Hans Gray

Moment arm of the knee-extensor mechanism measured in vivo across a range of daily activities

Hans A Gray, Shanyuanye Guan, Lucas T Thomeer, Marcus G Pandy

Journal article  |  2021  |  JOURNAL OF BIOMECHANICS

We measured the moment arm of the knee-extensor mechanism as ten healthy young individuals performed six functional activities: le..

Six-Degree-of-Freedom Tibiofemoral and Patellofemoral Joint Motion During Activities of Daily Living.

Lucas Thomeer, Shanyuanye Guan, Hans Gray, Anthony Schache, Richard de Steiger, Marcus Pandy

Journal article  |  2021  |  Annals of Biomedical Engineering

The purpose of this study was to measure the three-dimensional movements of the femur, tibia and patella in healthy young people d..

Comparison of posterior-stabilized, cruciate-retaining, and medial-stabilized knee implant motion during gait.

Hans A Gray, Shanyuanye Guan, Tony J Young, Michelle M Dowsey, Peter F Choong, Marcus G Pandy

Journal article  |  2020  |  Journal of Orthopaedic Research

Accurate knowledge of knee joint motion is needed to evaluate the effects of implant design on functional performance and componen..

Biomechanical leg muscle function during stair ambulation in men receiving androgen deprivation therapy.

Ada S Cheung, Hans A Gray, Anthony G Schache, Rudolf Hoermann, Jarrod Bicknell, Daryl Lim Joon, Jeffrey D Zajac, Marcus G Pandy, Mathis Grossmann

Journal article  |  2019  |  Journals of Gerontology - Series A Biological Sciences and Medical Sciences

BACKGROUND: The role of testosterone in maintaining functional performance in older men remains uncertain. METHODS: We conducted a..

Selective Loss of Levator Ani and Leg Muscle Volumes in Men Undergoing Androgen Deprivation Therapy

Ada S Cheung, Christopher Cunningham, Dong-Kyoon Daniel Ko, Vivian Ly, Hans Gray, Rudolf Hoermann, Boyd JG Strauss, Ebrahim Bani Hassan, Gustavo Duque, Peter Ebeling, Marcus G Pandy, Jeffrey D Zajac, Mathis Grossmann

Journal article  |  2019  |  JOURNAL OF CLINICAL ENDOCRINOLOGY & METABOLISM

CONTEXT: Androgen deprivation therapy (ADT) for prostate cancer (PCa) leads to a selective loss of leg muscle function during walk..

SIX-DEGREES-OF-FREEDOM KINEMATICS OF POSTERIOR-STABILIZED, CRUCIATE-RETAINING AND MEDIAL-STABILIZED KNEE IMPLANTS IN OVERGROUND WALKING

Hans Gray, Shanyuanye Guan, Michelle Dowsey, Peter Choong, Marcus Pandy

Conference Proceedings  |  2019

INTRODUCTION The medial-stabilised (MS) knee implant, characterised by a spherical medial condyle on the femoral component and a m..

Three-dimensional motion of the knee-joint complex during normal walking revealed by mobile biplane x-ray imaging

Hans A Gray, Shanyuanye Guan, Lucas T Thomeer, Anthony G Schache, Richard de Steiger, Marcus G Pandy

Journal article  |  2019  |  JOURNAL OF ORTHOPAEDIC RESEARCH

Accurate knowledge of knee kinematics is important for a better understanding of normal joint function and for improving patient o..

Measurement of 3d dynamic joint motion using biplane videoradiography

H Gray, S Guan, P Loan, M Pandy

Book Chapter  |  2018

Accurate measurement of in vivo joint kinematics is important for understanding normal and pathological human motion and for evalu..

In Vivo Six-Degree-of-Freedom Knee-Joint Kinematics in Overground and Treadmill Walking Following Total Knee Arthroplasty

Shanyuanye Guan, Hans A Gray, Anthony G Schache, Julian Feller, Richard de Steiger, Marcus G Pandy

Journal article  |  2017  |  JOURNAL OF ORTHOPAEDIC RESEARCH

No data are available to describe six-degree-of-freedom (6-DOF) knee-joint kinematics for one complete cycle of overground walking..

Accuracy of mobile biplane X-ray imaging in measuring 6-degree -of-freedom patellofemoral kinematics during overground gait

Hans A Gray, Shanyuanye Guan, Marcus G Pandy

Journal article  |  2017  |  JOURNAL OF BIOMECHANICS

The aim of this study was to evaluate the accuracy with which mobile biplane X-ray imaging can be used to measure patellofemoral k..