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Peer-reviewedCC BY 4.0Royal Society Open Science

Determination of inter-individual differences in humeral head centre translations in subjects with healthy shoulders

  • Eva C. Herbst1,2
  • Heath B. Henninger3
  • Flavia Stettler1
  • Maximilian Modelhart2,4
  • Matteo Tanadini5
  • Stephen J. Ferguson1
  • Philipp Moroder2
5 affiliations
  1. 1Laboratory for Orthopaedic Technology, Institute for Biomechanics, Department of Health Sciences and Technology, ETH Zurich 1 , Zürich, Switzerland
  2. 2Schulthess Klinik 2 , Zürich, Switzerland
  3. 3Department of Orthopaedics, The University of Utah 3 , Salt Lake City, UT, USA
  4. 4Paracelsus Medical University 4 , Salzburg, Austria
  5. 5Zurich Data Scientists GmbH 5 , Zürich, Switzerland
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Abstract

The aims of this study were to (i) quantify glenohumeral (GH) joint translations in healthy shoulders, (ii) assess subject-specific variability in GH translations, (iii) determine whether bony joint geometry (glenoid height, width, retroversion, inclination, GH asphericity and congruence), upright scapular posture, motion and handheld load affect translation magnitude and (iv) analyse the position of the humeral head centre (HHC) starting point relative to different glenoid centre definitions. We measured translations of the HHC relative to the glenoid axes in 19 healthy subjects during five arm motions. Mean 3D, superoinferior (SI), anteroposterior (AP), and mediolateral (ML) translation magnitudes were 14.7% of glenoid height, 9.5% of glenoid height, 15.4% of glenoid width, and 7.4% of glenoid height, respectively. Glenoid height affected 3D and SI translation magnitude inclination angle, glenoid asphericity and scapular tilt affected 3D and AP translation magnitudes and motion affected 3D, AP and SI translation magnitudes (p≤ 0.05, but effect sizes are small and large confidence intervals warrant further experiments). The starting point of the HHC was closer to the glenoid geometric mean than to the inferior glenoid circle center, which may be useful clinically when attempting to restore healthy HHC positioning.

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Cite

BibTeXRIS
BibTeX
@article{herbst2026determination,
  title = {{Determination of inter-individual differences in humeral head centre translations in subjects with healthy shoulders}},
  author = {Eva C. Herbst and Heath B. Henninger and Flavia Stettler and Maximilian Modelhart and Matteo Tanadini and Stephen J. Ferguson and Philipp Moroder},
  journal = {Royal Society Open Science},
  year = {2026},
  month = oct,
  doi = {10.1098/rsos.252309},
  url = {https://royalsocietypublishing.org/rsos/article/13/10/252309/483519/Determination-of-inter-individual-differences-in},
  note = {CC BY 4.0},
}
RIS
TY  - JOUR
TI  - Determination of inter-individual differences in humeral head centre translations in subjects with healthy shoulders
AU  - Eva C. Herbst
AU  - Heath B. Henninger
AU  - Flavia Stettler
AU  - Maximilian Modelhart
AU  - Matteo Tanadini
AU  - Stephen J. Ferguson
AU  - Philipp Moroder
PY  - 2026
DA  - 2026/10/07
JO  - Royal Society Open Science
DO  - 10.1098/rsos.252309
UR  - https://royalsocietypublishing.org/rsos/article/13/10/252309/483519/Determination-of-inter-individual-differences-in
AB  - The aims of this study were to (i) quantify glenohumeral (GH) joint translations in healthy shoulders, (ii) assess subject-specific variability in GH translations, (iii) determine whether bony joint geometry (glenoid height, width, retroversion, inclination, GH asphericity and congruence), upright scapular posture, motion and handheld load affect translation magnitude and (iv) analyse the position of the humeral head centre (HHC) starting point relative to different glenoid centre definitions. We measured translations of the HHC relative to the glenoid axes in 19 healthy subjects during five arm motions. Mean 3D, superoinferior (SI), anteroposterior (AP), and mediolateral (ML) translation magnitudes were 14.7% of glenoid height, 9.5% of glenoid height, 15.4% of glenoid width, and 7.4% of glenoid height, respectively. Glenoid height affected 3D and SI translation magnitude inclination angle, glenoid asphericity and scapular tilt affected 3D and AP translation magnitudes and motion affected 3D, AP and SI translation magnitudes (p≤ 0.05, but effect sizes are small and large confidence intervals warrant further experiments). The starting point of the HHC was closer to the glenoid geometric mean than to the inferior glenoid circle center, which may be useful clinically when attempting to restore healthy HHC positioning.
SN  - 2054-5703
ER  -