Results 251 to 260 of about 136,222 (300)
Some of the next articles are maybe not open access.
Alumina-on-alumina hip implants
The Journal of Bone and Joint Surgery. British volume, 2012Alumina–alumina bearings are among the most resistant to wear in total hip replacement. Examination of their surfaces is one way of comparing damage caused by wear of hip joints simulated in vitro to that seen in explanted bearings. The aim of this study was to determine whether second-generation ceramic bearings exhibited a better pattern of wear than
Affatato, S +4 more
openaire +3 more sources
Hydrogen sulfide adsorption on alumina, modified alumina, and molybdenum trioxide/alumina
The Journal of Physical Chemistry, 1986A systematic investigation of H/sub 2/S adsorption on Al/sub 2/O/sub 3/, modified Al/sub 2/O/sub 3/, and MoO/sub 3//Al/sub 2/O/sub 3/ catalysts was carried out by using temperature-programmed desorption techniques, coupled with IR and XPS. SiO/sub 2/-Al/sub 2/O/sub 3/ and AlPO/sub 4/ were also studied for comparison. It was found that Al/sub 2/O/sub 3/
Yasuaki Okamoto +4 more
openaire +1 more source
ALUMINA-ON-ALUMINA TOTAL HIP ARTHROPLASTY
The Journal of Bone and Joint Surgery-American Volume, 2005Ceramic-on-ceramic couplings are attractive alternative bearing surfaces that have been reported to eliminate or reduce problems related to polyethylene wear debris. Disappointing experiences with alumina ceramic bearings in the past have led to many improvements in the manufacture and design of ceramic implants. The purpose of the present study was to
Jeong Joon, Yoo +5 more
openaire +2 more sources
Evolution of Alumina-on-Alumina Implants
Clinical Orthopaedics and Related Research, 2000The use of alumina-on-alumina sliding surfaces for total hip replacement is becoming increasingly popular. The author has reviewed the 30-year history of this material. Technical aspects such as the quality of the material, quality of the design, and the risk of fracture are presented.
openaire +2 more sources
Joining of alumina with a porous alumina interlayer
Ceramics International, 2012Abstract In the joining of structural ceramics, a porous interlayer is generally believed to deteriorate the mechanical properties of the joint. This paper, however, shows that a porous interlayer can sustain high adhesion strength when cavities or interfacial cracks are eliminated.
Hiroyuki Miyazaki +3 more
openaire +1 more source
Alumina-Alumina and Alumina-Polyethylene Total Hip Prostheses
2004By the late 1960s, the Charnley hip implant system with a metallic femoral stem and an ultrahigh molecular weight polyethylene (UHMWPE) acetabular component was the primary design for successful total hip arthroplasty (THA). Many of today’s concerns regarding the Charnley system were recognized as early as 1970.
Julie A. Miller +2 more
openaire +1 more source
Microseparation and Stripe Wear in Alumina-On-Alumina Hip Implants
The International Journal of Artificial Organs, 2011The combination of materials that still has highest wear resistance for total hip replacement is ceramic-on-ceramic. However, brittleness is a major concern for ceramics: in vivo and in vitro studies on ceramic hip prostheses correlate microseparation with hip noise, ceramic wear, or ceramic liner damage.
Affatato, Saverio +2 more
openaire +3 more sources
Alumina: Filtration in the alumina production process
Filtration & Separation, 2010The production of alumina from bauxite is a vital first step in the production of aluminium. Filtration and separation equipment plays a significant role in this process, in particularly challenging conditions. Trevor Sparks explains.
openaire +1 more source