[Cadaveric study of the anatomical relationship between the greater tuberosity and prosthetic fin in humeral head replacement].
OBJECTIVE
To investigate the relationship of the greater tuberosity and the lateral fin of the prosthesis by using cadaveric research.


METHODS
Nine pairs of fresh-frozen upper extremity specimens (n = 18) were collected. Two-part anatomical neck fracture models were created by osteotomy along the anatomical neck. A standardized humeral head replacement procedure was carried out. The prosthesis was implanted in 20 degrees and 40 degrees of retroversion respectively, and the distance between the bicipital groove and lateral fin of the prosthesis was measured.


RESULTS
The lateral fins of prostheses in all specimens were located behind the bicipital groove. The average distances were 7.3 mm in 20 degrees retroversion and 4.0 mm in 40 degrees retroversion.


CONCLUSIONS
It is better to fix the greater tuberosity over the lateral fin during humeral head replacement.
Zhu
Yi-ming
YM
Sports & Shoulder Service, Beijing Jishuitan Hospital, Beijing 100035, China.
Jiang
Chun-yan
CY
Wang
Man-yi
MY
D019643:Arthroplasty, Replacement / Q000379:methods*; D006801:Humans; D006811:Humerus / Q000033:anatomy & histology* / Q000601:surgery; D012784:Shoulder Fractures / Q000601:surgery*; D012785:Shoulder Joint / Q000033:anatomy & histology* / Q000601:surgery