title: A comparison of the use of uncemented hydroxyapatite-coated bipolar and cemented femoral stems in the treatment of femoral neck fractures: a case-control study.
abstract: We performed a case-control study to compare the rates of further surgery, revision and complications, operating time and survival in patients who were treated with either an uncemented hydroxyapatite-coated Corail bipolar femoral stem or a cemented Exeter stem for a displaced intracapsular fracture of the hip. The mean age of the patients in the uncemented group was 82.5 years (53 to 97) and in the cemented group was 82.7 years (51 to 99) We used propensity score matching, adjusting for age, gender and the presence or absence of dementia and comorbidities, to produce a matched cohort receiving an Exeter stem (n = 69) with which to compare the outcome of patients receiving a Corail stem (n = 69). The Corail had a significantly lower all-cause rate of further surgery (p = 0.016; odds ratio (OR) 0.18, 95% CI 0.04 to 0.84) and number of hips undergoing major further surgery (p = 0.029; OR 0.13, 95% CI 0.01 to 1.09). The mean operating time was significantly less for the Corail group than for the cemented Exeter group (59 min [12 to 136] vs 70 min [40 to 175], p = 0.001). The Corail group also had a lower risk of a peri-prosthetic fracture (p = 0.042; OR 0.19, 95% CI 0.01 to 1.42) . There was no difference in the mortality rate between the groups. There were significantly fewer complications in the uncemented group, suggesting that the use of this stem would result in a decreased rate of morbidity in these frail patients. Whether this relates to an improved functional outcome remains unknown.
authors.affiliation: Department of Orthopaedic Surgery, Royal Infirmary of Edinburgh, Old Dalkeith Road, Edinburgh, EH16 4SA, UK.
authors.forename: K R
authors.initials: KR
authors.lastname: Bell
authors.forename: N D
authors.initials: ND
authors.lastname: Clement
authors.forename: P J
authors.initials: PJ
authors.lastname: Jenkins
authors.forename: J F
authors.initials: JF
authors.lastname: Keating
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D019644:Arthroplasty, Replacement, Hip; D016022:Case-Control Studies; D002484:Cementation; D020099:Coated Materials, Biocompatible; D015897:Comorbidity; D017886:Durapatite; D005265:Femoral Neck Fractures / Q000601:surgery*; D062785:Hemiarthroplasty / Q000379:methods*; D006622:Hip Prosthesis; D006801:Humans; D008875:Middle Aged; D061646:Operative Time; D011183:Postoperative Complications; D057216:Propensity Score; D011446:Prospective Studies; D011474:Prosthesis Design; D012086:Reoperation; D015996:Survival Rate; D016896:Treatment Outcome
chemical_list: D020099:Coated Materials, Biocompatible; D017886:Durapatite
keywords: Cemented; Fracture; Hemiarthroplasty; Hip; Proximal Femur; Uncemented