title: Avascular necrosis in acute and acute-on-chronic slipped capital femoral epiphysis.
abstract: This study reviews the factors affecting the development of avascular necrosis (AVN) after slipped capital femoral epiphysis. Seventy-three patients (n=73) with ninety-two (n=92) hips were included in the study. Out of these 92, 16 were acute, 43 acute-on-chronic, 29 chronic, and four were preslips. Postoperative radiographs showed a reduction in 18 (19.5%) slips. The mean preoperative slip angle was 32 degrees (range 9-76) compared with the postoperative slip angle of 29.9 degrees (range 10-75 degrees ) (P=0.004). Four patients developed AVN. Our results showed that intraoperative reduction of the slip (P<0.001) was significantly related to the development of AVN and was also associated with poor functional outcome.
authors.affiliation: Chesterfield and North Derbyshire Royal Hospital, Chesterfield, Derbyshire, UK. aamnis@aol.com
authors.forename: Aamer
authors.initials: A
authors.lastname: Nisar
authors.forename: Amir
authors.initials: A
authors.lastname: Salama
authors.forename: Jennifer V
authors.initials: JV
authors.lastname: Freeman
authors.forename: Anthony G
authors.initials: AG
authors.lastname: Davies
mesh_terms: D000208:Acute Disease; D000293:Adolescent; D002648:Child; D002908:Chronic Disease; D004838:Epiphyses / Q000473:pathology* / Q000601:surgery; D004839:Epiphyses, Slipped / Q000150:complications* / Q000000981:diagnostic imaging / Q000601:surgery; D005260:Female; D005270:Femur Head / Q000473:pathology* / Q000601:surgery; D005271:Femur Head Necrosis / Q000000981:diagnostic imaging / Q000209:etiology* / Q000601:surgery; D006801:Humans; D008297:Male; D011183:Postoperative Complications; D011859:Radiography; D020127:Recovery of Function; D012307:Risk Factors; D016896:Treatment Outcome