Longevity Crosslinked Polyethylene was developed to address the issue of wear in total hip arthroplasty. To help ensure optimal wear resistance, Zimmer Biomet employs a proprietary manufacturing process.
Highly Resistant to Wear6-8
- Proprietary electron beam process delivers 10Mrad dosage for greater crosslinking, resulting in superior long-term polyethylene wear performance compared to conventional polyethylene.
Highly resistant to aging9-11
Melt annealing vs. warm annealing virtually eliminates free radicals. Retrievals up to 10 years in vivo demonstrate no oxidation.
Functions as Intended12
- Millions of Longevity liners implanted since 1999.
- In a seven to ten year follow-up of 247 primary THA's using Zimmer Biomet Highly Crosslinked Liners, femoral head penetration did not increase over time after the first year of implantation using 241 primary THA's using standard polyethylene as the control4
Clinical experience with highly crosslinked polyethylenes has demonstrated a substantial reduction in the rate of wear.2,3 This remarkable process creates a three-dimensional structure that is more resistant to abrasion.4,5
Crosslinking reduced wear rate of polyethylene in laboratory studies.1
Reduction of Debris89%
Compared to standard polyethylene control samples.1
This process creates a three-dimensional structure that is more resistant to abrasion and process a 10-fold wear rate reduction compared to standard polyethylene control samples.1,2 Extensive hip-simulator wear testing has demonstrated the benefits of crosslinking with Longevity Polyethylene.
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- Data on file at Zimmer, Inc.
Oonishi H, Saito M, Kadoya Y. Wear of high-dose gamma irradiated polyethylene in total joint replacement – longterm radiological evaluation. 44th Annual Meeting, Orthopaedic Research Society, March 16-19, 1998.
Wroblewski BM, Siney PD, Fleming PA. Low-friction arthroplasty of the hip using alumina ceramic and crosslinked polyethylene. J Bone Joint Surg (Br). 1999; 81-B: 54-5.
Grobbelaar CJ, DuPlessis TA, Marais F. The radiation improvement of polyethylene prosthesis. J Bone Joint Surg. 1978;60-B(3):370-374.
Oonishi H, Kuno M, Ikada Y, et al. Super low wear crosslinked UHMWPE by heavy high-dose gammaradiation. Proceedings from the 2nd Congress of Hip Section of Western Pacific Orthopaedic Assn. 1996;4.
Teeter, M. et al. Thirteen-year wear rate comparison of highly crosslinked and conventional polyethylene in total hip arthroplasty: long-term follow-up of a prospective randomized controlled trial. Can J Surg. 2017 Jun; 60(3): 212–216
Bragdon, C. et al. Clinical Multicenter Studies of the Wear Performance of Highly Crosslinked Remelted Polyethylene in THA. Clin Orthop Relat Res (2013) 471:393–402.
Longevity Highly Cross-linked Polyethylene Clinical Value Dossier. 97-7255-198-00 Rev.4-4-12 ML. 2012
Bragdon, C. et al., Seven to Ten Year Follow-Up of Highly Crosslinked Polyethylene Liners in Total Hip Arthroplasty, Poster No. 2444, 55th Annual Meeting of the Orthopaedic Research Society, Las Vegas, 2009
Wannomae KK, et al., In vivo oxidation of retrieved crosslinked ultra-high molecular-weight polyethylene acetabular components with residual free radicals, J Arthroplasty. 2006; 21(7): 1005-1011
Kurtz, et al. Reasons for Revision of First-Generation Highly Cross-Linked Polyethylenes. J Arthroplasty. Vol. 25 No. 6 Suppl. 1 2010
Kreider D, Continuum® and Trilogy® IT Acetabular Systems – Clinical Evaluation Report. Document No. CER 30048.4.0. p 71-72, 4-June-2015.