Biomechanics Perspectives after surgery and Gait analysis in children

Biomechanics Perspectives after surgery and Gait analysis in children

Today, 6.00pm Monday 15 March 2021

Two talks in the specialty of Biomechanics in Medicine by A/Prof David Ackland University of Melbourne & Dr Elyse Passmore Royal Children’s.

An on-line event by SMBEVic. Register for your Zoom Link here.

Muscle and joint function after anatomic and reverse total shoulder arthroplasty: Biomechanics perspectives

Presenter: A/Prof David Ackland University of Melbourne

Anatomic total joint replacement arthroplasty is the established treatment for end-stage osteoarthritis of the glenohumeral joint; however, fixation and longevity of the glenoid-side components is a challenge, and rotator cuff tearing post-operatively remains a common but poorly understood complication affecting joint stability. Reverse total shoulder arthroplasty, which represents one-third of all shoulder arthroplasty procedures performed in the U.S, is known to improve mobility and stability in rotator cuff deficient shoulders, yet the biomechanical factors that underpin post-operative joint stability are not well understood. Three-dimensional musculoskeletal modelling, finite element modelling and cadaveric experimentation were combined to evaluate muscle and joint function in the native shoulder and the shoulder after anatomic and reverse total shoulder arthroplasty. The results provide new evidence to explain the biomechanical performance of metal-back glenoids, modular implants, and post-operative complications including rotator cuff tearing and joint instability. Mobility and stability of the reverse shoulder is strongly dependent on muscle moment arms, lines of action, muscle forces, joint forces and the resulting implant-bone stresses. The findings of this research may be useful in patient selection, surgical planning and prescription of targeted rehabilitation following anatomical and reverse total shoulder arthroplasty.  

Clinical use of motion analysis for children with cerebral palsy

Presenter: Dr Elyse Passmore Royal Children’s Hospital Murdoch Children’s Research Institute

Cerebral palsy is the most common cause of physical disability affecting children in developed countries. Currently there is no form of cure or prevention. Cerebral palsy is the result of a lesion in the motor cortex of the brain during the fetal or early post-natal period. This affects a person’s ability to coordinate movement, balance and posture. The severity of the condition can range from those that can walk independently to those that are wheelchair bound.

Motion analysis plays a key role in the diagnosis, intervention planning and evaluation for children with cerebral palsy. This presentation will highlight work at the Royal Children’s Hospital and Murdoch Children’s Research Institute. This includes early diagnosis through use of automated video-based motion tracking from smart-phone videos of infants at home to the use of 3D marker-based optoelectrical systems for analysis of walking to plan and evaluate complex bone and muscle surgeries.


A/Prof Ackland is the Deputy Director of the ARC Training Centre for Medical Implant Technologies, and an ARC Future Fellow.  

Dr Elyse Passmore is the Head Biomedical Engineer of the Gait Analysis Laboratory at The Royal Children’s Hospital and a Research Fellow in the Developmental Imaging Group at the Murdoch Children’s Research Institute.