PMID- 32174389
OWN - NLM
STAT- MEDLINE
DCOM- 20210514
LR  - 20210514
IS  - 1878-0180 (Electronic)
IS  - 1878-0180 (Linking)
VI  - 104
DP  - 2020 Apr
TI  - Structural and tribological characteristics of ultra-low-wear polyethylene as 
      artificial joint materials.
PG  - 103629
LID - S1751-6161(19)31339-6 [pii]
LID - 10.1016/j.jmbbm.2020.103629 [doi]
AB  - Ultra-low-wear polyethylene (ULWPE) is a new metallocene catalyzed high density 
      polyethylene (HDPE)material. Previous studies have demonstrated that it has 
      excellent biocompatibility and wear resistance, whereupon indicating great 
      potential in the applications to artificial joints. However, as a newly developed 
      material, its tribological behavior and wear resistance mechanism has not been 
      well understood. In the current study, we experimentally evaluated the 
      tribological behavior of ULWPE, and investigated its high wear resistance 
      mechanism in terms of microstructure, crystallization properties, mechanical, 
      physical, and chemical properties. ULWPE manifested the best tribological 
      performance on pin-on-disc (POD) wear tests compared with the most widely used 
      artificial joints materials, with a wear volume of 0.720 +/- 0.032 mm(3)/million 
      cycles (Mc) and 0.600 +/- 0.027 mm(3)/Mc against cobalt-chromium (CoCr) alloy disc 
      and zirconia toughened alumina (ZTA) ceramic disc, respectively. The results of 
      the wear morphology analysis showed that the surface of ULWPE was the slightest, 
      with no obvious surface damage, debris shedding and wear pits. We reveal that 
      three major factors mainly contributed to its high wear resistance. First, ULWPE 
      demonstrated a high crystallinity and a compact crystalline morphology comprised 
      of long linear molecular chains, which contributed to its good mechanical 
      performance. As confirmed by the mechanical test, ULWPE had a very high density, 
      hardness, and tensile elongation at break. The high hardness and strength laid a 
      solid foundation to a low wear volume, and its high ductility and hardness helped 
      to endure abrasive and adhesive wear, resulting in excellent wear resistance. 
      Second, the results of wettability analysis showed that the contact angle formed 
      on the surface of ULWPE was the lowest and the surface energy was the highest. 
      The hydrophilicity of ULWPE provided good lubrication conditions in body fluid. 
      Third, it also had a lower oxidation index. The high hardness, high strength, 
      high ductility and good wetting of ULWPE materials reduced the damage of the 
      material to adhesion and abrasive wear, resulting in excellent wear resistance.
CI  - Copyright (c) 2020 Elsevier Ltd. All rights reserved.
FAU - Cui, Wen
AU  - Cui W
AD  - Tribology Research Institute, School of Mechanical Engineering, Southwest 
      Jiaotong University, Chengdu, 610031, China.
FAU - Bian, Yanyan
AU  - Bian Y
AD  - Department of Orthopedics, Peking Union Medical College Hospital, Chinese Academy 
      of Medical Sciences & Peking Union Medical College, Beijing, 100730, China.
FAU - Zeng, Hongkai
AU  - Zeng H
AD  - Tribology Research Institute, School of Mechanical Engineering, Southwest 
      Jiaotong University, Chengdu, 610031, China.
FAU - Zhang, Xiaogang
AU  - Zhang X
AD  - Tribology Research Institute, School of Mechanical Engineering, Southwest 
      Jiaotong University, Chengdu, 610031, China.
FAU - Zhang, Yali
AU  - Zhang Y
AD  - Tribology Research Institute, School of Mechanical Engineering, Southwest 
      Jiaotong University, Chengdu, 610031, China. Electronic address: 
      aeryzhang@163.com.
FAU - Weng, Xisheng
AU  - Weng X
AD  - Department of Orthopedics, Peking Union Medical College Hospital, Chinese Academy 
      of Medical Sciences & Peking Union Medical College, Beijing, 100730, China.
FAU - Xin, Shixuan
AU  - Xin S
AD  - PetroChina Petrochemical Research Institute, PetroChina Synthetic Resin Key 
      Laboratory, Beijing, 100195, China.
FAU - Jin, Zhongmin
AU  - Jin Z
AD  - Tribology Research Institute, School of Mechanical Engineering, Southwest 
      Jiaotong University, Chengdu, 610031, China; School of Mechanical Engineering, 
      University of Leeds, Leeds, LS2 9JT, UK.
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
DEP - 20200110
PL  - Netherlands
TA  - J Mech Behav Biomed Mater
JT  - Journal of the mechanical behavior of biomedical materials
JID - 101322406
RN  - 0 (Chromium Alloys)
RN  - 0 (Polyethylenes)
RN  - 9002-88-4 (Polyethylene)
RN  - LMI26O6933 (Aluminum Oxide)
SB  - IM
MH  - Aluminum Oxide
MH  - Chromium Alloys
MH  - Hardness
MH  - Materials Testing
MH  - *Polyethylene
MH  - *Polyethylenes
MH  - Surface Properties
OTO - NOTNLM
OT  - Artificial joints
OT  - Bio-tribology behavior
OT  - Crystallization property
OT  - Ultra-low-wear polyethylene
OT  - Wear resistance mechanism
COIS- Declaration of competing interest The authors declare no possible conflict of 
      interests.
EDAT- 2020/03/17 06:00
MHDA- 2021/05/15 06:00
CRDT- 2020/03/17 06:00
PHST- 2019/09/14 00:00 [received]
PHST- 2019/12/11 00:00 [revised]
PHST- 2020/01/07 00:00 [accepted]
PHST- 2020/03/17 06:00 [entrez]
PHST- 2020/03/17 06:00 [pubmed]
PHST- 2021/05/15 06:00 [medline]
AID - S1751-6161(19)31339-6 [pii]
AID - 10.1016/j.jmbbm.2020.103629 [doi]
PST - ppublish
SO  - J Mech Behav Biomed Mater. 2020 Apr;104:103629. doi: 10.1016/j.jmbbm.2020.103629. 
      Epub 2020 Jan 10.