma - Part 2: Cluster Randomised Controlled Trial for Secondary School Students

Objective To investigate the effectiveness of educational poster on improving secondary school students' knowledge of emergency management of dental trauma. Methods A cluster randomised controlled trial was conducted. 16 schools with total 671 secondary students who can read Chinese or English were randomised into intervention (poster, 8 schools, 364 students) and control groups (8 schools, 305 students) at the school level. Baseline knowledge of dental trauma was obtained by a questionnaire. Poster containing information of dental trauma management was displayed in a classroom for 2 weeks in each school in the intervention group whereas in the control group there was no display of such posters. Students of both groups completed the same questionnarie after 2 weeks. Results Two-week display of posters improved the knowledge score by 1.25 (p-value = 0.0407) on average. Conclusion Educational poster on dental trauma management significantly improved the level of knowledge of secondary school students in Hong Kong.published_or_final_versio

Incidence of neurosensory deficits and recovery after lower third molar surgery: a prospective clinical study of 4338 cases

A prospective study of all lower third molar surgery performed in the outpatient extraction clinic of a teaching dental hospital was conducted from January 1998 through October 2005 to determine the incidence of subsequent neurosensory deficit due to inferior alveolar nerve (IAN) and lingual nerve (LN) injury, to examine possible contributing risk factors and to describe the pattern of recovery. 3595 patients were included (61% female, 39% male; age range, 14-82 years). Of the 4338 lower third molar extractions performed by various grades of operators, 0.35% developed IAN deficit and 0.69% developed LN deficit. Distoangular impaction was found to increase the risk of LN deficit significantly (p < 0.001). Depth of impaction was related to the risk of IAN deficit (p < 0.001). Undergraduates caused more LN deficits (p < 0.001). Sex, age, raising of a lingual flap, protection of LN with a retractor, removal of distolingual cortex, tooth sectioning and difficulty in tooth elevation were not significantly related to IAN or LN injury. Postoperative recovery from IAN and LN deficits was noted most significantly at 3 and 6 months, respectively. By the end of the follow-up period, 67% of IAN deficits and 72% of LN deficits had recovered completely. © 2009 International Association of Oral and Maxillofacial Surgeons.postprin