**2. Materials and Methods**

Our study included 19 patients, including 10 men and 9 women (mean age, 54 [range, 21–89] years) with both-column fractures of the acetabulum. Notably, the causes of the injury were traffic accidents and fall from a height in 13 and 6 patients, respectively. Of the 19 patients, 11 (57.8%) had a central dislocation of the femoral head. The average follow-up period was 30.5 (range, 12–60) months (Table 1). All surgeries were performed by two experienced surgeons (J.-W.K. and C.-W.O.), and the surgical team usually consisted of one surgeon and two assistants, sometimes one surgeon and one assistant.

**Table 1.** Patient's background and summarized results.


M: male, F: female, CDFH: Central dislocation of the femoral head, ONFH: Osteonecrosis of the femoral head, OA: osteoarthritis.
