Differences in glenohumeral translations calculated with three methods: Comparison of relative positions and contact point

Abstract Several published articles have reported 3-dimensional glenohumeral kinematics using model-image registration techniques. However, different methods to compute the translations were used in these articles. The purpose of this study was to compare glenohumeral translations calculated with th...

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Bibliographic Details
Published in:Journal of biomechanics 2016-06, Vol.49 (9), p.1944-1947
Main Authors: Matsuki, Keisuke, Kenmoku, Tomonori, Ochiai, Nobuyasu, Sugaya, Hiroyuki, Banks, Scott A
Format: Article
Language:English
Subjects:
Accuracy
Adult
Biomechanical Phenomena
Computation
Contact
Contact point
Elevation
Fluoroscopic imaging
Fluoroscopy
Glenohumeral joint
Humans
Humerus - physiology
Kinematics
Knee
Male
Mathematical models
Methods
Model-image registration techniques
Origins
Physical Medicine and Rehabilitation
Registration
Scapula - physiology
Shoulder
Shoulder - physiology
Shoulder Joint - physiology
Software
Statistical analysis
Studies
Translations
Variance analysis
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Summary:Abstract Several published articles have reported 3-dimensional glenohumeral kinematics using model-image registration techniques. However, different methods to compute the translations were used in these articles. The purpose of this study was to compare glenohumeral translations calculated with three different methods. Fifteen healthy males with a mean age of 31 years (range, 27–36 years old) were enrolled in this study. Fluoroscopic images during scapular plane elevation were recorded at 30 frames per second for the right shoulder in each subject, and CT-derived models of the humerus and the scapula were matched with the silhouette of the bones in the fluoroscopic images using model-image registration techniques. Glenohumeral translations were computed with three methods: relative position of the origins of the humeral and scapular models, contact points of the two models, and relative positions based upon the calculated glenohumeral center of rotation (CoR). In the supero-inferior direction, translations calculated with the three methods were roughly parallel, with the maximum difference of 1.6 mm ( P
ISSN:0021-9290
1873-2380
DOI:10.1016/j.jbiomech.2016.03.042