A pelvic discontinuity is due to chronic conditions where acetabular bone stock has been diminished. This can be classified as a Della Valle V fracture.
Further information about Della Valle classification can be found in the publication: Della Valle CJ, Momberger NG, Paprosky WG. Periprosthetic fractures of the acetabulum associated with a total hip arthroplasty. Instr Course Lect. 2003;52:281–290.