このエントリーをはてなブックマークに追加
ID 30721
JaLCDOI
フルテキストURL
著者
Inoue, Atsushi Okayama University
Asaumi, Koji Okayama University
Endo, Hirosuke Okayama University
Fujiwara, Kazuo Okayama University
Mitani, Shigeru Okayama University
Ozaki, Toshifumi Okayama University Kaken ID researchmap
抄録
The present retrospective study assessed radiographs to determine socket wear in total hip arthroplasty (THA) with 22-mm zirconia or COP (Cobalt-Chrome alloy rich in Cobalt and Phosphorous) heads, and in cemented stems at more than 10 years after operation. Sockets of ultra high molecular weight polyethylene were used in each of two THA groups (13 hips each) in a clinical trial in our hospital between 1989 and 1990. Three observers carried out masked assessments of the radiographs. Upon fi nal examination, there was no remarkable loosening in the zirconia or COP group, and no case had required revision surgery as of 2005. There was a statistically signifi cant diff erence between the 2 groups in average annual linear wear, at 0.093 mm/year and 0.046 mm/year in the zirconia and COP groups, respectively. Volume wear and average annual volume wear were also signifi cantly greater in the zirconia group despite its superior mechanical strength and toughness in vitro. Our present fi ndings do not confi rm early expectations of lower wear in long-term results of 22-mm zirconia femoral heads used in THA.
キーワード
total hip arthroplasty
zirconia head
COP head
polyethylene
wear
Amo Type
Original Article
発行日
2006-12
出版物タイトル
Acta Medica Okayama
60巻
6号
出版者
Okayama University Medical School
開始ページ
311
終了ページ
318
ISSN
0386-300X
NCID
AA00508441
資料タイプ
学術雑誌論文
言語
English
論文のバージョン
publisher
査読
有り
PubMed ID
Web of Science KeyUT