Chi Yang, PhD, MD, DDS, is the chief of Department of Oral Surgery in Shanghai 9th People's Hospital. He was trained in Shanghai Jiaotong University College of Medicine and gained DDS and MD degree in Shanghai 9th People's Hospital in 1994?followed the guidance of academician Qiu Weiliu. He then became faculty in the Department of Oral and Maxillofacial Surgery. He visited several American university hospitals as UCLA, Mass General Hospital and Maryland University as faculty from 2000 to 2001.

Prof. Yang' clinical specialty is open surgery and arthroscopic surgery to treat all kinds of temporomandibular joint diseases, complicated joint-skull reconstructions and combined treatment of joint-jaw-occlusion to deal with TMJ disease with jaw deformity and malocclusion. Prof. Yang is the international faculty of AO and S.O.R.G. Professor Yang is also the vice Chairman of TMJ Disease and Occlusion Special Committee of Chinese Stomatological Association; standing committee member of Chinese Society of Oral and Maxillofacial Surgery; head of TMJ surgery cooperative group of Chinese Society of Oral and Maxillofacial Surgery; trustee member of the Asian Oral and Maxillofacial Surgeon Association; international member of the American TMJ Surgeons Society. He is the managing Editor of China Journal of Oral and Maxillofacial Surgery, Shanghai Journal of Stomatology and Oral and Maxillofacial Surgery, Chinese Oral Medical Research Journal and Chinese Journal of Dental Materials and Devices.

Prof. Yang has been invited to the European and International Conferences as speaker for 18 times including 31 topics in the recent years. He has also been invited for international surgical live demonstration 15 times in 9 countries. 70 international scholars of 24 countries came to Shanghai specially to observe his operation. Professor Yang has accomplished more than 20 scientific research grants, published more than 300 papers including 121 English SCI papers and participated in editing 24 books. He has won the National Invention Award; the Progress Award of Health Science and Technology Ministry; Shanghai Medical Science and Technology Progress Award; Chinese Medical Science and Technology Award. He is the outstanding young teacher in Shanghai. He has applied for 12 patents and got 9 as the first one including 1 international invention patent.

Lucy Dongmei He received her DDS from Peking University, School of Stomatology (former Peking Medical University) in 1996, and her MD from the same University in 2001. She is currently a professor of the Department of Oral Surgery, Shanghai Ninth People's Hospital, Shanghai Jiaotong University School of Medicine. She is a member of Chinese Society of Oral and Maxillofacial Surgery, a member of the International Association of Oral and Maxillofacial Surgeons, as well as an editorial board member or peer-reviewer for the following journals: Chinese Journal of Stomatology, China journal of Oral and Maxillofacial Surgery, Shanghai Journal of Stomatology. She had 10 Chinese patents. She has been in charge of 7 grants including National Natural Science Foundation of China and other national and state founded grants. She contributed one book as a vice editor-in-chief, as well as a number of chapters in 6 professional books. She has published 36 SCI papers as attached file. She has won 2 national awards of treating condylar fracture and ankylosis. Her major clinical and research interests are TMJ disease and facial trauma.

Dr. Edwards received his dental degree from Dalhousie University in Halifax, Nova Scotia. He then came to the University of Michigan where he completed his medical degree and residency training in oral and maxillofacial surgery. He then completed fellowship training in pediatric cleft and craniofacial surgery at the University of Pittsburgh. A second fellowship in head and neck oncologic surgery and microvascular surgery brought him back to the University of Michigan where he has since remained as faculty.

Professionally, Dr. Edwards is the Chief of Pediatric Oral and Maxillofacial Surgery at C.S. Mott Children's Hospital and the residency program director. His research has focused on cleft and craniofacial care and sleep disorders, their genesis and treatment. Dr. Edwards serves on many regional, national and international committees, has served as a section editor for the International Journal of Oral and Maxillofacial Surgery, and reviews for many journals.

Dr. Brent Ward is an Associate Professor and Chair of the Department of Oral and Maxillofacial Surgery/Hospital Dentistry in the School of Dentistry and Section Head within the Department of Surgery at the University of Michigan Hospitals. He is Program Director of the Oral/Head and Neck Oncology and Microvascular Reconstructive Surgery Fellowship within the Section of Oral and Maxillofacial Surgery.

Dr. Ward received his dental degree from the University of Southern California, Los Angeles. He received his medical degree and completed postgraduate training including residency and fellowship at the University of Michigan prior to joining the faculty in 2003.

Dr. Ward specializes in the diagnosis and treatment of oncologic conditions with extensive experience in both ablative and reconstruction surgery. His research focuses include drug delivery of targeted therapies for cancer, physiologic triggered release of treatment for pain, and optimization of cancer care and free tissue transfer success. Dr. Ward serves in leadership positions on many regional and national organizations including the current past president of the American Academy of Craniomaxillofacial Surgeons.

Samantha Li is a statistician working as a Senior Technical Officer in the Faculty of Dentistry at the University of Hong Kong. She . She has taught research skills at the School of Professional and Continuing Education, the University of Hong Kong and currently provides statistical consultation on clinical trials including research design, randomization, sample size determination, data analysis and reporting.

Prof. Luigi C. Clauser, specialist in Maxillofacial Surgery and Odontostomatology, is a Clinical Professor at the University of Ferrara, Italy. His expertise covers facial reconstructions, implantology, orthognathic surgery, traumatology, orbital surgery, oral surgery, treatment of temporomandibular joint dysfunctions, and aesthetic surgery. He is an expert in the treatment of congenital craniofacial malformations and in the multidisciplinary treatment of exophthalmos in Graves' disease. Reconstruction of facial volumes by using Fat Grafting is also one of his main interests. In the 90's Prof. Clauser was one of the last of Paul L. Tessier's pupils in Paris. From 2006 to 2008, he held the position of President of the EACMFS. In 2008 he organized the 19 EACMFS Congress in Bologna, Italy. He is an advocate for promoting Maxillofacial Surgery in Eastern Europe and other continents with limited resources. Prof. Clauser has had the privilege of being an invited speaker at many congresses and scientifi c events worldwide. He has authored over 230 scientifi c publications, 9 chapters in books, and is a reviewer for many international scientifi c journals. In Europe he was among the fi rst surgeons to introduce the use of PiezoSurgery in facial and craniofacial reconstructive surgery. In May 2012, Prof. Clauser was invited to deliver the prestigious Wilhelmsen Lecture on Craniofacial Sciences at John Hopkins University, Baltimore, USA, as a special recognition for his remarkable contribution to the craniofacial discipline. Prof. Clauser has organized more than 80 international events with renown guest speakers coming worldwide.

Dr. Manlio Galié is clinical Professor at the St. Anna University Hospital of Ferrara, Head of the Department of Cranio Maxillo Facial Surgery - Center for Orbital Pathology & Surgery.
He has completed formal training in both Medicine MD and Dentistry DMD.
He specializes in Maxillo-Facial Surgery and in ENT Surgery.
Dr. Galié has lectured as invited speaker to numerous Seminars, Meetings, Roundtables and Congresses in Italy, Europe, and Worldwide.
Author of over 70 publications in National and International Journals he is a Member of the Editorial Board of the Journal of Cranio- Maxillofacial Surgery, of the Journal of Craniomaxillofacial Trauma and Reconstruction and of the Annals of Maxillofacial Surgery.
International Fellow at University of California, Los Angeles ( UCLA ), Craniofacial Center.
Fellow of the European Board of Oro - Maxillo - Facial Surgery ( FEBOMS ).
Education & Training Offi cer of the European Association for Cranio-Maxillo-Facial Surgery (EACMFS ).
Member of the European Clinical Network: EUROCRAN and ORPHANET.
Member of the following Associations: EACMFS ( Member of the Executive Committee ), SILPS, SICMFS (Member of the Executive Committee), IAOMS, ISCFS.

Dr. Flavia Cascino - Professional experience: Current: Successful candidates as Associate Medical Director at the "le Scotte" Hospital; Jen. 2017 - Jen.2015: Fellowship at the Maxillo facial department of the "Scotte" Hospital Certifi cation:Dec.2015: Anatomy of the Temporo-mandibular joint University of Roma-Paris, France; Dec. 2015 Multidisciplinary management of malignant oral cancer University of Roma-Rome, Italy; Oct.2015 Anti-aging theoretical and practical course Medical SPA-Rome, Italy; Mar. 2014 Implant Biofi br, Medical LTD- Carpi(MO), Italy; Jen. 2011 Certifi ed in Paediatric CPR, Italian Council of Resuscitation; Dec.2011 Dental- Scheletal Malformation: The ATM involvement in diagnosis and therapy. University of Roma, Rome, Italy; May 2011 ILS Provider Course European Resuscitation Council-Rome,Italy; Apr. 2010 Aesthetic Medicine Upgrade Promo Italia - Rome, Italy; Dic. 2009 Tumoral micro environment Accademia Medica di Roma-Rome, Italy; Oct. 2009 Implant Techniques intra ed extraoral. Iris Omnia Service-Amalfi (SA) Apr. 2009 National Congress of oral pathology and maxilla facial surgery. Collegio dei Docenti-Rome, Italy; Apr. 2008 Dentist in the world: education and research. Collegio dei Docenti di Odontoiatria - Rome, Italy; Mar. 2008 Cranio-facial malformation: Function and Aesthetic, Accademia Medica di Roma- Rome, Italy; Feb. 2008 Special Day Rare Diseases sponsored by Istituto Superiore di Sanità Rome, Italy Dic. 2007 Certified in CPR and First Aid, European Council of Resuscitation; Nov. 2007 Supermicro surgery congress University of Roma, Rome, Italy. Author of about 17 publications in National and International Journals.

Traditionally, a variety of surgical tools such as saws, drills, and osteotomies have been used in craniofacial and orbito-maxillo-facial surgery. Osteotomies in these areas risk injury to the adjacent structures and soft tissue. The Piezoelectric System (PS)is a relatively new surgical device that was fi rst introduced in 2000 by the Italian Tomaso Vercellotti in oral and dental-implant preprosthetic surgery. The system uses microvibrations at a specifi c frequency range around 20 to 30 kHz to cut mineralized tissue selectively, thus sparing surrounding soft tissue. Since its introduction, PS has been used in a variety of surgical fi elds, including neurosurgery, hand, otologic, and facial reconstructive surgeries: craniofacial, orbital-periorbital, orthognathic, distraction osteogenesis, and bone harvesting. The potential benefi ts of PS are particularly helpful in cranio-orbital surgery because of minimal damage to the surrounding soft tissue, improved visualization, and optimal bone healing. Longer operation time has been reported as a limit in orthognathic surgery. This is probably due to larger bone volume in mandibular osteotomies compared with the thin maxilla, orbital and periorbital bones. In any case, postoperative recovery is faster when using PS. The system also requires a short learning curve and adequate dexterity. The aim of this presentation is to describe the use of the piezoelectric ultrasonic device particularly in the upper orbito-cranio and maxillofacial area. An overview of 525 clinical cases operated on in the past 7 years by using PiezoSurgery, is also included.

Mandibular osteotomy is a surgical procedure which involves cutting of mandibular bone for shorthening, lengthening or changing the position. Conventional tools used in osteotomy and osteoplasty of the mandible include rotating/oscillating saws, drills, hammers and chisels. Using rotating and oscillating tools the risk of damage to fi ne bone and soft tissue appears substantial. This represents a great concern when navigating around extremely delicate structures during neurological, craniofacial, maxillofacial, oral and orthopaedic surgeries. The Piezosurgery device was developed with the aim of enhancing the surgeon's ability to perform meticulous bone surgery, while reducing the risk of intraoperative and postoperative morbidity. The advantage of the Piezosurgery device over conventional tools is its ability to cut soft and hard tissues selectively, thus enabling the surgeon to confi ne tissue destruction to the areas planned and preserve adjacent structures, such as neurovascular tissue. These advantages appears to be substantial in pediatric and neonatal mandibular DO for the treatment of sindromic micrognathia and Pierre Robin sequence. Distraction Osteogenesis procedure requires minimally invasive approaches indeed and some studies confi rmed the detrimental effect of an oscillating saw on bone formation. The use of Piezosurgery is mandatory in small surgical fi elds with limited view and in small mandibles to protect soft tissue, nerves and tooth buds. Distraction Osteogenesis and Pioezosurgery appears to be synergic as DO requires microvascularity from the periosteum, preservation of soft tissue and a dynamic biological microenviroment as provided by Piezosurgery bone cutting.

Piezosurgery was introduced in 2001, and was revolutionary for bone surgery in wide range of surgical procedures, e.g. impacted tooth extraction, elevation of the Schneiderian membrane, bone splitting or expansion of the ridge, corticotomy and even cystectomy. The piezosurgery device produces specifi c ultrasonic modulation (22.000-35.000) with a microvibration of 60 to 200 mm/sec. These specify characteristics insurance precision and safety with a micrometrical cutting. Moreover, the device decreases the intraoperatory bleeding and the post surgical edema, and consequently it reduces the recovery time as well as pain development, and it increases the secondary bone healing. Our experience with piezosurgery was based around orthognathic surgery. The use of Piezosurgery allows the surgeon to perform mandibular osteotomy with minor morbidity to the inferior alveolar nerve, compared with conventional saw technique; lesser VAS and swelling values were present on sides operated with Piezosurgery, and a reduced drug prescription was needed. Unfortunately time needed for sagittal split osteotomy with Piezosurgery resulted signifi cantly higher. Therefore, using piezosurgery plus devices instead of regular devices reduces the intraoperatory timing, which may determine a less invasive procedure in terms of a surgical stress time related.