title: Uncemented Porous Tantalum Acetabular Components: Early Follow-Up and Failures in 599 Revision Total Hip Arthroplasties.
abstract: BACKGROUND
  The purpose of this study was to determine the early outcomes of 599 cases of revision THA performed using a porous tantalum cup.
  
  
  METHODS
  Clinical and radiographic data was sought in all patients at a minimum two years follow-up, after acetabular revision performed with a porous tantalum cup.
  
  
  RESULTS
  Of the 599 cases identified, there were 51 re-operations in 47 patients (7.8 percent). Cup removal was required in 14 of these cases (2.3 percent). The most common cause for cup removal was a septic joint (12). No cups were revised for aseptic loosening during the study period. There was one case of early cup migration. There were 17 incomplete lucencies not initially seen on post-operative films, but identified later, all were non-progressive on subsequent x-rays.
  
  
  CONCLUSIONS
  Early results of porous tantalum acetabular components in the revision setting demonstrate good initial stability and low re-operation rates at two years follow-up.
  
  
  METHODS
  Level 4: Case series.
authors.affiliation: Insall Scott Kelly Institute for Orthopaedics and Sports Medicine St. Francis Hospital , NY.
authors.forename: William J
authors.initials: WJ
authors.lastname: Long
authors.affiliation: Department of Orthopaedics and Rehabilitation University of Iowa Hospitals and Clinics.
authors.forename: Nicolas O
authors.initials: NO
authors.lastname: Noiseux
authors.affiliation: Department of Orthopaedic Surgery, Mayo Clinic.
authors.forename: Tad M
authors.initials: TM
authors.lastname: Mabry
authors.affiliation: Department of Orthopaedic Surgery, Mayo Clinic.
authors.forename: Arlen D
authors.initials: AD
authors.lastname: Hanssen
authors.affiliation: Department of Orthopaedic Surgery, Mayo Clinic.
authors.forename: David G
authors.initials: DG
authors.lastname: Lewallen
mesh_terms: D000077:Acetabulum / Q000601:surgery*; D000368:Aged; D000369:Aged, 80 and over; D019644:Arthroplasty, Replacement, Hip / Q000009:adverse effects* / Q000379:methods; D001843:Bone Cements / Q000737:chemistry; D015331:Cohort Studies; D020878:Device Removal; D005260:Female; D005500:Follow-Up Studies; D006622:Hip Prosthesis; D006801:Humans; D008297:Male; D008875:Middle Aged; D011474:Prosthesis Design; D011475:Prosthesis Failure; D012086:Reoperation / Q000379:methods; D012189:Retrospective Studies; D013635:Tantalum / Q000737:chemistry; D013997:Time Factors; D016896:Treatment Outcome
chemical_list: D001843:Bone Cements; D013635:Tantalum