scholarly journals The weighted optimal common shape technique improves identification of the hip joint center of rotation in vivo

2011 ◽  
Vol 29 (10) ◽  
pp. 1470-1475 ◽  
Author(s):  
Markus O. Heller ◽  
Stefan Kratzenstein ◽  
Rainald M. Ehrig ◽  
Georgi Wassilew ◽  
Georg N. Duda ◽  
...  
Keyword(s):  
Hip Joint ◽  
Center Of Rotation ◽  
Joint Center ◽  
Hip Joint Center ◽  
Common Shape

Evaluation of Anatomical and Functional Hip Joint Center Methods: The Effects of Activity Type, Gender, and Proximal Reference Segment

2015 ◽  
Vol 138 (1) ◽  
Author(s):  
C. A. McGibbon ◽  
J. Fowler ◽  
S. Chase ◽  
K. Steeves ◽  
J. Landry ◽  
...  
Keyword(s):  
Hip Joint ◽  
Range Of Movement ◽  
Functional Methods ◽  
Reference Segment ◽  
Movement Type ◽  
And Gender ◽  
Joint Center ◽  
Chair Rise ◽  
Hip Joint Center

Accurate hip joint center (HJC) location is critical when studying hip joint biomechanics. The HJC is often determined from anatomical methods, but functional methods are becoming increasingly popular. Several studies have examined these methods using simulations and in vivo gait data, but none has studied high-range of motion activities, such a chair rise, nor has HJC prediction been compared between males and females. Furthermore, anterior superior iliac spine (ASIS) marker visibility during chair rise can be problematic, requiring a sacral cluster as an alternative proximal segment; but functional HJC has not been explored using this approach. For this study, the quality of HJC measurement was based on the joint gap error (JGE), which is the difference in global HJC between proximal and distal reference segments. The aims of the present study were to: (1) determine if JGE varies between pelvic and sacral referenced HJC for functional and anatomical methods, (2) investigate which functional calibration motion results in the lowest JGE and if the JGE varies depending on movement type (gait versus chair rise) and gender, and (3) assess whether the functional HJC calibration results in lower JGE than commonly used anatomical approaches and if it varies with movement type and gender. Data were collected on 39 healthy adults (19 males and 20 females) aged 14–50 yr old. Participants performed four hip “calibration” tests (arc, cross, star, and star-arc), as well as gait and chair rise (activities of daily living (ADL)). Two common anatomical methods were used to estimate HJC and were compared to HJC computed using a published functional method with the calibration motions above, when using pelvis or sacral cluster as the proximal reference. For ADL trials, functional methods resulted in lower JGE (12–19 mm) compared to anatomical methods (13–34 mm). It was also found that women had significantly higher JGE compared to men and JGE was significantly higher for chair rise compared to gait, across all methods. JGE for sacrum referenced HJC was consistently higher than for the pelvis, but only by 2.5 mm. The results indicate that dynamic hip range of movement and gender are significant factors in HJC quality. The findings also suggest that a rigid sacral cluster for HJC estimation is an acceptable alternative for relying solely on traditional pelvis markers.

scholarly journals Sensitivity of hip tissues contact evaluation to the methods used for estimating the hip joint center of rotation

2012 ◽  
Vol 50 (6) ◽  
pp. 595-604 ◽  
Author(s):  
Ehsan Arbabi ◽  
Jerome Schmid ◽  
Ronan Boulic ◽  
Daniel Thalmann ◽  
Nadia Magnenat-Thalmann
Keyword(s):  
Hip Joint ◽  
Center Of Rotation ◽  
Joint Center ◽  
Hip Joint Center

scholarly journals In-vivo quantification of dynamic hip joint center errors and soft tissue artifact

2016 ◽  
Vol 50 ◽  
pp. 246-251 ◽  
Author(s):  
Niccolo M. Fiorentino ◽  
Penny R. Atkins ◽  
Michael J. Kutschke ◽  
K. Bo Foreman ◽  
Andrew E. Anderson
Keyword(s):  
Soft Tissue ◽  
Hip Joint ◽  
Joint Center ◽  
Soft Tissue Artifact ◽  
Hip Joint Center

Assessment of the functional method of hip joint center location subject to reduced range of hip motion

2004 ◽  
Vol 37 (3) ◽  
pp. 349-356 ◽  
Author(s):  
Stephen J. Piazza ◽  
Ahmet Erdemir ◽  
Noriaki Okita ◽  
Peter R. Cavanagh
Keyword(s):  
Hip Joint ◽  
Functional Method ◽  
Center Location ◽  
Hip Motion ◽  
Joint Center ◽  
Hip Joint Center

Accuracy and Feasibility of Dual Fluoroscopy and Model-Based Tracking to Quantify In Vivo Hip Kinematics During Clinical Exams

2013 ◽  
Author(s):  
Ashley L. Kapron ◽  
Stephen K. Aoki ◽  
Christopher L. Peters ◽  
Michael J. Bey ◽  
Roger Zauel ◽  
...  
Keyword(s):  
Range Of Motion ◽  
Motion Artifact ◽  
Hip Impingement ◽  
Skin Marker ◽  
Hip Kinematics ◽  
Joint Center ◽  
Bony Morphology ◽  
Hip Joint Center ◽  
Fixed Center

Chondrolabral damage in hips with femoroacetabular impingement (FAI) may result from motion conflict due to abnormal bony morphology. Clinical range of motion and skin-marker motion analysis studies indicate that kinematics are altered in FAI hips, but assessments are limited due to subjective goniometer alignment, skin motion artifact, and imprecise estimations of the hip joint center. Computer simulations of collision between the femur and pelvis suggest that FAI reduces range of motion, but assume a fixed center of rotation and neglect bulk soft tissue restraints. Thus, hip impingement has not been accurately quantified in vivo.

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