Abstract:

BACKGROUND: Whether the knee is a risk factor for hip fracture is controversial.

OBJECTIVE: To investigate the effect and mechanism of knee osteoarthritis in the development of low-energy hip fracture.

METHODS: Totally 116 patients with mild traumatic femoral neck fractures and intertrochanteric fractures admitted from October 2014 to January 2015 were enrolled and retrospectively analyzed. There were 38 males and 78 females. The mean age of onset was (69.2±14.5) years, and all the patients were diagnosed as have simple hip fractures. Anterioposterior and lateral X-ray examination for the hip and knee was performed for each patient. General information, Kellgren-Lawrence grading, scores on Hospital for Special Surgery (HSS), and Western Ontario and McMaster Universities Index of Osteoarthritis were recorded and analyzed.

RESULTS AND CONCLUSION: Among the 116 cases, there were 66 cases of femoral neck fractures, 48 of intertrochanteric fractures and 2 of subtrochanteric femoral fractures. According to the Kellgren-Lawrence grading, there were 0 case of grade 0, 21 of grade I, 51 of grade II, 44 of grade III, and 0 of grade IV. Average Kellgren-Lawrence grading was 2.19±0.72 in fractured side and 1.51±0.52 in non-fractured side, and there was a significant difference between the fractured side and non-fractured side (P < 0.05). Average score of HSS was 78.4±8.09 in fractured side and 80.2±8.1 in non-fractured side, with statistical difference (P < 0.05). These findings indicate that knee osteoarthritis may have some adverse effects in the development of low-energy hip fracture, which can increase the incidence of femoral neck fracture and intertrochanteric fracture.

中国组织工程研究杂志出版内容重点：组织构建；骨细胞；软骨细胞；细胞培养；成纤维细胞；血管内皮细胞；骨质疏松；组织工程

Key words: Knee Joint, Femoral Neck Fractures, Hip