Correlation of canal flare index of the proximal femur with bone mineral density of the femoral neck / 中国组织工程研究

ABSTRACT

BACKGROUND:The prevalence of osteoporosis is high in the patients undergoing total hip arthroplasty. Osteoporosis is associated with the survival of prostheses. Both canal flare index and bone mineral density are aged-related. OBJECTIVE:To study the cxorrelation between canal flare index of the proximal femur and bone mineral density of femoral neck, and to pay more attention to osteoporosis. METHODS:A retrospective study of the correlation between canal flare index of the proximal femur on pelvic radiograph and bone mineral density of femoral neck was made in 57 patients undergoing total hip arthroplasty. RESULTS AND CONCLUSION:The canal flare index were ranged 1.8-4.8 (3.1±0.7) in 57 patients. There were 23 patients in canal flare index4.7 (funnel-type medul ary cavity). The age had an impact on the type of medul ary cavity. The prevalence of chimney-type medul ary cavity were significantly higher in>60 years old group than≤60 years old group, and bone mineral density of femoral neck in the group of canal flare index≥3 was significantly higher than the group of canal flare index60 years old group [(0.751±0.235) g/cm2, (0.590±0.092) g/cm2, P=0.000]. As bone mineral density reduced, canal flare index was also decreased. Experimental findings indicate that, the bone mineral density of femoral neck is significantly correlated with canal flare index.