* M.E. Mueller Award 2024 goes to Kamal Deep, MD, UK* Combined ISCAOS plus CAOS-UK membership option available


The mission of the International Society for Computer Assisted Orthopaedic Surgery is to provide an active link between clinical reality, basic research, computer science and application oriented engineering research for an interdisciplinary development and evaluation of innovative solutions for a better health care. To date, the majority of innovative CAOS solutions have been initially proposed and evaluated on CAOS meetings. Apart from international interdisciplinary exchange and cooperation for and a practical transfer and implementation of scientific findings, the education of our students from different disciplines and specialties is a major objective.

CAOS members build an unique interdisciplinary community of clinical experts (about 50%) and engineers as well as computers scientists. This interdisciplinarity is also reflected in our boards and thematic focus groups, the traditionally single track joint interdisciplinary annual meetings with clinical as well as technical best paper and poster awards - and last but not least – in the impressive list of clinical and technical pioneers who received the prestigous M.E.Müller Award for excellence in Computer Assisted Surgery and Honorary Members of our society.

For the transfer of innovations into approved clinically usable commercial products as well as to foster education, training for patient safety and to prepare our student for their career in clinic, research or industry, the cooperation with established industrial partners and innovative start-ups is crucial. Therefore, we explicitly invite industrial partners to cooperate as corporate members of our society.

Contact us

Klaus Radermacher, PhD
Secretary General
International Society for Computer Assisted Orthopaedic Surgery
Helmholtz-Institute Aachen

Pauwelsstrasse 20
D-52074 Aachen

T: +49-241-80-23873
F: +49-241-80-22870

Skype: caosinternational

Executive Board

AO Foundation

Germany, President

Japan, President Elect

Netherlands, 1st Past President

Thailand, 2nd Past President

France, Chairman

USA, 1st Past Chairman

Japan, 2nd Past Chairman

Germany, Secretary General

UK, Past Secretary General

Canada, Treasurer

Canada, Program Committee Chairman

France, Program Committee Vice Chairwoman

UK, Past Program Committee Chairman

Israel, Member at Large

Egypt, Fellowship Lead

Hong Kong, Member at Large

France, Joint Research Coordinator

Netherlands, Joint Research Coordinator

Germany, Young Investigator

France, Young Investigator

Germany, Website Coordinator

Honorary Members

Professor Maurice E. Müller

(28 March 1918 – 10 May 2009)

From 1963 to 1980 Prof. M.E. Müller, M.D. was professor at the University of Bern and head of orthopedic surgery at the Inselspital in Bern, Switzerland. The Maurice E. Müller Institute for Biomechanics (MIB) in Bern was founded in 1981 as a joint venture between the Maurice E. Müller Foundation and the University of Bern. It aims to continue and extend the work of Maurice E. Müller in biomechanical research and teaching. Consequently the 1st Annual CAOS-Symposiumtook place 1995 in Bern organized by the MIBbringing together about 20 pioneers in the field. On the 1st General Assembly of International Society for Computer Assisted Orthopaedic Surgery in 2001 Professor Maurice E. Müller was unanimously elected the first honorary member of the society.

Professores Lutz-P. Nolte and Anthony (Tony) DiGioia, III, M.D.

Lutz-P. Nolte, PhD is professor emeritus for Surgical Technology and Biomechanics at the University of Bern, Switzerland. He organized the 1st Annual CAOS-Symposium in 1995 in Bern.

Anthony (Tony) DiGioia, III, M.D., is founder and medical director the UPMC Bone and Joint Center and The UPMC Innovation Center in Pittsburgh, USA. In 1997 he organized the first CAOS/USA symposium in Pittsburgh. In 2001 the International Society for Computer Assisted Orthopaedic Surgery (CAOS-International) was founded and the Bern and Pittsburgh CAOS-Symposia joined forces under the guidance of Lutz and Tony at the 1st annual symposium 2001 in Davos.

On the General Assembly of CAOS-International in 2019 Lutz-P. Nolte and Anthony M. DiGioia were unanimously elected honorary members of the society.

Professor Brian Davies

Prof Brian Davies is Professor of Medical Robotics at Imperial College London, where he has been since 1984. He started research into robotic Orthopaedic Surgery in 1991 together with Prof Justin Cobb and they formed the Acrobot Company Limited together in 1999, which was subsequently sold to Stanmore Implants worldwide in 2010. Brian attended all the early CAOS meetings in Bern, Philadelphia and Davos, before the formal founding of CAOS International in 2000. Brian then became Chair of the Program Committee as well as a member of the Executive for 16 years. More recently he has founded a spin off Company "Signature Robot Ltd", to provide a very small cooperative robot for unicondylar knee surgery.

On the General Assembly of CAOS-International 2022 in Brest, Brian Davies was unanimously elected honorary member of the society.

Stéphane Lavallée, PhD

Maurice E. Müller Award and four-time Worldwide Innovation Challenge winner, Stéphane Lavallée is a pioneer in the field of surgical robotics and a serial entrepreneur with an impressive track record. During his thesis in 1989, he developed the first robot used in clinical routine to place electrodes or biopsy needles in the brain. He then invented pre-op CT image registration with intra-operative data, navigated ACL surgery and image-free navigation. He founded Praxim, acquired by Omni, A2 Surgical (Hip arthroscopy simulation software), acquired by Smith Nephew, Traumis Surgical (intramedullary nail distal locking), acquired by Johnson & Johnson, Blue Ortho, acquired by Exactech (ExactechGPS product), Orthotaxy, acquired by Johnson & Johnson (Velys knee robot) and eCential Robotics, which has developed a robotic 5-axis, optimized 2D x-ray C-arm with integrated 3D image reconstruction and real-time navigation product and robotics. He is the co-inventor of over two hundred international patents, co-author of 150+ International scientific publications (journal articles & conference proceedings) and the co-editor of "Computer-integrated surgery", MIT Press, 1996.

On the General Assembly of CAOS-International 2022 in Brest, Stéphane Lavallée was unanimously elected honorary member of the society.

Maurice E. Müller Award for Excellence in Computer Assisted Surgery

The Maurice E. Müller Award for Excellence in Computer Assisted Surgery is conferred at the Annual CAOS-International Meetings. It recognizes a career long contribution to Computer Assisted Surgery, with achievements that have had a fundamental effect in advancing this research field. A board of referees selects individuals whose contribution fostered excellence in Computer Assisted Surgery to the present. From 1999-2012 has been sponsored by the M.E. Müller Foundation. Since 2013 the M.E.Müller Award endowed with CHF 5'000.00 is sponsored by Medacta International S.A.

Dr. Carolyn Anglin has always advocated for the educational benefits of CAOS, as a way of understanding orthopaedic surgeries differently and better. She was a Professor of Biomedical Engineering at the University of Calgary and is a Co-Founder and Director of Tactile Orthopaedics, which creates realistic knee and shoulder models for orthopaedic surgical training. The company spun out of her lab. Dr. Anglin is a co-inventor on numerous patents, and has published widely on knee, shoulder, and hip biomechanics, imaging, CAS, and medical devices.

Justin P. Cobb is a British professor of orthopaedic surgery at Imperial College London, known for introducing medical robotics into orthopaedic surgery. He is a member of the Royal Medical Household and is royal orthopaedic surgeon to the Queen. He is on the staff at King Edward VII's Hospital (KEVII) and is civilian advisor in orthopaedics to the Royal Air Force (RAF). His research has also included themes relating to designing new devices such as for ceramic hip resurfacing, 3D printing in orthopaedics, and training in surgical skills. He is a director of the MSk laboratory based in the Sir Michael Uren Hub. He is a recipient of the Hunterian Professorship, awarded for his work on surgery and osteosarcoma. Together with engineer Brian Davies from Imperial, he developed the world's first haptic based robotic assistant known as 'Acrobot', used to assist in knee surgery. He was the Conference Chair of CAOS 2011 in London, UK, and was President of the CAOS Society 2010-11.

Prof. Moshe Shoham, D.Sc., is the Head of the robotics laboratory at the Technion-Israel Institute of Technology, Department of Mechanical Engineering since October 1990 and has been a professor in the Department of Mechanical Engineering at the Technion-Israel Institute of Technology since October 1989. Prof. Shoham is an acclaimed authority in the field of robotics. Prior to that, Dr. Shoham served as the director of the robotic laboratory in the Department of Mechanical Engineering at Columbia University from September 1986 to September 1989. Prof. Shoham has served as a foreign member of the National Academy of Engineering in the United States since October 2014. He is the Co-Founder of Mazor Robotics Ltd., in 2001 and has also been its Chief Technology Officer since 2003. Prof. Shoham co-founded Microbot Medical Inc. in 2010 and serves as its Scientific Director. He is a Co-Founder of Guide-X Ltd. He is a Co-Founder of Microbot Israel and has been its Chairman of Scientific Advisor Board. He served as a Director of Microbot Medical Inc. since November 2010 until December 12, 2017 and serves as its Member of Scientific Advisory Board. He has been Director of Microbot Israel since November 2010. He serves as Member of Scientific Advisory Committee at MIGAL - Galilee Research Institute LTD.

Prof. Jenny is an orthopedic surgeon, currently senior consultant at the University Hospital in Strasbourg (France) and Associate Professor at the Strasbourg University. He specialized in adult joint reconstruction, was involved for more than 15 years in the development of navigation systems.

Dr.Hodgson is a Professor of Mechanical Engineering at the University of British Columbia in Vancouver. He holds a PhD in Medical Engineering and Medical Physics from Harvard-MIT. He directs the Surgical Technologies Lab and the Medtech Development Hub, and recently served as Director of the Graduate Program in Biomedical Engineering (2010-17) and as president of the International Computer-Assisted Orthopaedic Surgery Society (2014-15).

Stephen B. Murphy MD is a surgeon, inventor and medical device developer who specializes in hip and knee reconstruction at New England Baptist Hospital in Boston. He is an Associate Professor at Tufts University School of Medicine. He majored in Engineering Sciences at Dartmouth College and received his MD from the Weill Cornell Medical College. He received his residency training at the Combined Harvard Orthopedic Residency program, completed two research fellowships in orthopedic biomechanics and the Maurice Muller Fellowship in Reconstructive Surgery at the Massachusetts General Hospital, the Brigham and Women’s Hospital, and in Switzerland.

He is Professor at the University of Brest, an orthopedic Surgeon at the Brest University Hospital, and a Doctor of Science in health engineering. He is the Director of the Laboratory of Medical Information Processing (LaTIM - INSERM U1011) and has coordinated several national research projects in the field of CAOS.

He is a Professor at Queen's University at Kingston. His primary Queen's appointment is in the School of Computing, and he is also appointed as a Professor in the Department of Mechanical Engineering and as a Professor in the Department of Surgery.

Chief of Staff in the University Department of Orthopaedic Surgery (Joseph Fourier University, Grenoble) from 1993.

He is professor for medical engineering at the RWTH Aachen University of Technology in Aachen, Germany. He introduced and pioneered the idea of patient specific instruments ("individual templates" or "PSI") with its first clinical application in 1993 (first patent application in 1992). From 1997 to 2001 he was coordinator of the European project CRIGOS on the development of a compact robots for image guided orthopaedic surgery and from 2010 he initiated the 18,5 MEuro consortial project OR.NET (2012-2016 project coordinator) on open and secure digital networks in the operating room of the future.

His computer-related research work further led him to play the role of leading orthopaedic surgeon in the area of computer-aided surgery in Japan from 1997. His main interests in this area are robotics, navigation and preoperative planning for joint replacement surgery.

He has published over 150 technical works including conference and journal papers, book chapters, and editorials in these areas and has served on numerous related program committees.

Since 2005 he has established a clinical research unit at the Golden Jubilee National Hospital in Glasgow(UK) in which his team has produced significant research work on computer assisted knee and hip surgery.

Work covers a wide range of topics including surgical planning and simulation, surgical navigation and medical robotics and postoperative evaluation.

First research work was based on the use of a robot for stereotactic neuro-surgery and he described with Jocelyne Troccaz a new technique.

American Academy of Orthopaedic Surgeons, The Hip Society of North America, The International Knee Society, The Knee Society of North America (Charter Member), Orthopaedic Research Society, The International Society for the Study of Custom Prostheses (Co-founder and 1st President)

He is a founder and Technical Director of the spin-off Company Acrobot Limited, who specialise in research and clinical application of minimally invasive robots for Orthopaedic Surgery.

National Science Foundation and Faculty Fellowships from the Baxter Foundation and Powell Foundation.He is a Morgenthaler Faculty Scholar at Stanford and is a Fellow of the American Institute of Medical and Biological Engineering.

He specializes in adult reconstructive surgery including less and minimally invasive surgical techniques for total joint replacements.Dr. DiGioia was born and raised in Pittsburgh.

CAOS-USA, North America s twin of these conferences, as well as a considerable number of regional CAOS meetings were launched in the subsequent years, following the concept set by the Switzerland-based symposiums.

The implementation of a robot into a surgical procedure demanded breakthrough technical solutions in many regards, which were one by one developed under the auspices of Russ Taylor, today one of the wordwide leading experts in medical robotics.

Orthopaedic surgery is the area where Philippe Cinquin obtained most achievements, in particular for his inventions in spine, knee, and pelvic surgery.


Since 1995 five CAOS-Symposia (Computer Assisted Orthopaedic Surgery) were held in Bern and Davos, Switzerland.

In 1997 started CAOS/USA, the North American program, which was held since then on an annual basis.
With the foundation of CAOS-International, the sixth CAOS-Symposium has become the First Annual Society Meeting in 2001.

In the same year we still continued with CAOS/USA.

From 2002 on CAOS/USA has been integrated into the annual meetings.

The Inaugural Meeting of our International Society for Computer Assisted Orthopaedic Surgeryplace on February 19, 2000 in Davos at 7:00 a.m. During this assembly, the membership accepted the draft of the by-laws for the Society proposed by Lutz-P. Nolte and Anthony M. DiDioia. After discussion, the by-laws were unanimously approved and the foundation of the Society was established. In our first vote, the executive officers were unanimously elected.

All officers accepted their position. In addition, the membership accepted to CAOS-International as the offcial abbriviation of our society.

Inauguration members

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  • Dr. Lutz-P. Nolte

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  • Dr. Anthony M. DiGioia
    First Vice-President

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  • Dr. Pietro F. Reggazzoni
    Second Vice-President

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  • Dr. André Bauer
    Secretary General

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  • Dr. Branislav Jaramaz

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  • Dr. Willy A. Kalender
    By-Law Chairman

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