Controlled Zirconia Phase Transformation in BIOLOX® delta — a Feature of Safety

Kuntz, Meinhard; Shneider, N.; Heros, Ricardo

doi:10.1007/3-7985-1540-9_13

Cited by 9 publications

(6 citation statements)

References 5 publications

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“…Alternative ZTA materials have also been developed using cerium oxide as the stabilization additive instead of yttria [157][158][159]. AMC became a special ZTA composition consisting of 24 wt.% ZrO 2 (i.e., 17 vol.%) with 1.7 wt.% mixed oxides (Y 2 O 3 , Cr 2 O 3 , and SrO), the balance being Al 2 O 3 (74 wt.%) [160]. Since its introduction in 2000, AMC has become the most popular orthopaedic ceramic for articulation implants used in the world today.…”

Section: Zirconia Toughened Aluminamentioning

confidence: 99%

“…The metastability of these ZrO 2 -containing materials presents both benefits and risks. Therefore, careful compositional control of the monoclinic content is necessary for enhanced toughness and strength in combination with sufficient hydrothermal resistance, which is seen as a "feature of safety" [160].…”

Section: Shown Inmentioning

confidence: 99%

“…Since its introduction in 2000, AMC has become the most popular orthopaedic ceramic for articulation implants used in the world today. It is commercially known as BIOLOX ® delta [160]. An industrial standard for its composition and testing has been prepared and published [161].…”

Section: Zirconia Toughened Aluminamentioning

confidence: 99%

See 2 more Smart Citations

Ceramics and ceramic coatings in orthopaedics

McEntire

Bal

Rahaman

et al. 2015

Journal of the European Ceramic Society

188

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Section: Zirconia Toughened Aluminamentioning

confidence: 99%

Section: Shown Inmentioning

confidence: 99%

See 1 more Smart Citation

Ceramics and ceramic coatings in orthopaedics

McEntire

Bal

Rahaman

et al. 2015

Journal of the European Ceramic Society

188

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“…The newest generation of BIOLOX delta ceramic bearings was introduced in 2000 by CeramTec AG (Plochingen, Germany). BIOLOX delta is an aluminamatrix composite (AMC) consisting of 81.6% aluminium oxide, 17% yttria-stabilized tetragonal zirconia particles, and traces (1.4%) of chromium dioxide and strontium crystals engineered to increase material density and reduce grain size (less than 0.8 m compared with the grain size of alumina 1-5 m) [14][15][16]. With these improvements, the risk for crack propagation and component fracture was minimized.…”

Section: Introductionmentioning

confidence: 99%

Clinical and Radiological Outcome of the Newest Generation of Ceramic-on-Ceramic Hip Arthroplasty in Young Patients

Reuven

Manoudis

Aoude

et al. 2014

Advances in Orthopedic Surgery

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Ceramic-on-ceramic articulations have become an attractive option for total hip arthroplasty in young patients. In this study, we retrospectively evaluated the short- to midterm clinical and radiographic results in 51 consecutive patients (61 hips) using the newest generation of ceramic implants. Results obtained in our study showed positive clinical and radiological outcomes. Both HHS and UCLA activity scores doubled after surgery and tended to increase over time. There was one infection requiring a two-stage revision and a case of squeaking that began 2 years postoperatively after a mechanical fall. The overall survival rate of the implants was 98.4% at six years with revision for any reason as the end point. Based on these results, fourth generation ceramics offer a viable option for young and active patients.

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“…Despite these treatments to alumina, some problems associated with rim chipping2 and head fracture3 have continued to exist. In the latest development, the introduction of zirconia nano‐particles and other oxides into the alumina matrix (alumina matrix composite, AMC) increased the strength and toughness to levels seen in pure zirconia while preserving stability 4. The key to the improved performance of such materials was the elevated hardness and toughness properties, low surface roughness due to smaller grain sizes and high wettability, which provides better fluid‐film lubrication.…”

Section: Introductionmentioning

confidence: 99%

Effect of cup inclination angle during microseparation and rim loading on the wear of BIOLOX® delta ceramic‐on‐ceramic total hip replacement

et al. 2010

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Ceramic-on-ceramic (CoC) bearings in total hip replacements (THRs) have shown low wear volumes under standard gait in hip simulator studies. However, clinical reports have indicated variations in wear rates and formation of stripe-like wear area on the ceramic femoral heads. The aim of this study was to investigate the influence of cup inclination angle and microseparation on the wear of CoC bearings in THRs. The six station Leeds II Physiological Anatomical Joint Simulator was used to investigate the wear of 28 mm diameter alumina matrix composite ceramic bearings (BIOLOX® delta). It was shown that increasing the cup inclination angle from 55° to 65° had no significant effect on the wear rate of BIOLOX® delta CoC under both standard gait and microseparation conditions in this in vitro study. Under standard gait conditions, the mean wear rate for both cup inclination angle conditions was very low at 0.05 mm(3)/million cycles. The introduction of microseparation to the standard gait cycle increased the mean wear rates to 0.13 mm(3)/million cycles for the cup inclination angle of 55° and 0.11 mm(3)/million cycles for that of 65°. The level of increased wear with microseparation was not dependent on cup angle. A stripe of wear on the head also formed, with corresponding superior rim wear on the cup. The wear rates obtained were low compared to the HIPed third generation alumina ceramic (BIOLOX® forte) tested under the same adverse conditions (1.84 mm(3)/million cycles). BIOLOX® delta has shown lower wear than previous ceramic materials used in THR under adverse conditions.

show abstract

Controlled Zirconia Phase Transformation in BIOLOX® delta — a Feature of Safety

Cited by 9 publications

References 5 publications

Ceramics and ceramic coatings in orthopaedics

Ceramics and ceramic coatings in orthopaedics

Clinical and Radiological Outcome of the Newest Generation of Ceramic-on-Ceramic Hip Arthroplasty in Young Patients

Effect of cup inclination angle during microseparation and rim loading on the wear of BIOLOX® delta ceramic‐on‐ceramic total hip replacement

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