Radiological evaluation of acromial characteristic using supraspinatus outlet view in shoulder impingement syndrome

Abstract

Purpose of this study was to find the association between shoulder impingement syndrome (SIS) and morphological characteristics of acromion  (acromial  tilt  angle,  typeof  acromion,  subacromial osteophyte).Supraspinatus  outlet  view  was  performed  using  fluoroscopy. There  were  40  SIS  patients  and  40  individuals  with  no  shoulder  pain  examined  and  measured  for  their  acromial  tilt  angle,  typeof acromion  (according  to  Bigliani’s  classification  and  Park’s  criteria)  and  forthe  presence  of  subacromial  osteophyte.  Average acromial tilt angle was 34.1° (SD 7.6) for SIS group and 32.1° (SD 7.7) for control group. Type II acromion was found more frequent in both groups (85% and 95%). The association between SIS and acromial tiltangle or between SIS and type of acromion were statisticallyinsignificant (p=0.241 and p=0.221). Subacromial osteophyte was found in 52.5% of SIS group compare to 12.5% among the control group,  and  the  association  with  SIS  was  statistically  significant  (p=0.0003).Subacromial  osteophyte  was  found  to  have  significant association with SIS. Such association was not found in acromial tilt angle and type of acromion. (Med J Indones 2007; 16:176-80)