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Volumn 43, Issue 1-2, 2010, Pages 22-28

Long-term in-vitro wear performance of an innovative thermo-compressed cross-linked polyethylene

Author keywords

Conventional UHMWPE; FTIR analysis; Oxidation; PE GUR 1020; PE GUR 1050; Wear

Indexed keywords

ACETABULAR CUP; CALF SERUM; CROSSLINKED POLYETHYLENE; FTIR ANALYSIS; GRAVIMETRIC MEASUREMENTS; HIP SIMULATORS; IN-VITRO; THERMO-COMPRESSION; UHMW-PE; ULTRA-HIGH-MOLECULAR-WEIGHT; WEAR PERFORMANCE; WEAR RATES;

EID: 74249091359     PISSN: 0301679X     EISSN: None     Source Type: Journal    
DOI: 10.1016/j.triboint.2009.04.049     Document Type: Article
Times cited : (15)

References (47)
  • 1
    • 0141447819 scopus 로고    scopus 로고
    • The effects of degree of crosslinking on the fatigue crack initiation and propagation resistance of orthopedic-grade polyethylene
    • Baker D.A., Bellare A., and Pruitt L. The effects of degree of crosslinking on the fatigue crack initiation and propagation resistance of orthopedic-grade polyethylene. J Biomed Mater Res 66A 1 (2003) 146-154
    • (2003) J Biomed Mater Res , vol.66 A , Issue.1 , pp. 146-154
    • Baker, D.A.1    Bellare, A.2    Pruitt, L.3
  • 2
    • 18644372774 scopus 로고    scopus 로고
    • Wear mechanisms of untreated and gamma irradiated ultra-high molecular weight polyethylene for total joint replacements
    • Zhou J., and Komvopoulos J. Wear mechanisms of untreated and gamma irradiated ultra-high molecular weight polyethylene for total joint replacements. J Tribology 127 2 (2005) 273-279
    • (2005) J Tribology , vol.127 , Issue.2 , pp. 273-279
    • Zhou, J.1    Komvopoulos, J.2
  • 3
    • 0032775639 scopus 로고    scopus 로고
    • Advances in the processing sterilization, and crosslinking of ultra-high molecular weight polyethylene for total joint arthroplasty
    • Kurtz S.M., Muratoglu O.K., Evans M., and Edidin A.A. Advances in the processing sterilization, and crosslinking of ultra-high molecular weight polyethylene for total joint arthroplasty. Biomaterials 20 (1999) 1659-1688
    • (1999) Biomaterials , vol.20 , pp. 1659-1688
    • Kurtz, S.M.1    Muratoglu, O.K.2    Evans, M.3    Edidin, A.A.4
  • 5
    • 0036743025 scopus 로고    scopus 로고
    • Ultra high molecular-weight polyethylene (UHMWPE) in total knee replacement: fabrication, sterilisation and wear
    • Blunn G., Brach del Prever E.M., Costa L., Fisher J., and Freeman M.A.R. Ultra high molecular-weight polyethylene (UHMWPE) in total knee replacement: fabrication, sterilisation and wear. J Bone Joint Surg Br 84-B (2002) 946-949
    • (2002) J Bone Joint Surg Br , vol.84 -B , pp. 946-949
    • Blunn, G.1    Brach del Prever, E.M.2    Costa, L.3    Fisher, J.4    Freeman, M.A.R.5
  • 6
    • 74249098987 scopus 로고    scopus 로고
    • The UHMWPE handbook: Ultra-high molecular weight polyethylene in total joint replacement
    • Jacob JJ. The UHMWPE handbook: ultra-high molecular weight polyethylene in total joint replacement. J Bone Joint Surg Am 2005:87-1906.
    • (2005) J Bone Joint Surg Am , pp. 87-1906
    • Jacob, J.J.1
  • 7
    • 0028102058 scopus 로고
    • Post-iIrradiation aging of ultra-high molecular weight polyethylene
    • Rimnac C.M., Klein R.W., Betts F., and Wright T.M. Post-iIrradiation aging of ultra-high molecular weight polyethylene. J Bone Joint Surg Am 76 7 (1994) 1052-1056
    • (1994) J Bone Joint Surg Am , vol.76 , Issue.7 , pp. 1052-1056
    • Rimnac, C.M.1    Klein, R.W.2    Betts, F.3    Wright, T.M.4
  • 8
    • 0035117295 scopus 로고    scopus 로고
    • A novel method of crosslinking ultra-high molecular weight polyethylene to improve wear, reduce oxidation and retain mechanical properties
    • Muratoglu O.K., Bragdon C.R., O'Connor D.A., Jasty M., and Harris W.H. A novel method of crosslinking ultra-high molecular weight polyethylene to improve wear, reduce oxidation and retain mechanical properties. J Arthroplasty 16 (2001) 149-160
    • (2001) J Arthroplasty , vol.16 , pp. 149-160
    • Muratoglu, O.K.1    Bragdon, C.R.2    O'Connor, D.A.3    Jasty, M.4    Harris, W.H.5
  • 9
    • 0029725748 scopus 로고    scopus 로고
    • Mechanistic and morphological origins of ultra-high molecular weight polyethylene wear debris in total joint replacement prostheses
    • Wang A., Stark C., and Dumbleton J.H. Mechanistic and morphological origins of ultra-high molecular weight polyethylene wear debris in total joint replacement prostheses. Proc Inst Mech Eng H 210 (1996) 141-155
    • (1996) Proc Inst Mech Eng H , vol.210 , pp. 141-155
    • Wang, A.1    Stark, C.2    Dumbleton, J.H.3
  • 10
    • 0041386214 scopus 로고    scopus 로고
    • Polyethylene cross-linking by two different methods reduces acetabular liner wear in a hip joint wear simulator
    • D'Lima D.D., Hermida J.C., Chen P.C., Clifford W., and Colwell J. Polyethylene cross-linking by two different methods reduces acetabular liner wear in a hip joint wear simulator. J Orthop Res 21 (2003) 761-766
    • (2003) J Orthop Res , vol.21 , pp. 761-766
    • D'Lima, D.D.1    Hermida, J.C.2    Chen, P.C.3    Clifford, W.4    Colwell, J.5
  • 11
    • 0032927112 scopus 로고    scopus 로고
    • Development of an extremely wear-resistant ultra high molecular weight polyethylene for total hip replacements
    • McKellop H., Shen F.W., Lu B., Campbell P., and Salovey R. Development of an extremely wear-resistant ultra high molecular weight polyethylene for total hip replacements. J Orthop Res 17 (1999) 157-167
    • (1999) J Orthop Res , vol.17 , pp. 157-167
    • McKellop, H.1    Shen, F.W.2    Lu, B.3    Campbell, P.4    Salovey, R.5
  • 14
    • 0002030035 scopus 로고    scopus 로고
    • Wear of gamma radiation crosslinked PE acetabular cups after aging and against roughened femoral heads
    • Mc Kellop H., Di Maio W., Shen F.W., and Lu B. Wear of gamma radiation crosslinked PE acetabular cups after aging and against roughened femoral heads. EORS 1999 (1999) 76
    • (1999) EORS , vol.1999 , pp. 76
    • Mc Kellop, H.1    Di Maio, W.2    Shen, F.W.3    Lu, B.4
  • 15
    • 0141993638 scopus 로고    scopus 로고
    • Clinical performance of a highly cross-linked polyethylene at two years in total hip arthroplasty: a randomized prospective trial
    • Martell J.M., Verner J.J., and Incavo S.J. Clinical performance of a highly cross-linked polyethylene at two years in total hip arthroplasty: a randomized prospective trial. J Arthroplasty 18 (2003) 55-59
    • (2003) J Arthroplasty , vol.18 , pp. 55-59
    • Martell, J.M.1    Verner, J.J.2    Incavo, S.J.3
  • 16
    • 0033637708 scopus 로고    scopus 로고
    • Effect of sterilization method and other modifications on the wear resistance of acetabular cups made of ultra-high molecular weight polyethylene. A hip-simulator study
    • McKellop H., Shen F.W., Lu B., Campbell P., and Salovey R. Effect of sterilization method and other modifications on the wear resistance of acetabular cups made of ultra-high molecular weight polyethylene. A hip-simulator study. J Bone Joint Surg Am 82-A 12 (2000) 1708-1725
    • (2000) J Bone Joint Surg Am , vol.82 -A , Issue.12 , pp. 1708-1725
    • McKellop, H.1    Shen, F.W.2    Lu, B.3    Campbell, P.4    Salovey, R.5
  • 17
    • 0036116447 scopus 로고    scopus 로고
    • Comparison of wear, wear debris and functional biological activity of moderately crosslinked and non-crosslinked polyethylenes in hip prostheses
    • Endo M., Tipper J.L., Barton D.C., Stone M.H., Ingham E., and Fisher J. Comparison of wear, wear debris and functional biological activity of moderately crosslinked and non-crosslinked polyethylenes in hip prostheses. Proc Inst Mech Eng H 216 2 (2002) 111-122
    • (2002) Proc Inst Mech Eng H , vol.216 , Issue.2 , pp. 111-122
    • Endo, M.1    Tipper, J.L.2    Barton, D.C.3    Stone, M.H.4    Ingham, E.5    Fisher, J.6
  • 18
    • 0001486818 scopus 로고
    • Long term clinical results of THR: Clinical results of THR of an alumina head with a cross-linked UHMWPE cup
    • Oonishi H. Long term clinical results of THR: clinical results of THR of an alumina head with a cross-linked UHMWPE cup. Orthop Surg Traumatol 1995:1255-63.
    • (1995) Orthop Surg Traumatol , pp. 1255-1263
    • Oonishi, H.1
  • 19
    • 0032922181 scopus 로고    scopus 로고
    • Low-friction arthroplasty of the hip using alumina ceramic and cross-linked polyethylene. A ten-year follow-up report
    • Wroblewski B.M., Siney P.D., and Fleming P.A. Low-friction arthroplasty of the hip using alumina ceramic and cross-linked polyethylene. A ten-year follow-up report. J Bone Joint Surg Br 8 (1999) 54-55
    • (1999) J Bone Joint Surg Br , vol.8 , pp. 54-55
    • Wroblewski, B.M.1    Siney, P.D.2    Fleming, P.A.3
  • 20
    • 0032927112 scopus 로고    scopus 로고
    • Development of an extremely wear-resistant ultra-high molecular weight polyethylene for total hip replacements
    • McKellop H.A., Shen F.W., and Lu B. Development of an extremely wear-resistant ultra-high molecular weight polyethylene for total hip replacements. J Orthop Res 17 (1999) 157-167
    • (1999) J Orthop Res , vol.17 , pp. 157-167
    • McKellop, H.A.1    Shen, F.W.2    Lu, B.3
  • 21
    • 0029887658 scopus 로고    scopus 로고
    • Prospective clinical and joint simulator studies of a new total hip arthroplasty using alumina ceramic heads and cross-linked polyethylene cups
    • Wroblewski B.M., Siney P.D., Dowson D., and Collins S.N. Prospective clinical and joint simulator studies of a new total hip arthroplasty using alumina ceramic heads and cross-linked polyethylene cups. J Bone Joint Surg 78 B (1996) 280-285
    • (1996) J Bone Joint Surg , vol.78 , Issue.B , pp. 280-285
    • Wroblewski, B.M.1    Siney, P.D.2    Dowson, D.3    Collins, S.N.4
  • 22
    • 10644277228 scopus 로고    scopus 로고
    • Wear behaviour of cross-linked polyethylene assessed in vitro under severe conditions
    • Affatato S., Bersaglia G., Rocchi M., Taddei P., Fagnano C., and Toni A. Wear behaviour of cross-linked polyethylene assessed in vitro under severe conditions. Biomaterials 26 (2005) 3259-3267
    • (2005) Biomaterials , vol.26 , pp. 3259-3267
    • Affatato, S.1    Bersaglia, G.2    Rocchi, M.3    Taddei, P.4    Fagnano, C.5    Toni, A.6
  • 23
    • 0036381521 scopus 로고    scopus 로고
    • Gamma irradiation alters fatigue crack behavior and fracture toughness in 1900 H and GUR 1050 UHMWPE
    • Cole J.C., Lemons J.E., and Eberhardt A.W. Gamma irradiation alters fatigue crack behavior and fracture toughness in 1900 H and GUR 1050 UHMWPE. J Biomed Mater Res (Appl Biomater) 63 (2002) 559-566
    • (2002) J Biomed Mater Res (Appl Biomater) , vol.63 , pp. 559-566
    • Cole, J.C.1    Lemons, J.E.2    Eberhardt, A.W.3
  • 24
    • 26444582223 scopus 로고    scopus 로고
    • Impingement of acetabular cups in a hip simulator comparison of highly cross-linked and conventional polyethylene
    • Holley K.G., Furman B.D., Babalola O.M., Lipman J.D., Padgett D.E., and Wright T.M. Impingement of acetabular cups in a hip simulator comparison of highly cross-linked and conventional polyethylene. J Arthroplasty 220 7 (2005) 77-86
    • (2005) J Arthroplasty , vol.220 , Issue.7 , pp. 77-86
    • Holley, K.G.1    Furman, B.D.2    Babalola, O.M.3    Lipman, J.D.4    Padgett, D.E.5    Wright, T.M.6
  • 25
    • 0033178826 scopus 로고    scopus 로고
    • Optical analysis of surface changes on early retrievals of highly cross-linked and conventional polyethylene tibial inserts
    • Muratoglu O.K., Bragdon C.R., O'Connor D.O., Jasty M., Harris W.H., Gul R., et al. Optical analysis of surface changes on early retrievals of highly cross-linked and conventional polyethylene tibial inserts. Biomaterials 20 (1999) 1463-1470
    • (1999) Biomaterials , vol.20 , pp. 1463-1470
    • Muratoglu, O.K.1    Bragdon, C.R.2    O'Connor, D.O.3    Jasty, M.4    Harris, W.H.5    Gul, R.6
  • 27
    • 43449134991 scopus 로고    scopus 로고
    • Comparative study on the wear behaviour of different conventional and cross-linked polyethylenes for total hip replacement
    • Affatato S., Zavalloni M., Taddei P., Di Foggia M., Fagnano C., and Viceconti M. Comparative study on the wear behaviour of different conventional and cross-linked polyethylenes for total hip replacement. Tribology Int 41 (2008) 813-822
    • (2008) Tribology Int , vol.41 , pp. 813-822
    • Affatato, S.1    Zavalloni, M.2    Taddei, P.3    Di Foggia, M.4    Fagnano, C.5    Viceconti, M.6
  • 28
    • 0036888509 scopus 로고    scopus 로고
    • The performance of gamma- and EtO-sterilised UHMWPE acetabular cups tested under severe simulator conditions. Part 1: Role of third-body wear process
    • Affatato S, Bersaglia G, Foltran I, Taddei P, Fini G, Toni A. The performance of gamma- and EtO-sterilised UHMWPE acetabular cups tested under severe simulator conditions. Part 1: role of third-body wear process. Biomaterials 2002;23:4839-46.
    • (2002) Biomaterials , vol.23 , pp. 4839-4846
    • Affatato, S.1    Bersaglia, G.2    Foltran, I.3    Taddei, P.4    Fini, G.5    Toni, A.6
  • 29
    • 0034923905 scopus 로고    scopus 로고
    • Isolation and morphological characterisation of UHMWPE wear debris generated in vitro
    • Affatato S., Fernandez B., Tucci A., Esposito L., and Toni A. Isolation and morphological characterisation of UHMWPE wear debris generated in vitro. Biomaterials 22 (2001) 2325-2331
    • (2001) Biomaterials , vol.22 , pp. 2325-2331
    • Affatato, S.1    Fernandez, B.2    Tucci, A.3    Esposito, L.4    Toni, A.5
  • 30
    • 0033800071 scopus 로고    scopus 로고
    • Surface morphology and wear mechanisms of four clinically relevant biomaterials after hip simulator testing
    • Kurtz S.M., Muhlstein C.L., and Edidin A.A. Surface morphology and wear mechanisms of four clinically relevant biomaterials after hip simulator testing. J Biomed Mater Res 52 3 (2000) 447-459
    • (2000) J Biomed Mater Res , vol.52 , Issue.3 , pp. 447-459
    • Kurtz, S.M.1    Muhlstein, C.L.2    Edidin, A.A.3
  • 31
    • 0037086743 scopus 로고    scopus 로고
    • Effects of the sterilisation method on the wear of the UHMWPE acetabular cups tested in a hip joint simulator
    • Affatato S., Bordini B., Fagnano C., Taddei P., Tinti A., and Toni A. Effects of the sterilisation method on the wear of the UHMWPE acetabular cups tested in a hip joint simulator. Biomaterials 23 (2002) 1439-1446
    • (2002) Biomaterials , vol.23 , pp. 1439-1446
    • Affatato, S.1    Bordini, B.2    Fagnano, C.3    Taddei, P.4    Tinti, A.5    Toni, A.6
  • 32
    • 0037813128 scopus 로고    scopus 로고
    • The performance of gamma- and EtO-sterilised UHMWPE acetabular cups tested under severe simulator conditions. Part 2: wear particle characteristics with isolation protocols
    • Affatato S., Bersaglia G., Emiliani D., Foltran I., Taddei P., Reggiani M., et al. The performance of gamma- and EtO-sterilised UHMWPE acetabular cups tested under severe simulator conditions. Part 2: wear particle characteristics with isolation protocols. Biomaterials 24 (2003) 4045-4055
    • (2003) Biomaterials , vol.24 , pp. 4045-4055
    • Affatato, S.1    Bersaglia, G.2    Emiliani, D.3    Foltran, I.4    Taddei, P.5    Reggiani, M.6
  • 33
    • 33746403401 scopus 로고    scopus 로고
    • The predictive power of surface profile parameters on the amount of wear measured in vitro on metal-on-polyethylene artificial hip joints
    • Affatato S., Bersaglia G., Junqiang Y., Traina F., Toni A., and Viceconti M. The predictive power of surface profile parameters on the amount of wear measured in vitro on metal-on-polyethylene artificial hip joints. Proc Inst Mech Eng H 220 3 (2006) 457-464
    • (2006) Proc Inst Mech Eng H , vol.220 , Issue.3 , pp. 457-464
    • Affatato, S.1    Bersaglia, G.2    Junqiang, Y.3    Traina, F.4    Toni, A.5    Viceconti, M.6
  • 34
    • 3042585658 scopus 로고
    • Further experimental designs
    • Armitage P., and Berry G. (Eds), Blackwell Scientific publications, Oxford
    • Armitage P., and Berry G. Further experimental designs. In: Armitage P., and Berry G. (Eds). Statistical methods in medical research. 3rd ed (1992), Blackwell Scientific publications, Oxford 251-259
    • (1992) Statistical methods in medical research. 3rd ed , pp. 251-259
    • Armitage, P.1    Berry, G.2
  • 35
    • 0034975691 scopus 로고    scopus 로고
    • Effects of microtoming on oxidation of ultra high molecular weight polyethylene
    • Jacobson K., Costa L., Bracco P., Augustsson N., and Stenberg B. Effects of microtoming on oxidation of ultra high molecular weight polyethylene. Polym Deg Stab 73 (2001) 141-150
    • (2001) Polym Deg Stab , vol.73 , pp. 141-150
    • Jacobson, K.1    Costa, L.2    Bracco, P.3    Augustsson, N.4    Stenberg, B.5
  • 36
    • 0026840153 scopus 로고    scopus 로고
    • Gamma-, photo- and thermally-initiated oxidation of linear low density polyethylene: a quantitative comparison of oxidation products
    • Lacoste J., and Carlsson D.J. Gamma-, photo- and thermally-initiated oxidation of linear low density polyethylene: a quantitative comparison of oxidation products. J Polym Sci Part A Poly Chem 30 (1992) 493-500
    • (1992) J Polym Sci Part A Poly Chem , vol.30 , pp. 493-500
    • Lacoste, J.1    Carlsson, D.J.2
  • 37
    • 0026840153 scopus 로고    scopus 로고
    • Gamma-, photo-, and thermally-initiated oxidation of linear low density polyethylene: a quantitative comparison of oxidation products
    • Lacoste J., and Carlsson D.J. Gamma-, photo-, and thermally-initiated oxidation of linear low density polyethylene: a quantitative comparison of oxidation products. J Polym Sci Part A Poly Chem 30 3 (2003) 493-500
    • (2003) J Polym Sci Part A Poly Chem , vol.30 , Issue.3 , pp. 493-500
    • Lacoste, J.1    Carlsson, D.J.2
  • 40
    • 33745727024 scopus 로고    scopus 로고
    • A survey of oxidation and oxidation potential in contemporary packaging for polyethylene total joint replacement components
    • Costa L., Bracco P., Brach del Prever E.M., Kurtz M., and Gallinaro P. A survey of oxidation and oxidation potential in contemporary packaging for polyethylene total joint replacement components. J of Biomed Mat Res Part B: Appl Biomater 78B (2006) 20-26
    • (2006) J of Biomed Mat Res Part B: Appl Biomater , vol.78 B , pp. 20-26
    • Costa, L.1    Bracco, P.2    Brach del Prever, E.M.3    Kurtz, M.4    Gallinaro, P.5
  • 41
    • 0009612263 scopus 로고    scopus 로고
    • Wear mechanisms and wear testing of ultra-high molecular weight polyethylene in total joint replacements
    • Society for Biomaterials, Minneapolis, USA;
    • Wang A, Essner A, Polineni V, Sun D, Stark C, Dumbleton J. Wear mechanisms and wear testing of ultra-high molecular weight polyethylene in total joint replacements. In: Polyethylene wear in orthopaedic implants workshop. Society for Biomaterials, 1997; Minneapolis, USA; 1997. p. 4-18.
    • (1997) Polyethylene wear in orthopaedic implants workshop , pp. 4-18
    • Wang, A.1    Essner, A.2    Polineni, V.3    Sun, D.4    Stark, C.5    Dumbleton, J.6
  • 42
    • 0030903723 scopus 로고    scopus 로고
    • Wear of polyethylene acetabular components in total hip arthroplasty. An analysis of one hundred and twenty-eight components retrieved at autopsy or revision operations
    • Jasty M., Goetz D.D., Bragdon C.R., Lee K.R., Hanson A.E., Elder J.R., et al. Wear of polyethylene acetabular components in total hip arthroplasty. An analysis of one hundred and twenty-eight components retrieved at autopsy or revision operations. J Bone Joint Surg Am 79 3 (1997) 349-358
    • (1997) J Bone Joint Surg Am , vol.79 , Issue.3 , pp. 349-358
    • Jasty, M.1    Goetz, D.D.2    Bragdon, C.R.3    Lee, K.R.4    Hanson, A.E.5    Elder, J.R.6
  • 43
    • 33845510652 scopus 로고    scopus 로고
    • Highly cross-linked polyethylene in total hip arthroplasty
    • Gordon A.C., D'Lima D.D., and Colwell C.W. Highly cross-linked polyethylene in total hip arthroplasty. J Am Acad Orthop Surg 14 9 (2006) 511-523
    • (2006) J Am Acad Orthop Surg , vol.14 , Issue.9 , pp. 511-523
    • Gordon, A.C.1    D'Lima, D.D.2    Colwell, C.W.3
  • 44
    • 0032773847 scopus 로고    scopus 로고
    • Plasticity-induced damage layer is a precursor to wear in radiation-cross-linked UHMWPE acetabular components for total hip replacement
    • Edidin A.A., Pruitt L., Jewett C.W., Crane D.J., Roberts D., and Kurtz S.M. Plasticity-induced damage layer is a precursor to wear in radiation-cross-linked UHMWPE acetabular components for total hip replacement. J Arthroplasty 14 5 (1999) 616-627
    • (1999) J Arthroplasty , vol.14 , Issue.5 , pp. 616-627
    • Edidin, A.A.1    Pruitt, L.2    Jewett, C.W.3    Crane, D.J.4    Roberts, D.5    Kurtz, S.M.6
  • 45
    • 0036434749 scopus 로고    scopus 로고
    • J-Integral fracture toughness and tearing modulus measurement of radiation cross-linked UHMWPE
    • Gomoll A., Wanich T., and Bellare A. J-Integral fracture toughness and tearing modulus measurement of radiation cross-linked UHMWPE. J Orthop Res 20 (2002) 1152-1156
    • (2002) J Orthop Res , vol.20 , pp. 1152-1156
    • Gomoll, A.1    Wanich, T.2    Bellare, A.3
  • 47
    • 0033868418 scopus 로고    scopus 로고
    • Femoral prosthetic heads and their significance in polyethylene wear
    • Falez F., La Cava F., and Panegrossi G. Femoral prosthetic heads and their significance in polyethylene wear. Int Orthop 24 (2000) 126-129
    • (2000) Int Orthop , vol.24 , pp. 126-129
    • Falez, F.1    La Cava, F.2    Panegrossi, G.3


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