BACKGROUND: The attachments of muscles and the position of the humeral head are important for a good functional outcome of shoulder hemiarthroplasties after displaced fractures of the proximal humerus. Deviations in the attachments and changes in their spatial position with respect to the humeral head during surgical reconstruction change the biomechanics and reduce the range of motion of the should joint postoperatively. METHODS AND RESULTS: We used 198 humerus preparations and using 3-dimensional analysis measured the angular relationships between the humeral head axis and medial margin of the greater tuberosity (11.9 degrees +/- 9.1 degrees ), lateral margin of the lesser tuberosity (48.0 degrees +/- 7.8 degrees ), and the crest of the greater tuberosity (27.1 degrees +/- 9.6 degrees ). CONCLUSION: This study provides average values of the positions of the greater and lesser tuberosities with respect to the humeral head axis. We show that the greater and lesser tuberosities are more reliable than the transepicondylar line for reconstruction of humeral head retroversion. LEVEL OF EVIDENCE: Basic Science.
- MeSH
- analýza rozptylu MeSH
- artroplastiky kloubů metody MeSH
- biomechanika MeSH
- fraktury proximálního humeru radiografie chirurgie MeSH
- humerus anatomie a histologie chirurgie MeSH
- kosterní svaly anatomie a histologie chirurgie MeSH
- lidé MeSH
- magnetická rezonanční tomografie MeSH
- modely anatomické MeSH
- počítačová rentgenová tomografie MeSH
- počítačové zpracování obrazu MeSH
- pravděpodobnost MeSH
- protetické vybavení MeSH
- protézy - design MeSH
- rotátorová manžeta anatomie a histologie radiografie MeSH
- zobrazování trojrozměrné MeSH
- Check Tag
- lidé MeSH
- Publikační typ
- časopisecké články MeSH
