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Measuring 3D In-vivo Shoulder Kinematics using Biplanar Videoradiography
Published on: March 12, 2021
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Stress Distribution Patterns Across the Shoulder Joint in Gymnasts: A Computed Tomography Osteoabsorptiometry Study
Daisuke Momma1, Wataru Iwamoto2, Kaori Endo3
1Center for Sports Medicine, Hokkaido University Hospital, Sapporo, Japan.
Orthopaedic Journal of Sports Medicine
|November 27, 2020
Summary
Male gymnasts exhibit altered subchondral bone density patterns in their shoulder joints due to repetitive stress. This study used computed tomography osteoabsorptiometry (CTOAM) to reveal concentrated stress on the superior glenohumeral joint articular surfaces.
Area of Science:
- Biomechanics
- Orthopedics
- Sports Medicine
Background:
- Subchondral bone density distribution reflects joint surface stress under load.
- Assessing this pattern in gymnasts' shoulders reveals biomechanical adaptations to long-term loading.
Purpose of the Study:
- To evaluate subchondral bone density distribution in male collegiate gymnasts' shoulders.
- To determine the impact of gymnastic activities on shoulder articular surfaces using computed tomography osteoabsorptiometry (CTOAM).
Main Methods:
- A descriptive laboratory study involving 12 male gymnasts and 10 controls.
- CT image data analyzed using CTOAM to assess subchondral bone density distribution.
- Quantitative analysis of high-density areas on articular surfaces.
Main Results:
- Significant differences in stress distribution patterns were observed between gymnasts and controls.
- Gymnasts showed increased bone density, particularly on the posterosuperior humeral head and anterosuperior/posterosuperior glenoid.
- Mean bone density was significantly higher in gymnasts (P < .0001).
Conclusions:
- Gymnastic activities alter shoulder joint stress distribution, concentrating it on the superior glenohumeral joint.
- Findings support the role of mechanical conditions in developing gymnastics-specific shoulder disorders.
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