VERILAST Oxidized Zirconium with XLPE

Transcription

1 Figure HT25: Cumulative Percent Revision of Primary Total Conventional Hip Replacement by Bearing Surface (Primary Diagnosis OA) Cumulative Percent Revision Ceramic/Ceramic Ceramic/Non Cross-Linked Polyethylene Ceramic/Cross-Linked Polyethylene Metal/Metal Metal/Non Cross-Linked Polyethylene Metal/Cross-Linked Polyethylene Ceramicised Metal/Cross-Linked Polyethylene Years Since Primary Procedure Number at Risk Ceramic/Ceramic Ceramic/Non Cross-Linked Polyethylene Ceramic/Cross-Linked Polyethylene Metal/Metal Metal/Non Cross-Linked Polyethylene Metal/Cross-Linked Polyethylene Ceramicised Metal/Cross-Linked Polyethylene 0 Yrs Yr 3 Yrs 5 Yrs 0 Yrs 2 Yrs Real-Life Results In the 203 Australian Registry, the ceramicized metal/modified polyethylene category, which includes the exclusive OXINIUM alloy from Smith & Nephew, had the highest survivorship of all bearing categories at five years: 98%. Australian Orthopaedic Association National Joint Replacement Registry Annual Report. Adelaide: AOA: 203. Figure has been reproduced in exact and complete form. For a full copy of the AOA National Joint Replacement Registry report, see Although the ceramicised metal/cross-linked polyethylene combination has the lowest reported cumulative percent revision at five years this result should be interpreted with caution (Tables HT22 and HT25). It is the Registry s view that this articulation cannot be compared to other articulations as it has only been used with a small number of femoral stems and acetabular combinations from a single company. The results should not be compared due to the inability to correct for the confounding effect of the limited number of stem/acetabular combinations. 3806, USA Lit. Nr Ed. 05/4

2 CoCrMo Ti64 OxZr Ti64 CoCrMo Head on Ti-6Al-4V Taper OxZr Head on Ti-6Al-4V Taper OxZr Head on Taper OxZr Head on Taper After over five Mcycles of fatigue testing in 3.5 ph solution, the OxZr heads, coupled with Ti-6Al-4V and trunnions, showed the least chemical attack on either the head or the trunnion. Pawar et al., ASMI , USA Lit. Nr Ed. 05/4

3 Cumulative volumetric wear comparison CoCr (32mm) against CPE Average Volume Loss (mm 3 ) CoCr (36mm) against 0-XLPE 80% Reduction in volumetric wear after 7.8 million cycles 67% Reduction in volumetric wear after 45 million cycles 00 0 OxZr (36mm) against 0-XLPE Cycles (million) Wear Performance VERILAST Technology for total hip arthroplasty has been tested and shown to provide superior wear performance compared to CoCrMo on highly-crosslinked polyethelene, for up to 45 million cycles. With advanced materials designed to last, VERILAST Technology helps restore patients to their active lifestyles, allowing joint pain to be addressed earlier. A. Parikh, P. Hill, V. Pawar and J. Sprague, Long-term simulator wear performance of an advanced bearing technology for THA, Orthop Res Soc, San Antionio, TX, Jan 26-29, 203, , USA Lit. Nr Ed. 05/4

4 Corrosion avoidance: Retrieval analysis CoCrMo Retrieval OXINIUM Retrieval 5 year ( ) retrieval analysis Taper damage related to head material CoCrMo heads show more corrosion and corrosion by products compared to OxZr With its biocompatible properties, due to its use of oxidized zirconium, VERILAST Technology has shown to reduce taper corrosion in total hip arthroplasty, minimizing the concern of trunnionosis. This feature makes VERILAST Technology the optimal solution for total hip arthroplasty. Cartner et al ORS 204 and Aldinger et al ISTA , USA Lit. Nr Ed. 05/4

5 Long term in vitro corrosion performance 45 Mcycle wear simulation testing CoCrMo head and associated taper 36mm heads on 2/4 Ti6Al4V taper CoCrMo: Maximum depth of material loss at the taper ranged from 5.8 µm to 35.8 µm OxZr: Depth of material loss at the taper was not measurable Oxidized Zirconium (OXINIUM ) head and associated taper For all OxZr heads, little or no evidence of fretting and corrosion was observed, and the depth of material loss at the taper was not measurable. The results demonstrated that the tapers for the OxZr heads are less susceptive to fretting and corrosion as compared to those for the CoCrMo heads. Li et al OR , USA Lit. Nr Ed. 05/4