Oxidized Zirconium Femoral Components Reduce Polyethylene Wear in a Knee Wear Simulator

Ezzet, Kace A.; Hermida, Juan C.; Colwell, Clifford W.; D’Lima, Darryl D.

doi:10.1097/01.blo.0000148576.70780.13

Cited by 102 publications

(56 citation statements)

References 13 publications

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“…Each author certifies that his or her institution has approved the human protocol for this investigation, that all investigations were conducted in conformity with ethical principles of research, and that informed consent for participation in the study was obtained. PE inserts by approximately 42% compared with identical femoral components made of a Co-Cr alloy [6]. Furthermore, the friction between cartilage articulating this material and a metallic femoral trochlear surface, a situation that occurs when the patella is not resurfaced during TKA, has been studied.…”

Section: Introductionmentioning

confidence: 99%

The 5-year Results of an Oxidized Zirconium Femoral Component for TKA

Innocenti

Civinini

Carulli

et al. 2010

Clinical Orthopaedics &Amp; Related Research

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Section: Introductionmentioning

confidence: 99%

The 5-year Results of an Oxidized Zirconium Femoral Component for TKA

Innocenti

Civinini

Carulli

et al. 2010

Clinical Orthopaedics &Amp; Related Research

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“…Although it has been claimed TKAs with an OxZr femoral knee component produced less polyethylene wear [8,9,11] than those with a Co-Cr femoral knee component, these findings have not been well demonstrated clinically. We examined polyethylene wear particles in synovial fluid and compared the weight, size, and shape of polyethylene particles in knees with an OxZr femoral component with those in knees with a Co-Cr femoral component.…”

Section: Discussionmentioning

confidence: 94%

“…Many authors reported reduction in polyethylene wear rates in a knee wear simulator of 42% to 89% in knees with an OxZr femoral component compared with knees with a Co-Cr femoral component [9,29,30,34] (Table 7). Kobayashi et al [16] observed there was no correlation between the presence or absence of osteolysis and the morphologic features of the particles present.…”

Section: Discussionmentioning

confidence: 99%

“…The resulting material (oxidized zirconium or OxZr) of total knee prostheses maintains the strength of the metal zirconium core yet provides the benefit of a ceramic articulating surface. Preliminary studies of this material using wear machines have reported reduction in polyethylene wear rates of 42% to 89% compared with cobaltchrome (Co-Cr) [9,11,30]. It also has been reported there was a more rapid return of flexion and regaining functional milestones in the group of patients with OxZr femoral knee components [18,19].…”

Section: Introductionmentioning

confidence: 97%

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Weight of Polyethylene Wear Particles is Similar in TKAs with Oxidized Zirconium and Cobalt-chrome Prostheses

Kim

Huh

et al. 2010

Clinical Orthopaedics &Amp; Related Research

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Background The greater lubricity and resistance to scratching of oxidized zirconium femoral components are expected to result in less polyethylene wear than cobaltchrome femoral components. Questions/purposes We examined polyethylene wear particles in synovial fluid and compared the weight, size (equivalent circle diameter), and shape (aspect ratio) of polyethylene wear particles in knees with an oxidized zirconium femoral component with those in knees with a cobalt-chrome femoral component. Patients and Methods One hundred patients received an oxidized zirconium femoral component in one knee and a cobalt-chrome femoral component in the other. There were 73 women and 27 men with a mean age of 55.6 years (range, 44-60 years). The minimum followup was 5 years (mean, 5.5 years; range, 5-6 years). Polyethylene wear particles were analyzed using thermogravimetric methods and scanning electron microscopy. Results The weight of polyethylene wear particles produced at the bearing surface was 0.0223 ± 0.0054 g in 1 g synovial fluid in patients with an oxidized zirconium femoral component and 0.0228 ± 0.0062 g in patients with a cobalt-chrome femoral component. Size and shape of polyethylene wear particles were 0.59 ± 0.05 lm and 1.21 ± 0.24, respectively, in the patients with an oxidized zirconium femoral component and 0.52 ± 0.03 lm and 1.27 ± 0.31, respectively, in the patients with a cobaltchrome femoral component. Knee Society knee and function scores, radiographic results, and complication rate were similar between the knees with an oxidized zirconium and cobalt-chrome femoral component. Conclusions The weight, size, and shape of polyethylene wear particles were similar in the knees with an oxidized zirconium and a cobalt-chrome femoral component. We found the theoretical advantages of this surface did not provide the actual advantage. Level of Evidence Level I, therapeutic study. See the guidelines for Authors for a complete description of levels of evidence.

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“…Preliminary studies in vitro have indicated excellent mechanical properties for this material with a high resistance to roughening and a reduction of PE wear when compared to cobaltchromium (CoCr) femoral component for total knee replacement [2][3][4]18]. However, it is well known that preclinical laboratory testing of materials has limitations, sometimes leading to catastrophic failure, and that proof for all new technologies must come from clinical trials.…”

Section: Introductionmentioning

confidence: 99%

Clinical Results of Oxidized Zirconium Femoral Component in TKA. A Review of Long-Term Survival

et al. 2016

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Background: Oxidized zirconium (OxZr) femoral component for total knee arthroplasty (TKA) have been introduced in an attempt to reduce polyethylene wear and secondary osteolysis and improve longevity of implants. Questions/Purposes: We reviewed clinical studies in literature evaluating OxZr femoral component for TKA. The aim of this review was to evaluate the clinical outcome and survival rate of TKA with an OxZr femoral component. Methods: A review of the existing literature was undertaken to collect data on the OxZr femoral component in order to provide a better understanding of its performance. Of 34 studies published in the literature, 8 met the eligibility criteria and were included in the final analysis. Results: Findings indicated that the mean Knee Society knee score improved in all series from preoperative to postoperative evaluation. The postoperative Knee Society knee score reported range from 84 to 95 and mean postoperative Knee Society functional score range from 74 to 90. The revision rate with this implant is low with up to 12.6 years of follow-up, with three revisions in total. The survival rate ranged from 100-98.7% at 5-7 years to 97.8% at 10 years. Conclusions: Excellent clinical outcome and high survival rate has been demonstrated for OxZr femoral component in TKA. No adverse reaction has been described for this new material.

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Oxidized Zirconium Femoral Components Reduce Polyethylene Wear in a Knee Wear Simulator

Cited by 102 publications

References 13 publications

The 5-year Results of an Oxidized Zirconium Femoral Component for TKA

The 5-year Results of an Oxidized Zirconium Femoral Component for TKA

Weight of Polyethylene Wear Particles is Similar in TKAs with Oxidized Zirconium and Cobalt-chrome Prostheses

Clinical Results of Oxidized Zirconium Femoral Component in TKA. A Review of Long-Term Survival

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