Analysis of Factors Influencing Postoperative Femoral Head Collapse in Patients With Ficat I, II, and III Stages of Aseptic Necrosis of the Femoral Head.

ABSTRACT

OBJECTIVE: To investigate the factors influencing postoperative femoral head collapse (FHC) in patients with Ficat I, II, and III stages of aseptic necrosis of the femoral head (ANFH). METHODS: Retrospective analysis of 178 patients with ANFH admitted to our hospital from October 2018 to October 2021 was studied, and patients were categorized into the FHC group and no FHC group according to whether FHC occurred after surgery. The influencing factors causing postoperative FHC were analyzed by univariate and multifactor logistic regression. RESULTS: In the collapsed group, there were statistically significant differences in etiology, extent of necrosis, mechanism of injury, preoperative waiting time, Japanese Femoral Necrosis Research Society staging, distance from the tip of the tantalum rod to the center of necrosis, and Harris score after treatment ( P < 0.05). The etiology, extent of necrosis, mechanism of injury, preoperative waiting time, Japanese Femoral Osteonecrosis Research Society classification, distance between the tantalum rod tip and the center of necrosis, and Harris score after treatment were set as independent variables, and postoperative FHC in patients with Ficat I, II, and III stages of ANFH was used as the dependent variable in the univariate logistic regression analysis. DISCUSSION: Hormonal osteonecrosis of the femur, extent of necrosis, type C1 and type C2 in the Japanese Society for the Study of Femoral Osteonecrosis staging, and distance of the tip of the tantalum rod from the center of necrosis are risk factors for postoperative FHC in patients with Ficat I, II, and III stages of ANFH.