Does Acromion Morphology Depend on the Extremity or on Gender in the Population?
OBJECTIVE
The aims were to study the acromion parameters in the population and to assess the extremity or sex variation in the acromion morphology.


METHODS
The lateral acromion angle (LAA) and the acromion index (AI) were assessed in a computed tomographic scan database of 250 individuals in the age group of 20 to 49 years. For the analysis of LAA and AI, 286 and 234 shoulders were available, respectively.


RESULTS
The LAA was 73.6 ± 6.6 degrees; 73.7 ± 6.9 and 72.5 ± 6.1 degrees for the right and left shoulder, respectively. The AI was 0.755 ± 0.12; 0.82 ± 0.12 and 0.69 ± 0.12 for the left and the right shoulder, respectively. The AI of the right shoulder was significantly different between the 2 sexes (P = 0.04). The difference in the AI and the LAA of the right and left shoulders was significant (P < 0.0001, P = 0.04).


CONCLUSIONS
The morphology of the acromion differs between the right and the left shoulders as well as between sexes.
From the *Seven Hills Hospital, Mumbai, India; †Department of Traumatology and Sports Injuries, Academic Teaching Hospital of Freiburg University, St Vincentius-Clinic, Karlsruhe; Departments of ‡Shoulder and Elbow Surgery, §Clinical Radiology and Nuclear Medicine, and ∥Orthopedic and Trauma Surgery, University Medical Center Mannheim, Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany; and ¶Department of Orthopedic Surgery, Paracelsus Medical University Salzburg, Salzburg, Austria.
Aditya Sai
AS
Kadavkolan
Lars-Johannes
LJ
Lehmann
Miriam
M
Reichert
Katharina
K
Lattka
Mohamed
M
Moursy
D000174:Acromion / Q000033:anatomy & histology* / Q000000981:diagnostic imaging*; D000328:Adult; D005260:Female; D005858:Germany / Q000453:epidemiology; D006801:Humans; D008297:Male; D008875:Middle Aged; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D017678:Sex Distribution; D012737:Sex Factors; D014057:Tomography, X-Ray Computed / Q000706:statistics & numerical data*