Wear Characteristics of a Novel Bearing System for Artificial Knee Joint : Micro-Pocket-Covered Femoral Component and Tibial Poro-Elastic-Hydrated Cartilage

スポンサーリンク

概要

• 論文の詳細を見る

• This paper presents an experimental investigation upon the wear characteristics of a novel bearing system proposed for the artificial knee joints. Such bearing system is original in the meaning that micro-pockets are machined on surface of the rigid femoral component; a poro-elastic-hydrated layer, called artificial cartilage, covers the rigid tibial substrate. Under compression, the fluid exudes from the artificial cartilage, fills and pressurizes the micro-pockets. In this way, a poro-elasto-hydrodynamic regime of lubrication is developed. Wear tests are performed with different types of artificial cartilages made in PVA hydrogel, articulating against smooth and micro-pocket-covered femoral components. Influence of the number of walking cycles, femoral porosity, depth of the micro-pockets, water content and polymerization degree of the PVA hydrogel upon its wear factor is illustrated. For wear tests performed until 10^6 walking cycles, in the case of PVA hydrogel with 12300 polymerization degree and 77% water content versus smooth component, the wear factor is on order of 10^<-6>-10^<-5>mm^3/Nm; for the same artificial cartilage against a femoral component uniformly covered by identical micro-pockets of 50μm depth, on 15% of its surface, the wear factor drops in the range 10^<-7>-10^<-6>mm^3/Nm, i.e., the wear factor reduces with 80%. The highest wear reduction due to the micro-pockets presence is obtained in the case of PVA hydrogel with 77% water content, i.e., for a fluid amount similar to that of the natural cartilage.

• 一般社団法人日本機械学会の論文
• 2004-03-15

著者

• IWATSUBO Takuzo

  Department of Mechanical Engineering, Faculty of Engineering, Kobe University

• NISHINO Takashi

  Department of Anesthesiology

• Nishino Takashi

  Department Of Chemical Science And Engineering Faculty Of Engineering Kobe University

• Matsuda Mitsumasa

  Department Of Mechanical Engineering Faculty Of Engineering Kobe University

• SUCIU Aneta

  Department of Mechanical Engineering, Faculty of Engineering, Kobe University

• Iwatsubo T

  Department Of Mechanical Engineering Faculty Of Engineering Kobe University

• Iwatsubo Takuzo

  Department Of Mechanical Engineering Kobe University

• Suciu Aneta

  Department Of Mechanical Engineering Faculty Of Engineering Kobe University

• Iwatsubo Takuzo

  Department Of Mechanical Engineering Faculty Of Engineering Kobe University

• NISHINO Takashi

  Department of Chemical Science and Engineering, Faculty of Engineering, Kobe University

• MATSUDA Mitsumasa

  Department of Anesthesiology, Tokai University School of Medicine

関連論文

• Effects of Naloxone on Respiratory Sensation before and after a Removal of Severe Respiratory Stress
• Novel Principle of Mechanical Energy Dissipation : Part 2-Dynamic Performances of Colloidal Damper
• Simulation of Fracture Healing Using Cellular Automata : Influence of Operation Conditions on Healing Result in External Fixation
• Sleep-Disordered Breathing in Acromegalics -Relation of Hormonal Levels and Quantitative Sleep Study by means of Bedside Oximeter-
• On the Thermal Stresses of an Infinite Plate with an Infinite Row of Circular Inclusions under Uniform Heat Flow
• Wear Characteristics of a Novel Bearing System for Artificial Knee Joint : Micro-Pocket-Covered Femoral Component and Tibial Poro-Elastic-Hydrated Cartilage
• A Study upon Durability of the Artificial Knee Joint with PVA Hydrogel Cartilage
• In situ observation of surface deformation of polymer films by atomic force microscopy
• Analysis of Golf Impact Phenomenon and Ball Trajectory
• Non-Linear Vibration Analysis of Rotor System Using Substructure Synthesis Method : Analysis with Consideration of Non-Linearity of Rotor
• Pendelluft is not the major contributor to respiratory insufficiency in dogs with flail chest : a mathematical analysis
• On the Thermal Stresses of an Infinite Plate with an Infinite Row of Circular Inclusions unber the Steady State of Temperature : Case of an Infinite Plate Having an Infinite Row of Pairs of Heat Sources
• Novel Principle of Mechanical Energy Dissipation : Part 1-Static Performances of Colloidal Damper
• Suppression Phenomena of Resonant Oscillations in Strongly Nonlinear Systems due to Additional Asynchronous Excitations
• Asynchronous Stabilization Phenomena of Resonant Oscillations in Nonlinear Systems
• Large-Scale Structural-Acoustic Analysis by the Sub-Space Superposition Synthesis Method
• The Relationship Between the Molecular Weight and the Anticoagulant Activity of Two Types of Fucan Sulfates from the Brown Seaweed Ecklonia kurome(Biological Chemistry)
• Ubretid (distigmine bromide) taken to treat urinary retention prolongs the effect of suxamethonium
• All-cellulose composite and nanocomposite made from partially dissolved micro- and nanofibers of canola straw
• Effects of withdrawal of phasic lung inflation during normocapnia and hypercapnia on the swallowing reflex in humans
• Is prophylactic mechanical ventilation really necessary after esophageal surgery?
• Physiological and Pathophysiological Implications of Upper Airway Reflexes in Humans
• Research in anesthesia and the future of our specialty
• Elastic Modulus of the Crystalline Regions of Poly (p-phenylene terephthalamide) Single Fiber Using SPring-8 Synchrotron Radiation
• A Computer-Aided-Design Technique for Design of a Six-Section Elliptic Tire-Building Drum
• Dyspnea and its interaction with pain
• In situ AFM Observation of Surface Deformation of Polyimide Film
• Consideration of Whirl Frequency Ratio and Effective Damping Coefficient of Seal
• The effects of the early administration of sivelestat sodium, a selective neutrophil elastase inhibitor, on the postoperative course after radical surgery for esophageal cancer
• Poly(vinyl alcohol)/graphene oxide nanocomposites prepared by a simple eco-process
• Experimental and Theoretical Study on Swirl Braked Labyrrinth Seal
• The Effect of Swirl Braked Grooved Seals on the Stability and the Unbalance Response of a Flexible Rotor
• Experimental Study of a Colloidal Damper to Practical Application
• The Optimum Design of Hydrodynamic Lubrication Bearing for Minimization of the Total Life Cost
• Synthesis of High-molecular-weight Head-to-tail-type Poly(3-substituted-thiophene)s by Cross-coupling Polycondensation with [CpNiCl(NHC)] as a Catalyst

もっと見る 閉じる

スポンサーリンク