Survivorship of uncemented acetabular parts compared

Survivorship of uncemented acetabular parts compared
For total hip arthroplasty revisions, titanium wire mesh cups and cross-linked polyethylene liners are among new uncemented acetabular components that improve long-term implant survival, according to a study published in the June 20 issue of The Journal of Bone & Joint Surgery.

(HealthDay) -- For total hip arthroplasty revisions, titanium wire mesh cups and cross-linked polyethylene liners are among new uncemented acetabular components that improve long-term implant survival, according to a study published in the June 20 issue of The Journal of Bone & Joint Surgery.

To compare the survivorship of historical and current uncemented acetabular components following total hip arthroplasty, Hilal Maradit Kremers, M.D., of the Mayo Clinic in Rochester, Minn., and associates followed 3,236 patients who underwent 3,448 revision total hip arthroplasty procedures from 1984 through 2004. They compared overall and cause-specific survival rates of 10 different acetabular components, adjusting for age and sex.

The researchers identified 605 repeat revisions, including 386 cup revisions, with an overall survival rate of 69 percent at 15 years. Cup revision for aseptic loosening was significantly more common for beaded designs (hazard ratio [HR], 2.01) and less common for trabecular metal designs (HR, 0.25), compared with titanium wire mesh. During a median 5.2-year follow-up of 534 total arthroplasties with cross-linked polyethylene liners there were no liner revisions for wear and/or osteolysis. The risk of wear-related revision was significantly lower with cross-linked polyethylene than conventional liners. The risk of repeat revision was not associated with femoral head size or use of an elevated liner.

"In the setting of revision total , cup survival was worse with beaded acetabular designs compared with titanium wire mesh or highly porous designs," the authors write. "Cross-linked polyethylene liners were associated with a reduced risk of wear-related liner revision."

One or more of the authors disclosed receiving payments or services, either directly or indirectly, from a third party in support of an aspect of this work.

Abstract

Full Text (subscription or payment may be required)

add to favorites email to friend print save as pdf

Related Stories

Recommended for you

British Lords hold ten-hour debate on assisted dying

Jul 19, 2014

Members of Britain's unelected House of Lords spent almost ten hours on Friday discussing whether to legalise assisted dying, in an often emotional debate putting the question back on the agenda, if not on the statute books.

AbbVie, Shire agree on $55B combination

Jul 18, 2014

The drugmaker AbbVie has reached a deal worth roughly $55 billion to combine with British counterpart Shire and become the latest U.S. company to seek an overseas haven from tax rates back home.

Safety problems at US germ labs acknowledged

Jul 16, 2014

(AP)—The director of the U.S. Centers for Disease Control and Prevention acknowledged Wednesday that systemic safety problems have for years plagued federal public health laboratories that handle dangerous ...

User comments