1: J Bone Joint Surg Br. 2005 Apr;87(4):463-4.
Femoral neck fractures following Birmingham hip resurfacing:
a national review of 50 cases.
Shimmin AJ, Back D.
Melbourne Orthopaedic Group, 33 The Avenue, Windsor,
Victoria 3181, Australia. email@example.com
Between April 1999 and April 2004, 3497 Birmingham hips were
inserted by 89 surgeons. Fracture of the neck of the femur
occurred in 50 patients, an incidence of 1.46%. Complete
data were available for 45 patients in whom the incidence
was 1.91% for women and 0.98% for men. The relative risk of
fracture for women vs men was 1.94961 and this was
statistically significant (p < 0.01).The mean time to
fracture was 15.4 weeks. In women the fractures occurred at
a mean of 18.5 weeks and were more likely to have been
preceded by a prodromal phase of pain and limping. In men
the mean time to fracture was 13.5 weeks. Significant varus
placement of the femoral component, intra-operative notching
of the femoral neck and technical problems were common
factors in 85% of cases.
PMID: 15795193 [PubMed – indexed for MEDLINE]
Jan 9 2006