ATZ – A New Material with a High Potential in Joint Replacement

Begand, Sabine; Glien, Wilfried; Oberbach, Thomas

doi:10.4028/www.scientific.net/kem.284-286.983

Cited by 36 publications

(16 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Excluding ␣-Al 2 O 3 , the phase composition of ZTA, AMC, and ATZ ranges from 58% to 99% t-ZrO 2 , the balance being mostly m-ZrO 2 [162,247]. Minor addition of SrO results in a tertiary magnetoplumbite phase, SrAl 12 O 19 , which forms platelet-type grains.…”

Section: Shown Inmentioning

confidence: 98%

“…Dispersion of the Al 2 O 3 and ZrO 2 grains is therefore an important design element of this material. However, this ceramic is also highly susceptible to hydrothermally induced phase transformation because of the large proportion of t-ZrO 2 grains, although its kinetics are reportedly retarded when compared to Y-TZP ceramics [162]. Representative microstructures of Y-TZP [213] and ZTA [154] are shown in Fig.…”

Section: Grain Size and Morphologymentioning

confidence: 98%

“…At the opposite end of the spectrum, but still consisting of Al 2 O 3 and ZrO 2 , is alumina-toughened zirconia (ATZ) [162]. ATZ is also a completely dense ceramic composed of 80 wt.% Y-TZP and 20 wt.% Al 2 O 3 [162]. As might be expected, this broad range of Al 2 O 3 -ZrO 2 mixtures resulted in marked differences in properties, but all are superior to both pure Al 2 O 3 and Y-TZP.…”

Section: Zirconia Toughened Aluminamentioning

confidence: 99%

“…An industrial standard for its composition and testing has been prepared and published [161]. At the opposite end of the spectrum, but still consisting of Al 2 O 3 and ZrO 2 , is alumina-toughened zirconia (ATZ) [162]. ATZ is also a completely dense ceramic composed of 80 wt.% Y-TZP and 20 wt.% Al 2 O 3 [162].…”

Section: Zirconia Toughened Aluminamentioning

confidence: 99%

See 3 more Smart Citations

Ceramics and ceramic coatings in orthopaedics

McEntire

Bal

Rahaman

et al. 2015

Journal of the European Ceramic Society

188

View full text Add to dashboard Cite

Section: Shown Inmentioning

confidence: 98%

Section: Grain Size and Morphologymentioning

confidence: 98%

Section: Zirconia Toughened Aluminamentioning

confidence: 99%

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

View full text Add to dashboard Cite

“…The maximum radial deformation of the ceramic liner ranged from 1.8-4.4 µm and, thus, was approximately 20% of a typical radial clearance for ceramic-on-ceramic bearings of 20 µm [53]. The maximum determined peak tensile stress of the ceramic liner (129.9 MPa), arising during load-controlled liner insertion, was nowhere near a critical value in terms of ceramic fracture as well [54]. However, under unfavorable conditions, such as an increased press-fit, a decreased wall thickness of the shell, a high bone mineral density, or increased loads, the radial deformation of the shell would increase, leading to increased liner deformation, increased stresses and a further decrease of the clearance, especially in the case of the UHMWPE liners [12][13][14]17,18,42,44,[55][56][57].…”

Section: Discussionmentioning

confidence: 96%

Influence of the Acetabular Cup Material on the Shell Deformation and Strain Distribution in the Adjacent Bone—A Finite Element Analysis

et al. 2020

View full text Add to dashboard Cite

In total hip arthroplasty, excessive acetabular cup deformations and altered strain distribution in the adjacent bone are potential risk factors for implant loosening. Materials with reduced stiffness might alter the strain distribution less, whereas shell and liner deformations might increase. The purpose of our current computational study was to evaluate whether carbon fiber-reinforced poly-ether-ether-ketones with a Young´s modulus of 15 GPa (CFR-PEEK-15) and 23 GPa (CFR-PEEK-23) might be an alternative shell material compared to titanium in terms of shell and liner deformation, as well as strain distribution in the adjacent bone. Using a finite element analysis, the press-fit implantation of modular acetabular cups with shells made of titanium, CFR-PEEK-15 and CFR-PEEK-23 in a human hemi-pelvis model was simulated. Liners made of ceramic and polyethylene were simulated. Radial shell and liner deformations as well as strain distributions were analyzed. The shells made of CFR-PEEK-15 were deformed most (266.7 µm), followed by CFR-PEEK-23 (136.5 µm) and titanium (54.0 µm). Subsequently, the ceramic liners were radially deformed by up to 4.4 µm and the polyethylene liners up to 184.7 µm. The shell materials slightly influenced the strain distribution in the adjacent bone with CFR-PEEK, resulting in less strain in critical regions (<400 µm/m or >3000 µm/m) and more strain in bone building or sustaining regions (400 to 3000 µm/m), while the liner material only had a minor impact. The superior biomechanical properties of the acetabular shells made of CFR-PEEK could not be determined in our present study.Materials 2020, 13, 1372 2 of 16 ceramic and UHMWPE liners combined with structurally identical metallic shells were compared [6]. Therefore, the shell material of modular acetabular cups might have a stronger influence on the strain distribution than the liner material and shells made of polymers might have a lower influence on strain distribution.Besides UHMWPE, poly-ether-ether-ketone (PEEK), often applied with carbon fibers for reinforcement (CFR-PEEK), is a biocompatible polymer that has been introduced as a material for monolithic cups and liners, but not as a material for acetabular shells [7][8][9][10][11].However, PEEK and CFR-PEEK might be suitable alternatives to metal shells in modular acetabular cups as well, in order to avoid adverse effects on stress and strain distribution within the bone stock. However, it was shown that the reduced stiffness of shells made of PEEK and CFR-PEEK leads to increased shell deformations in the case of press-fit fixation in a finite element analysis (FEA) [12]. In particular, shells made of pure PEEK without reinforcement were deformed excessively, resulting in strong deformations of the liners, which might cause further problems in vivo. Excessive liner deformations can lead to a reduced clearance between the liner and femoral ball head and subsequently to increased frictional torques and increased wear rates [13][14][15][16]. Moreover, the seating of the liner might be j...

show abstract

Moisture Effect on Tubular Alumina Toughened Zirconia Ceramic for Implant Casing

Jiang

2010

Ceramic Transactions Series

View full text Add to dashboard Cite

ATZ – A New Material with a High Potential in Joint Replacement

Cited by 36 publications

References 8 publications

Ceramics and ceramic coatings in orthopaedics

Ceramics and ceramic coatings in orthopaedics

Influence of the Acetabular Cup Material on the Shell Deformation and Strain Distribution in the Adjacent Bone—A Finite Element Analysis

Moisture Effect on Tubular Alumina Toughened Zirconia Ceramic for Implant Casing

Contact Info

Product

Resources

About