title: Clinical results of a modular neck hip system: hitting the "bull's-eye" more accurately.
abstract: In this article, we present 2-year clinical results of a modular neck tapered hip stem, based on 634 patients from a 2-center study. Nearly half of the patients in this series required use of a head center location offered by the modular neck stem but not available in a nonmodular stem with an identical body. The modular neck enabled femoral-first preparation, which facilitates establishing the desired total version of the reconstruction. No fractures of a stem or modular neck occurred, and there were no dissociations of the head-neck junction. There were no complications or revisions related to the femoral implant. Optimal leg length, femoral offset, and total version are goals in hip arthroplasty. Neck modularity improves the ability to re-create the head center to achieve these goals and to hit the "bull's-eye" in total hip arthroplasty.
authors.affiliation: Oregon Health and Science University, Portland, Oregon, USA. pduwelius@aol.com
authors.forename: Paul J
authors.initials: PJ
authors.lastname: Duwelius
authors.forename: Mark A
authors.initials: MA
authors.lastname: Hartzband
authors.forename: Robert
authors.initials: R
authors.lastname: Burkhart
authors.forename: Clay
authors.initials: C
authors.lastname: Carnahan
authors.forename: Scott
authors.initials: S
authors.lastname: Blair
authors.forename: YingXing
authors.initials: Y
authors.lastname: Wu
authors.forename: Gary L
authors.initials: GL
authors.lastname: Grunkemeier
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D019644:Arthroplasty, Replacement, Hip / Q000295:instrumentation* / Q000379:methods; D005260:Female; D006621:Hip Joint / Q000503:physiopathology / Q000601:surgery*; D006622:Hip Prosthesis; D006801:Humans; D007592:Joint Diseases / Q000503:physiopathology / Q000601:surgery; D007593:Joint Instability / Q000517:prevention & control; D008297:Male; D008875:Middle Aged; D011183:Postoperative Complications / Q000517:prevention & control*; D011474:Prosthesis Design; D011475:Prosthesis Failure; D016059:Range of Motion, Articular; D012086:Reoperation; D015203:Reproducibility of Results; D055815:Young Adult