The impact of storage time on the wear rates of ultrahigh-molecular-weight polyethylene acetabular liners in hip simulators.
The aim of the study is to explore the impact of storage time on wear rates. Two groups of acetabular liners with a storage time of 1 and 4 years were tested on 2 hip simulators of the same type. There were 6 liners in each group. Gravimetric analysis was performed every 500 000 cycles for a total of 3 million cycles. The mean wear rate for the group of 4-year-old liners (36.3 mg/million cycles) was significantly higher than that for the 1-year-old group (23.1 mg/million cycles) (P < .05). After the last gravimetric analysis, scanning electron microscopy was used to observe the wear patterns of the bearing surfaces. This study found that wear resistance decreased as storage time increased.
Weimin
Fan
F
Department of Orthopedics, The First Affiliated Hospital of Nanjing Medical University Nanjing, China.
Huanghe
Song
S
Xiang
Li
L
Feng
Liu
L
Qing
Wang
W
D000077:Acetabulum; D019644:Arthroplasty, Replacement, Hip / Q000295:instrumentation*; D019544:Equipment Failure Analysis; D006622:Hip Prosthesis / Q000592:standards*; D006801:Humans; D008422:Materials Testing / Q000379:methods*; D008855:Microscopy, Electron, Scanning; D020959:Polyethylene; D011475:Prosthesis Failure; D013997:Time Factors
D020959:Polyethylene