Evaluation of the Superior Pubic Ramus and Supra Acetabular Corridors Using Statistical Shape Modelling.

The incidence of osteoporotic pelvic fractures is increasing. The broken anterior pelvic ring is preferentially fixed with long intramedullary screws, which require a good understanding of the patient-specific anatomy to prevent joint perforation. The aim of this study was to assess the variability of the superior pubic ramus and the supra acetabular corridors’ length and width using statistical shape modelling. A male and female statistical shape model was made based on 59 forensic CT scans. For the superior pubic ramus and the supra acetabular corridor the longest and widest completely fitting cylinder was created for the first 5 principal components (PC) of both models, male and female pelvises separately. A total of 59 pelvises were included in this study of which 36 male and 23 female. The first 5 principal components explained 75