title: The use of a trabecular metal acetabular component and trabecular metal augment for severe acetabular defects.
abstract: Stable acetabular fixation cannot be reliably achieved with the use of a hemispherical porous coated component alone in patients with a Paprosky type IIIa defect. The purpose of the present study was to determine the short-term results of a tantalum porous coated hemispherical acetabular component supported with a modular tantalum augment in Paprosky type IIIa defects. A total of 28 patients (28 hips) were treated for a type IIIa acetabular defect between 2001 and 2003 with the use of a trabecular metal acetabular component supported with a modular, superiorly placed trabecular metal augment. At an average of 3.1 years follow-up, 1 patient required rerevision for recurrent instability. The remaining hips remain radiographically stable. Clinically, the patients' modified Postel Merle d'Aubigne score improved from 6.8 preoperatively to 10.6 postoperatively. The use of a trabecular metal acetabular component with a superiorly placed trabecular metal augment demonstrates encouraging short-term results for Paprosky type IIIa acetabular defects.
authors.affiliation: Department of Orthopaedic Surgery, Rush University Medical Center, Chicago, IL, USA.
authors.forename: Scott M
authors.initials: SM
authors.lastname: Sporer
authors.forename: Wayne G
authors.initials: WG
authors.lastname: Paprosky
mesh_terms: D000077:Acetabulum / Q000000981:diagnostic imaging / Q000601:surgery*; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D019644:Arthroplasty, Replacement, Hip / Q000009:adverse effects / Q000379:methods*; D001696:Biomechanical Phenomena; D005260:Female; D006801:Humans; D007593:Joint Instability; D008297:Male; D008875:Middle Aged; D010147:Pain Measurement; D011474:Prosthesis Design / Q000379:methods*; D011475:Prosthesis Failure; D011859:Radiography; D012086:Reoperation / Q000379:methods; D012189:Retrospective Studies; D013635:Tantalum
chemical_list: D013635:Tantalum