A5076518979- Orthopaedic implants and arthroplasty
- Tribology and Wear Analysis
- Total Knee Arthroplasty Outcomes
- Advanced materials and composites
- Hip disorders and treatments
- Orthopedic Infections and Treatments
- Lubricants and Their Additives
Kyushu University
2018-2023
Abstract Recent studies have found a rapid increase of ultrahigh molecular weight polyethylene (UHMWPE) wear in the presence proteins from synovial fluid. Due to UHMWPE's high hydrophobicity, it tends adsorb tremendous amount proteins. Moreover, since UHMWPE has low thermal conductivity, temperature rise center contact area due frictional heating could cause protein denaturation It been shown that denatured may adhesive response. This study aimed address effects graphite and graphene oxide...
In this study, the reciprocating pin-on-plate sliding test was conducted between ultra-high molecular weight polyethylene (UHMWPE) and CoCrMo alloy with lubricants containing representative synovial fluid constituents, such as proteins, hyaluronic acid, phospholipids, to understand their effects on in vivo friction wear characteristics of implanted joint prostheses. To explore some details process, track remaining UHMWPE plate specimens morphologically analyzed by laser microscopy chemically...
The purpose of this study is to elucidate the boundary lubrication mechanism cooperation hyaluronic acid (HA) and phospholipids (DPPC) between articular cartilages. As cartilage tissue model, polyvinyl alcohol (PVA) hydrogel, which has similar water content elasticity. PVA hydrogel was prepared as follows; powder solved into deionized completely, then set in an environmental tester for repeat freezing thawing grow physical crosslinks. A rotational rheometer used friction test since apparatus...
To gain the understanding of in vivo friction and wear behavior implanted joint prosthesis, we carried out pin on plate reciprocating sliding tests. We applied for CoCrMo as specimen, UHMWPE specimen protein-free PBS solutions containing Albumin y-globulin (proteins), HA and/or DPPC test lubricants. After tests, analyzed surfaces by FT-IR. And each lubricant was measured viscosity. As results, proteins rapidly increased Coefficient Friction (CoF) found IR spectrum deriving from So Protein...