title: Failure of intertrochanteric fracture fixation with a dynamic hip screw in relation to pre-operative fracture stability and osteoporosis.
abstract: We have reviewed 178 intertrochanteric fractures treated by dynamic hip screw (DHS) fixation between March 1995 and December 1999 and followed for a minimum of 1 year. We used Singh's classification of the trabecular bone structure in the proximal femur as a measure of osteoporosis and also classified the fractures according to three different systems (Boyd-Griffin, Evans, AO). The postoperative radiographs were examined for loss of reduction, i.e. varus angulation >100, perforation of the femoral head, more than 20-mm extrusion of a lag screw or metal failure. We found 49 cases which showed radiographic failures. Two were stable fractures and 47 unstable fractures (Evans' classification). Unstable fractures with osteoporosis had a failure rate of more than 50%. In such cases DHS should not be the first choice for treatment.
authors.affiliation: Department of Orthopaedic Surgery, Daejon St. Mary's Hospital, Catholic University of Korea. weonkim@ppp.kornet.net
authors.forename: W Y
authors.initials: WY
authors.lastname: Kim
authors.forename: C H
authors.initials: CH
authors.lastname: Han
authors.forename: J I
authors.initials: JI
authors.lastname: Park
authors.forename: J Y
authors.initials: JY
authors.lastname: Kim
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D001863:Bone Screws; D005260:Female; D005593:Fracture Fixation, Internal; D006620:Hip Fractures / Q000601:surgery*; D006801:Humans; D008297:Male; D008875:Middle Aged; D010024:Osteoporosis / Q000150:complications; D012189:Retrospective Studies; D017211:Treatment Failure