Merck
  • Início
  • Resultados da busca
  • Polyethylene wear and osteolysis after cementless total hip arthroplasty with alumina-on-highly cross-linked polyethylene bearings in patients younger than thirty years of age.

Polyethylene wear and osteolysis after cementless total hip arthroplasty with alumina-on-highly cross-linked polyethylene bearings in patients younger than thirty years of age.

The Journal of bone and joint surgery. American volume (2013-06-21)
Young-Hoo Kim, Jang-Won Park, Chirag Patel, Dae-Youn Kim
RESUMO

We asked whether cementless total hip arthroplasties that made use of alumina-on-highly cross-linked polyethylene bearings would improve hip score and functional activity and reduce the prevalence of polyethylene wear, osteolysis, and aseptic loosening. Consecutive primary total hip arthroplasties were performed in fifty patients (a total of sixty hips among thirty-four men and sixteen women) who were younger than thirty years of age. The average age at the time of the index arthroplasty was 28.3 years (range, twenty-one to twenty-nine years). The average follow-up was 10.8 years (range, ten to twelve years). Osteolysis and polyethylene wear rates were evaluated with use of radiography and computed tomography. The mean Harris hip score, which was 38 points (range, 6 to 45 points) preoperatively, had improved to 95 points (range, 85 to 100 points) at a mean follow-up time of 10.8 years. The mean penetration (and standard error of the mean) of the polyethylene liner was 0.031 ± 0.004 mm per year. No hip had osteolysis or aseptic loosening. At a minimum of ten years and an average of 10.8 years postoperatively, the current generation of cementless acetabular and femoral components with alumina-on-highly cross-linked polyethylene bearings was functioning well and was not associated with the development of osteolysis in our group of patients younger than thirty years of age. While the long-term prevalence of polyethylene wear and osteolysis remains unknown, the midterm data are promising.

MATERIAIS
Número do produto
Marca
Descrição do produto

Supelco
Polyethylene, analytical standard, for GPC, 2,000
Sigma-Aldrich
Aluminum oxide, mesoporous, MSU-X (wormhole), average pore size 3.8 nm
Sigma-Aldrich
Polyethylene, Ultra-high molecular weight, surface-modified, powder, 125 μm avg. part. size
Sigma-Aldrich
Polyethylene, Medium density
Sigma-Aldrich
Polyethylene, High density, melt index 2.2 g/10 min (190 °C/2.16kg)
Sigma-Aldrich
Polyethylene, Ultra-high molecular weight, surface-modified, powder, 34-50 μm particle size
Sigma-Aldrich
Polyethylene, low density, melt index 25 g/10 min (190°C/2.16kg)
Sigma-Aldrich
Polyethylene, High density, melt index 12 g/10 min (190 °C/2.16kg)
Sigma-Aldrich
Polyethylene, Linear low density, melt index 1.0 g/10 min (190°C/2.16kg)
Sigma-Aldrich
Polyethylene, average Mw ~4,000 by GPC, average Mn ~1,700 by GPC
Sigma-Aldrich
Polyethylene, Ultra-high molecular weight, average Mw 3,000,000-6,000,000
Sigma-Aldrich
Aluminum oxide, nanowires, diam. × L 2-6 nm × 200-400 nm
Sigma-Aldrich
Aluminum oxide, 99.997% trace metals basis
Supelco
Aluminum oxide, activated, neutral, Brockmann Activity I
Supelco
Aluminum oxide, for the determination of hydrocarbons
Sigma-Aldrich
Aluminum oxide, pellets, 3 mm
Sigma-Aldrich
Aluminum oxide, fused, powder, primarily α-phase, 100-200 mesh
Sigma-Aldrich
Aluminum oxide, Corundum, α-phase, -100 mesh
Sigma-Aldrich
Aluminum oxide, fused, powder, primarily α-phase, -325 mesh
Sigma-Aldrich
Aluminum oxide, calcined, powder, primarily α-phase, 100-325 mesh
Sigma-Aldrich
Aluminum oxide, activated, acidic, Brockmann I, free-flowing, Redi-Dri
Sigma-Aldrich
Aluminum oxide, activated, neutral, Brockmann I, free-flowing, Redi-Dri
Sigma-Aldrich
Aluminum oxide, activated, basic, Brockmann I
Sigma-Aldrich
Aluminum oxide, activated, acidic, Brockmann I
Sigma-Aldrich
Aluminum oxide, activated, neutral, Brockmann I
Sigma-Aldrich
Aluminum oxide, Type WN-6, Neutral, Activity Grade Super I
Sigma-Aldrich
Aluminum oxide, powder, primarily α phase, ≤10 μm avg. part. size, 99.5% trace metals basis
Sigma-Aldrich
Aluminum oxide, pore size 58 Å, ~150 mesh
Sigma-Aldrich
Aluminum oxide, powder, 99.99% trace metals basis
Sigma-Aldrich
Aluminum oxide, nanoparticles, <50 nm particle size (DLS), 20 wt. % in isopropanol