5 patients with posterior rim acetabular fractures were treated with absorbable screws. Open reduction and internal fixation were performed on these patients due to the instability of the fracture following closed reduction. All 5 patients healed without complications and showed good results, indicating that the absorbable screws provided sufficient stability for the fixation of this type of fracture. In addition, the absorbable implants did not require removal and produced no artifacts in postoperative CT and 3-DCT images, permitting excellent analysis of the fracture aligment and union. These results indicate that the absorbable screws may be a viable alternative to metalic implants for the treatment of unstable posterior rim acetabular fractures.