Assessment of three dimensional bone augmentation of severely atrophied maxillary alveolar ridges using prebent titanium mesh vs customized poly‐ether‐ether‐ketone (PEEK) mesh: A randomized clinical trial

2019 ◽  
Vol 21 (5) ◽  
pp. 960-967 ◽  
Author(s):  
Mohamed Mounir ◽  
Mahmoud Shalash ◽  
Samy Mounir ◽  
Yasmine Nassar ◽  
Omar El Khatib
Keyword(s):  
Clinical Trial ◽  
Randomized Clinical Trial ◽  
Three Dimensional ◽  
Bone Augmentation ◽  
Titanium Mesh ◽  
Ether Ether Ketone ◽  
Poly Ether Ether Ketone ◽  
Ether Ketone

Fabrication and characterization of three-dimensional poly(ether-ether-ketone)/-hydroxyapatite biocomposite scaffolds using laser sintering

2005 ◽  
Vol 219 (3) ◽  
pp. 183-194 ◽  
Author(s):  
K H Tan ◽  
C K Chua ◽  
K F Leong ◽  
M W Naing ◽  
C M Cheah
Keyword(s):  
Selective Laser Sintering ◽  
Three Dimensional ◽  
Laser Sintering ◽  
Weight Percentage ◽  
Pore Networks ◽  
Precise Control ◽  
Ether Ether Ketone ◽  
Poly Ether Ether Ketone ◽  
Ether Ketone

The ability to have precise control over porosity, scaffold shape, and internal pore architecture is critical in tissue engineering. For anchorage-dependent cells, the presence of three-dimensional scaffolds with interconnected pore networks is crucial to aid in the proliferation and reorganization of cells. This research explored the potential of rapid prototyping techniques such as selective laser sintering to fabricate solvent-free porous composite polymeric scaffolds comprising of different blends of poly(ether-ether-ketone) (PEEK) and hydroxyapatite (HA). The architecture of the scaffolds was created with a scaffold library of cellular units and a corresponding algorithm to generate the structure. Test specimens were produced and characterized by varying the weight percentage, starting with 10 wt% HA to 40 wt% HA, of physically mixed PEEK-HA powder blends. Characterization analyses including porosity, microstructure, composition of the scaffolds, bioactivity, and in vitro cell viability of the scaffolds were conducted. The results obtained showed a promising approach in fabricating scaffolds which can produce controlled microarchitecture and higher consistency.

An Estimation of Fatigue Life for a Carbon Fibre/Poly Ether Ether Ketone Hip Joint Prosthesis

1995 ◽  
Vol 209 (2) ◽  
pp. 93-103 ◽  
Author(s):  
M Akay ◽  
N Asian
Keyword(s):  
Fracture Mechanics ◽  
Carbon Fibre ◽  
Flexural Modulus ◽  
Three Dimensional ◽  
Fibre Length ◽  
Element Analysis ◽  
Ether Ether Ketone ◽  
Poly Ether Ether Ketone ◽  
Ether Ketone ◽  
Three Dimensional Finite Element

A fracture mechanics approach was applied to estimate the life of a prosthesis injection moulded from short carbon fibre reinforced poly ether ether ketone. Flexural modulus and strength, fracture toughness, fatigue endurance limit, fatigue crack growth rate and threshold stress intensity factor were determined. The dimensions of the test pieces were selected to yield fibre orientation and fibre length distributions similar to those obtained in the prosthesis. Stress levels generated in the prosthesis under different activities were estimated by conducting three-dimensional finite element analysis. It was shown by a fracture mechanics approach that a fatigue failure due to the propagation of an embedded elliptical slit, under these stresses, would be unlikely for a crack length smaller than 1.85 mm. However, the cement would fail under the same conditions, irrespective of the type of the prosthesis employed.

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