Paper Title:
Medial Placement of a Cementless Acetabular Component in a Modern Alumina-on-Alumina THA
  Abstract

Medial placement of a cementless acetabular component into or beyond the medial wall of a shallow, dysplastic acetabulum is a technique to enhance its coverage during difficult total hip arthroplasty (THA). Dysplastic hips almost always need small size of acetabular component, so an accelerated polyethylene wear can occur when a conventional bearing surface is used. Modern alumina-on-alumina couplings can be an alternative for these patients. We evaluated the clinical results of 43 medially placed cementless acetabular components (PLASMACUP®SC) incorporating a modern alumina bearing surface (BIOLOX® forte). Acetabular components were inserted medially beyond the ilioischial line and, therefore, beyond the level of the cortical bone of the cotyloid notch, and followed up for more than 5 years (range, 60 – 93 months). In 14 hips, the medial acetabular wall was perforated purposefully and the medial aspect of the cup was placed beyond both the ilioischial and the iliopubic line on radiographs. The mean Harris hip score improved from 55.3 points preoperatively to 94.5 points postoperatively. Postoperatively, the hip center migrated 12.1 mm medially and 1.5 mm inferiorly. The average amount of cup protrusion beyond the ilioischial and the iliopubic line was 3.1 mm and 1.9 mm, respectively. The average superolateral coverage of the cup was 98.5 percent. During follow-up, no osteolysis or loosening of acetabular components was observed and no revision was required. Medial placement of a cementless acetabular component into or beyond the medial acetabular wall offers predictable clinical results and durable fixation in modern alumina-on-alumina THA.

  Info
Periodical
Key Engineering Materials (Volumes 330-332)
Main Theme
Edited by
Xingdong Zhang, Xudong Li, Hongsong Fan, Xuanyong Liu
Pages
1243-1246
DOI
10.4028/www.scientific.net/KEM.330-332.1243
Citation
J. J. Yoo, H. J. Kim, Y. M. Kim, K. S. Yoon, K. H. Koo, K. W. Nam, Y. L. Kim, "Medial Placement of a Cementless Acetabular Component in a Modern Alumina-on-Alumina THA", Key Engineering Materials, Vols. 330-332, pp. 1243-1246, 2007
Online since
February 2007
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: Hiroshi Fujita, Masahiko Miyata, Ryouichi Nagahara, Tomoo Okumura
Abstract:29 cases of primary total hip arthroplasty (THA) using interface bioactive bone cement technique (IBBC) combined with third generation...
1329
Authors: Seok Cheol Kim, Hironobu Oonishi, Hiroko Inoue, Hiroshi Fujita, Yuichi Doiguchi, Koichi Oomamiuda
Abstract:THAs were performed with conventional cementing on one side (1985 to 1986) and with modified cementing using HA granules on the other side...
1337
Authors: Jeong Joon Yoo, Hee Joong Kim, Young Min Kim, Kang Sup Yoon, Kyung Hoi Koo, Kwang Woo Nam, Sang Ik Shin
Abstract:Limitation in liner and head options available to the surgeon may be the most practical disadvantage of alumina-on-alumina total hip...
1353
Authors: Masahiro Hasegawa, Akihiro Sudo, Atsumasa Uchida
Abstract:In ceramic-on-ceramic total hip arthroplasty (THA), modular acetabular component with a sandwich insertion was developed and evaluated...
1357
Authors: James M. Buchanan
Abstract:Wear debris contributes to the development of granulomatous debris disease and loosening. It is accepted that hydroxyapatite ceramic (HA)...
1259