title: Stability of revision acetabular components using the rim-fit technique.
abstract: Use of the rim-fit technique in revision acetabular surgery was reviewed for 20 hips in 18 patients. Defects at revision surgery included isolated medial segmental and global cavitary deficiencies with largely intact peripheral rim. A cementless acetabular component is placed to achieve a press-fit against the bony acetabular rim after morselized allograft and/or autograft was placed behind the cup. The average follow-up period was 68.3 months (5.7 years) (range, 27-112 months). Cup migration was assessed using digital radiography. Average vertical migration was 1.02 mm superiorly, and average horizontal migration was 0.8 mm medially. The abduction angle changed on average by 0.25 degrees. Use of the rim-fit technique for treatment of cavitary acetabular defects is associated with component stability and minimal component migration.
authors.affiliation: Department of Orthopaedic Surgery, Wake Forest University Health Sciences, Winston-Salem, North Carolina 27157, USA.
authors.forename: Jason E
authors.initials: JE
authors.lastname: Lang
authors.forename: James V
authors.initials: JV
authors.lastname: Bono
authors.forename: David R
authors.initials: DR
authors.lastname: Whiddon
authors.forename: Aaron K
authors.initials: AK
authors.lastname: Salyapongse
authors.forename: Darius M
authors.initials: DM
authors.lastname: Moezzi
authors.forename: Eric L
authors.initials: EL
authors.lastname: Smith
mesh_terms: D000077:Acetabulum / Q000000981:diagnostic imaging / Q000601:surgery*; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D019644:Arthroplasty, Replacement, Hip / Q000379:methods*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D011475:Prosthesis Failure; D011859:Radiography; D012086:Reoperation / Q000379:methods