title: Influence of dynamic load on friction behavior of human articular cartilage, stainless steel and polyvinyl alcohol hydrogel as artificial cartilage.
abstract: Many biomaterials are being developed to be used for cartilage substitution and hemiarthroplasty implants. The lubrication property is a key feature of the artificial cartilage. The frictional behavior of human articular cartilage, stainless steel and polyvinyl alcohol (PVA) hydrogel were investigated under cartilage-on-PVA hydrogel contact, cartilage-on-cartilage contact and cartilage-on-stainless steel contact using pin-on-plate method. Tests under static load, cyclic load and 1 min load change were used to evaluate friction variations in reciprocating motion. The results showed that the lubrication property of cartilage-on-PVA hydrogel contact and cartilage-on-stainless steel contact were restored in both 1 min load change and cyclic load tests. The friction coefficient of PVA hydrogel decreased from 0.178 to 0.076 in 60 min, which was almost one-third of the value under static load in continuous sliding tests. In each test, the friction coefficient of cartilage-on-cartilage contact maintained far lower value than other contacts. It is indicated that a key feature of artificial cartilage is the biphasic lubrication properties.
authors.affiliation: School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai, People's Republic of China.
authors.forename: Feng
authors.initials: F
authors.lastname: Li
authors.forename: Yonglin
authors.initials: Y
authors.lastname: Su
authors.forename: Jianping
authors.initials: J
authors.lastname: Wang
authors.forename: Gang
authors.initials: G
authors.lastname: Wu
authors.forename: Chengtao
authors.initials: C
authors.lastname: Wang
mesh_terms: D002102:Cadaver; D002358:Cartilage, Articular / Q000187:drug effects* / Q000502:physiology; D019544:Equipment Failure Analysis; D005269:Femur / Q000473:pathology / Q000502:physiology; D017276:Friction / Q000187:drug effects / Q000502:physiology; D006244:Hardness; D006801:Humans; D007595:Joint Prosthesis; D007719:Knee Joint / Q000473:pathology / Q000502:physiology; D008422:Materials Testing / Q000295:instrumentation; D008954:Models, Biological; D011142:Polyvinyl Alcohol / Q000737:chemistry / Q000494:pharmacology*; D013193:Stainless Steel / Q000737:chemistry / Q000494:pharmacology*; D013314:Stress, Mechanical; D013499:Surface Properties; D016474:Weight-Bearing / Q000502:physiology
chemical_list: C062364:polyvinyl alcohol hydrogel; D013193:Stainless Steel; D011142:Polyvinyl Alcohol