title: Acetabular component positioning in primary THA via an anterior, posterolateral, or posterolateral-navigated surgical technique.
abstract: The purpose of this study was to compare the acetabular component alignment in patients undergoing primary total hip arthroplasty (THA) via 3 surgical techniques: direct anterior using intraoperative fluoroscopy, posterolateral using an external alignment guide (posterolateral conventional), and posterolateral using computer navigation (posterolateral navigated). Two surgeons performed the direct, anterior THAs; 2 surgeons performed the posterolateral-conventional THAs; and 1 surgeon performed the posterolateral-navigated THAs. The most recent 110 THAs performed using each approach were reviewed, and Einsel-Bild-Roentgen analysis software was used to measure the acetabular component abduction and anteversion. One-way analysis of variance showed the anterior cohort to have a more horizontal alignment of the acetabular component (P,.001); 90.9% of the acetabular components in the posterolateral- navigated cohort were within 40°610° and 15°610° for both acetabular abduction and anteversion, respectively, vs 70% in the posterolateral-conventional (P,.001), and 68.2% in the anterior cohort (P,.001). The anterior technique using intraoperative fluoroscopy does not improve acetabular positioning compared with the conventional, posterolateral technique.
authors.forename: Denis
authors.initials: D
authors.lastname: Nam
authors.forename: Peter K
authors.initials: PK
authors.lastname: Sculco
authors.forename: Edwin P
authors.initials: EP
authors.lastname: Su
authors.forename: Michael M
authors.initials: MM
authors.lastname: Alexiades
authors.forename: Mark P
authors.initials: MP
authors.lastname: Figgie
authors.forename: David J
authors.initials: DJ
authors.lastname: Mayman
mesh_terms: D000077:Acetabulum / Q000601:surgery*; D000368:Aged; D019644:Arthroplasty, Replacement, Hip / Q000379:methods*; D005260:Female; D005471:Fluoroscopy; D006622:Hip Prosthesis; D006801:Humans; D008297:Male; D008875:Middle Aged; D011247:Pregnancy; D012189:Retrospective Studies; D025321:Surgery, Computer-Assisted