The risk factors of femoral head necrosis after treatment with femoral neck fractures with locking plate and cannulated screw / 重庆医学

ABSTRACT

Objective To investigate the risk factors of influencing femoral head necrosis (ONFH) after treatment with internal fixation of femoral head fracture .Methods 126 patients with femoral neck fracture admitted from 2010 to 2012 in the hospital ,and treated by locking plate and cannulated screw ,were divided into the ONFH group and the control group .Patient condition ,fracture situation ,fracture treatment .etc were compared between the two groups .Results Among 126 patients with femoral neck fracture treated by locking plate and cannulated screw ,17 cases in the ONFH group were founded ,the prevalence rate of ONFH was 13 .49% (17/126) .Univariate analysis showed that ,age ,garden type ,quality of reduction ,injury-to-surgery interval ,screw place-ment ,whether to remove the internal fixation were influencing factors ,the difference was statistically significant (P<0 .05) .Gener-alized linear model analysis showed that there was interaction between age and internal fixation ,gender and injury-to-surgery (F=5 .768 ,P=0 .018 ;F=5 .542 ,P=0 .020) .Multiple Logistic regression analysis showed that ,age ,quality of reduction ,injury-to-sur-gery interval ,gender and injury-to-surgery were risk factors of ONFH ,OR were 0 .215 ,0 .293 ,3 .162 ,3 .054 ,respectively .Conclu-sion The elderly patient with femoral neck fracture treated by locking plate and cannulated screw early with excellent anatomic re-duction ,has less incidence of ONFH .