title: Outcome of porous tantalum acetabular components for Paprosky type 3 and 4 acetabular defects.
abstract: Porous tantalum acetabular implants provide a potential solution for dealing with significant acetabular bone loss. This study reviews 24 acetabular revisions using tantalum implants for Paprosky type 3 and 4 defects. The mean Harris Hip Score improved from 35 ± 19 (range, 4-71) to 88 ± 14 (range, 41-100), p < 0.0001. Postoperative radiographs showed radiolucent lines in 14 hips with a mean width of 1.3 ± 1.0 mm (range, 0.27-4.37 mm). No gaps enlarged and 71% of them disappeared at a mean of 13 ± 10 months (range, 3-29 months). At a mean follow-up of 37 ± 14 months (range, 24-66 months), 22 reconstructions showed radiograpic evidence of osseointegration (92%). The two failures were secondary to septic loosening. When dealing with severe acetabular bone loss, porous tantalum acetabular components show promising short-term results.
authors.affiliation: Department of Orthopaedic Surgery, Stanford University Medical Center, Stanford, California.
authors.forename: Eldridge D
authors.initials: ED
authors.lastname: Batuyong
authors.affiliation: Department of Orthopaedic Surgery, Stanford University Medical Center, Stanford, California.
authors.forename: Hugh S
authors.initials: HS
authors.lastname: Brock
authors.affiliation: Department of Orthopaedic Surgery, Stanford University Medical Center, Stanford, California.
authors.forename: Nikhil
authors.initials: N
authors.lastname: Thiruvengadam
authors.affiliation: Department of Orthopaedic Surgery, Stanford University Medical Center, Stanford, California.
authors.forename: William J
authors.initials: WJ
authors.lastname: Maloney
authors.affiliation: Department of Orthopaedic Surgery, Stanford University Medical Center, Stanford, California.
authors.forename: Stuart B
authors.initials: SB
authors.lastname: Goodman
authors.affiliation: Department of Orthopaedic Surgery, Stanford University Medical Center, Stanford, California.
authors.forename: James I
authors.initials: JI
authors.lastname: Huddleston
mesh_terms: D000077:Acetabulum / Q000000981:diagnostic imaging / Q000503:physiopathology* / Q000601:surgery; D019644:Arthroplasty, Replacement, Hip / Q000009:adverse effects; D001672:Biocompatible Materials; D006621:Hip Joint / Q000000981:diagnostic imaging / Q000601:surgery; D006622:Hip Prosthesis; D006801:Humans; D016348:Osseointegration; D010024:Osteoporosis / Q000209:etiology / Q000503:physiopathology / Q000601:surgery*; D016062:Porosity; D011474:Prosthesis Design; D011475:Prosthesis Failure; D011859:Radiography; D012086:Reoperation; D012189:Retrospective Studies; D013635:Tantalum
chemical_list: D001672:Biocompatible Materials; D013635:Tantalum
keywords: Harris Hip Score; acetabulum; osseointegration; porous tantalum; radiolucent line; revision hip surgery