Fracture toughness, strength and slow crack growth in a ceria stabilized zirconia–alumina nanocomposite for medical applications

Benzaid, Rajaa; Chevalier, Jérôme; Saâdaoui, Malika; Fantozzi, Gilbert; Nawa, Masahiro; Díaz, Luis A.; Torrecillas, Ramón

doi:10.1016/j.biomaterials.2008.05.021

Cited by 187 publications

(108 citation statements)

References 24 publications

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“…AMCs, also known as fourth-generation ceramics, provide superior strength with fracture toughness and allow manufacturing thinner liners with larger heads compared with earlier ceramic materials [1,4]. Although these material improvements would be expected to decrease clinical concerns associated with previous-generation alumina bearings such as ceramic fracture and squeaking, little is known about this new bearing material and intermediateterm effects are unclear [7,15,27].…”

Section: Discussionmentioning

confidence: 99%

“…These limitations of pure alumina characteristics required the development of improved ceramic materials. The alumina matrix composite (AMC) material, Delta ceramics (CeramTec 1 , Plochingen, Germany), has been reported to increase ceramic strength with fracture toughness over previous pure alumina in the laboratory setting and thus to allow manufacturing thinner acetabular liners and consequent larger heads [1,4]. Theoretically, these material improvements would be expected to decrease mentioned concerns associated with previousgeneration alumina bearings.…”

Section: Introductionmentioning

confidence: 99%

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Do Alumina Matrix Composite Bearings Decrease Hip Noises and Bearing Fractures at a Minimum of 5 Years After THA?

Baek

Kim

et al. 2015

Clinical Orthopaedics &Amp; Related Research

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Background Ceramic-on-ceramic bearing couples are theoretically attractive in total hip arthroplasty (THA) because of low wear, but concerns regarding ceramic fracture and squeaking have arisen. Improved material properties of newer alumina matrix composite (AMC) materials, known as Delta ceramics, may reduce these risks. In addition, the use of thinner liners and larger femoral heads may be helpful clinically to lower the rate of dislocation. However, limited short-term clinical results are available and intermediate-term effects are unclear. Questions/purposes (1) What is the frequency of bearingrelated complications (dissociation, fracture, and noise) with ceramic-on-ceramic AMC bearings in cementless THA? (2) What other complications arose in patients treated with these bearings? (3) What are the Harris hip scores (HHS) and survivorship free from reoperation and revision at a minimum of 5 years after cementless THA performed with AMC bearings? Methods Over a 9-month period in 2009, one surgeon performed 125 THAs, of which 100 (80% of the total) were performed with cementless, AMC bearings. During the period in question, the exclusion criteria for this implant were primary THAs with severe acetabular or femoral bone defect and revision THAs. Of these, 94 hips (95%) in 91 patients were available for analysis at a minimum of 5 years (range, 5-6 years), because five patients (six hips) had died. Mean age at the time of arthroplasty was 55 ± 14 years. Prostheses with an identical design and Biolox 1 Delta ceramics were used in all patients. Noise was classified into squeaking, clicking, grinding, and popping. Ceramic fracture, dislocation, and any other complications associated with the use of AMC ceramics were also investigated. Clinical evaluation included the modified HHS preoperatively and at each followup. Survivorship free from reoperation and revision was calculated using the Kaplan-Meier method. Results Of 91 patients, four developed bearing-related complications, including one with liner dissociation despite initial square seating and three with clicking. No patients had ceramic fractures. A single event of perioperative dislocation occurred in one patient and postoperative periprosthetic fracture occurred in two hips. Mean HHS improved from 56 to 93 points at the final followup (p \ 0.001). Survivorship at 5 years free from reoperation and revision was 96.8% and 97.9%, respectively.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Do Alumina Matrix Composite Bearings Decrease Hip Noises and Bearing Fractures at a Minimum of 5 Years After THA?

Baek

Kim

et al. 2015

Clinical Orthopaedics &Amp; Related Research

View full text Add to dashboard Cite

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“…The exact procedure is described in detail in. 21), 22) The polished samples and the fracture faces resulting from ISB tests were investigated by XRD in the 2theta range between 2733°(Bruker D8, Germany, graphite monochromator, Cu K¡-radiation) to determine the transformability and transformation zone depth. The area of the monoclinic (111) and (-111) as well as the tetragonal (101) reflexes was integrated and the monoclinic content was calculated according to the calibration curve of Toraya.…”

Section: Methodsmentioning

confidence: 99%

Tough to brittle transition with increasing grain size in 3Yb-TZP ceramics manufactured from stabilizer coated nanopowder

Kern¹,

Gadow²

2016

J. Ceram. Soc. Japan

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Tetragonal zirconia polycrystals (TZP) are ceramics combining high strength and fracture resistance which are applied in biomedical and engineering applications. In this study, a nanoscale monoclinic zirconia nanopowder was coated with 3 mol-% ytterbia via a wet chemical route. The powders obtained after calcination and milling were consolidated into dense samples by hot pressing at 12751500°C for 1 h at 50 MPa axial pressure. Microstructure phase composition and mechanical properties were determined. The materials were initially very fine grained and showed grain growth starting at sintering temperatures exceeding 1350°C. At low sintering temperatures bending strength values of 10001100 MPa were recorded along with high fracture resistance of >10 MPa√m. In the sintering temperature range between 13501375°C, a steep decline of toughness to a level of 6 MPa√m was observed. This decline in fracture resistance is accompanied by a drop in transformability of the tetragonal phase and grain growth. While TZP from coprecipitated powders tend to become tougher with sintering temperature and increasing grain size, materials from stabilizer coated powders showed an adverse tendency. The tough to brittle transition in the 3Yb-TZP studied was attributed to the elimination of the initial stabilizer concentration gradient in the tetragonal grains.

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“…Zirconia-alumina nanomaterials amongst other advanced ceramics show superior mechanical properties, chemical inertness and biocompatibility. They are used for a wide range of applications such as biomedical implants [14,15] and structural ceramics [16,17].…”

Section: Introductionmentioning

confidence: 99%

Thermal and physical properties of ZrO2–AlO(OH) nanopowders synthesised by microwave hydrothermal method

Koltsov

Prześniak-Welenc

Wojnarowicz

et al. 2017

J Therm Anal Calorim

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Industrially relevant nanopowder was synthesised by microwave hydrothermal synthesis to obtain wellcontrolled composition (ZrO 2 -AlO(OH) system) which was found to determine a number of physical and thermal characteristics. This study reports variation of particle size, density, specific surface area (SSA BET ), as well as thermal behaviour of nanopowder mixtures of ZrO 2 -AlO(OH) in the whole range of compositions. It was found that the onset temperature (T on ) of physically and chemically bounded water desorption depends on the Al 3? /or AlO(OH) content. The lower content of Al 3? in the ZrO 2 -AlO(OH) system, the higher T on of physically bound water desorption. There are three distinct temperature regions for water decomposition for nanomaterials investigated in air (at approximately 50, 250 and 450°C). These temperature ranges depend on particle size and chemical composition of ZrO 2 -AlO(OH) nanopowders. Materials were divided into three groups characterised by different properties: (1) ZrO 2 with 2-12% of Al 3? , where particle sizes are from 4 to 8 nm, (2) ZrO 2 with 30-67% of AlO(OH), where particle sizes are from 10 to 13 nm, and (3) ZrO 2 with 80-99% of AlO(OH), where particle sizes are from 13 to 23 nm. AlO(OH) content determines thermal and physico-chemical properties of synthesised ZrO 2 -AlO(OH) nanopowders.

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Fracture toughness, strength and slow crack growth in a ceria stabilized zirconia–alumina nanocomposite for medical applications

Cited by 187 publications

References 24 publications

Do Alumina Matrix Composite Bearings Decrease Hip Noises and Bearing Fractures at a Minimum of 5 Years After THA?

Do Alumina Matrix Composite Bearings Decrease Hip Noises and Bearing Fractures at a Minimum of 5 Years After THA?

Tough to brittle transition with increasing grain size in 3Yb-TZP ceramics manufactured from stabilizer coated nanopowder

Thermal and physical properties of ZrO2–AlO(OH) nanopowders synthesised by microwave hydrothermal method

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