Comparison of 10-year clinical wear of annealed and remelted highly cross-linked polyethylene: A propensity-matched cohort study

Satoshi Hamai, Yasuharu Nakashima, Naohiko Mashima, Takuaki Yamamoto, Tomomi Kamada, Goro Motomura, Hiroshi Imai, Jun ichi Fukushi, Hiromasa Miura, Yukihide Iwamoto

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

No previous studies comparing the clinical wear rates of the two different kinds of cross-linked ultra-high-molecular-weight polyethylene (XLPE), annealed and remelted, are available. We compared the creep and steady wear rates of 36 matched pairs (72 hips in total) adjusting for baseline characteristics with propensity score matching techniques. Zirconia femoral heads with 26-mm diameter were used in all cases. The femoral-head cup penetration was measured digitally on radiographs. Significantly greater creep ( p=0.006) was detected in the remelted (0.234 mm) than annealed (0.159 mm) XLPE. However, no significant difference ( p=0.19) was found between the steady wear rates (0.003 and 0.008 mm/year, respectively) of the annealed and remelted XLPE. Multiple regression analyses showed that remelted XLPE is significant independent variable ( p<0.001) that is positively associated with creep. However, the patient age and body weight, cup size, the liner thickness, cup inclination, follow-up periods, and postoperative Merle d'Aubigné hip score had no significant effects ( p>0.05) on the steady wear rates. No patients exhibited above the osteolysis threshold of 0.1 mm/year, progressive radiolucencies, osteolysis, or polyethylene fracture. This[U+3000]propensity-matched cohort study document no significant difference in wear resistant performances of annealed and remelted XLPE over an average period of 10 years.

Original languageEnglish
Pages (from-to)99-107
Number of pages9
JournalJournal of the Mechanical Behavior of Biomedical Materials
Volume59
DOIs
Publication statusPublished - Jun 1 2016

Fingerprint

Polyethylene
Polyethylenes
Wear of materials
Creep
Ultrahigh molecular weight polyethylenes
Zirconia

All Science Journal Classification (ASJC) codes

  • Biomaterials
  • Biomedical Engineering
  • Mechanics of Materials

Cite this

Comparison of 10-year clinical wear of annealed and remelted highly cross-linked polyethylene : A propensity-matched cohort study. / Hamai, Satoshi; Nakashima, Yasuharu; Mashima, Naohiko; Yamamoto, Takuaki; Kamada, Tomomi; Motomura, Goro; Imai, Hiroshi; Fukushi, Jun ichi; Miura, Hiromasa; Iwamoto, Yukihide.

In: Journal of the Mechanical Behavior of Biomedical Materials, Vol. 59, 01.06.2016, p. 99-107.

Research output: Contribution to journalArticle

Hamai, Satoshi ; Nakashima, Yasuharu ; Mashima, Naohiko ; Yamamoto, Takuaki ; Kamada, Tomomi ; Motomura, Goro ; Imai, Hiroshi ; Fukushi, Jun ichi ; Miura, Hiromasa ; Iwamoto, Yukihide. / Comparison of 10-year clinical wear of annealed and remelted highly cross-linked polyethylene : A propensity-matched cohort study. In: Journal of the Mechanical Behavior of Biomedical Materials. 2016 ; Vol. 59. pp. 99-107.
@article{3daf411c1a22409c914724c5eda6ae29,
title = "Comparison of 10-year clinical wear of annealed and remelted highly cross-linked polyethylene: A propensity-matched cohort study",
abstract = "No previous studies comparing the clinical wear rates of the two different kinds of cross-linked ultra-high-molecular-weight polyethylene (XLPE), annealed and remelted, are available. We compared the creep and steady wear rates of 36 matched pairs (72 hips in total) adjusting for baseline characteristics with propensity score matching techniques. Zirconia femoral heads with 26-mm diameter were used in all cases. The femoral-head cup penetration was measured digitally on radiographs. Significantly greater creep ( p=0.006) was detected in the remelted (0.234 mm) than annealed (0.159 mm) XLPE. However, no significant difference ( p=0.19) was found between the steady wear rates (0.003 and 0.008 mm/year, respectively) of the annealed and remelted XLPE. Multiple regression analyses showed that remelted XLPE is significant independent variable ( p<0.001) that is positively associated with creep. However, the patient age and body weight, cup size, the liner thickness, cup inclination, follow-up periods, and postoperative Merle d'Aubign{\'e} hip score had no significant effects ( p>0.05) on the steady wear rates. No patients exhibited above the osteolysis threshold of 0.1 mm/year, progressive radiolucencies, osteolysis, or polyethylene fracture. This[U+3000]propensity-matched cohort study document no significant difference in wear resistant performances of annealed and remelted XLPE over an average period of 10 years.",
author = "Satoshi Hamai and Yasuharu Nakashima and Naohiko Mashima and Takuaki Yamamoto and Tomomi Kamada and Goro Motomura and Hiroshi Imai and Fukushi, {Jun ichi} and Hiromasa Miura and Yukihide Iwamoto",
year = "2016",
month = "6",
day = "1",
doi = "10.1016/j.jmbbm.2015.12.022",
language = "English",
volume = "59",
pages = "99--107",
journal = "Journal of the Mechanical Behavior of Biomedical Materials",
issn = "1751-6161",
publisher = "Elsevier BV",

}

TY - JOUR

T1 - Comparison of 10-year clinical wear of annealed and remelted highly cross-linked polyethylene

T2 - A propensity-matched cohort study

AU - Hamai, Satoshi

AU - Nakashima, Yasuharu

AU - Mashima, Naohiko

AU - Yamamoto, Takuaki

AU - Kamada, Tomomi

AU - Motomura, Goro

AU - Imai, Hiroshi

AU - Fukushi, Jun ichi

AU - Miura, Hiromasa

AU - Iwamoto, Yukihide

PY - 2016/6/1

Y1 - 2016/6/1

N2 - No previous studies comparing the clinical wear rates of the two different kinds of cross-linked ultra-high-molecular-weight polyethylene (XLPE), annealed and remelted, are available. We compared the creep and steady wear rates of 36 matched pairs (72 hips in total) adjusting for baseline characteristics with propensity score matching techniques. Zirconia femoral heads with 26-mm diameter were used in all cases. The femoral-head cup penetration was measured digitally on radiographs. Significantly greater creep ( p=0.006) was detected in the remelted (0.234 mm) than annealed (0.159 mm) XLPE. However, no significant difference ( p=0.19) was found between the steady wear rates (0.003 and 0.008 mm/year, respectively) of the annealed and remelted XLPE. Multiple regression analyses showed that remelted XLPE is significant independent variable ( p<0.001) that is positively associated with creep. However, the patient age and body weight, cup size, the liner thickness, cup inclination, follow-up periods, and postoperative Merle d'Aubigné hip score had no significant effects ( p>0.05) on the steady wear rates. No patients exhibited above the osteolysis threshold of 0.1 mm/year, progressive radiolucencies, osteolysis, or polyethylene fracture. This[U+3000]propensity-matched cohort study document no significant difference in wear resistant performances of annealed and remelted XLPE over an average period of 10 years.

AB - No previous studies comparing the clinical wear rates of the two different kinds of cross-linked ultra-high-molecular-weight polyethylene (XLPE), annealed and remelted, are available. We compared the creep and steady wear rates of 36 matched pairs (72 hips in total) adjusting for baseline characteristics with propensity score matching techniques. Zirconia femoral heads with 26-mm diameter were used in all cases. The femoral-head cup penetration was measured digitally on radiographs. Significantly greater creep ( p=0.006) was detected in the remelted (0.234 mm) than annealed (0.159 mm) XLPE. However, no significant difference ( p=0.19) was found between the steady wear rates (0.003 and 0.008 mm/year, respectively) of the annealed and remelted XLPE. Multiple regression analyses showed that remelted XLPE is significant independent variable ( p<0.001) that is positively associated with creep. However, the patient age and body weight, cup size, the liner thickness, cup inclination, follow-up periods, and postoperative Merle d'Aubigné hip score had no significant effects ( p>0.05) on the steady wear rates. No patients exhibited above the osteolysis threshold of 0.1 mm/year, progressive radiolucencies, osteolysis, or polyethylene fracture. This[U+3000]propensity-matched cohort study document no significant difference in wear resistant performances of annealed and remelted XLPE over an average period of 10 years.

UR - http://www.scopus.com/inward/record.url?scp=84952845581&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84952845581&partnerID=8YFLogxK

U2 - 10.1016/j.jmbbm.2015.12.022

DO - 10.1016/j.jmbbm.2015.12.022

M3 - Article

C2 - 26751705

AN - SCOPUS:84952845581

VL - 59

SP - 99

EP - 107

JO - Journal of the Mechanical Behavior of Biomedical Materials

JF - Journal of the Mechanical Behavior of Biomedical Materials

SN - 1751-6161

ER -