Special Interest Group for Bone Anchored Limbs
About SIGBAL
Scope
SIGBAL will focus on persons with both upper and lower limb amputation who may be candidates for a bone-anchored limb. A bone-anchored limb is an innovative method of attaching artificial limbs to the human body.
In SIGBAL, the members work together to provide optimal care for persons with limb amputation. The membership may consist of, but not be limited to, prosthetists, technicians, rehabilitation specialists, physiotherapists, occupational therapists, surgeons, engineers, and researchers.
Objectives:
- To create an overview of teams / healthcare professionals involved in bone-anchored prosthesis treatment.
- To facilitate partnership between members of SIGBAL to discuss complex treatment-related issues
- To create a core outcome set for bone-anchored prosthesis treatment to facilitate international collaboration.
- To create a knowledge agenda aimed at identifying the obstacles in the field of bone-anchored prosthesis treatment.
- To organize a joint meeting during the ISPO Int’l World Congress at least every two years.
- To explore the need for an accreditation system for institutions to facilitate an informed choice for patients seeking bone-anchored prosthesis treatment.
- To explore the need for a global data management system to facilitate joint publications.
Increase the visibility of your research!
Are you working on bone-anchored limbs? Share your scientific publications on the this website. Just fill out this quick form and showcase your work to a global audience!
Events & Activities
Recommended regular conferences relating to bone anchored limbs and upcoming SIGBAL meetings.
Resources
We kindly request your patience as this section of our website is currently under construction. We are diligently working to create content that meets our standards of excellence.
Guidelines
Development of the Bone-Anchored Lower Limbs Core Outcome Set (BALLCOS)
Bone-anchored limbs for persons with a lower extremity amputation have been available for over 30 years, however there is no agreement on a standardized set of outcomes. This limits (international) collaboration and thereby the possibility to push the field forward. To learn more about Core Outcome Measures in Effectiveness Trials (COMET) visit: https://www.comet-initiative.org.
The Special Interest Group for Bone-Anchored Limbs (SIGBAL) aims to develop a core outcome set (COS) that represents the minimum that should be measured in clinical practice and reported in scientific research of bone-anchored limb users.
Phase 1: Development of a comprehensive list of relevant functional and adverse events outcomes
- Step 1: Developing a comprehensive list of outcomes that may be important to BAL- users
- LEAD / Compass
- Literature review
- Online questionnaire
- Step 2: Expert panel (advisory committee and steering committee)
Phase 2: Two-round Delphi
- Round 1: first selection
- Round 2: second selection
- Round 3: final selection
Phase 3: Ranking meeting
- Until December 2024: step 1 of phase 1
- January – March 2025: step 2 of phase 1
- March – April 2025: Round 1 and 2 of phase 2
- May 2025: Round 3 of phase 2
- June 2025: Round 3 of phase 2
Patient Journey & Treatment Team
We kindly request your patience as this section of our website is currently under construction. We are diligently working to create content that meets our standards of excellence.
Need more info?
On our Members Only pages you may find extensive additional information. Please join us!
Our group is happy to answer any of your questions. Please email us at sigbal@ispoint.org.
SIGBAL Board Members 2025-2027
Jan Paul Frölke
President
Netherlands
Jason Stoneback
Vice President
United States
Rickard Brånemark
Past President
Sweden
Laurent Frossard
Research Member
Australia
Ruud Leijendekkers
Physiotherapist Member
Netherlands
Marta Geada
CPO Member
Australia
Mitch Grant
BAP Expert User Member
Australia
Rickard Brånemark
Surgeon
Sweden
Per Rickard Braanemark, MD, PhD, presently Research Affiliate at the Biomechatronics Group at MIT Media Lab, Cambridge, MA, Associate Professor at the Department of Orthopaedics, Gothenburg University, Gothenburg, Sweden, Professor Emeritus at the Department of Orthopaedics, University of California, San Francisco, CA, Founder and Board Member of Integrum AB, a public company listed on First North, NASDAQ, Stockholm, Sweden, and one of the most experienced osseointegration orthopaedic surgeons in the world.
He was the lead surgeon for the team that in 2013 treated a patient with an above elbow amputation with a combination of a percutaneous osseointegrated implant and implanted muscle and nerve electrodes. He received the Hanger prize for his contribution to amputee treatment in 2007, the UCSF Presidential Chair Award in 2016, the Brian and Joyce Blatchford Prize in 2017, the Per Udde’n Prize in 2017, and the Henry Wallman Prize in 2019.
Rickard has published more than 80 scientific peer-reviewed papers on different aspects of osseointegration ranging from material properties to in-depth patient interviews, focusing on clinical outcomes, biomechanics and interface analysis.
Jan Paul Frölke
Surgeon
Netherlands
Dr. Jan Paul Frölke is an (orthopedic) trauma surgeon specialized in complex limb reconstruction and amputation care. With a focus on innovation and patient-centered solutions, he is dedicated to improving the quality of life for individuals facing limb loss. His work includes advanced surgical techniques for amputation, as well as the implantation of bone-anchored prostheses (osseointegration) to restore mobility, comfort, and independence.
With extensive experience in both acute trauma care and long-term rehabilitation, he collaborates closely with multidisciplinary teams to provide comprehensive treatment tailored to each patient’s needs. His commitment is to offer the highest standards of surgical care, while continuously advancing the field through research, education, and innovation.
Dr. Jan Paul Frölke is associate professor limb amputation surgery at Radboud University Medical Center in Nijmegen and also works at his private clinics AOFEClinics in Rozendaal both in The Netherlands
Laurent Frossard
Bionic Limbs Scientist
Australia
Professor Laurent Frossard is a bionic limbs scientist passionate about developing ground-breaking prosthetic solutions to improve life of individuals suffering from limb loss. Internationally recognized as independent expert, he approaches bionic solutions from an all-rounded perspective integrating prosthetic biomechanics, clinical benefits, service delivery and health economics.
Mitch Grant
Osseointegration Patient Expert User
Australia
Mitch Grant is an osseointegration patient advocate, industry expert, and entrepreneur who has dedicated his career to advancing access to innovative prosthetic solutions for people living with limb loss. In 2011, Mitch became one of the first patients in Australia to undergo osseointegration surgery, an experience that profoundly changed his life and gave him a unique perspective on both the challenges and transformative possibilities of this technology.
Drawing on his lived experience, Mitch has worked closely with clinicians, surgeons, and patient groups around the world, sharing his story and educating others on the benefits and realities of osseointegration. He has played a key role in supporting the adoption of this technology internationally, helping bridge the gap between patients, medical professionals, and the broader limb loss community.
Mitch is also the founder of Good Vibes Medical Division and Osseo, companies that focus on supporting patients before, during, and after surgery, as well as distributing cutting-edge prosthetic devices across Australia. Through his businesses, he has been instrumental in making osseointegration and other advanced prosthetic solutions more accessible to people who need them.
With his combination of first-hand experience, business acumen, and passion for improving patient outcomes, Mitch brings a unique and invaluable perspective to the SIGBAL board.
Ruud Leijendekkers
Physiotherapist, PhD
Netherlands
Dr. Ruud Leijendekkers is a physiotherapist and associate professor at Radboud university medical center (Netherlands, Nijmegen). He received his master’s degree from Utrecht University (2016) and obtained his PhD in 2019 (Radboudumc). He provides outpatient rehabilitation of patients with a lower extremity amputation, both within the socket-suspended prosthesis and the bone-anchored prosthesis program. His research interests are organization of amputation and prosthetic care, rehabilitation, stump-prosthesis interface, and development and (volitional) control of motorized prosthetic components.
Marta Geada
CPO Member
Australia
Originally from Lisboa, Portugal, Marta Geada graduated in 2012 before moving to London, where she spent five years at the Royal National Orthopaedic Hospital specialising in paediatric prosthetics. In 2017, she joined APC Prosthetics in Australia and currently serves as the Branch Manager of the Alexandria clinic, which is renowned for integrating cutting-edge technologies in prosthetic patient care.
Marta specialises in lower limb prosthetics and is a key member of the multidisciplinary Osseointegration clinic at Macquarie University Hospital. She is recognised as one of the leading prosthetists globally in the field of Osseointegration, contributing her expertise to advance complex prosthetic rehabilitation solutions.
Jason Stoneback
Surgeon
United States
Jason W. Stoneback, MD is an Associate Professor in the Department of Orthopedics at the University of Colorado School of Medicine. He serves as the Vice Chair of Clinical Affairs, Chief of Orthopedic Trauma and Fracture Surgery, and Director of the multidisciplinary Limb Restoration Program at the University of Colorado Hospital.
Dr. Stoneback’s clinical and research interests center on an interdisciplinary approach to optimizing outcomes for patients with limb loss or at risk of limb loss. As Director of the Osseointegration Program and Bone-Anchored Limb Research Group (BALRG) at the University of Colorado, he leads efforts to advance innovative surgical techniques and comprehensive amputee care. His program specializes in both screw and press-fit osseointegration techniques, offering cutting-edge solutions to restore mobility and improve quality of life.
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