RT Book, Section
A1 Wenokor, Cornelia
A1 Blacksin, Marcia F.
A2 Tehranzadeh, Jamshid
SR Print(0)
ID 1181068902
T1 Skeletal Trauma: Lower Extremity
T2 Basic Musculoskeletal Imaging, 2e
YR 2021
FD 2021
PB McGraw-Hill Education
PP New York, NY
SN 9781260459975
LK accessmedicine.mhmedical.com/content.aspx?aid=1181068902
RD 2024/04/24
AB The  pelvis  is  formed  by  the  ischium,  the  pubic  bones,  and  ilium,  which  through  the  sacroiliac  joints  (SI  joints)  connect  to  the  sacrum.  This  forms  a  ring  structure.  The  pubic  bones  are  joined  anteriorly  by  the  pubic  symphysis  and  form  the  anterior  ring.  The  posterior  ring  is  formed  by  the  sacrum,  the  SI  joints,  and  iliac  bones.  To  disrupt  this  ring  usually  requires  significant  force,  which  can  occur  in  motor  vehicle  accidents  or  similar  high-energy  trauma.  A  ring  structure  usually  breaks  in  more  than  one  place,  so  it  is  important  to  carefully  examine  the  entire  ring  for  a  second  injury  once  a  fracture  is  encountered.  The  second  injury  does  not  need  to  be  a  fracture;  it  can  be  disruption  of  the  SI  joints  or  pubic  symphysis  (Figure  3-1).