Summary

MyHip aims to develop a complete solution for the planning and execution of total hip arthroplasty (THA). By combining patient-specific morphology with hip kinematics and pelvic orientation, the project introduces a dynamic approach to surgical planning.

The planning method evaluates the behavior of the prosthetic hip during movement in order to define surgical parameters that reduce the risk of impingement, subluxation and dislocation. Intraoperative guidance tools (surgical guides) are also developed to accurately reproduce the preoperative plan during surgery.

Within MyHip, Artanim was responsible for developing the dynamic simulation module of the prosthetic hip, using motion capture data to reproduce patient-specific movement.

Partners

Jérôme Schmid, Christophe Chênes – Haute École de Santé (HEdS)
Radiological image processing and 3D postoperative reconstruction.

Caecilia Charbonnier – Artanim
Development of the dynamic simulation module of prosthetic hips.

Panayiotis Christofilopoulos – University Hospitals of Geneva, Department of Orthopedic Surgery and Traumatology
Clinical testing and medical supervision.

Massimiliano Bernardoni – Medacta International SA
Development of surgical guides and planning software, and industrial supervision.

Related Publications

Schmid J, Chênes C, Chagué S, Hoffmeyer P, Christofilopoulos P, Bernardoni M, Charbonnier C. MyHip: Supporting Planning and Surgical Guidance for a Better Total Hip Arthroplasty: A Pilot Study, Int J CARS, 10(10):1547–1556, 2015.
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Charbonnier C, Chagué S, Schmid J, Kolo FC, Bernardoni M, Christofilopoulos P. Analysis of Hip Range of Motion in Everyday Life: A Pilot Study, Hip Int, 25(1):82–90, 2015.
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Charbonnier C, Chagué S, Chênes C, Hoffmeyer P, Christofilopoulos P, Bernardoni M, Schmid J. Post-operative Kinematics Assessment in Patients after Total Hip Arthroplasty: A Pilot Study, Swiss Med Wkly, Suppl 204, 144:37S, 2014.
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Schmid J, Chênes C, Chagué S, Hoffmeyer P, Christofilopoulos P, Bernardoni M, Charbonnier C. Computer-assisted Total Hip Arthroplasty: from Pre-operative Planning to Post-operative Assessment, 14th Annual Meeting CAOS, Milan, Italy, June 2014.
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Schmid J, Chênes C, Chagué S, Christofilopoulos P, Charbonnier C, Bernardoni M. MyHip: Personalized Planning and Surgical Guidance in Total Hip Arthroplasty, Swiss Congress for Health Professions (SCHP), Bern, Switzerland, March 2014.
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Christofilopoulos P, Chagué S, Schmid J, Bartolone P, Hoffmeyer P, Charbonnier C. Using Motion Capture and MRI to Accurately Determine the Hip Range of Motion in Everyday Life, 26th ISTA Annual Congress, Miami, FL, USA, Bone Joint J, 95-B(Suppl 34):29, October 2013.
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Charbonnier C, Chagué S, Ponzoni M, Bernardoni M, Hoffmeyer P, Christofilopoulos P. Congruence and Impingement in Total Hip Arthroplasty during Everyday Tasks, 26th ISTA Annual Congress, Miami, FL, USA, Bone Joint J, 95-B(Suppl 34):27, October 2013.
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Charbonnier C, Chagué S, Ponzoni M, Bernardoni M, Hoffmeyer P, Christofilopoulos P. Assessment of Congruence and Impingement of Prosthetic Hips during Everyday Tasks, Swiss Med Wkly, Suppl 198, 143:32S–33S, 2013.
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Christofilopoulos P, Chagué S, Schmid J, Hoffmeyer P, Charbonnier C. Hip Range of Motion in Everyday Life, Swiss Med Wkly, Suppl 198, 143:27S, 2013.
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Christofilopoulos P, Chagué S, Schmid J, Bartolone P, Hoffmeyer P, Charbonnier C. Accuracy Assessment of Hip Clinical Exam, Swiss Med Wkly, Suppl 198, 143:27S, 2013.
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Summary

Many patients have questions about sexual activity after total hip arthroplasty (THA), yet the topic is often under-discussed in clinical practice. The hip range of motion required for different sexual positions, as well as the associated risk of prosthetic impingement or joint instability, had not been quantitatively assessed.

This study investigates 12 common sexual positions using in-vivo motion capture and magnetic resonance imaging with two volunteers. The recorded movements were used to drive patient-specific 3D models of the hip and prosthesis, allowing the relative risk of impingement and instability to be evaluated through computer simulation.

The objective is to provide surgeons and other healthcare professionals with scientifically grounded information that can help them answer patients’ questions and offer more specific guidance following total hip arthroplasty.

Partners

Artanim
Motion capture and analysis, and dynamic simulation of prosthetic hip models.

University Hospitals of Geneva – Department of Orthopedic Surgery and Traumatology
Medical supervision.

Medacta International SA
3D surgical planning and prosthetic hip modeling.

Related Publications

Christofilopoulos P, Charbonnier C. CORR Insights®: High Rates of Interest in Sex in Patients With Hip Arthritis, Clin Orthop Relat Res, 474(2):300–301, 2016.
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Charbonnier C, Chagué S, Ponzoni M, Bernardoni M, Hoffmeyer P, Christofilopoulos P. Activités sexuelles après arthroplastie totale de hanche (PTH), XIV Congrès SOFAMEA, Geneva, Switzerland, February 2015.
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Charbonnier C, Chagué S, Ponzoni M, Bernardoni M, Hoffmeyer P, Christofilopoulos P. Risk Assessment of Sexual Activity after Total Hip Arthroplasty (THA), Swiss Med Wkly, Suppl 204, 144:35S, 2014.
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Charbonnier C, Chagué S, Ponzoni M, Bernardoni M, Hoffmeyer P, Christofilopoulos P. Sexual Activity after Total Hip Arthroplasty: A Motion Capture Study, 15th EFORT Congress, London, UK, June 2014.
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Charbonnier C, Chagué S, Ponzoni M, Bernardoni M, Hoffmeyer P, Christofilopoulos P. Sexual Activity after Total Hip Arthroplasty: A Motion Capture Study, J Arthroplasty, 29(3):640–647, 2014.
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